Transmission System Bottlenecks & Planning for Mumbai Metropolitan Region

Transcription

1 Transmission System Bottlenecks & Planning for Mumbai Metropolitan Region TRANSMISSION GROUP MERC 5 th August 2011

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3 Actual Flows for Mumbai Peak FY12 ( 3209 MW) Tie Line Flows (Amp & MW) during Mumbai Peak FY 12 Generation: 1877 MW Tie Line Interchange: 1027 MW MSEDCL Wheeling Load: 195 MW Normal condition More than 50 % loading Critical Loading 1 Generation: 500 MW 3

4 Tripping of 220kV Kalwa Salsette line Tie Line Flows (Amp & MW) with one 220 KV Kalwa Salsette tripping (Peak FY 12) Generation: 1877 MW Tie Line Interchange: 1027 MW MSEDCL Wheeling Load: 195 MW MSETCL System: Kalwa Mulund and Kalwa Borivli lines are fully loaded Normal condition More than 50 % loading Critical Loading 2 Generation: 500 MW 4

5 Tripping of 220kV BO(T) BO(M) Line Tie Line Flows (Amp & MW) with TATA Bor-MSETCL Bor Line tripping (Peak FY 12) Generation: 1877 MW Tie Line Interchange: 1030 MW MSEDCL Wheeling Load: 195 MW Normal condition More than 50 % loading Critical Loading 3 Generation: 500 MW 5

6 Tripping of Trombay 500MW Unit Tie Line Flows (Amp & MW) considering contingency of 500 MW unit tripping (Peak FY 12) Generation: 1377 MW Generation: 1377 MW Tie Tie Line Interchange: MW MSEDCL Wheeling Load: 195 MW MSETCL System: Kalwa Mulund line is is Overloaded and Kalwa Borivli line is is fully loaded Normal condition More than 50 % loading Critical Loading 4 Generation: 500 MW 6

7 Observations & Remedial measures 220KV Bo(T) Bo(M) line out: Severe condition 220KV D/C Aarey Borivali lines out: simulation does not converge: Mumbai System may not survive. Shifting Aarey S/S load to TPCL S/S to be explored to relieve 220KVAarey Borivali line loading. High reliability Special Protection Schemes (SPS) for automatic LS, be commissioned to avoid cascade tripping. Feasibility of HVDC /Series compensation/svc for 220KV lines DSM/EE by consumers: Pilot Schemes Feasibility of Barge based Generation (250/300MW) to feed North Mumbai Running of TPC Trombay U 4 with additional gas allocation (130 MW) for Mumbai

8 MERC Approved schemes for strengthening of Mumbai Metropolitan Region Sr. No. Utilities Total No. of Schemes Approved Total Estimated Cost (in Rs Cr) 1 TPC T R Infra T MSETCL Total

9 TPC T Sr. No. Scheme Approv ed Cost Rs Cr Approval by MERC Estimated Date of Completion REMARKS kv Trombay Dharavi Salsette Lines 153 May 2007 March 10 Commissioning of line sections in Godrej area and Somaiya plot completed & line section charged Bottlenecks: Permissions from CRZ,Forest Department, Mangrove area. Relocation of hutment dwellers. ROW: Private societies kV GIS RS at Mahalaxmi March 11 Orders for major equipment's like GIS, ICT & Protection panels placed. Bottlenecks: Pending approval of Building Plan with MCGM. 9

10 3 220 kv GIS at SAKI & Upgrading of Transmission lines Dec 2007 March 2010 TPC T Progress: A)GIS: Construction of GIS building : December Balance S/s civil jobs have been completed. Major Equipment Ordered B)220Kv Transmission Line: Out of 28 towers, 10 completed. Construction of terminating arrangement for 220kV line taken up. Bottlenecks: Relocation of Project affected persons kV interconnectio n with MSETCL at Borivali 19.5 June 2007 March 2009 Installation of towers &stringing of conductors completed. 220 kv cable section at GIS end energized. One bay equipment has been commissioned 1st line has been taken in service in Aug nd line is charged from Borivali in April 2011 Gantry for 1 Tower completed and for 2nd Tower in progress. Bottlenecks: Statutory permission for removal of trees for construction of bays /towers delayed. Due to restriction on working hours & movement of trucks imposed by Sanjay Gandhi National Park Authorities, the jobs are in progress at slower pace. 10

11 TPC T kv Backbay Ring System August 2008 March 12 Progress: 220 KV Cable trenching & laying WIP 110Kv Cable diversion at Backbay WIP Bottlenecks: Permission from MCGM, MBPT for cable laying and permissions from CRZ,Forest department, Wigh court for working in mangrove area for erecting overhead lines. 6 Installations of 145 KV GIS at Chembur/ Worli/ Bombay Dying Wadala/ HDIL Kurla/ Mankhurd March 13 Environmental Clearance at Chembur Work to be started Possession of plot to be obtained from SRA 11

