摘要
提出一种由TSC和STATCOM构成的混合无功补偿装置,兼具TSC大容量、低成本和STATCOM准确无功补偿的优点。采用分层控制结构,利用专家系统来推理协调二者运行。对TSC频繁投切的情况,为避免电容器组投入时的涌流,TSC采用预充电技术,并于电网电压峰值时刻投入。考虑到STATCOM的数学模型为一强耦合、非线性系统,采用逆系统方法对其进行线性化解耦,再用变结构理论进行设计。仿真结果表明,在采用所提控制策略下,该混合无功补偿装置具有良好的补偿效果。
A hybrid var compensator which consists of thyristor switched capacitor （ TSC） and static synchronous compensator （STATCOM） is proposed.It has the advantages of TSC and STATCOM and can realize low cost , large capacity and accurate reactive compensation .The hierarchical control structure is adopted and the coordinated control of TSC and STATCOM is real -ized by expert system .In order to avoid inrush current , the pre-charge technology is applied to TSC and the capacitor is put into operation in the system voltage peak .Considering the fact that the mathematical model of STATCOM is a nonlinear cou-pling system, the inverse system approach is adopted to carry out the decoupling linearization of the original system .Then the variable-structure control is used for its design .The simulation results indicate that the hybrid var compensator has a perfect compensation performance based on the proposed control strategy .
出处
《四川电力技术》
2014年第3期34-38,共5页
Sichuan Electric Power Technology
关键词
无功补偿
混合无功补偿装置
专家系统
逆系统
变结构控制
reactive compensation
hybrid var compensator
expert system
inverse system
variable-structure control
