Island operation. tel

Transcription

1 Island operation Speakers: Vlastimil Novotný EZ Distribuce, a.s., František Žák EGE, spol. s r.o. Contact : vlastimil.novotny@cezdistribuce.cz tel zak@ege.cz 1

2 Progress of the pilot project Smart Region Vrchlabí V. Novotný, EZ Distribuce, a.s.,

3 Current state Fast charging station LV automation charging station 35 kv substation Functions of Smart Region multifunctionalhouse CHP unit

4 Project goals Automated solutions for failures in LV network Automated solutions for failures in MV network Automated controlled island operation

5 Island operation Number of DTS: 7 Length of LV cables: 26 km Length of MV cables: 3,9 km Number of customers: General Assembly, Madrid, Nov. 5 28th 2012

6 Big outages March 1999: The collapse hit the electrical grid in south Brazil, from 75 to 97 mil. people were affected by outage for 5 hours. At that time, it was the largest recorded outage. August 2003: 55 millionpeople were affected by outage for two days on the northeast coast of USA and Canada. Outages repeated few times in smaller extent. USA invested a lot of money to the transmission line since that time. September 2003: 56 million people were affected by blackout in Italy for 18 hours. A part of Switzerland was affected by this blackout for few hours as well. July 2004: A month before beginning of the summer Olympic games in Athens blackout affected 7 million people in Greece. Besides other things, network congestion due to use of air conditioning is given as a reason. August 2005: Around 100 million people felt massive blackout on the Indonesian islands Java and Bali. It lasted several hours. September 2011: Extensive outage hit California. Almost 7 million people were without electrical energy for 12 hours. Speculations that it is related to 10 year anniversary of terrorist attacks from 11th of September 2011 were not confirmed. July 2012: The blackout hit 670 million people in India. That is 9 % of the entire population of the planet - more than there are in entire European Union. This blackout is considered as the largest mass outage in history. For the second most populous country in the world it was probably not the last one, local outdated infrastructure does not handle requirements of a rapidly growing Indian economy. February 2014: Unusually cold weather with heavy fall of snow destroyed thousand kilometres of electrical networks in Slovenia. It caused several days outage that affected more than households. 6

7 Short-term island operation Island operation Synchronous connection Local grid Electric power system ES G Frequency f Affected by actual active power supply P and its consumption Voltage U Affected by reactive power Q ( U,f SN EN )

8 year BC [GWh] SC Enterprisers [GWh] Househ. [GWh] GDP [bil. K ] Production [K /kwh] Production recalculated to prices in 2013 [K /kwh] ,0 8062, ,8 3352,6 78,60 94, ,1 8470, ,9 3848,4 86,99 95, , ,5 3790,8 88,90 94, ,8 8100, ,7 3845,9 90,04 91, ,2 8172, ,5 3883,7 91,8 91,77 Source: ERÚ - consumption Source: SÚ - HDP

9 Inflation rate in R 7 6 Inflation rate in R (%) 6,3 5 (source: SÚ) 4 3 1, ,5 2,8 1 1,5 1,9 3,3 1, ,7 Inflation rate in R (%) 5 4 3,6 (source: , ,3 2,4 2,4 1,

10 Island operation Accidental Controlled

11 CONTROLLED ISLAND OPETATION

12 ISLAND OPERATION Higher reliability of power supply - Reduction of consequential losses in case of power cut - Reduction of outages of local sources - Ensuring of infrastructure operation - Ensuring of sales for electrical energy

13 EGE s share on implementation of island operation in Smart region Vrchlabí Study Suggested solution for island operation Determination of conditions to successfully manage the project Consultation with subcontractor Troubleshooting during implementation Implementation of control of island operation The supply is controlled by island operation controller AOP Connection of subsystems Island operation tests controlling 13

14 Network analysis Study of island operation Review of suitability of network Recommendations for equipment and important network s points control Analysis of connected customers Analysis of character of load Suggestion for variable load elimination Determination of the management of consumption Suggestion for island operation solution Suggestion for integration of subsystems to island operation 14

15 Measuring of island operation of network Small customers area flats and houses Summer measurement: from at 10:21 to :10 Winter measurement: from to on DTS 5663 to on TS 35kV /10 kv

16 Active power daily load diagram SUMMER

17 Winter measurement: 1st part Christmas, winter holidays From to

18 Active power load diagram

19 Active power load diagram

20 Winter measurement: 2nd part from to

21 Active power load diagram

22 Duration of load changes dp/dt [kw/s] Additional measures necessary In possibilities of power supply - Additional measures recommended In possibilities of power supply %

23 Customers in low voltage network according to circuit breaker s value

24 PROJECT: ISLAND OPERATION Conection of systems AOP IO control Protection Measurement and data processing Communication Monitoring Control of networks Monitoring Communication Remote control Measurement and data processing DTS 10 kv/0,4 kv (35 kv/0,4 kv) Power supply: CHP unit (1,6 MW) Reserve power supply Communication Protection Remote control Measurement and data processing Reserve power supply Protection Heat and water management Communication Control of supply Gas management 24

25 ISLAND OPERATION in a part of urban network Smart region Vrchlabí 25

26 Why in the city district? Ensuring infrastructure Higher reliability of power supply even in special states (calamities, terrorist attacks, ) Why in small unimportant city district? Small area equipped with necessary technology Suitable power supply installed Expected benefit: Ensuring power supply during disturbances in ES or on supply Testing new technologies Troubleshooting during construction, test results and service experience can derive the necessary prerequisite for the realization of large IO in urban agglomerations 26

27 Island operation in 10 kv network 27

28 Dividing point I. G DTS 0643 DTS 0648 DTS 1435 DTS 1030 DTS 1283 DTS 1283 DTS 1283 Island operation area Dividing point II.

