REPORT ON PUNJAB ISLANDING SCHEME

Transcription

1 (A State Govt. undertaking) REPORT ON PUNJAB ISLANDING SCHEME Revised [R1] (JANUARY, 2013) Office of Chief Engineer/SLDC, Punjab State Transmission Corporation Limited

2 INDEX CHAPTER Page No. 1. Preamble Overview of Punjab Power System 3 3. General Philosophy on formation of Islands 4 4. Islanding Scheme for Punjab Control Area Detail of Proposed Islands 5.1 GGSSTP Ropar Island 8-10 Detail of Load to be met (Annexure- I A) Detail of Lines to be opened and Re-closed (Annexure-I B) Sketch of GGSSTP Ropar Island (Annexure-I C) i-ii iii-iv v-xiv 5.2 GNDTP Bathinda & GHTP Lehra Mohabat Island Detail of Load to be met (Annexure-II A) Detail of Lines to be opened and Re-closed (Annexure-II B) Sketch of GNDTP Bathinda & GHTP Lehra Mohabat Island (Annexure- II C) 6.0 Proposed Action Plan Major Challenges & Way Forward Additional Annexures: APPENDIX Technical Specification of UFRs ( Annexure III) Bill of Material of UFRs (Annexure IV) Status of connectivity & RTU availability at Sub stations ( Annexure V) Line network Diagram of System and boundary of Islands (Annexure VI) i-ii iii iv-x I Minutes of 1st Meeting of Islanding Scheme Group held on Aug-2012 II Transmission Map of Punjab Network (132 KV and above) 26 III Detail of Under Frequency Relays (UFRs) and df/dt Relays installed at various Grid Sub Stations in Punjab

3 CHAPTER PREAMBLE 1.1 Two major grid failure incidents occurred on 30th and 31st July, 2012 affecting a large area of power network covering states namely Uttar Pradesh, Uttarkhand, Punjab, Haryana, Rajasthan, Himachal Pradesh, Delhi falling under Northern Region beside other states of Eastern (ER) & North- Eastern (NER) regions during grid failure on In order to look in to the issues related to the Grid failures and take necessary remedial measures, Ministry of Power (MoP), Govt. of India (GoI) and North Indian States deliberated various steps to be taken during North India Chief Ministers and Power Minister, GOI conference held at Delhi on 6th August A twelve point resolution was approved to avoid grid disturbance/collapse in future. As per the MoP directive, all states must ascertain preparedness of power system defense plans and protection system in accordance with the Indian Electricity Grid Code (IEGC), which shall include islanding schemes, Under Frequency Relays (UFR), rate of change frequency relays (df/dt), special protection schemes (SPS) and automatic demand management schemes. 1.2 An Expert Committee constituted to enquire into the said Power Grid Disturbance and to suggest remedial measures, has also inter alia made the following recommendations:- 1.3 "Effort should be made to design islanding scheme based on frequency sensing relays so that in case of imminent grid failure, electrical islands can be formed. These electrical islands can not only help in maintaining supply to essential services but would also help in faster restoration of grid. Action: CEA, RPCs, POWERGRID, STUs, SLDCs and Generators Time Frame: 6 months" The Expert Committee has further formed five groups to look in to various aspects related to grid disturbances. One of the groups headed by Member Secretary, NRPC was formed for islanding scheme in Northern Region. Minutes of first meeting of the islanding Scheme group was held at NRPC office at Delhi on (Copy enclosed as Appendix I) which was attended by representatives from all constituents under NR. The group agreed on various aspects & modalities for implementation of the islanding 1

4 scheme. Based on proposals from STUs/SLDCs, preliminary feasibility of various islanding schemes was agreed. 1.4 In order to take up implementation of the islanding scheme in Punjab Control Area by PSTCL, deliberations were held with representatives of Power Grid (Operation Services Group) who have been associated in finalizing the islanding scheme for DTL recently. A study-cum-implementation group has also been constituted by PSTCL to identify & work out further modalities for taking up design & implementation of the scheme in line with guidelines of CEA, NRPC, PGCIL etc. 1.5 Based on the inputs provided by NRPC/ PowerGrid and deliberations amongst study group including PSPCL's representatives from all the three major thermal generating stations (GGSSTP, GHTP & GNDTP) and BBMB, PSTCL finalized the islanding scheme for Punjab control area, comprising of the following 3 no. island; i) ii) iii) The Punjab GGSSTP Ropar with Gobindgarh area load. GHTP & GNDTP with Bathinda area load. BBMB Jamalpur with Ludhiana load. Islanding scheme report dated was submitted to NRPC for approval. 1.6 The Islanding scheme was reviewed by NRPC/CEA during presentation made by PSTCL held at NRPC, New Delhi on 21st Dec, 12. Based on the suggestions/comments made by NRPC/CEA during the presentation, the revised Islanding scheme has been prepared. 1.7 The major modifications /revisions made are as under;i) Only 2 no islanding scheme for GGSSTP and GHTP cum GNDTP generating stations has been retained thereby excluding BBMB Jamal Pur scheme as proposed earlier since BBMB Bhakra hydel Units have quick black start facility. ii) Both summer/paddy season (peak period) and winter season average (off peak period) loading scenarios have been considered. iii) Remote monitoring and control of islands through MMI/SCADA based intelligent system at SLDC has been incorporated to manage the islands, on the pattern of DTL scheme. iv) 2 no important railway feeding stations at Sahnewal & Jamsher have been included in the proposed islands. 2

5 CHAPTER OVERVIEW OF PUNJAB POWER SYSTEM 2.1 The Transmission functions in Punjab Power System are performed by Punjab State Transmission Corporation Ltd. (PSTCL) whereas Generation & Distribution functions are performed by Punjab State Power Corporation Ltd. (PSPCL). Punjab Power System is operative with a number of generating stations both Thermal and Hydel (Total Gross Generation = 3650 MW approx) in the state sector owned by PSPCL. Beside this Punjab also draws its share from BBMB Hydro-Generating stations through BBMB Transmission network.the Punjab network is also linked with 400 KV PGCIL network at Malerkotla, Moga, Patiala, Ludhiana, Jalandhar and Amritsar to draw Central sector share. 2.2 The transmission network of Punjab consists of 132 KV & 220 KV network spread all over the state. Presently, a major 400 KV transmission network in PSTCL is also in advanced stage of commissioning mainly for the evacuation of power from upcoming Thermal Power Stations in Private sector (IPPs) at Talwandi Sabo and Rajpura. The transmission map of Punjab 132 KV & above is attached as Appendix II 2.3 The Punjab has transformation capacity of 20800MVA approx. and 220 kv & 132 kv transmission lines of 8200 Ckt. Km (as on ).There is a plan to add further transformation capacity of 2000MVA during and 2000MVA in The present transformation capacity of ICTs located in Powergrid Grid Sub-stations in Punjab is also being augmented under Inter state system strengthening scheme undertaken by Power grid. Corresponding to these transformation capacity additions, new transmission links are being added/planned by PSTCL at respective Grid sub stations. 3

