基于并联型12脉波整流器的直流侧混合谐波抑制方法  

Hybrid-harmonic Suppression Method at DC-side Based on Parallel 12-pulse Rectifier

作　　者：陈涛 陈小强[1,2] 米季炯 王英 CHEN Tao;CHEN Xiaoqiang;MI Jijiong;WANG Ying(School of Automation&Electrical Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Key Laboratory of Opto-Technology and Intelligent Control Ministry of Education,Lanzhou Jiaotong University,Lanzhou 730070,China;School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]兰州交通大学自动化与电气工程学院,兰州730070 [2]兰州交通大学光电技术与智能控制教育部重点实验室,兰州730070 [3]华北电力大学电气与电子工程学院,北京102206

出　　处：《高电压技术》2022年第9期3723-3733,共11页High Voltage Engineering

基　　金：国家自然科学基金(51767013;52067013);教育部重点实验室开放课题(KFKT2020-12)。

摘　　要：常规12脉波整流器会对电网造成大量谐波污染,为提高整流器交/直流侧电能质量,并权衡电能质量与经济成本等其它方面因素,提出一种混合谐波抑制方法,将其运用于多脉波整流器。通过建立星型自耦变压整流器混合谐波抑制模型,分析直流侧复合环流的调制原理,揭示混合谐波抑制机理;以网侧输入电流无谐波为目标,设计有源环节最优谐波抑制条件下,研究混合谐波抑制方法对整流器工作特性影响,并与其它谐波抑制方法比较。理论分析、仿真结果表明,所提出的方法谐波抑制代价较小,提高整流器电能质量的同时,有效降低磁性器件容量,保证较高的能量转化效率,更适合运用于大功率整流场合。The conventional 12-pulse rectifier can result in a lot of harmonics to the power grid. In order to improve both the AC and DC-side power quality of the rectifier, after the power quality and other aspects such as economic cost are compromised, a hybrid harmonic suppression method is proposed and is applied to multi-pulse rectifier. By establishing a hybrid harmonic suppression model based on star-connected auto-transformer, the modulation principle of DC-side composite circulating current is analyzed, and the hybrid harmonic suppression mechanism is revealed. With the goal of no harmonics in the grid-side output current, the compensating current of the active link and the inter-phase reactor are designed to achieve the best harmonic suppression effect. Under the optimal harmonic suppression condition, the influences of hybrid harmonic suppression method on the operation characteristics of rectifier are studied and compared with those of other harmonic suppression methods. Theoretical analysis and simulation results show that the proposed method has low harmonic suppression cost, improves the power quality of the rectifier, effectively reduces the kVA ratings of magnetic devices, ensures higher energy conversion efficiency, and is more suitable for high-power rectifier applications.

关 键 词：谐波抑制 平衡电抗器 自耦变压器 电能质量 多脉波整流器 

分 类 号：TM461[电气工程—电器]