摘要
随着各类变流器、开关电源等电力电子设备的规模化接入电网,配电网超高次谐波含量快速增加,由此产生的电能质量问题愈发严重。基于此,选取常见的两级式单相变频电路,对超高次谐波发射机理进行深入研究。首先采用开关函数法推导出网侧谐波电流的傅里叶级数表达式,然后计算超高次谐波含有率并分析其影响因素,最后通过仿真和实测验证理论分析的正确性,为配电网超高次谐波的量化、检测和监测提供参考。
The converters,switching power supply and other power electronic equipment will inject a large quantity of supraharmonics into distribution network when they are connected to the grid on a large scale,resulting in the problem of power quality which becomes more and more serious.On this basis,the supraharmonics emission mechanism for an ordinary two-stage single-phase frequency converter is studied in depth.First,the Fourier series expression of harmonic current on the grid side is derived using the switching function method.Then,the ratio of supraharmonics is calculated,and its influencing factors are analyzed.Finally,the theoretical analysis is verified by simulation and measurement results.The research can provide a reference for the quantification,detection and monitoring of supraharmonics in distribution network.
作者
李天楚
容斌
伍智鹏
黄珏
LI Tianchu;RONG Bin;WU Zhipeng;HUANG Jue(Electric Power Research Institute,Hainan Power Grid Co.,Ltd.,Haikou 570311,China;Key Laboratory of Physical and Chemical Analysis for Electric Power of Hainan Province,Haikou 570311,China;Electric Energy Metering Center,Hainan Power Grid Co.,Ltd.,Haikou 570311,China)
出处
《电源学报》
北大核心
2025年第2期161-170,共10页
Journal of Power Supply
关键词
单相变频器
开关函数
超高次谐波
发射机理
谐波含有率
Single-phase frequency converter
switching function
supraharmonics
emission mechanism
harmonic ratio
