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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.

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