6 CHAPTER GENERAL PHILOSOPHY ON FORMATION OF ISLANDS 3.1 During Grid disturbance,the control area shall endeavor to sustain through the under frequency relays (UFRs) and df/dt relays based load shedding scheme, already installed in the system, as a first line of defense. Only in case, this defense mechanism fails and frequency continues its fall to dangerously low levels, formation of islands shall be initiated as a last resort. 3.2 For success of islanding scheme, the load - generation balance in the islands shall be maintained. To achieve this, at least one of the generators within the island, shall operate with governor in frequency control mode. 3.3 Islanding scheme shall primarily be a two tier scheme. At frequency of 47.9 Hz, signal/command for formation of islands comprising of more than one generating station along with pre-identified load shall be initiated. However, if after the formation of island, frequency continues to fall further to say 47.7 Hz, these islands could be further broken into smaller islands or load shedding shall be initiated within the island. 3.4 Load generation balance in pre-identified island may change based on variation in seasonal demand, load growth and network changes, if any. Islanding scheme shall therefore require intermittent review and readjustments of loads to be cut-in/cut-off to match load - generation balance. 3.5 Efforts shall be made to cover major essential loads such as hospitals, railway traction etc. in the proposed island. However, if it is not possible due to some reasons, efforts should be made to extend supply from these islands to identified essential loads on priority basis. 4

7 CHAPTER ISLANDING SCHEME FOR PUNJAB CONTROL AREA: 4.1 Objective: Formation of proposed island shall achieve the following objectives:i) Prevention from total black out by avoiding effect of cascade tripping of the Power System. ii) Fast restoration of supply to the affected areas. iii) Supply to Important Loads/essential services i.e. Railways, Hospitals etc. shall be maintained or can be restored on priority 4.2 Present Status: Presently there is no islanding scheme in operation in Punjab. However, UFRs, df/dt relays have been installed on selected feeders to get desired load relief under critical grid conditions to help grid security. A list of existing UFR and df/dt relays is attached as Appendix III. 4.3 Proposed Islands: The following islands have been proposed,as identified by the Islanding Scheme Group at NRPC in its meeting held on and further deliberations held at NRPC on :- GGSSTP Ropar with Gobindgarh area load. GHTP & GNDTP with Bathinda area load. 4.4 Methodology of Proposed Islanding Scheme; Broad methodology adopted for the proposed Islanding scheme is as under :- i) The scheme is primarily based on frequency measurement. This measurement will be done through digital frequency sensing relays (UFRs) to be installed at substations falling within island where 5

8 switching action is required. ii) The proposed island scheme shall required to be configured /reconfigured for peak and off peak operating conditions. The preidentified relays ( UFRs) at the sub stations shall be enabled during off peak period to cover the extended load, to match the available generation. These relays shall be disabled during peak period. iii) The proposed islanding scheme operations consists of three stages as under;a) b) c) Stage I: Stage II: Stage III: When frequency dips to level of When frequency further dips to level of When frequency stays at * * additional load shedding at an interval of 300 milli-seconds up to 2 seconds in steps iv) Disconnection of feeders will be triggered through UFRs proposed to be installed at Sub stations. Two independent relays, for sensing the frequency from each bus of sub station shall be provided at each of the sub station falling under the islanding zone, classified as under: v) Relay on Bus-1 = M1 and S1 Relay on Bus-2 = M2and S2 Up to 3 no 220 KV feeder will have dedicated set of relays (M1 and M2) whereas in case of 66 KV feeders, one set of relay (S1 and S2) will control up to four 66 KV feeders. S1 & S2 shall also control high frequency swings in the island by operating at 50.5 Hz & 51.0 Hz for auto reclosing the pre-identified feeders. The setting of relays shall be as under:m1 M2 S1 S2 S1 S Hz (for Auto reclosing) S1 S Hz (for Auto reclosing) 6

9 vi) Initially main two islands of Punjab Network will be created during stage I of Islanding scheme (i.e. when frequency dips to level of ). The large island will further be divided into smaller island(s) during stage II of Islanding scheme (i.e. when frequency dips to level of 47.7 Hz ). vi) One generating station in each island will be operated in frequency control mode to control fluctuations in the frequency in that particular island. vii) Islanding load to be identified shall exclude the anticipated impact due to load shedding under defense mechanism prior to islanding through existing UFR & df/dt relays. 4.5 MECHANISM FOR FORMATION AND MAINTAINING ISLANDS i) As system frequency is sensed at, relays (M1 and M2) will operate and trip the identified feeders, thus forming a stage-i island. ii) The frequency of the island so formed shall be further maintained through both generator and load end. On generator end, one of the units shall be operated in frequency mode and on load side when the frequency drops to the level of (Stage-II), relays (S1 and S2) will operate to switch off the pre-identified 66 KV feeders as per the detail provided in the schematic diagram. vii) To take care of the power swings due to sudden load throw off during formation of island, relays (S1 and S2) will operate at Hz/ Hz (Stage III) to auto reclose the pre-identified 66 KV feeders of 4-5 MW with time delay of 300 msec in steps as per detail provided in the schematic diagrams. 7

10 CHAPTER-5.0 (A State Govt. undertaking) ISLANDING - I GGSSTP, Ropar ISLANDING SCHEME 8

11 5.1 GGSTP ROPAR ISLANDING SCHEME There are six Units (6x210 MW) at GGSSTP Ropar. Total ex-bus generation equals to 940 MW considering availability of 5 units and corresponding average load for island 80% of 940 MW comes to 755 MW. The generation availability is considered as same during peak and off peak periods. Details of load to be fed to achieve Load-Generation balance is as under:name of S/S Average Under Load Peak (MW) Average Load (MW) Load Under Off Peak Load (Summer) (Winter) 220 KV S/S G KV S/S G KV S/S G KV S/S G KV S/S Amloh KV S/S Kharar KV S/S Kohara KV S/S Sahnewal 10( Only Railway Load) 10( Only Railway Load) 220 KV S/S Jamsher NA 10( Only Railway Load) 220 KV S/S Goraya NA 75 Total Note : The UFR presently installed at 220 KV G-1 will be shifted to 220 KV S/S Mohali-1 and Mohali-2 (at setting of 48.2 Hz) to meet the above demand. Details of sub stations wise load /feeders to be covered for load generation balance in the island is as per Annexure-IA 9

12 Detail of outgoing feeders/bays to be opened (in order to maintain the above anticipated islanding load of 755 MW) is as under: KV GGSSTP - Mohali Ckt (will be opened at Mohali end) 220KV Kharar Mohali Ckt (will be opened at Kharar end) 220KV Kharar 132 KV Ropar Ckt 220KV GGSSTP - Goraya Ckt (will be opened at Goraya end in Summer) 220KV GGSSTP - Goraya Ckt (will be operative in Winter) 220KV GGSSTP: Jamsher Ckt (will be opened at Jamsher end in Summer) 220KV GGSSTP: Jamsher Ckt (will be operative in Winter) 220/132 KV T/F: T-1 (at GGSSTP S/S) 220/132 KV T/F: T-2 (at GGSSTP S/S) 220 KV G-1: Ablowal circuits 1 & 2 (to be opened at G-1) 220 KV S/S G-1: Ikolaha (at G-1 end) 220 KV S/S G-2: Ganguwal Circuits 1 & 2 (to be opened at G-2 end) 220 KV S/S Amloh- Malerkotla (at Malerkotla end) 220 KV Sahnewal- Lalton (At Sahnewal) 220 KV Sahnewal- Doraha 1 & 2 (at Sahnewal) 220 KV Sahnewal-PGCIL (At Sahnewal) 220 KV Bus-Coupler at Sahnewal 220 KV S/S Jamsher:- Jalandhar-1,2, Rehana Jattan Mahilpur, Sultanpur1,2, Kotla Junga-1,2, 220KV/66KV T-1,T-2 will be opened at Jamsher End in Winter All 66 KV lines at Kohara & 66/11 KV Power Tfrs. (T-3 & T-4) Detail of lines to be opened and re-closed at various sub stations is as per Annexure-IB. Detail indicating locations of relays is given as per schematic diagram attached as Annexure-IC 10

