摘要
采用电压源型换流器的并联型有源次同步振荡抑制技术近年来受到广泛关注。已有的并联型有源次同步振荡抑制器(ASS)的双频调制阻尼控制策略未考虑系统次同步和超同步电流不同的分流特性,因此,其抑制能力并不能达到最优。针对这一问题,首先分析并联型ASS的基本原理,提出了只发次同步电流或超同步电流的单频调制阻尼控制策略以及ASS关键参数设计方法;针对不同的系统特性,分析不同阻尼控制策略的抑制效果,提出了ASS阻尼控制优化设计方法。在PSCAD/EMTDC软件中搭建发电机组经固定串补和直流输电送出系统仿真模型,对不同的阻尼控制策略进行了对比,结果证明了所提阻尼控制策略优化方法的正确性。
The parallel active subsynchronous oscillation suppressor technology based on the voltage source converter has caused wide public attentions over recent years. The double frequency damping control strategy of the existing parallel active subsynchronous oscillation suppressor（ ASS） neglects the shunt ratio for the subsynchronous current and the supersynchronous current. Therefore, its optimal damping ability cannot be achieved. Aiming at this problem,the fundamental principle of the ASS has been analyzed firstly. And then the single frequency modulation method injecting the subsynchronous current or the supersynchronous current, as well as its corresponding parameter design method,has been proposed. For different systems,suppression effects of different damping control strategies have been analyzed. Then the design method of the ASS optimal damping control strategy is proposed. Transmission systems of generator with fixed series capacitor compensation and high voltage direct current are built in PSCAD / EMTDC respectively. Simulations are carried out and results show that the design and analysis of the optimal damping control strategy are effectiveness.
出处
《电工技术学报》
EI
CSCD
北大核心
2016年第21期150-158,共9页
Transactions of China Electrotechnical Society
关键词
电压源型换流器
次同步振荡
次同步电流
超同步电流
阻尼控制策略优化
Voltage source converter
subsynchronous oscillation
subsynchronous current
supersynchronous current
damping control strategy optimization
