直流输电比起交流输电更适合进行远距离高压输电，基于PSCAD电磁暂态仿真软件构建了交流系统、换流变圧器、换流器、交-直流滤波器、平波电抗器及直流输电线路等的仿真模型，并以此搭建了500kV高压直流输电系统仿真模型，验证了该模型的准确性。(DC transmission is more suitable for long-distance transmission than AC transmission, the electromagnetic transient simulation soft

电力系统电磁暂态仿真，atpdraw在WINdows操作系统下运行，可以辅助建立ATP的输入数据文件，而且也是ATP的综合平台。(Various elements of digital distance relaying are organized to generate a systematic approach to modeling the actual hardware of digital relaying systems.)