13 Details of Load to be met :- Page-(i) Sr.No. Name of Plant Details of area to be fed Summer Load Gross Total Generation(MW) Generation considered for islanding purpose(mw) Winter Load Relief from UFRs(in MW) (MW) (MW) Paddy Load Relief from df/dt relays(in MW) Paddy Load Relief from SPS (in MW) Paddy Load G. Total Load relief(mw) Paddy Load Annexure-IA Net Demand to be met (MW) 220KV s/s Gobindgarh G GGSSTP, Ropar 220KV s/s Gobindgarh G (6x210=1260MW) 755 ((i.e. 80% of 945) 220KV s/s Gobindgarh G Ex-bus generation of 5 units 220KV s/s Gobindgarh G = 945 MW 220 KV S/S Amloh KV S/S Kharar KV S/S Kohara KV S/S Sahnewal KV S/S Jamsher NA KV S/S Goraya NA 75 Total

14 Page-(ii) Details of Break-up of Load to be met :- Annexure-IA S.No Name of Substations Load (MW) BREAK-UP OF LOAD Load(MW) KV Sub Station KV Ckt Amloh Road-1 0 Gobindgarh G-1 66 KV Ckt Amloh Road KV Ckt Joti Bansal KV Ckt Modern Steel KV Ckt Dutt Multi 6 66 KV Ckt Aman 3 66 KV Ckt Raghay Nabha KV Ckt Talwara KV Ckt Talwara KV Ckt Bhiwani Industry KV Ckt Focal Point Bassi Alloy KV Ckt Bassi Alloy 9 66 KV Ckt T1,T4,T KV Sub Station KV Ckt Bharri 20 Gobindgarh G-2 66 KV Ckt Punjab Forge KV Ckt Khanna KV Ckt Khanna /11 KV T/F T KV Ckt Amloh Road KV Ckt Amloh Road /11 KV T/F T /11 KV T/F T KV Sub Station KV Ckt Sanjeev Bhatia* 5 Gobindgarh G-3 66 KV Ckt KC Soni* 3 66/11 KV T/F T /11 KV T/F T /11 KV T/F T /11 KV T/F T /11 KV T/F T-6 16 Summer/Winter Summer/Winter KV Sub Station 80/40 66KV Sirhind Ckt-1 34/14 Gobindgarh G-4 66KV Sirhind Ckt-2 34/14 66/11 KV 20MVA T/F 12 Summer/Winter Summer/Winter KV S/S Amloh 120/80 66 KV Ckt Modern Alloys KV Ckt Neelkanth 5 66 KV Ckt Tanda Badha 35/10 66 KV Ckt Bimal Alloys 25 66/11 KV T/F T-1 15/5 66/11 KV T/F T-2 15/10 Summer/Winter Summer/Winter KV S/S Kharar 115/ KV Ckt Morinda-1 18/16 66 KV Ckt Morinda-2 18/15 66 KV Ckt Badali 15/14 66 KV Ckt PTL Majri 6 66 KV Ckt Dera Bassi KV Ckt Majra KV S/S Kohara 30 T2 66/11 KV 17 T6 66/11 KV KV S/S Sahnewal KV Railway Ckt-1,2 10 Summer/Winter Winter KV S/S Jamsher NA/10 220KV Railway Chaheru KV S/S Goraya NA/75 220/132 KV T /132 KV T KV Ckt Roorkee KV Ckt Dausand 8 66 KV Ckt Uppran 9

15 Page-(iii) GGSSTP ROPAR ISLAND : Details of Lines to Opened & Re-closed S.No Name of Substations Details of Feeders to be disconnected (through Relays M1, M2) Details of Feeders to be disconnected (through Relays S1, S2) KV S/S GGSSTP Ropar 220KV GGSSTP: Mohali Ckt Nil 220KV GGSSTP: Goraya Ckt 220KV GGSSTP: Jamsher Ckt 220/132 KV T/F: T-1 220/132 KV T/F: T KV Sub Station Gobindgarh G-1 220KV Gobindgarh G-1 : Ablowal Ckt-1 66 KV Ckt Amloh Road-1 Remarks Ckt will be operative in winter Ckt will be operative in winter Annexure-IB 220KV Gobindgarh G-1 : Ablowal Ckt-2 66 KV Ckt Amloh Road-2 220KV Gobindgarh G-1 : Ikolaha 66 KV Ckt Chorwala 66 KV Ckt Amloh 66 KV Ckt Joti Bansal 66 KV Ckt Modern Steel 66 KV Ckt Dutt Multi 66 KV Ckt Aman 66 KV lines to be tripped, if required after time delay of 300 milli-seconds upto 2 seconds at 47.7 Hz to provide stability 66 KV Ckt Raghay Nabha 66 KV Ckt Talwara-1 66 KV Ckt Talwara-2 66 KV Ckt Bhiwani Industry 66 KV Ckt Focal Point Bassi 66 KV Ckt Bassi Alloy KV Sub Station Gobindgarh G KV Gobindgarh G-2: Ganguwal Ckt-1 66 KV Ckt Grain Market 220 KV Gobindgarh G-2: Ganguwal Ckt-2 66 KV Ckt Bharri 66 KV Ckt Punjab Forge 66 KV Ckt Khanna-1 66 KV Ckt Khanna-2 66/11 KV T/F T-1 66 KV Ckt Badinpur 66 KV Ckt Amloh Road-1 66 KV Ckt Amloh Road-2 66 KV Ckt Central 66/11 KV T/F T-2 66/11 KV T/F T-3 All 66 KV lines to be tripped by S-1/ S-2 relays at. df/dt already installed on 66 KV Grain Market, 66 KV Central & 66 KV Badinpur feeders

16 Page-(iv) GGSSTP ROPAR ISLAND : Details of Lines to Opened & Re-closed KV Sub Station Gobindgarh G-3 Nil 66 KV Ckt-1 G2 66 KV Ckt-2 G2 66 KV Ckt Sanjeev Bhatia* 66 KV Ckt KC Soni* 66 KV Ckt-1 G1 66 KV Ckt-2 G1 66/11 KV T/F T-1 tot T KV S/S Amloh 220 KV Amloh : 220 KV Ckt Malerkotla 66 KV Ckt Modern Alloys 66 KV Ckt Neelkanth 66 KV Ckt Amloh Road 66 KV Ckt Gobindgarh 66 KV Ckt Tanda Badha 66 KV Ckt Bimal Alloys 66/11 KV T/F T-1, T KV S/S Kharar 220 KV Kharar: 132 KV Ckt Ropar Nil 220 KV Kharar: 220 KV Ckt Mohali-1 Nil * These lines will be reclosed at Hz Annexure-IB All 66 KV lines to be tripped by S-1/ S-2 relays at 66 KV lines to be tripped, if required after time delay of 300 milli-seconds upto 2 seconds at 47.7 Hz to provide stability KV S/S Kohara 66 KV Ckt Allied Industry* Nil 66 KV Ckt Chaunta Bhaini Sahib* 66 KV Ckt Mahalaxami* 66/11KV T/F T-3 & T/F T KV S/S Sahnewal 220 KV Sahnewal : 220 KV Ckt Lalton-1 Nil 220 KV Sahnewal : 220 KV Ckt PGCIL 220 KV Sahnewal : 220 KV Ckt Doraha KV Sahnewal : 220 KV Ckt Doraha-2 220KV Bus Coupler KV S/S Jamsher 220 KV Jamsher : 220 KV Jalandhar-1, 2 Nil (For Winter Only) 220 KV Jamsher : 220 KV Rehana Jattan 220 KV Jamsher : 220 KV Mahilpur 220 KV Jamsher : 220 KV Sultanpur-1, KV Jamsher : 220 KV Kotla Junga-1, 2 220/66 KV T/F: T-1, T KV S/S Goraya Nil Nil (For Winter Only) All 66 KV lines /T/Fs to be tripped by relays at * These 66KV lines will be reclosed at Hz RTP-Jamsher Ckt will be opened from Jamsher End in Summer RTP-Goraya Ckt will be opened from Goraya End in Summer

