动态负载下PSM电源的谐波研究  

Research on Harmonics of PSM Power Supply under Dynamic Load

作　　者：林华辉 阳璞琼[1,2] LIN Hua-hui;YANG Pu-qiong(School of Electrical Engineering,University of South China,Hengyang 421001,China;The Key Laboratory of Magnetic Confinement Nuclear Fusion Research,University of South China,Hengyang 421001,China)

机构地区：[1]南华大学电气工程学院,湖南衡阳421001 [2]南华大学磁约束核聚变研究重点实验室,湖南衡阳421001

出　　处：《电工电气》2021年第10期7-11,共5页Electrotechnics Electric

基　　金：国家自然科学基金项目(11675074);衡阳市科技计划项目基础应用研究专项(202002042159)。

摘　　要：动态负载造成的谐波会影响电网电能质量,危害系统安全运行。利用MATLAB/Simulink建立离子回旋共振加热(ICRH)的PSM高压电源模型,分析了静态与动态下不同负载特性的谐波含量以及纯阻性下各种负载动态产生的特征次谐波含量,对比各次数谐波含量后,判断负载大致变化趋势。仿真结果表明,感性和容性负载对总谐波畸变率影响很小,而动态阻性负载产生较大的总谐波畸变率,多集中在24脉波整流产生的24k±1次以及2~8次的低次谐波;阻值动态范围越大,低次谐波越严重。Dynamic loads could cause harmonics.It might affect the quality of the power grid and endanger the safe operation of the system.This paper used MATLAB/Simulink to establish a PSM high-voltage power supply model for ion cyclotron resonance heating(ICRH).Herein,analyzed the harmonic content of different load characteristics under static and dynamic conditions and the characteristic subharmonic content generated by various loads under pure resistance.After comparing the harmonic content of each order,judge the general change trend of the load.The simulation results show that inductive and capacitive loads have little effect on THD,while dynamic resistive loads produce larger THD,mostly concentrated in the 24k±1 order and 2~8th low-order harmonics generated by 24-pulse rectification.In addition,the larger the dynamic range of the resistance,the more serious the low-order harmonics.

关 键 词：离子回旋共振加热 高压电源 动态负载 总谐波畸变率 

分 类 号：TM714[电气工程—电力系统及自动化] TN86[电子电信—信息与通信工程]