摘要
江苏电网将在"十三五"中后期建成四回直流线路,形成典型的多馈入交直流混联电网。利用多馈入有效短路比指标分析了网架拓扑、调相机配置等因素对临近直流落点电网强度的影响,并在此基础上进行暂态稳定仿真。仿真结果验证了直流落点电网多馈入有效短路比降低与重要故障暂态失稳存在相关性,加强网架以及增加调相机的措施都能够提高电网强度并改善直流逆变站系统的无功电压稳定性,再可从提升多馈入电网薄弱环节处的多馈入有效短路比的角度入手,结合实际工程应用合理提高多馈入交直流混联电网的无功电压稳定性。
Jiangsu power grid will build four-Circuit DC lines in the middle and late period of the 13th five-year plan, which will form a typical multi-infeed AC/DC hybrid power grid. This paper analyzes the influence of network topology and phase modulator configuration on the strength of adjacent DC placement grid by using the multi-feed effective short-circuit ratio index, and then performs transient stability simulation. Simulation results verify the correlation between the DC placement grid multi-infeed effective short circuit ratio decrease and the important fault transient instability. To strengthen network frame and improve the phase modulator configuration can enhance the strength and improve the reactive voltage stability of the DC inverter station sys- tem. Then to increasethe short circuit ratio and combine with the practical engineering application can reasona- bly improve the reactive voltage stability of multi-infeed AC/DC hybrid power grid.
出处
《电力与能源》
2018年第1期1-5,共5页
Power & Energy
