论文部分内容阅读
根据国内外现有的资料,利用PSCAD/EMTDC软件,建立了一个较完整的换流站操作过电压计算模型,研究了有关操作和故障情况下±800 kV换流站直流侧可能出现的操作过电压。计算换流站主要设备典型故障工况时,对交流母线、直流线路、中性母线等设备可能产生的最大操作过电压水平进行了分析,还针对避雷器配置方法以及有避雷器和无避雷器时的过电压计算进行了研究。仿真计算结果表明,其有利于进一步分析特高压直流输电系统中因交直流系统故障引起的操作过电压大小以及相应绝缘水平的确定。
Based on the existing data both at home and abroad, a more complete converter overvoltage calculation model was established by using PSCAD / EMTDC software and the possible operation of the ± 800 kV converter station on the DC side in the case of operation and fault was studied Voltage. When calculating the typical fault condition of the main equipment of converter station, the maximum operating overvoltage levels that may occur in equipment such as AC bus, DC line and neutral bus are analyzed, and the method of configuring the arrester and the method of arrester and arrester-free Voltage calculations were studied. Simulation results show that it is conducive to further analysis of the HVDC transmission system due to AC-DC system failure caused by the size of the operating voltage and the corresponding insulation level determination.