STATCOM电压控制系统性能分析

电压反馈控制是ＳＴＡＴＣＯＭ（静止同步补偿器）控制器中必不可少的核心环节之一。论文从理论分析、数字仿真、动模实验３个方面对影响ＳＴＡＴＣＯＭ电压控制器性能的因素进行了分析。这些因素包括ＳＴＡＴＣＯＭ安装点的短路阻抗、系统抗的动态特性、ＳＴＡＴＣＯＭ运行点、脉冲发生器的同步锁相技术和系统负荷等。还分析了ＳＴＡＴＣＯＭ电流控制的稳定问题。并指出动态增益是决定控制器稳定性的关键参数，给出了工程实用中提高

VOLTAGE REGULATION STABILITY ANALYSIS OF STATCOM

This paper analyzes the voltage control stability of STATCOM(Static Synchronous Compensator). Maximum response rate of STATCOM is always expected to meet the power system performance requirements, but its control loop might become unstable under certain circumstances. The factors influencing the stability margin of the STATCOM voltage control loop are described in details in this paper, these factors include the strength of the power system viewed from STATCOM, the inherent resonance of power network, the operation point of STATCOM, the phase lock loop and the load. This paper also provides phase compensation method to enhance the stability of STATCOM voltage regulating loop. Theoretical analysis in frequency domain, digital simulation and real experimental investigation are all performed in this paper to give convincing conclusion.