750kV可控高抗应用中需注意的问题及对策

Notable Issues in Application of 750 kV Controllable Shunt Reactors and Countermeasures

可控高压并联电抗器(简称可控高抗)可以起到限制过电压和协调无功平衡的作用,有助于提高系统稳定性和运行经济性,在国内外超高压及特高压电网中均有较好的应用前景。以国内规划建设的拟采用同塔双回紧凑型输电技术的某750kV输变电工程为例,分析了装设可控高抗对系统工频过电压、甩负荷操作过电压、潜供电流和恢复电压等造成的影响,并提出了相应对策。

Controllable shunt reactor（CSR） can play the role of suppressing overvoltage and improving reactive power balance and its application is favourable to the enhancement power system stability and improvement of its operating economy benefit, so CSRs are widely applied in EHV and UHV power grids home and abroad. Taking a certain 750kV power transmission and transformation project planned to be constructed in China, which adopts the technologies of compact power transmission and double circuit on the same tower, for example, the influences of configurating CSR on power frequency overvoltage of power system, switching overvoltage due to load shdding operation, secondary arc current and recovery voltage are analyzed and correspoding countermeasures are put forward.