基于开关函数法的高压直流系统谐波分析  

Harmonic Analysis of HVDC System Based on Switching Function Method

作　　者：田创新 Tian Chuang-xin

机构地区：[1]中石油玉门油田公司水电厂,甘肃酒泉735000

出　　处：《今日自动化》2021年第5期47-48,共2页Automation Today

摘　　要：文章对特高压直流换流站产生谐情况作了简要的介绍,然后介绍了进行谐波分析的方法选择。经过综合比较,选定开关函数法作为谐波分析的主要方法。根据开关函数的定义和变流设备具有离散采样及调制的开关特性,其输入电流波形和输出电压波形可以用许多开关函数与正弦函数的调制波形来表示,这种调制波形经过三角变换之后即可以得到谐波特性。对三相六脉动变流装置电压与电流的开关函数的过程进行了详尽的推导,并且归纳出开关函数适用于换相和非换相情况下,对称和故障时的开关函数表达式,建立电压与电流的开关函数模型,进行了算例分析。A brief introduction is made to the harmonic generation of UHV DC converter stations,and then the method of harmonic analysis is selected.After comprehensive comparison,the switching function method is selected as the main method of harmonic analysis.According to the definition of the switching function and the converter device has discrete sampling and modulation switching characteristics,its input current waveform and output voltage waveform can be represented by many switching functions and sine function modulation waveforms.This modulation waveform can be used after triangular transformation.Obtain harmonic characteristics.The process of the switching function of the voltage and current of the three-phase six-pulse converter device is deduced in detail,and the switching function is suitable for commutation and non-commutation conditions,the symmetrical and faulty switching function expressions,and the establishment of the voltage An example analysis is carried out with the switching function model of the current.

关 键 词：谐波分析 换流站 开关函数法 故障分析 

分 类 号：TM711[电气工程—电力系统及自动化]