电力系统自动化2017，Vol.41Issue(18)：46-52,7.DOI:10.7500/AEPS20170112004
多桥换流器高压直流输电送端谐波不稳定分析与抑制
Analysis and Suppression of Harmonic Instability for Multi-bridge Converter Based HVDC System
摘要
Abstract
For the harmonic instability problem with the multi bridge converter caused by direct current (DC) magnetic bias in a high voltage direct current (HVDC) transmission system under different operating conditions,based on the switching function and modulating theory of the single-bridge 6-pulse converter,given the superposition characteristics of the converter transformer,the mathematical model of multi-bridge converter under different operating conditions is developed.Then,the modulation of harmonic between the AC/DC system sides through the obtained model is analysed,the magnification of harmonic and reliable criteria for determining harmonic instability of the multi bridge converter are quantitatively deduced.By comprehensively going over various factors affecting the criterion,some effective measures to improve system harmonic stability by reasonably designing the AC/DC system impedance and arrangement of operating conditions of the system are proposed.A simulation model for the multi-bridge converter based on PSCAD/EMTDC is built,the results verifying the correctness and effectiveness of the proposed criteria and measures.关键词
高压直流输电系统/多桥换流器/变压器直流偏磁/谐波不稳定Key words
high voltage direct current (HVDC) transmission system/multi-bridge converter/direct current magnetic bias of converter/harmonic instability引用本文复制引用
陈相,刘天琪,王顺亮,王峰,曾雪洋,江琴..多桥换流器高压直流输电送端谐波不稳定分析与抑制[J].电力系统自动化,2017,41(18):46-52,7.基金项目
This work is supported by Key Research and Development Program of Sichuan Science and Technology Department (No.2017GZ0054).四川省科技厅重点研发项目(2017GZ0054). （No.2017GZ0054）
