±800kV换流站交流场线路操作过电压仿真分析

Simulation Analysis of Transmission Line Operating Overvoltage of ±800kV Converter Station AC Field

操作过电压是造成电网内高电压设备损坏的重要原因之一,了解过电压情况,以便采取防护措施,防止损坏设备。以±800kV扎鲁特换流站交流场500kV线路为例,采用电磁暂态计算软件EMTPE/EMTS进行建模,从理论上分析线路操作过电压产生原因,对投切线路及线路单相故障操作过电压进行仿真分析,仿真过电压数据低于规程要求值,为系统调试提供了理论依据,系统调试期间采集现场实测数据,实测数据与仿真数据一致,验证了模型的正确性。研究结果为线路运维管理提供了理论依据。

Switching overvoltage is one of the important reasons for the damage of high voltage equipment in the power grid.Overvoltage must be calculated for new power grid projects so as to take protective measures to prevent damage to the equipment.Taking the 500 kV line of the±800kV Zhalute converter AC field as an example,EMTPE/EMTS was used to analyze the cause of line switching overvoltage in theory.Switching line and single-phase fault operation overvoltage are simulated.The simulation overvoltage data is lower than the required value of the regulation,which provides a theoretical basis for the system experiment.Finally,the simulation data and the measured data are compared and analyzed.The result is consistent,and the correctness of the model is verified.The research results provide a theoretical basis for the analysis of future line operation and maintenance.