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Loss calculation method and characteristics analysis for MMC-HVDC system

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Abstract

The calculation of MMC(Modular Multilevel Converter) loss is very important for the evaluation of VSC-HVDC system efficiency and the design of converter heat radiation,for which,a digital calculation method is proposed. The switching waveforms,voltage waveforms and current waveforms for a power frequency cycle are reproduced by the digital calculation program and the switching losses are acquired from the key parameters of concerned devices. A special calculation program is designed based on the proposed method,and the total losses of MMC-HVDC system are calculated and analyzed in detail for all operating conditions. The differences of loss characteristics among different devices and the impacts of switching frequency and double-frequency circulating current on the MMC loss are analyzed.

About this research paper

What this paper is about

The calculation of MMC(Modular Multilevel Converter) loss is very important for the evaluation of VSC-HVDC system efficiency and the design of converter heat radiation,for which,a digital calculation method is proposed. The switching waveforms,voltage waveforms and current waveforms for a power frequency cycle are reproduced by the digital calculation program and the switching losses are acquired from the key parameters of concerned devices. A special calculation program is designed based on the proposed method,and the total losses of MMC-HVDC system are calculated and analyzed in detail for all operating conditions. The differences of loss characteristics among different devices and the impacts of switching frequency and double-frequency circulating current on the MMC loss are analyzed.

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OpenAlex reports 9 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

The calculation of MMC(Modular Multilevel Converter) loss is very important for the evaluation of VSC-HVDC system efficiency and the design of converter heat radiation,for which,a digital calculation method is proposed. The switching waveforms,voltage waveforms and current waveforms for a power frequency cycle are reproduced by the digital calculation program and the switching losses are acquired from the key parameters of concerned devices. A special calculation program is designed based on the proposed method,and the total losses of MMC-HVDC system are calculated and analyzed in detail for all operating conditions. The differences of loss characteristics among different devices and the impacts of switching frequency and double-frequency circulating current on the MMC loss are analyzed.

Key concepts: Waveform, Modular design, Electronic engineering, HVDC converter, High-voltage direct current, Voltage, Power (physics), Power loss

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