丰万500kV超高压线路串联补偿装置的保护和控制改造

Reform Study on Protection and Control of Fengwan 500kV Supervoltage Line Series Compensation Equipment

针对500k V丰万双回超高压输电线路的串联补偿改造工程,对串联补偿原理和各串补元件功能进行简要介绍,指出改造的目的和成果。为验证国产化装置动作逻辑和控制系统的正确性,对电容器组、金属氧化物限压器MOV、火花间隙GAP、阻尼回路、旁路开关以及刀开关等串补装置在简述其功能的基础上进行参数建模,并根据串联补偿实际运行方式,搭建与现场系统联络方式一致的等值系统,对串联补偿控制保护系统进行RTDS动态仿真,验证线路区内外金属性故障、经过渡电阻、发展性故障、能量保护和电容器不平衡等保护的动作行为。结合典型的3/2接线方式,着重探讨串补与常规保护之间的二次配合和逻辑关系,指出失灵联跳的原理和方式,并根据现场实践和仿真分析给出合理的运行建议。

In terms of series compensation reform project of Fengwan 500 kV 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.