Abstract There are various nonlinear components in the HVDC transmission system to cause harmonic generation and the converter station is the main harmonic source of the HVDC transmission system. Harmonics have varying degrees of impact and hazards on various electrical equipment, power lines and communication systems. Therefore, a reasonable analysis of the harmonic characteristics of the converter station is of great significance for the research and development of HVDC transmission technology. In this paper, the ±500kV converter station in Yunnan is taken as the research object. The Fourier analysis method is used to analyze the DC side harmonics of the converter station. And the Narda electric field measuring instrument is used for harmonic measurement. Proposing the suppression method of each harmonic is based on the DC side harmonic measurement results. 12/24/36 three-tuned filter are used to filter out characteristic harmonics. It has the advantages of small installation capacity and low fundamental wave loss while ensuring the filtering effect. And using the single-tuned filter to filter 2/3/6/11 harmonic orders unless the characteristic harmonics which structure is simple.

中文翻译：

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±500kV换流站直流侧谐波测量

摘要 高压直流输电系统中存在多种非线性成分引起谐波的产生，换流站是高压直流输电系统的主要谐波源。谐波对各种电气设备、电力线和通信系统都有不同程度的影响和危害。因此，合理分析换流站的谐波特性，对于高压直流输电技术的研发具有重要意义。本文以云南±500kV换流站为研究对象。采用傅里叶分析法对换流站直流侧谐波进行分析。Narda电场测量仪用于谐波测量。根据直流侧谐波测量结果提出各次谐波抑制方法。12/24/36 三调谐滤波器用于滤除特征谐波。在保证滤波效果的同时，具有安装容量小、基波损耗低等优点。并使用单调谐滤波器滤除2/3/6/11次谐波，除非特征谐波结构简单。