交直流混联电力系统小干扰稳定性分析综述

Small Signal Stability Analysis of AC/DC Hybrid Power System:An Overview

该文以交直流混联电力系统的小干扰稳定性为研究对象，依次梳理了十几年来国内外在该方面的研究成果；从交直流混联系统间动态交互过程的角度，分别综述了含VSC-HVDC和VSC-MTDC混联电力系统小干扰稳定性的研究内容和方法，得出目前复杂交直流混联电力系统在小干扰稳定性研究中面临的主要挑战为：1）以阻抗法为代表的传统频域分析法能够清晰地阐明简单混联系统间的动态交互过程，揭示其稳定性的内在机理，但是难以在多输入多输出特性的复杂混联电力系统中得到应用；2）由于分析方法的缺失，复杂混联电力系统小干扰稳定性分析中动态交互过程对稳定性的影响机理暂不明确。基于此，指出未来的研究方向主要有：1）继续完善单输入单输出混联电力系统的机理分析体系，充实其小干扰稳定性的内在机理；2）提出适用于多输入多输出机理分析方法，揭示复杂混联电力系统的稳定性内在机理。

The research results and main dynamic interaction analysis methods of small signal stability of AC/DC hybrid power systems with VSC-HVDC and VSC-MTDC in recent years, both china and abroad, were summarized in this paper. Concluded that challenges of small signal stability mechanism research of the complex AC/DC hybrid power system are as follows： 1） Traditional frequency analysis methods, represented by impedance method, can illustrate the dynamic interaction and mechanism in a simple hybrid system clearly, but cannot apply for the multiple input multiple output system; 2） The mechanism of complex hybrid power system small signal stability is hard to reveal because of the lack of methods. Finally, the research contexts in the future are indicated as： 1） Continue to improve the mechanism analysis method of single input single output hybrid power system, and enrich the inherent mechanism of small disturbance stability. 2） Put forward a suitable mechanism analysis method for multiple input multiple output, and reveal the inherent mechanism of the stability of complex hybrid power system.