12 TPC T 7 400/220/33 kv GIS at Vikhroli June 2011 March 13 Progress: negotiations for land acquisition under progress. Bottleneck: Land Acquisition kv Kalwa Salsette third line between MSETCL (KALWA) & TATA Power Salsette R/S with line bays at both the ends June 2007 April 13 Bottle Necks: Permission from CRZ, Forest Department, High court for working in Mangrove area. Permissions from private societies and land owners. 12

13 R Infra T Sr. No. Scheme name Approved Cost by Comission MERC Approval Commissioni ng as per DPR Transmission bottlenecks/ Remarks 1 220KV GIS Chembur 220 Aug 2007 Mar Progressive CC stalled by MCGM Civil work is stopped at Chembur MMRDA permission required 2 220kV GIS at Saki EHV Station Jun e2008 March 2011 Station charged Delay in outages of desired lines during commissioning Heavy monsoon: civil activity As per new norms works could not be taken at night times kV GIS Borivali July 2008 March 2011 Forest clearance for cable from Sanjay Gandhi National park

14 4 220kV Nagari Niwara R Infra T Jan 2008 March 2015 Land acquisition is in process 5 220kV Goregaon EHV station Jan 2008 March 2010 Station charged Heavy monsoon delayed civil activity Non availability of river sand stalled civil works ias per new norms works could not be taken at night times. 6 LILO existing MSETCL Boisar Borivali 220 kv line at Ghodbunder EHV Stn Apr 2010 March 2012 LILO tower erected 220kV cable laying work is in full swing. ROW issues

15 MSETCL Approve Commiss Sr MERC Schemes d cost in ioning.no approval Rs Cr date as per DPR 1 400/220/33 KV Kharghar S/S May, 2007 March 2 (Pl go to next slide) 1)LILO on 220 KV Kharghar Kalwa at Nerul 2)LILO on 220 KV Kharghar Kalwa at Tiffil 3)220 KV M/C line on narrow base M/C towers from LILO point near Nerul to Trombay s/s 4) LILO on 220KV Kalwa Borivali M/C line at Mulund s/s 5) LILO on 220 KV Borivali Boisar M/C line at Tarapur 6)LILO on 220 KV Mulund Borivali line at Bhandup GIS 7)LILO on 220 KV Kharghar Kalwa M/C line at Siemens March, March Installation of addl. 4 x 167 MVA, 400/220/33 kv ICT & Replacement of 3 x 200 MVA, 400/220/33 kv ICT by 3 x 167 MVA, 400/220/33 kv ICT at 400 kv Kalwa Substation March, 2009 March

16 Network Augmentation: MSETCL Conversion of 220 kv Kharghar Kalwa Borivali Boisar D/c line with New Twin Moose Conductor 16

17 MSETCL 4 1. LILO on220kv Mulund Borivali feeder II at Bhandup S/S Dec 2008 March /22 kv Sub Station in Bhiwandi IV,, LILO on 220KV Kalwa Padghe Augmentation of 400 kv Kharghar S/S and Six other EHV S/S (4x167 MVA Xmers ) 1) 220 kv Kharghar Kalwa M/C Line on M/C Narrow base towers 2) 220 kv Kalwa Mulund Borivali M/C Line on M/C Narrow base towers 3) 220 kv Borivali Boisar II M/C Line on M/C Narrow base towers 4) Dismantling of existing D/C on D/C tower line a) 220 kv Kharghar Kalwa Line 26.0 Km b) 220 kv Kalwa Borivali Line 17.0 Km c) 220 kv Borivali Boisar II Line 87.0 Km Dec 2009 March Dec 2009 March Nov 2010 March

18 On going Projects to be completed on Top Priority MSETCL/PGCIL: 220KV M/C Kharghar Kalwa Borivali Boisar line 220KV S/S Bhandup/Bhiwandi (to relive loading on TPC system) 400/220KV S/s at Panvel by PGCIL (connecting to 400KV Vikroli) R Infra LILO of 220KV Borivali Boisar line at Ghodbundar S/s 220KV S/s at Chembur, Borivali, Goregaon, Nagar Niwara Commissioning of 3 rd 220KV Kalwa Salsette line TPC: 2 nd 220KV Bo(T) BO(M) line 220KV Trombay Salsette 3 rd Circuit 220KV Trombay Dharavi Backbay 3 rd Circuit 220KV Trombay Saki & Salsette Saki lines

19 For faster completion of on going Transmission projects Issues to be sorted with other Authorities: ROW Mangroves CRZ Forest Hutment dwellers MCGM permission Private land.

20 Finally Existing Mumbai network is very Fragile. Network Strengthening: to be taken up on top priority. Progress of already approved scheme to be regularly monitored by STU. Improvements for (n 1) compliance as suggested in Dr Khaparde Report needs carried out on priority. Investigate feasibility of the 220 kv D/C Trombay (TPCL) Saki (R Infra) for relieving existing system from critical loading, during peak conditions. Connectivity at 400 kv between Vikhroli (TPCL) and Ghodbunder (R Infra) needs to be checked.

21 Thank You M: