摘要
对电力系统进行无功补偿是保证电力系统安全稳定运行的基本条件。在电力系统中,多采用机械投切进行无功补偿,一方面投切周期长,不适用于频繁操作,另一方面不能用于大容量变化补偿系统。因此,研究提出了基于TSC与MERS的大容量混合无功补偿系统,该系统是由多组TSC和一组MERS组成,采用TSC可以有效地提高开关频率,实现多级投切,避免在补偿过程中电压、电流冲击;采用MERS实现了无功连续调节,避免了由于电流谐波含量高造成的系统不稳定。通过对其工作原理和控制策略进行研究,并利用PSIM软件搭建理想情况下的仿真模型,通过对仿真结果进行分析,验证了该混合补偿系统的合理性和可靠性。
Reactive power compensation for the power system is to ensure the safe and stable operation of the power system,the basic conditions.In the actual power system,mechanical switching is generally used for reactive power compensation.On the one hand,it has a long switching cycle and is not suitable for frequent operation.On the other hand,it can not be used for large-capacity variation compensation system.Therefore,this paper proposes a large-capacity reactive power compensation system based on TSC.＋MERS The system consists of multiple TSCs and a group of MERS.The use of TSC can effectively increase the switching frequency,realize multi-level switching,and avoid compensation during compensation Voltage and current impact;continuous adjustment of reactive power is realized by MERS,which avoids system instability caused by high current harmonic content.Through its working principle and control strategy are studied,and by using PSIM software to build simulation model,ideally through analysis of simulation results verified the rationality and reliability of the mixed compensation system.
作者
王灿霞
成佳
WANG Can-xia;CHENG Jia(College of Electrical Engineering ＆ New Energy,China Three Gorges University,Yichang 443002,China)
出处
《电力学报》
2018年第4期294-300,共7页
Journal of Electric Power
