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A study on determination of interface flow limits in the KEPCO system using modified continuation power flow (MCPF)

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6 Author(s)
Byongjun Lee ; Dept. of Electr. Eng., Korea Univ., Seoul, South Korea ; Hwachang Song ; Sae-Hyuk Kwon ; Gilsoo Jang
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This paper reports a study on determining steady. state voltage stability limit of interface flow on a set of interface lines between the metropolitan region and the neighboring regions in the Korea Electric Power Corporation (KEPCO). The interface flow limit considering severe contingencies is determined with a concept of interface flow margin, which is the active power flow margin of the key transmission lines between one region and others under a fixed load demand condition. The paper proposes a procedure to determine secure limit of active power flow on a set of specified interface lines. The procedure uses the modified continuation power flow (MCPF) tracing a path of power flow solutions with respect to generation shift to vary interface flow. In simulation, voltage stability limits of the metropolitan interface flow of the KEPCO'98 system are determined.

Published in:

IEEE Transactions on Power Systems  (Volume:17 ,  Issue: 3 )