Research of grid fault ride-through strategy for PWM-CSC based hybrid HVDC transmission system

被引：0
|
作者：
Xia B. [1 ,2 ,3 ]
Li Y. [1 ,2 ,3 ]
Li Z. [1 ,2 ,3 ]
Xu F. [1 ,2 ,3 ]
Gao F. [1 ,2 ,3 ]
机构：
[1] Key Laboratory of Power Electronics and Electric, Chinese Academy of Sciences, Beijing
[2] Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing
[3] College of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2019年 / 39卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Hybrid HVDC power transmission; Maximum power transmission; Negative-sequence grid current elimination; PR controller; PWM; PWM-CSC; Unity power factor operation;
D O I：
10.16081/j.epae.201908038
中图分类号：
学科分类号：
摘要：
A hybrid HVDC(High Voltage Direct Current) transmission system adopting LCC(Line Commuta-ted Converter) on rectifier side and PWM-CSC(Pulse Width Modulated-Current Source Converter) on inver-ter side is researched. To achieve low switching frequency and improve fault response performance, the SHE(Selective Harmonic Elimination) modulation strategy is adopted under normal state and the modulation method is switched to SPWM(Sinusoidal PWM) under grid fault state. The αβ stationary reference frame based mathematical model of the proposed system is deduced under grid fault state and a PR(Proportional Resonant) controller to eliminate the negative-sequence grid current and realize unity power factor operation is proposed. The PR parameters are designed. Besides, the calculation of the maximum transmission power under grid fault state is presented. Finally, a simulation model of 400 kV/1 250 MW unipolar hybrid HVDC transmission system is built by PSCAD/EMTDC. The simulative results verify the correctness and effectiveness of the proposed control method. © 2019, Electric Power Automation Equipment Press. All right reserved.
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收藏
页码：120 / 126
页数：6
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