피상전력 손실감도에 의한 전압붕괴 근접도 지표와 무효전력 투자

Voltage collapse proximity index based on system apparent power loss sensitivity and its application to VAR investment

  • 이상중 (한국전력공사 전력연구원 전력연구실) ;
  • 김건중 (충남대 공대 전기공학과) ;
  • 김원겸 (충남대 대학원 전기공학과) ;
  • 김용배 (충남대 대학원 전기공학과) ;
  • 엄재선 (충남대 대학원 전기공학과)
  • 발행 : 1995.10.01

초록

In this paper, a new voltage collapse proximity index (VCPI) based on system apparent power loss sensitivity is proposed. The newly proposed index .lambda.$^{Sloss}$ reaches -.inf. at system voltage collapse point and can be represented by .root..lambda.$^{Ploss}$$^{2}$+.lambda.$^{Qloss}$$^{2}$ where .lambda.$^{Ploss}$ and .lambda.$^{Qloss}$ are the VCPI based on the system active and reactive power loss sensitivity respectively. These indices can be used for the system VAR investment. .DELTA.Q [VAR] is invested, step by step, by the priority of the VCPI index given for each bus. The indices use information from normal power flow equations and their Jacobians. Computation time for deriving .lambda.$^{Sloss}$ is almost same as that for power flow calculation. Two case studies prove the effectiveness of the .lambda.$^{Sloss}$ index and the VAR investment algorithm proposed.

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