17 Guj Ambuja Ropar Asron Annexure-I C GGSSTP, Ropar Islanding Scheme 755 MW B.C. 132 kv Bus Bars ILK 100 MVA, 220kV/132 kv ILK 100 MVA, 220kV/132 kv Mohali Kharar 115 MW-PADDY 110 MW NON PADDY GG-4 80 MW PADDY 40 MW NON PADDY GG-3 80 MW GG MW GG MW Goraya 75 MW in non paddy season Jamsher Only Railway Load Sahnewal No Load Kohara 30 MW B.C kv Bus Bars B.C.-1 v

18 Amloh Rd1 Amloh Rd2 Chorwala Amloh Joti Bansal Modern Steel DLT Multi Aman Raghav Nabha Talwara - 1 Talwara - 2 Bhawani Ind Focal Point Bassi Alloy 47.7Hz 66 kv lines to be tripped after time delay of 300 ms to provide stability T A T A T A 66 kv Bus Bars G-1 & G-4 (280 MW = PADDY MW NON PADDY) UFR (48.2 Hz) installed here to be shifted to Mohali S/S T2, 100 MVA, 220kV/66 kv T5, 100 MVA, 220kV/66 kv T6, 100 MVA, 220kV/66 kv RTP 4 RTP 3 Patiala 2 Patiala 1 Amloh RTP 2 Ikolaha RTP 1 GG 2-Ckt2 GG 2-Ckt1 B.C 220 kv Bus Bars vi 220 kv S/S G-4 (80 MW)

19 D1 df/dt relay, already installed(controls 105 MW load). To be provided OR Logic for tripping at D1 D1 D1 Grain Market Bharri Pb. Forge Khanna-I Khanna-2 66/11 kv T-1 Badinpur Amloh Rd-1 Amloh Rd-2 Central 66/11 kv T2 66/11 T-3 66 kv Bus Bars G-2 (125 MW= ) T1, 100 MVA, 220kV/66 kv T5, 100 MVA, 220kV/66 kv Ganguwal 1 Ganguwal 2 T-N, 100 MVA, 220kV/66 kv G2-G1 Link1 G2-G1, Link2 220 kv Bus Bars vii

20 Chorwala UFR 48.8 Hz Already installed 42 MW G2 Ckt-1 G2 Ckt-2 Sanjiv Bhatia KC Soni G1 Ckt-2 G1 Ckt-1 T-1 T-2 T-3 T-4 T-6 Re-close LILO G-2 LILO G-1 Re-close 66 kv Lines will re-close ( & )at 51.0 Hz Reclosing load to be 4 to 5 MW per feeder T6, 100 MVA, 220kV/66 kv G-3 (122-42= 80 MW) T-5, 100 MVA, 220kV/66 kv 66 kv Bus Bar 220 kv Bus Bar viii

21 D2 df/dt relay, already installed. D2 D2 D2 Sahnewal-1 Sahnewal-2 Kanganwal-1 Kanganwal-2 Latala UFR-48.8 Hz Kohara Avery Garg Vallabh Sportking 66/11 kv T-2 66/11 kv T-5 66 kv Bus Bars Sahnewal (Only Railway load) T1, 100 MVA, 220kV/66 kv T4, 100 MVA, 220kV/66 kv Bus-I will remain charged for redundancy of supply at Kohara T3, 100 MVA, 220kV/66 kv Lalton 1 PGCIL,Lalton Railway Ckt. 2 Railway Ckt. 2 Kohara RTP Doraha-1 Doraha kv Bus I B.C at 220 kv Bus Bars 220 kv Bus II No Load Except Railways ix

22 Load of 66/11 kv Power T/F s T-2 & T-6 is 30 MW Allied Industry Chaunta-Bhaini Sahib Mahalauxmi T2, 66/11 kv T3, 66/11 kv T4, 66/11 kv T6, 66/11 kv Re-close Re-close 66 kv Lines will re-close ( & )at 50.5 Hz Time delay in ms between lines (30 MW) Kohara ( = 30MW) T1, 100 MVA, 220kV/66 kv T-5, 100 MVA, 220kV/66 kv 66 kv Bus Bar RTP Sahnewal 220 kv Bus Bar x

23 Bhadson Modern Neelkanth Amloh Road Gobindgarh UFR 48.8 Hz 17 MW Tanda Badha Bimal Alloys 66/11 kv T-1 66/11 kv T-2 66 kv Bus Bars Gobindgarh-1 T3, 100 MVA, 220kV/66 kv Amloh (137-17= 120 MW PADDY 55 MW NON PADDY) Malerkotla At Malerkotla T4, 100 MVA, 220kV/66 kv Load Shedding schemes to Be installed for redundancy- Operation at with time delay to sustain the island 220 kv Bus Bar xi

24 Ropar GGSSTP Mohali kv Bus Bar 220 kv Bus Bar 16/20 MVA, 132kV/66 kv 100 MVA, 220 kv/66 kv 100 MVA, 220 kv/66 kv Kharar (120 MW PADDY 110 MW NON PADDY) 66 kv Bus Bar Morinda-1 Morinda-2 Badali Mohali PTL Majri Dera Bassi Majra xii

25 66kV Bus 100 MVA 220/66 KV Power Transformers (2) Jamsher Only Railway Load 220 kv Bus coupler 220 kv Bus Sultanpur-1 & 2 Jalandhar-1 Jalandhar-2 Rehana Jattan Mahilpur GGSSTP Ropar Railway Goraya Kotla Junga- 1 & 2 xiii

26 GORAYA (75 MW NON PADDY LOAD) 220 KV GGSSTP Ropar 220 KV Jamsher 220 kv Bus Bar Three UFR s TO BE DISABLED DURING NON PADDY SEASON 100 MVA, 220kV/132kV POWER Transformers 100 MVA, 220 kv/66 kv 132 kv Bus Bar 25 MVA, 132 kv/33kv & 2 nos 20 MVA 132/11 KV Power Transformers Phillaur Nurmehal Nawan Shehar Jamalpur Remains off from other end Phagwara 1 & 2 66 kv Bus Bars 33 KV Muthadda Dosanjh Kalan Rurka Appra xiv

27 (A State Govt. undertaking) ISLANDING - II GNDTP& GHTP ISLANDING SCHEME 11

28 5.2 GNDTP, BATHINDA AND GHTP LEHRA MOHABAT ISLANDING SCHEME This island shall include GHTP Lehra Mohbbat & GNDTP, Bathinda. Initially two Units of GNDTP (2x110 MW) and three Units of GHTP Lehra Mohabat (2x x250MW) are proposed under stage-1 (when the frequency comes down to ). Total ex-bus generation equals to 800 MW considering availability of two units of GNDTP (2x110 MW) and three units of GHTP Lehra Mohabat (2x x250MW).The corresponding average load for island 80% of 800 MW comes to 640 MW. The generation availability is considered as same during peak and off peak periods. DETAIL OF SUBSTATION WISE LOADS FALLING IN THE GNDTP-GHTP ISLAND(S) Name of S/S 220 KV S/S GNDTP (Local Load) Avg. Load Summer 105 MW (GNDTP) Avg. Load Winter 75 MW(GNDTP) 132 KV S/S IGC 55 MW(GNDTP) 45 MW(GNDTP) 132 KV S/S Maur NA 40 MW(GNDTP) 220 KV S/S GHTP (Local Load) 170 MW(GHTP) 130 MW(GHTP) 220 KV S/S Himmatpura 135 MW(GHTP) 55 MW(GHTP) 220 KV S/S Bajakhana 120 MW(GHTP) 55 MW(GHTP) 220 KV S/S Barnala (PSTCL) 55 MW(GHTP) 40 MW(GHTP) 220 KV S/S Mansa NA 125 MW(GHTP) 220 KV S/S Jhunir NA 75 MW(GHTP) Total (GNDTP + GHTP) 640 MW 640 MW Details of sub stations wise load /feeders to be covered for load generation balance in the island is as per Annexure-IIA 12

