关键词: 串联补偿, 控制保护, MOV, 火花间隙, 失灵联跳

Abstract:

In terms of series compensation reform project of Fengwan 500kV double circuit extra-high voltage line, brief introduction was made to series compensation theory and the functions of all series compensated elements, and the reform object and achievements pointed out. In order to verify the correctness of home-made device action logic and control system, parametric modeling is made for series compensated capacitor bank, metal oxide voltage limiter(MOV), spark gap, damping circuit, bypass switch, knife switch, etc. on the basis of the brief introduction of their functions; and based on the actual operation method of series compensation, an equivalent system was established which has the same contact method with the on-site system and RTDS dynamic simulation of series compensation control and protection system was made to verify to the action of protections outside of the line area such as metallic fault, transition resistance fault, developing fault, energy protection, capacitor imbalance, etc. In combination of typical 3/2 wiring method, emphasis was put on the secondary coordination and logic relation between series compensation and conventional protection, the theory and method for malfunction and shunt tripping pointed out, and reasonable operation recommendations put forward based on on-site practice and simulation analysis.

Key words: Series compensation, control and protection, MOV, GAP, failure triggering relevant trips