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31 Information display Remote controlled circuit breakers for up to 12 low voltage feeders in DTS Control: - Control room - AOP 31

32 IO controller AOP BA G Device for elimination of swift load changes and for stabilization of power supply operation

33 Power supply: CHP unit 1600 kw 33

34 Control cabinet of CHP unit Control of IO - AOP 34

35 Possibility of emergency control secured by key 35

36 Controller AOP SW Measurements Communication IEC for IO area IEC control room (IEC LV weak ties) MODBUS CHP unit Direct control of CHP Direct control of elimination of load changes 36

37 Emergency power supply for black start 37

38 Urban substation 10 kv Basic IO setting AOP G During IO - Change of protection settings Protections

39 1st stage of tests Without affecting customers Tests of AOP, simulation of operating conditions Tests of power supply 39

40 DISCONNECTED AOP BA Controlling of power supply G 10 kv network Boiler house

41 Disconnection from network Command to turn on additional load (AL) Maximum frequency level 1000 kw Additional load turned on 216 kw+45 kw 41

42 Disconnection from network Command to turn on additional load Additional load turned on 42

43 Tests of reaction times: Disconnection from netw.: 13:49:58,96967 Command to turn on AL: 13:49:59,02323 Additional load turned on: 13:49:59,03394 t 66,5 ms 10,71 ms 77,21 ms Result: reaction time AOP from 55 ms to 85 ms time for turning on AL from 9 ms to 15 ms time for turning off AL from 15 ms to 25 ms 43

44 2nd stage of tests Test of real island operation Black start of island operation 44

45 Dividing point Automatic start of IO AOP - controlled by AOP DTS 0643 DTS 0648 DTS 1435 DTS 1030 G 1st Initial step state - Dividing - IO area the without area power of IO - Power supply turned off DTS 1283 DTS 1283 DTS 1283 Area of island operation Dividing point

46 Automatic start of IO - controlled by AOP G DTS 0643 DTS 0648 DTS 1435 DTS nd step - Disconnection of feeders in DTS DTS 1283 DTS 1283 DTS 1283 Area of island operation

47 G DTS 0643 DTS 0648 DTS 1435 DTS rd step - Start of power supply DTS 1283 DTS 1283 DTS 1283 Area of island operation

48 ISLAND OPERATION G DTS 0643 DTS 0648 DTS 1435 DTS 1030 Consumption: 300 kw to 1200 kw 4th 5th 6th step - Turning on the LV feeders MV generator network in DTS - sequentially DTS 1283 DTS 1283 DTS 1283 Area of island operation

49 Measurement at the power supply Turning on the power supply to LV network Turning on the AL stabilisation part Turning on the AL damping part 49

50 Measurement at the power supply Turning on the MV network - current impulse Turning on the AL stabilisation part Repeated turning on the AL damping part 50

51 Measurement in MV network 10 kv Frequency drop caused by current impulse Frequency rise after current impulse 51

52 Turning on the power supply to LV network Turning on the power supply to MV network Turning on feeders in DTS Stabilization of power supply operation Stabilisation of power supply operation 52

53 Voltage and frequency changes caused by turning on the LV feeders 53

54 Time course of voltage, currents and frequency in LV network at the power supply output 54

55 Time course of voltage and currents in LV network at the power supply output Automatic disconnection of power supply from the network end of IO Ending IO to darkness Decrease of load - Turning off the stabilization load 55

56 2nd stage of tests Test of real island operation Switch from synchronous connection of power supply to IO 56

57 ISLAND OPERATION AOP G DTS 0643 DTS 0648 DTS 1435 P W DTS 1030 Consumption: 300 kw to 1200 kw DTS 1283 DTS 1283 DTS 1283 Area of island operation

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59 t = 84,36 ms 59

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62 2nd stage of tests Test of real island operation Automatic connection of area of IO to the network - without synchronization 62

63 ISLAND OPERATION AOP U = 0 G DTS 0643 DTS 0648 DTS 1435 P W Stop DTS 1030 Consumption: 300 kw to 1200 kw Power supply control DTS 1283 DTS 1283 DTS 1283 Area of island operation

64 The moment of disconnection of power supply The moment of restoration of voltage from network 64

65 Disconnection of the additional load Disconnection of the power supply from the network Restoration of voltage in network after turning on the dividing point Current of selfconsumption of power supply 65

66 After tests Results 66

67 Goals to create island operation Boiler house el.energy G heat gas 1. Ensuring power supply 2. Ensuring heat supply 3. Verification of possibility of island operation creation Disadvantage: dependence on gas supply

68 Other activities Modernization of urban substation Change from 10 kv to 35 kv network Test of synchronization of area of IO with the network 68

69 U,f U,f SYN AOP 5201 du; df phase IEC G MODBUS+ DIRECT CONTROL du;df Power supply control ISLAND SYNCHRONOUS OPERATION CONNECTION

70 Results The possibility to create IO based on current technology was verified in practice Economic importance for product sector Ensuring infrastructure function Big importance for households during calamities and longterm outages 70

71 Thank you for your attention Please your questions