29 DETAILS OF LINES TO BE OPENED UNDER GNDTP BATHINDA ISLAND -I 220KV GNDTP: Baluana Ckt (At Balluana) (remain in island during winter) 132 KV IGC- Maur Line (at IGC S/S) (remain in island during winter) 66 KV Vardhman (At IGC S/S) (remain in island during winter) 66 KV Kot Shamir (At IGC S/S) (remain in island during winter) 220 KV GNDTP: NFL 1 & 2 (remain in island during winter) 220 KV GNDTP: MES 220KV GNDTP: 220 KV Mukatsar-1 Ckt (At Muktsar) 220KV GNDTP: 220 KV Mukatsar-2 Ckt ( At Malout) DETAILS OF LINES TO BE OPENED UNDER GHTP ISLAND II 220KV GHTP: Mansa 1 & 2 (at Mansa) (remain in island during winter) 220KV Bajakhana- Moga (Bajakhana end) 220KV Bajakhana- Muktsar (Bajakhana end) 220KV GHTP- Barnala (BBMB) 220KV Barnala (PSTCL)- Barnala (BBMB) 220 KV Barnala (PSTCL)- 220 KV Malerkotla Ckt (at Malerkotla) 220 KV Mansa KV Refinery Ckt-1 and Ckt-2 AT 220 KV BARNALA (PSTCL) 66 KV Tapa 66 KV Pakhoke 66 KV Dhaula (UFR already installed) 66 KV VarIndera 66 KV Dhanaula 1 & 2 66 KV Abhishek 66 KV Thuliwal (UFR already installed) 66 KV Malwa 66 KV Bus Coupler Detail of lines to be opened and re-closed at various sub stations is as per Annexure-IIB. Detail indicating locations of relays is given as per schematic diagram attached as Annexure-IIC Stage II Island Operations: If the frequency further falls below, it is proposed to further disintegrate this large island into two islands with each generating station catering to its connected load. 13

30 Details of Load to be met :- Page-(i) Sr.No. Name of Plant Details of area to be fed Summer Load Winter Load Relief from UFRs(in MW) Relief from df/dt relays(in MW) Relief from SPS (in MW) G. Total Load relief(mw) Annexure-IIA Net Demand to be met Gross Total Generation(MW) Generation considered for islanding purpose(mw) (MW) (MW) Paddy Load Paddy Load Paddy Load Paddy Load (MW) 1(i) GNDTP,Bathinda 2x110-20= KV S/S Bathinda (Local Load) x110=440MW 132KV S/S IGC KV S/S Maur NA 40 (ii) GHTP, LehraMohabat 2x210+1x250-70= KV S/S LehraMohbat (Local Load) (920MW) 220KV S/S Himatpura KV S/S Bajakhanna G. Total (i)+(ii) = 1360 G. Total (i)+(ii) = KV S/S Barnala(PSTCL) KV S/S Mansa NA KV S/S Jhunir NA 75 80% of G.Total = 640MW Total (MW) GNDTP, Bathinda KV s/s Bathinda x110=440MW (i.e 80 % of 2x110) 132KV s/s IGC KV S/S Maur NA 40 Total (MW) GHTP, LehraMohabat KV s/s LehraMohbat (Local Load) 220KV Himatpura KV s/s Bajakhanna (920MW) (i.e. 80% of (2x210+1x KV s/s Barnala(PSTCL) =600)) 220KV S/S Mansa NA KV S/S Jhunir NA Total (MW)

31 Page-(ii) Details of Break-up of Load to be met :- Annexure-IIA S.No Name of Substations Load (MW) BREAK-UP OF LOAD Load(MW) Summer/Winter Summer/Winter KV S/S GNDTP Bathinda 105/75 220/66KV 1X100 MVA T/F 70/45 66 KV C-Compound 15/10 66 KV MES(Cantt.) KV S/S IGC Bathinda 55/45 66 KV Dabwali Road 32/26 132/11 KV T/F 8/4 66 KV Vardhman 9 66 KV Kot Shamir KV S/S Maur NA/40 132/66 KV T/F T /66 KV T/F T /66 KV T/F T /66 KV T/F T KV Sub Station GHTP Lehra 170/ KV Rampura 40/30 66 KV Phul 30/20 66 KV Blucho 25/20 66 KV Nathana 25/20 66 KV Bhai Rupa 35/27 66 KV Lehra Mohabbat 2/2 66 KV Vikram Cement 7/7 66 KV Balianwala 6/ KV Sub Station Himmatpura 135/55 66 KV Ckt Bahadur 30/10 66 KV Ckt Bilaspur 30/12 66 KV Ckt Patto Hira Singh 25/8 66 KV Ckt Dina Sahib 20/10 66 KV Ckt Tallewal 20/10 220/66 KV T/F: T-2 10/ KV S/S Bajakhana 120/55 66/11 KV T-2 9/4 66/11 KV T-3 10/6 66 KV Maluka 4/3 66 KV Jaito 24/10 66 KV Bhagta 38/20 66 KV Jeeda 15/5 66 KV Bargari 20/ KV S/S Barnala PSTCL 55/40 66/11 KV T/F T-4 10/6 66/11 KV T/F T-5 15/11 66 KV Barnala Ckt. 30/ KV S/S Mansa NA/ KV Budhlada KV Budhlada KV Joga 8 66 KV Dhalewan 6 66 KV Bhikhi KV Maur 15 66/11 KV T/F T /11 KV T/F T KV S/S Jhunir NA/75 66 KV Sardulgarh KV Aalike KV Mansa 40 66/11 KV T/F 10

32 Page-(iii) GNDTP BHATINDA AND GHTP LEHRA MOHABAT ISLAND : Lines/Bays to be opened & re-closed S.No Name of Substations Details of Feeders to be disconnected (through Relays M1, M2) Details of Feeders to be disconnected (through Relays S1, S2) Remarks KV S/S GNDTP Bathinda 220KV GNDTP: 132 KV Baluana Ckt 220 KV GNDTP: 220 KV GHTP Ckt-1 132KV Baluana, NFL-1,2, Cantt & 132 KV IGC Ckts will remain 220KV GNDTP: 220 KV Mukatsar-1 Ckt 220 KV GNDTP: 220 KV GHTP Ckt-2 operative during winter season 220KV GNDTP: 220 KV Mukatsar-2 Ckt (Malout) 220 KV GNDTP: 66 KV C-Compound 220KV GNDTP: 132 KV NFL KV GNDTP: 66 KV MES(Cantt.) Tripping after time delay of 0.5 seconds 220KV GNDTP: 132 KV NFL-2 Tripping after further time delay of 0.5 sec (total 1 sec) 220KV GNDTP: 132 KV Cantt 2 132KV s/s IGC Bathinda 132 KV IGC: 132 KV Maur 132 KV IGC: 66 KV Dabwali This Ckt will be operative during winter season 132 KV IGC: 66 KV Kot Shamir -do- 132 KV IGC: 66 KV Vardhman(Mahavir) -do- -do- Annexure-IIB KV Sub Station GHTP Lehra Mohabat 220 KV GHTP: 220 KV Barnala BBMB Ckt 66KV ckt BTI Thermal 1* * All 66 KV lines to be tripped by S-1/ S-2 relays at to sustain the island 66KV ckt BTI Thermal 2* KV Sub Station Himmatpura Nil 66 KV Ckt Bahadur** 66 KV Ckt Bilaspur** 66 KV Ckt Patto Hira Singh** 66 KV Ckt Dina Sahib** 66 KV Ckt Tallewal** 220/66 KV T/F: T-2** KV S/S Bajakhana 220 KV Bajakhana: 220 KV Ckt Mukatsar Nil 220 KV Bajakhana: 220 KV Ckt Moga Nil KV Sub Station Barnala PSTCL 220KV Barnala : 220KV Malerkotla ckt 1 66/11KV KV T/F: T-4* 220KV Barnala : 220KV Malerkotla ckt 2 66/11KV T/F: T-5* 220KV Barnala(PSTCL)-220KV Barnala(BBMB) 66 KV Ckt Barnala* 220KV Barnala : 66 KV Pakhoke Ckt 220KV Barnala : 66 KV Tapa Ckt 220KV Barnala :66KV Ckt Varindra 66 KV lines to be tripped, if required after time delay of 300 milliseconds upto 2 seconds at to provide stability ** These lines will be reclosed at Hz * All 66 KV lines to be tripped by S-1/ S-2 relays at to sustain the island 220 KV Barnala: 66 KV Abhishek 220KV Barnala : 66 KV Malwa ckt 220KV Barnala : 66 KV Bus coupler KV S/S Mansa 220 KV Mansa: 220 KV Refinery Ckt-1 Nil 220 KV Mansa: 220 KV Refinery Ckt KV Mansa: 220 KV GHTP Ckt KV Ckt will be operative during winter season 220 KV Mansa: 220 KV GHTP Ckt-2 -do KV S/S Jhunir (for Winter) 220 KV Jhunir: 220 KV Mansa Nil

33 GNDTP (160 MW) Islanding Scheme Annexure-II C B.C. 132 kv Bus Bars 220 kv Bus Bars B.C. 40/50 MVA, 132kV/66 kv 25 MW 16/20 MVA, 132kV/66 kv 10 MW Cantt NFL-2 NFL-1 Balluana Auto T/F Leh-2 Leh-1 Muktsar Malout IGC All these relays will be disabled in non paddy season Auto T/F 100 MVA, 220kV/66 kv 70 MW 66 kv Bus Bars Coupling 132 KV IGC 132/11 KV (8 MW) 66 kv Bus Bar Installed at IGC S/S 66KV Kot Shamir 66 KV Mahavir Maur All these relays will be disabled in non paddy season 66 KV Dabwali Road at 32 MW 66 KV MES (20 MW) At with TD of 1 sec iv 66 KV C-Compound (15 MW) At with TD of 0.5sec SI/S2

34 Rampura Phul Bhucho Nathana Bhai Rupa Lehra Mohabbat Vikram Cement Balianwala B.C 66 kv Bus Bars T1, 100 MVA, 220kV/66 kv 85 MW Lehra Mohabbat Island of 480 MW (Local Load170 MW PADDY & 130 MW NON PADDY) At Mansa end To be disabled in non- paddy season Mansa 1 Mansa 2 Himmatpura Himmatpura MW 67.5 MW PSTCL, Barnala 55 MW T2, 100 MVA, 220kV/66 Kv 85 MW BTI Thermal 1 Bajakhana 1 Bajakhana 2 BTI Thermal 2 60 MW 60 MW BBMB, Barnala B.C 220 kv Bus Bars B.C v

35 Bhadaur Bilaspur Patto Hira Singh Dina Sahib Tallewal 66/11 kv T-2 Re-close Re-close 66 kv Bus Bars Re-close 66 kv Lines will re-close () at 51.0 Hz- Reclosing load to be 4 to 5 MW 66 KV lines will trip after delay at T1, 100 MVA, 220kV/66 kv T3, 160 MVA, 220kV/66 kv Himmatpura (135 MW PADDY 55 MW NON PADDY) Lehra 1 Lehra 2 B.C 220 kv Bus Bars vi

36 12.5 MVA, 66 kv/11 kv 12.5 MVA, 66 kv/11 kv Maluka Jaito Bhagta Jeeda Bargari 66 kv Bus Bar T1, 100 MVA, 220kV/66 kv T2, 100 MVA, 220kV/66 kv Bajakhana (120 MW PADDY 56 MW NON PADDY) GHTP 1 GHTP 2 Mukatsar Moga 220 kv Bus Bar vii

37 66/11 kv T-4 66/11 kv T-5 Varindra Dhanaula-1 Dhanaula-2 Thuliwal UFR Hz Abhishek Malwa Barnala B.C at 66 kv Bus Bars T1, 100 MVA, 220kV/66 kv PSTCL, Barnala (190 MW= NET 55 MW PADDY & 40 MW NP) At Malerkotla end T2, 100 MVA, 220kV/66 kv T1, 100 MVA, 220kV/66 kv Pakhoke Dhaula UFR Hz Tapa Malerkotla 1 Malerkotla 2 BBMB, Barnala Along with PSTCL bus sectionalizing 220 KV breaker B.C 220 kv Bus Bars viii

38 Budhlada Ckt-1 Budhlada Ckt-2 Joga Dhalewan Bhikhi Maur 66/11 kv T-3 66/11 kv T-4 66 kv Bus Bars T1, 100 MVA, 220kV/66 kv T5, 100 MVA, 220kV/66 kv Mansa (125 MW Non Paddy load Only) T2, 100 MVA, 220kV/66 kv Relays to be disabled In non paddy season Jhunir Refinery Ckt. 1 Refinery Ckt. 2 Lehra 1 Lehra 2 Sunam B.C 220 kv Bus Bars ix

39 Mansa Sunam 220 kv Bus Bar JHUNIR 75 MW NON PADDY LOAD 100 MVA, 220 kv/66 kv 66 kv Bus Bars B.C Sardulgarh Aalike 66 KV Mansa 20 MVA Power T/F x

40 CHAPTER PROPOSED ACTION PLAN FOR SUCCESSFUL IMPLEMENTATION AND SURVIVAL OF ISLANLANDING SCHEME The islanding scheme is designed for a typical load-generation balance under summer and winter load scenario. However, considering system dynamics and actual load conditions, it creates un-certainties in the survival of the islands. Initially the islanding scheme as discussed in Chapter-5 can be implemented with the deployment of frequency sensing relays but additional measures would be required over a period of time to enhance success rate of islanding scheme. The following steps are proposed to be taken to enhance probability of success & survival of islanding scheme:- 6.1 Deployment of Numerical Relays. State of the art Numerical relays (Under frequency cum df/dt) shall be provided at the identified locations, which shall have faster response time. The existing static UFR & df/dt relays at the Island locations shall also be replaced with digital numerical relays. The relay shall be capable to integrate with existing/upcoming optical fiber communication network, under ULDC scheme. Detailed Technical specifications and Bill of Material is given as Annexure III & IV respectively. 6.2 Intelligent System for Load Shedding & Remote Monitoring. An intelligent system through existing or stand alone SCADA system will be implemented to continuously monitor the generation (including governor response of the generating units) and load at sub stations forming part of respective island (s), on real time basis and decision in the formation of island as well as during the restoration process. The intelligent system shall have central control and command centre at SLDC The system will necessarily require optical fiber based communication network. Such intelligent system would enhance the reliability of formation of islands. Detail status of connectivity & RTUs installed at Substations is given as per Annexure-V. Till such time the above intelligent system is developed, the proposed scheme based on Numerical Relays shall be in place. 14

