The Simplified Model of Back-To-Back PWM Converter

This paper proposes a simplified model of PWM converter, which is proved to be effective in saving simulation time. Take doubly-fed wind power system as an example, the PWM converter is simplified in two aspects: a) the AC side of converter precisely and flows the output voltage reference; b) ignore...

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Bibliographic Details
Published inIOP conference series. Materials Science and Engineering Vol. 452; no. 4; pp. 42030 - 42036
Main Authors Li, Xutao, Yuan, Saijun, Zhang, Di, Bai, Cunxi, Yang, Huibiao, Hao, Zhiguo, Xu, Jingdong
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 13.12.2018
Subjects
Current sources
Electric converters
Electric potential
Equivalent circuits
Simulation
Voltage
Waveforms
Wind power
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Summary:This paper proposes a simplified model of PWM converter, which is proved to be effective in saving simulation time. Take doubly-fed wind power system as an example, the PWM converter is simplified in two aspects: a) the AC side of converter precisely and flows the output voltage reference; b) ignore the power loss of converter, which means the AC side power equals to DC side. Based on the two assumptions, the voltage of AC side could be replaced by a voltage-controlled voltage source, and the DC side could be replaced a controlled current source. By this way, the complex IGBTs converter is simplified to an equivalent circuit. Simulation with specific model and simplified model then performed in PSCAD/EMTDC. By comparing their waveforms and simulation speed, the correctness and benefits of the proposed model are verified.
ISSN:1757-8981
1757-899X
1757-899X
DOI:10.1088/1757-899X/452/4/042030