多级饱和磁阀式可控电抗器谐波分析数学模型  

Mathematical Model for Harmonics Analysis of the Multi-Stage Saturable Magnetic-Valve Controllable Reactor

作　　者：陈绪轩[1] 田翠华[1] 陈柏超[1] 刘耀中[1] 袁佳歆[1] 

机构地区：[1]武汉大学电气工程学院,武汉430072

出　　处：《电工技术学报》2011年第3期57-64,共8页Transactions of China Electrotechnical Society

基　　金：国家重点基础研究发展计划(973计划)(2009CB724506);国家自然科学基金(50807041;60971028)资助项目

摘　　要：提出了一种新型基于铁心分段饱和原理的多级饱和磁阀式可控电抗器的结构(Multi-Stage Saturable Magnetic-Valve Controllable Reactor,MSMCR),可有效减小磁阀式可控电抗器输出电流中所含的谐波。该装置的铁心部分由多个具有不同长度和面积的多级磁阀截面构成,各级磁阀在工作过程中由于磁饱和度不同而产生不同相位的谐波电流,通过各磁阀产生谐波电流的相互补偿可达到减小输出电流中所含谐波的目的。本文依据该装置铁心结构上的特点,建立了MSMCR谐波特性的数学模型,并得到以下结论:影响MSMCR输出谐波大小的主要因素有三个,分别为铁心分级的数量及各截面的长度和面积,其中后两者对MSMCR输出谐波影响最大。通过粒子群算法对截面参数进行优化设计,可使得MSMCR输出的总谐波电流最大值理论上不超过额定输出电流的2.6%。通过仿真得到的波形和理论波形相符,结合实验分析验证了数学模型的正确性和MSMCR抑制谐波的有效性,提高了磁控电抗器的谐波性能。This paper presents a novel structure of a multi-stage saturable magnetic-valve controllable reactor（MSMCR）.The MSMCR can greatly reduce the output harmonics of the magnetic-valve controllable reactor（MCR）.The working principle of the MSMCR is that there are several stages in the iron cores,these stages saturate at different time which also create current harmonics of different phases during the working process.Therefore,the current harmonics are compensated with each other and the total harmonics are reduced.The mathematical model which reveals the distribution characteristic of current harmonics for MSMCR is also presented.The results show that there are three main factors which will affect current harmonics the most： the stage quantity,the length and the area of each stage.The maximal current harmonics of the MSMCR can be theoretically reduced to 2.6% of the rated output current when the parameters in the model are properly chosen using the particle swarm optimization algorithm.The simulation and experimental results are the same with the theoretical results.It demonstrates that the mathematical model is correct and the MSMCR is effective in reducing the harmonics of the conventional MCR.

关 键 词：可控电抗器 谐波 数学模型 仿真技术 

分 类 号：TM401[电气工程—电器] TM474