特高压双回线路潜供电流补偿方案仿真研究

对特高压同塔双回线路中潜供电流的产生机理进行了研究，分析了补偿潜供电流的原理，并且比较分析了中性点小电抗法和快速接地开关（HSGS）法2种不同的补偿措施。以淮南-上海同塔双回特高压输电线路为例，采用实际线路的参数，在PSCAD／EMTDC仿真软件搭建数学模型。通过计算潜供电流、熄弧时间等主要技术指标，分别对中性点小电抗法在不同负载率、不同故障类型和不同故障点位置的潜供电流进行综合比较，分析了影响潜供电流的因素。最后通过仿真，分别计算了采用中性点小电抗法和快速接地开关（HSGS）法的潜供电流，得到中性点小电抗法比较适合我国特高压线路。

Simulation of Compensation Schemes for Secondary Arc Current in UHV Double-Circuit Transmission Lines

This paper discussed the production mechanism of secondary arc current in UHV double-circuit transmission lines, analysed the principle of the compensation for secondary arc current, and introduced 2 compensation schemes (the neutral reactors of shunt reactor compensation, high speed grounding switch). For Huainan-Shanghai UHV double-circuit transmission line as an example, the mathematical model based on the practical parameters was built by PSCAD /EMTDC. By the major technological index of secondary arc currents and quenching time, secondary arc currents were analysed and compared respectively in different load rates, different fault types and different points. The effect of various factors on secondary arc current was analysed, and secondary arc currents were computed respectively in 2 compensation schemes by simulation. Simulation results show the neutral reactors of shunt reactor compensation is more suitable for UHV in china.