Analysis of harmonic transmission characteristics in HVDC system
Analysis of harmonic transmission characteristics in HVDC system
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高压直流系统谐波传输特性分析
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
L. Lisheng
中科院分区：
文献类型：
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作者：
W. Feng;Liu Yang;Fan Di;Sun Guoqiang;Zhang Linli;L. Lisheng
谐波是威胁高压直流输电系统安全稳定运行的重要因素。本文首先分析了换流变压器产生谐波的机理。然后，用开关函数法研究了交流系统和直流系统之间通过换流装置进行谐波来回传递的全过程，结果表明换流后系统的谐波频率发生了系统的变化。提出了多直流输电(DC/DC)系统谐波传输特性的谐波多馈入干扰因数分析方法。研究表明，远端直流换流器产生的谐波大小与电气距离有关。PSCAD仿真验证了所提出的方法和结论。
Harmonic is an important factor threatening the safe and stable operation of HVDC system. This paper firstly analyzes the mechanism of harmonics caused by converter transformer. Then., the whole process that harmonics transfer back and forth between the AC system and DC system through the converter is studied by switching function method., which shows the frequency of harmonics is changed systematic after commutation. The analysis method of Harmonic Multi-infeed Interaction Factor for harmonic transmission characteristics in multi HVDC(DC/DC) system is proposed in this paper. Research shows the induced harmonic magnitude from remote DC converters are relative to the electrical distance. PSCAD simulations verify the methods and conclusions.