330 kV输电线路断路器取消合闸电阻适应性研究

Adaptability of Cancellation of the Closing Resistance of Circuit Breaker for 330 kV Transmission Line

新时期的电网规划造成主干输电线路距离逐渐缩短,因此有必要开展短距离下合闸电阻对线路过电压治理的影响分析以提高供电可靠性。本研究结合西北电网实际数据,基于PSCAD电磁暂态计算对330 kV输电线路在不同距离不同工况下合闸电阻的作用规律和投运策略进行仿真分析。通过对线路、杆塔、避雷器、断路器建模,研究不同距离线路在合闸电阻和避雷器不同配置情况下,合闸电阻的投运状态对操作过电压的影响程度,得出330 kV不同距离输电线路限制操作过电压的策略。为330 kV短距离输电线路取消合闸电阻的适应性提供一定参考建议。

The power grid planning in the new era has resulted in the gradual shortening of the main transmission line distance.Therefore,it is necessary to carry out the analysis on the influence of the short-distance closing resistance on the line overvoltage control to improve the reliability of power supply.In this paper,combined with the actual data of the Northwest Power Grid,based on the PSCAD electromagnetic transient calculation,the 330 kV transmission line's function law and commissioning strategy of the closing resistance under different distances and different working conditions are simulated and analyzed.By modeling the lines,towers,arresters,and circuit breakers,the effect of the operating status of the closing resistors on the operating overvoltage of the lines with different distances under different configurations of closing resistors and arresters are studied.A strategy to limit the operating overvoltage of 330 kV transmission lines with different distances is obtained,providing certain reference suggestions for the adaptability of 330 kV short-distance transmission lines to cancel the closing resistance.