高压直流输电系统数字物理动态仿真

摘要

对交直流输电系统进行大规模电力系统数字．模拟混合仿真，不但能实现常规的系统稳定性研究，还能针对局部系统进行详细的电磁暂态性能分析，极大提高了电力系统仿真分析的准确性。本文基于功率连接技术搭建了适用于交直流大电网仿真的数模混合仿真实验平台。该平台既可以对大电网进行全数字实时仿真也可对局部电力系统进行物理仿真，成功实现了三峡地下一上海西±500kV高压直流输电一次设备与数字大电网的数模混合实时仿真。数模混合仿真结果与全物理仿真装置仿真结果的比较，验证了利用本文提出的数模混合仿真平台进行数模混合仿真的可行性和有效性。%Large power system digital and analog hybrid simulation for AC/DC transmission system can not only study the conventional stability of power system, but also can do detailed electromagnetic transient performance analysis for local network. This can greatly improve the accuracy of power system simulation. This paper builds the AC/DC large power system simulation platform based on power interconnection technology. The platform can do full digital real time simulation and also can do analog simulation for the local grid, and then the digital and analog hybrid real time simulation for Three Gorges Underground-Western Shanghai ±500kV HVDC transmission system is successfully carried out in this paper. The comparison result of hybrid simulation and full physical simulation verify that using this platform to do analog-digital hybrid simulation is feasible and effective.