41 6.3 Network & Simulation Studies. To assess stability and re-validate the formation of proposed islands under different scenario, Dynamic network simulation studies and stability analysis would be required beforehand. The study would analyze degree of swings in the bus voltages, line flows and relative rotor angles, etc. The studies would also suggest any additional measures to be taken for enhancing success rate of islanding. Line network diagram of system showing boundary of islands is given as Annexure VI. 6.4 Regular preventive Maintenance. 6.5 In order to ensure reliability of the island, regular preventive maintenance of control switchgears, relays & protection system and governors at each of the generating units, as covered in the scheme, shall be carried out by the respective agencies. Additional Requirements: Any additional provision to meet with the functional requirements of the Scheme shall be incorporated during implementation stage. 6.6 Periodic Review of islanding scheme. The islanding scheme shall be reviewed periodically, at least once a year, by the SLDC in consultation with the utilities. Changes in system topology, loading conditions, generation/demand growth, etc shall be reviewed and necessary changes in the islanding scheme shall be made accordingly. 6.6 Training and mock drills The detailed procedures/instructions shall be developed and training shall be imparted to the System Operators at SLDC and other personnel involved at the sub stations and generating stations. A detailed mock drills shall be conducted regularly, at least once in a year. SLDC shall co-ordinate this activity with the utilities. 15

42 CHAPTER MAJOR CHALLENGES AND WAY FORWARD 7.1. The islanding scheme has been framed considering the current power scenario in summer /paddy and winter season. Whereas system is heavily loaded and most vulnerable to instability and grid disturbance during summer peak period ( June-Oct), the system is equally vulnerable during winter season particularly under foggy conditions ( Dec-Feb), as experienced in the past. To make the islanding scheme suitable for all possible power scenario through out the year and changes in the network, this shall require a regular review and re-adjustments Maintaining the island will require continuous actions to regain and thereafter maintain load generation balance in the respective islands. Since frequency excursion in islands are expected to fast paced, these actions will permanently be ensure automatically through time delay feature. 7.3 Presently RFGMO at the generation stations operates within limit of +/- 5%, as per the IEGC which is already built in the control system of generator/turbine. In case of wide range of variation of frequency control,under proposed islanding mode, one generating unit will have to be operated on frequency control mode, for which assistance of BHEL(OEM) is required. 7.4 Introducing time delay of 5 seconds in the frequency tripping of generating units included in the islands shall enhance success rate of islands. 7.5 Training and Mock Drills at SLDC, sub stations and Generating Stations to familiarize for handling real time situation during grid disturbance. 7.6 During the islanded operation of system, Punjab SLDC at Ablowal, Patiala will be the nodal agency who will have the overall responsibility of co-ordination & operation of the islanded systems with various agencies like generating/ distribution licensees (PSPCL/IPPs), BBMB and POWERGRID etc. Punjab SLDC will follow instructions issued by NRLDC. 16

43 ANEXURE III TECHNICAL SPECIFICATION OF UFRs : The broad technical specification of islanding relays for the proposed load shedding scheme is as under: a. Rating: The rated auxiliary voltage : 220V + 5% (D.C)., The rated system frequency: 50 Hz Nominal voltage : 110V (A.C). Phase-Phase from P.T s. b. Operating frequency range : 45 to 55 Hz in steps 0.1 Hz with accuracy + 10 mhz. c. Under Voltage block at 40% of P.T. Voltage. d. Recovery function: Frequency difference from set value 0.1 to 2.0 Hz. Resetting time 15 Sec. to 15 minutes. Accuracy + 1%. e. The relays should be immune to harmonics & transients. f. It should have feature to self monitor. It should also be possible to monitor the relay from remote. g. The relay should have at least 4 levels of settable under frequency levels. h. The relay should have at least 2 levels of settable over frequency levels. i. The relay should have three load shedding stages for df/dt function and each stage should have setting range of 0.1 to 3 Hz (incremental in steps of 0.1 Hz/Sec). j. The each output contact of relays shall be configurable based on frequency whether over and under frequency values. k. The relay shall be IEC Compliant and shall communicate with SCADA system located at a remote location through owner communication network through 2mbps Ethernet port. l. The relay shall have at least four (4) voltage inputs where PT can be connected directly without any additional interfacing equipment. m. The relay shall have at least 12 status input and 6 trip output contacts to trip at least 6 feeders & monitor Main & Tie CBs of these 6 feeders. The output contacts shall be wired to self reset heavy duty trip relays to trip Main & Tie 17

44 CBs & send direct trip command to remote end. Heavy duty trip relay shall have at least 8 contacts. n. The relay shall monitor the operation of circuit breaker through its auxiliary contacts. o. The accuracy of Frequency measurement shall be 1% or better. p. Suitable LED s for indications of Tripping, Alarm & Healthy condition. q. The relay shall have self-supervision function. r. The maximum operating time (including tripping time) should not exceed 50ms. s. If the relay or its LED s or contacts are programmable, they would be programmed by the firm according to PSTCL requirements / drawings before delivery. t. The relay shall be capable of fault recording which shall record all analogue and digital data wired to relay. u. The relay shall have time synchronising feature using SNTP and IRIG B both. v. 2 nos. under frequency relays from different makes are envisaged for each EHV station which will be connected to bus CVT/PT separately to have redundant relaying system. w. One spare contact of the U/F islanding relay/trip relay shall be wired to existing RTU /RMU in the substations of the Islanding scheme for intimation of Islanding commencement to RLDC/SLDC 18

45 Annexure IV BILL OF MATERIAL (UFRs) Name of Sub-station Relays M1 Relays S1 Total for each S/S GGSSTP, Ropar G-1 & G G G GNDTP IGC Bathinda Himmatpura Mansa Sahnewal Kohara Amloh Kharar BBMB, Barnala Bajakhana PSTCL, Barnala Jhunir Mohali, Malerkotla 2 2 Goraya, Jamsher 3 3 TOTAL M1 21 TOTAL M2 21 Total S1 18 Total S2 18 Net Total 78 20% extra 16 TOTAL 94 19

46 Annexure-VI Status of Connectivity & RTU availability at locations under Islanding Scheme S. No. Name of Sub-Station SCADA/RTU Availability Optical Fiber Connectivity Remarks Yes (C-DAC) Yes RTU under upgradation KV S/S GGSSTP KV S/S G-1 & G KV S/S G KV S/S G-3 No Approved KV S/S Amloh No Yes KV S/S Kharar No Approved KV S/S Kohara No No KV S/S Sahnewal KV S/S Jamsher KV S/S Goraya KV S/S GNDTP KV S/S GHTP KV IGC No No KV Maur No No KV Himmatpura No No KV Bajakhana No No KV Barnala KV Mansa KV Jhunir Yes (C-DAC) Yes (Areva) Yes Approved Yes (Areva) Yes (C-DAC) DFE make RTU already ordered DFE make RTU already ordered DFE make RTU already ordered DFE make RTU already ordered No Yes Yes RTU under upgradation No Yes (C-DAC) Yes (ABB) Yes Yes Yes (DFE) Yes (Areva) RTU under upgradation RTU under upgradation Under Commissioning Under Commissioning Yes No No No 20 Under Commissioning

