交流不对称情况下交直流系统谐波分析计算方法

LI Zhikeng; WANG Gang; LI Haifeng; LI Xiaolin; FU Chuang

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交流不对称情况下交直流系统谐波分析计算方法

更新时间：2025-08-13

- 交流不对称情况下交直流系统谐波分析计算方法
- Automation of Electric Power Systems Vol. 34, Issue 6, Pages: 42-47(2010)
- 作者机构：
  
  1. 华南理工大学电力学院,广东省,广州市,510640
  2. 南方电网技术研究中心,广东省,广州市,510623
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2010
- 稿件说明：
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LI Zhikeng, WANG Gang, LI Haifeng, et al. [J]. Automation of electric power systems, 2010, 34(6): 42-47.
DOI：

LI Zhikeng, WANG Gang, LI Haifeng, et al. [J]. Automation of electric power systems, 2010, 34(6): 42-47. DOI：

摘要

分析了交流系统发生不对称故障时考虑换流阀非等间隔导通、三相换相角不相等和换相电流非线性等因素的换流器动态过程，建立了基于基本分量、修正分量和换相分量的三相电压电流开关函数以及换流器序分量开关函数模型，实现了在交流不对称情况下对交直流系统的精确分析计算。提出了考虑交直流系统间谐波相互作用及换流器不对称运行状态的交直流系统谐波分析计算方法，以代数解析表达方式揭示了交直流系统间谐波相互作用的机理。将所提出的方法应用于国际大电网组织（CIGRE）高压直流（HVDC）标准系统和南方电网贵广Ⅱ回HVDC系统的谐波分析计算，并与PSCAD/EMTDC软件所得数字仿真结果相比较，表明所提出的方法准确、有效，为交直流混联系统的谐波抑制、滤波装置的配置和继电保护的整定配合等提供了定量分析依据。

Abstract

Taking into account the variation of switching instants， unbalanced commutation overlaps and the nonlinear commutation currents caused by asymmetric faults， a detailed analysis of the dynamic process in the HVDC converter is given. Based on the superposition of basic component， modification component and commutation component， a three-phase voltage and current switching function model and sequence component switching function model of HVDC converter are established. Based on the model， an analysis and calculation method of harmonics in AC/DC system is proposed， in which the effects of harmonic interactions between the AC and DC system and the asymmetric operating conditions of the converter are studied. The mechanism of the harmonic interaction between AC and DC system is revealed by algebraic analytic expression. The method is used to the harmonic analysis and calculation of CIGRE HVDC system and GuiguangⅡ HVDC system. The results are compared with those obtained by simulation using PSCAD/EMTDC software. It is shown that the proposed method is accurate and effective， and provides the analysis basis of harmonic mitigation， filter configuration and protection analysis in AC/DC system.

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