THE 77kV 40MVA MULTI-FUNCTION SVC (STATIC VAR COMPENSATOR) INSTALLED IN SUBSTATIONS

Abstract The 77kV 40MVA multi-function SVC was installed at Hirakata Substation of Kansai Electric Power Co., Ltd. in June, 1988. Since then the SVC has been operated successfully. The SVC has been equipped with the following functions to meet its requirements: 1. Voltage regulative function (AVR function). 2. Voltage fluctuation suppression function. 3. Coordinated operative function with rotary condensa unit. 4. Voltage suppresion function when shunt reactor is opened/closed. In the studies of these required functions, on-the-desk simulation by means of computer and on-the-site simulation were conducted to confirm the response speed, effect, etc. Since the SVC is installed in the substation, special attention has been paid to the improvement of reliability and low noise execution. This paper mainly describes a simulation by computer and confirmation test on the effect of installation of SVC. This paper also introduces new technologies of the component units including a light-triggered type thyristor equipment, 77kV dead-tank type fixed filter, etc.