47 3*66MW (NHPC) BAIRASIUL(HP) (PSEB) SHAHPUR KANDI JASSORE (HP) 6*60MW (BBMB) (HP) PONG (PSEB) RSD HIRA NAGAR (J&K) SARNA TIBBER DASUA MAJITHA F.G.Ch. KARTAR PUR (PSEB) WADALA GR. KHASA BALA CHAK VERPAL TO HAMIRPUR KANJLI (KPT) C.L.ASR K.S. MALLI 6*115MV (NHPC) SALAL(J&K) JAMMU KISHENPUR WAGOORA PAMORA(J&K) (J&K) U.PUR(J&K) (NHPC) (NHPC) (PGCIL) (PGCIL) (PGCIL) (PGCIL) KISHENPUR KANGRA KANGRA(HP) HAMIRPUR(HP) SHANAN PATHAN KOT SARNA BASSI CHOHAL MAMUN ASHP (GANGUWAL) MAJARA NAKKIAN JADLA GURDASPUR DHARIWAL BATALA HOSHIAR PUR MHP-1 MHP-2 MHP-3 MHP-4 (PSEB) (PSEB) (HPSEB) (PSEB) (PSEB) TO KARTARPUR DEHAR BHAKRA(R.B.) BHAKRA(L.B.) GANGU WAL DEHAR PANIPAT BHIWANI CHAMERA(HP) GANGUWAL AMBUJA R.T.P. TO JAGADHRY(HR.) TO DHULKOT(HR.) (BBMB) (BBMB) (BBMB) (BBMB) (BBMB) (BBMB) (BBMB) HAKIMA GATE WADALA GRANTHIAN KATHU NANGAL VERKA TANDA BHOG PUR SHRI HAR- GOBIND PUR JAINTI PUR P.COLONY C.L.ASR MALL MANDI (LOHARKA) (PAKHAR WALA) GT.ROAD ASR. NARAIN GARH VERPAL SAKATRI BAG (PGCIL) KARTARPUR(JAL) TARN TAARAN KISHAN PUR ALAWALPUR JANDIALA TANGRA EKAL GADDA BHIKHI WIND PATTI SULTANPUR RASHIANA (TARAN TARAN) PATTI KOTLA JUNGA (PGCIL) (PGCIL) RCF SCIENCE KHERA MANDIR KAPUR THALA CITY CHILDREN PARK BUTARI DERA BEAS KARTAR PUR DHILWAN JALANDHER-1 RAILWAY BUTARI ALGAON SULTAN PUR (RAILWAY) CHAHERU JAMSHER(JAL.-2) 1*250 MVA PATIALA FAGAN MAJRA 2*315 MVA 4X150MVA (PGCIL) BALA CHAK 2*315MW JALANDHAR-1 (BBMB) KOTLA ROPAR ASRON MAX INDIA DCM BILASPUR CHAMKAUR SAHIB SIHORA SAMSPURA RAILWAY KURALI GOBINDGARH-1 GOBINDGARH-2 AMLOH ROAD GOBINDGARH DORAHA GHULAL MES N.F.L. IGC ABOHAR BALUANA GIDARWAHA BADAL MAUR MUKTSAR(OLD) MUKTSAR SARAINAGA MUKTSAR (NEW) KOTKAPURA-1 KOTKAPURA-2 JALALA WAD GUBHAYA MALOUT MALOUT TO MANSA DHARAMKOT PANJ GARIAN BADHNI KALAN MOGA-2 GHOLIAN KALAN BAGHA PURANA FARID KOT SADIK BAJA KHANA BARNALA AJITWAL JAGRAON SADIK BOTIAN WALA MASTE WALA FEROZPUR MOGA(PGCIL) (BBMB) MOGA SMADH BHAI BAGHA PURANA MOGA 3*100 MVA 2*90 MVA KHARAR 6*210MV (PSEB) R.T.P. TO NALAGARH (H.P.) RAJPURA PATRAN RAILWAY DERABASSI LALRU MOHALI-II MOHALI MAJRA BAHADUR GARH FAGAN RAJLA ABLOWAL (PATIALA) KOHARA AMLOH SAHNEWAL RAILWAY BATHINDA 2*110MW 2*210 MW G.H.T.P. (PSEB) HIMAT PURA MANSA JHUNIR SUNAM DHURI BARNALA (PSEB) MALER KOTLA MALER KOTLA (PSEB) (PGCIL) (PGCIL) TO FAGAN MAJRA (NTPC) 2*315MVA MALER KOTLA TO DADRI SANGRUR (PGCIL) PAKHOWAL FZR.RD.LDH FEROZESHAH TALWANDI BHAI(KOT KROR) FEROZPUR LALTON KALAN LUDHIANA (PGCIL) HAMBRAN JAMALPUR DHANDARI KALAN 2*315MVA (PGCIL) LUDHIANA (BBMB) (BBMB) (PGCIL) MVA MAHILPUR NAWAN SHAHAR MAHILPUR BANGA PHAG WARA GOR AYA NUR MAHAL NAKODER URBAN ESTATE JAMALPUR SWADI KALAN SOSAN MOGA-1 (OLD) MOGA(NEW) 2*110MW(UNIT#1&2) BATHINDA(PSEB) TO MAUR (PSEB) H H H H H H H H H H H H H H H H H H H H H H T T T T 100 MVA 100 MVA 100 MVA 1*100 MVA 2* 100 MVA 3*100 MVA 2*100 MVA 2*315 MVA 100 MVA 2*90 MVA 100 MVA 2*100 MVA 2*100 MVA 3*100 MVA 2*100 MVA 100 MVA 100 MVA (0.4 SQ.") (BBMB) LINE NETWORK DIAGRAM FOR POWER SYSTEM OF PUNJAB 220KV LINE 765KV LINE 132KV LINE 400KV LINE RAILWAY IKOLAHA ISLAND-1 GGSSTP ISLAND-2 GNDTP & GHTP Annexure-VI

48 APPENDIX-I 22

49 23

50 24

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53 Appendix-IIIA ( Sh 1 of 4) Detail of Under Frequency Relays (UFR) installed at Grid Sub-Stations. Sr. Name of S/Station No. P&M Circle Amritsar KV Khassa 2 220KV Patti 3 220KV Fatehgarh Churian KV Wadala Granthian 220KV Tibber 220KV Kotli Surat Mali P&M Circle Jalandhar 7 132KV Banga 8 132KV Jadla 9 132KV Nawanshahar KV Kartarpur KV Kotla Janga KV Bhogpur KV Nakodar Name of Feeder 66KV Attari 66KV Chohla Sahib 66KV Sarhali 66KV Ajnala 66KV Ram Dass 66KV Jhander 66KV Wadala Veeram 66KV Udanwal 66KV Purana Shalla 66KV Shahpur Goraya 66KV Rehana Jattan, 66KV Behram 66KV Balachour & Kerawar line 66KV Aur & Rahon 66KV Nadala Hamira & Mustfapur 66KV Malsian Alewali, Shahkot, Malian & Cap, Bank 33KV Kandhala Jattan & 33KV Bholath 66KV Shanker. ( UFR relay is installed on 66KV Shanker feeder was shifted on 220KV Kotla Janga on 26/6/12) Load Relief in MVA MVA 70MVA 50MVA 45MVA 153.5MVA 34 MVA 32.5 MVA ` P&M Circle Patiala KV S/S Ablowal KV S/S Bahadurgarh 66KV Lung 66KV Ghanour KV Ropar 220KV S/S Patran 66KV Bahlolpur 66KV Moonak KV S/S Sunam 220KV S/S Dhuri 220KV S/S Barnala 220KV Malerkotla 66KV Chajli 66KV Cheema 66KV Kanjla 66KV Dhaula, Thuliwal KV Budhhlada ckt-i 66KV Budhhlada ckt-ii, 66KV Bhikhi line, 66KV Dhelwala line 32 MVA 32MVA 28.57MVA 28.57MVA P&M Circle Bathinda KV S/S Mansa KV S/S Botianwala KV S/S Ghubaya 220KV S/S Sadiq 100MVA T/F, 220/66KV I/C 66KV side 66KV Ladhuka 66KV I/C I&II MVA 92.5MVA 63.8MVA