Distribution Feeder. Nazar Dhahir Sr. Transmission Engineer Tucson Electric Power Co. RMEL Distribution Conference March 11, 2010

Transcription

1 Distribution Feeder utomation ti Nazar Dhahir Sr. Transmission Engineer Tucson Electric Power Co. RMEL Distribution Conference March 11, 2010

2 IntelliTEM Team synchronization members share data Switches communicate with each other before closing Doesn t require master station for circuit reconfiguration uto return to Normal Feature uto Load Transfer Capabilities SCD Control Feature

3 Each control decides when to: Open a dead line on count of over current trips Open a dead d line on count of loss of voltage Open a dead line on extended voltage loss time delay Open under load for phase loss protection (single phasing)

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5 IntelliTEM II 3 Member Scada- Mate IntelliTEM II Revolutionary Distributed Intelligence uto Reconfiguration System

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8 IntelliTEM Theory Types of Team Operation Loss of voltage Fault Loss of a phase

9 N.O.

10 Normal Circuit it Configuration NO N.O.

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12 Fault NO N.O.

13 - trips open --- FC = 1 N.O. - Switches 1 & 2 senses loss of voltage < set point value - Starts Sectionalizer reset and extended voltage loss time Timer - Set internal counter of recloser operation to 1 (FC = 1) - Prior over current within 36 cycles (Y/N) Y Load side fault - No prior over current (Y/N) N Source side fault

14 Recloses ---- N.O. - closes and holds - over current < Set point value - Successful Reclose timer expires - sectionalizing timer reset and sectionalizing canceled

15 trips gain FC = 2 N.O. sensed voltage < set point value - sensed voltage < set point value - over current detected - Control adds one count for each breaker trip. - Counter is incremented by 1 FC = 2

16 Switches 1 & 2 now open N.O. - FC count reaches a threshold value of 2 both switches (1 & 2) will open before recloses

17 () recloses and hold NO N.O.

18 recloses and hold N.O. Control at Switch 1 will communicate with Switch 2 before closing

19 N.O. - If Fault Cleared, Switch #2 is closed Manually and system returns to normal operation

20 Fault between Switches 1 & 2 N.O.

21 opens ---- FC =1 N.O.

22 recloses into the fault NO N.O.

23 opens ---- FC = 2 NO N.O.

24 opens ---- FC = 2 N.O. Switch 1 & 2 opens before breaker closes

25 is re-energized N.O. Switch # 3: 1- Detect loss of voltage on one side 2- Switch # 2 is open 3- Check transfer capability (Load on #2)

26 Switch # 3: - Detect loss of voltage on one side - Switch # 2 is open - Check transfer capability of alternate feeder

27 Fault is removed: 1- Switch # 1 is closed 2- Switch # 2 is Closed 3- Switch # 3 is closed

28 N.O. Fault is removed: 1- Switch # 1 is closed 2- Switch # 2 is Closed 3- Switch # 3 is open

29 Fault N.O. Fault between Switch #1 and substation

30 Fault N.O. trips open: Switch #1 & #2 observe loss of voltage and increment their Loss of voltage counter by 1 ===> VC = 1

31 Fault N.O. Recloses into the fault

32 Fault N.O. trips open: Switch #1 & #2 observe loss of voltage and increment their Loss of voltage counter by 1===> VC = 2

33 Fault N.O. S # & # C f Switch #1 & #2 reaches their VC threshold value and open before recloses. will go through its shots to lock out

34 Fault Switch h#3 observe 1) Loss of voltage on one side 2) Switch #2 is open 3) Check transfer Capabilities of alternate t feed

35 Fault Switch h#2c Communicate with ith#1

36 Fault cleared closes and hold

37 Fault cleared closes and hold Switch # 1 closes

38 Fault cleared closes and hold N.O. Switch # 3 opens and circuit returns to normal

39 ny Questions!!