摘要
在多脉波整流系统中,直流侧有源谐波抑制技术可以进一步降低输入电流的谐波含量。在18脉波三角-多边形自耦变压整流器的基础上,采用直流侧注入电流的有源谐波抑制方式,分析了注入电流的补偿原理,研究了注入电流的实现方法,建立了整流电路的模型。仿真结果表明,在负载变化和三相电压发生不平衡时,网侧电流的谐波总畸变率保持在3%以下,电压不平衡造成的影响也有所减小。在整流器谐波抑制性能得到提高的同时,降低了其制造成本。
In a multi-pulse rectifier system,the harmonic content of input currents can be further reduced by the technique of active harmonic suppression in the DC side.Based on an 18-pulse delta-polygon autotransformer rectifier,an active harmonic suppression method is adopted for the injection currents in the DC side.The compensation principle of injection currents is analyzed,and the realization method of injection currents is studied.A model of rectifier circuit is built,and simulation results show that the harmonic content of input currents from the power grid is kept below 3%when the load changes and an unbalance of three-phase voltage occurs;moreover,the influence due to unbalanced voltage is also reduced.In this way,the harmonic suppression performance of the rectifier is improved together with a lower manufacturing cost.
作者
刘前
陈小强
王英
LIU Qian;CHEN Xiaoqiang;WANG Ying(School of Automation and Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《电力系统及其自动化学报》
CSCD
北大核心
2018年第4期41-48,共8页
Proceedings of the CSU-EPSA
基金
甘肃省教育厅自然科学基金资助项目(2017A-020)
国家自然科学基金资助项目(51767013)
中国铁路总公司科技研究开发计划资助项目(2017J012-A)
国家科技部重点研发计划资助项目(2017YFB1201003)
关键词
18脉波整流器
移相变压器
有源谐波抑制
电能质量
18-pulse rectifier
phase-shift transformer
active harmonic suppression
power quality
