多馈入交直流混合电力系统研究综述

Research Survey on Multi-Infeed AC/DC Hybrid Power Systems

在多馈入交直流混合电力系统中,由于交直流输电线路并列运行且多个直流换流站间电气距离较近,交直流系统间、直流子系统间相互影响,对多馈入交直流混合电力系统的控制和保护策略提出了新要求。文章概述了多馈入交直流混合电力系统中换相失败、直流系统故障后的恢复、电力系统功角/电压的稳定性、谐波的相互作用等问题的研究现状,指出了现有控制和保护策略的特点及不足,可为今后多馈入交直流混合电力系统的研究提供参考意见。

In multi-infeed AC/DC power system, due to the parallel operation of AC and DC transmission lines and closer electrical distances among DC converter stations, the AC and DC power systems as well as subsystems of DC system do interact, it brings new demand to control and protection strategies for multi-infeed AC/DC power system. In this paper an overview on present situation of the research on commutation failures, post-fault recovery of DC system, angle/voltage stability of power system, interaction of harmonics and so on is given, and the features and defects of existing control and protection strategies are pointed out. The conclusion of this research is available for reference to the research on multi-infeed AC/DC power system in future.