Cooperation Algorithms of LTC and SC for Distribution Volt/Var Regulation

배전계통 전압/무효전력 보상을 위한 LTC변압기와 SC의 협조운전 알고리즘

  • 최준호 (전남대학교 전기공학과) ;
  • 김재철 (숭실대학교 전기제어시스템공학부) ;
  • 남해곤 (전남대학교 전기공학과) ;
  • 문승일 (서울대학교 전기컴퓨터공학부)
  • Published : 2003.07.21

Abstract

In this paper, the on line volt/var control algorithms of the food Load Tap Changer (LTC) transformer and Shunt Capacitor(SC) are proposed for distribution volt/var regulation. In the existing volt/var control of the distribution substation, the voltage of feeders and var of distribution systems is mainly controlled by the LTC transformer tap position and on/off status of the shunt capacitor. The LTC and shunt capacitor bank has discrete operation characteristics and therefore it is very difficult to control volt/var at the distribution networks within the satisfactory levels. Also there is limitation of the operation times of the LTC and shunt capacitor bank because it is affects on their functional lifetime. The proposed volt/var control algorithm determine an optimal tap position of LTC and on/off status of shunt capacitors at a distribution network with the multiple feeders. The mathematical equations of the proposed method are introduced. Simple case study was performed to verify the effectiveness of the proposed method.

Keywords