摘要
基于电压源型换流器VSC的新型直流输电技术,克服了传统直流输电系统的一些缺点,但诸如换流技术引发的电能质量问题等方面,尚待研究解决。采用合理的控制策略和应用多电平换流器能够减少谐波污染。介绍了基于功率电流双环控制方法的有功、无功独立调节控制系统,采用了三电平逆变器,利用PSCAD/EMTDC仿真软件进行了仿真分析,结果表明该控制系统功率控制灵活,电流注入谐波较少。
The voltage sourced convertor （VSC） based VSC-HVDC transmission technology overcomes the flaws of the conventional HVDC system, however, there are still many problems need to be solved such as the power quality problem caused by the convertor. The harmonic distortion can be minimized by using an appropriate convertor control strategy and a multilevel convertor. Dual control loops for power and current were chosen as the control strategy and the three-level convertor structure was employed. The PSCAD/EMTDC simulation showed the control system flexible and effective.
出处
《华东电力》
北大核心
2009年第3期399-402,共4页
East China Electric Power
基金
国家863高技术基金项目(2007AA05Z458)
