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PEC 500 kV Limit on Import Capability l Impact on phase angle w Additional 500 kV ties w Operating procedures w A Series device l Delta P studies.

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Presentation on theme: "PEC 500 kV Limit on Import Capability l Impact on phase angle w Additional 500 kV ties w Operating procedures w A Series device l Delta P studies."— Presentation transcript:

1 PEC 500 kV Limit on Import Capability l Impact on phase angle w Additional 500 kV ties w Operating procedures w A Series device l Delta P studies

2 Impact of 500 kV Tie Lines CPLE 2010 SummerAngle Diff (NP - RICH) Area 140 Net Interchange :4603MW (w/Duke 1000MW)TRM OnlyTRM+1000 No line is added, open Rich - NP31.8636.96 Add Person - Clover 500kV line, open Rich-NP* 36.30 Add Durham-Pardwood 500kV line,open Rich-NP29.7634.11 Add Person - Axton 500kV line, open Rich-NP * 33.96 Add Durham - Axton 500kV line, open Rich-NP * 32.82 Add Person - Axton, Durham - Axton 500kV lines, open Rich-NP * 32.24 Add Rich - Pleasant Garden 500kV line,open Rich-NP25.1027.94 Add Person - Axton, Rich - P Garden 500kV lines, open Rich-NP23.2725.83 Newport - Cumberland 500 kV18.5221.43 Newport - Cumberland 500 kV, Loop into Rich13.4815.37

3 Example Delta P Richmond CT, 0.355 pu

4 Operating Procedure Isolate generation from 500 at Richmond 500 - 0.15 pu Xfrmr#1 Switched OUT Xfrmr#2 Switched OUT Xfrmr#1 Switched back IN Xfrmr#2 Switched back IN 500kV Line Switched CLOSED Brunswick #2 Max Delta_P of 0.068 pu Richmond CT#1 Max Delta_P of 0.15 pu

5 Operating Procedure Restore 500kV Path via Cumberland Terminal- 0.415 pu ~240 MW 0.066 pu ~1100 MW ~800 MW ~1400 MW 0.415 pu 0.130 pu in opposite direction Switch OUT Cumberland Line Switch IN Newport Line Switch IN Cumberland Line

6 Example of Series Reactor Line Closed with Reactor in series with line Reactor bypass switch closed, removing series reactor Original Delta P, reduced to two smaller Delta P’s

7 Opening vs. Closing Richmond CT l Closing DeltaP 0.355 pu l Opening DeltaP 0.307 pu


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