基于新型低损耗平衡变换技术的多相整流系统

doi:10.19595/j.cnki.1000-6753.tces.170136

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摘要

常规抽头式平衡电抗器技术可有效抑制大功率多相整流器的网侧电流谐波,但负载电流全部流经抽头二极管。这一情况致使二极管导通损耗严重,制约了该技术的应用。为此,提出一种结构简单、可靠性高的谐波抑制方法。该方法从常规六相整流系统的直流侧入手,在常规平衡电抗器上增设一个中心抽头式的绕组,通过合理配置其匝比,并在此绕组与负载之间串接单相全波整流器即可实现。利用该方法对原整流系统电流进行调制,可使原整流器从12脉波工作状态转变为24脉波工作状态。该方法不仅可取得与两抽头变换法一样的网侧电流谐波抑制效果,与两抽头变换法相比,还可使单相全波整流器二极管的平均电流不超过负载电流的2%,即可有效解决了传统抽头变换法因高损耗带来的问题。理论分析、仿真及实验结果均验证了所提方法的正确性和有效性。

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	李渊
	杨威
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	杨世彦

关键词 ：抽头式平衡电抗器, 多相整流器, 导通损耗, 谐波抑制

Abstract：

Conventional tapped inter-phase reactor (TIPR) can efficiently suppress current harmonics at line side of high power multi-phase rectifier (MPR), but the load current flows totally through the diode of TIPR. This situation makes its conduction loss serious, which restricts its application. Therefore, this paper proposed a harmonic suppression method with simple structure and high reliability. The new method was achieved at the DC side of a conventional six-phase 12-pulse rectifier, by adding a winding with a center tap on the secondary side of the Inter-Phase Reactor, allocating the turn ratio reasonably, and then installing a single phase full wave rectifier between the winding and the load of MPR. Through the current modulation mechanism, the rectifier could be changed from 12 pulse working state to 24 pulse working state. Moreover, compared with the conventional two tap transform method, the proposed method could achieve the same harmonic suppression effect, but enable the average current through the diode not to exceed 2% of the load current. The new method could effectively solve the application difficulties caused by the high loss of TIPR. Theoretical analysis, simulations and experimental results verify the proposed method.

Key words： Tapped inter-phase reactor multi-phase rectifier conduction loss harmonic suppression

收稿日期: 2017-02-10 出版日期: 2018-05-24

PACS:

TM461

基金资助:

国家自然科学基金资助项目（51677036）

通讯作者: 杨世彦男,1962年生,教授,博士生导师,研究方向为大功率特种电源及应用技术、优化组合拓扑及其系统特性。E-mail: syyang@hit.edu.cn

作者简介: 李渊男,1984年生,博士研究生,研究方向为电能质量控制技术。E-mail: liyuan_todd@163.com

引用本文:

李渊, 杨威, 徐可, 杨世彦. 基于新型低损耗平衡变换技术的多相整流系统[J]. 电工技术学报, 2018, 33(10): 2312-2323. Li Yuan, Yang Wei, Xu Ke, Yang Shiyan. A Novel Low Loss Interphase Transformation Technology for Multiphase Rectifier System. Transactions of China Electrotechnical Society, 2018, 33(10): 2312-2323.

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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.170136 https://dgjsxb.ces-transaction.com/CN/Y2018/V33/I10/2312

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