An improved prediction method of subsequent commutation failure of an LCC-HVDC considering sequential control response
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This work was supported in part by the National Natural Science Foundation of China under Grant (51877018)

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    Abstract:

    Subsequent commutation failure (SCF) can be easily generated during the frst commutation failure (CF) recovery process in a line-commutated converter-based high voltage direct-current system. SCF poses a signifcant threat to the safe and stable operation of power systems, and accurate prediction of CF is thus important. However, SCF is afected by the operating characteristics of the main circuit and the coupling efects of sequential control response in the inverter station. These are difcult to predict accurately. In this paper, a new SCF prediction method considering the control response is proposed based on the physical principle of SCF. The time sequence and switching conditions of the controllers at diferent stages of the frst CF recovery process are described, and the corresponding equations of commutation voltage afected by diferent controllers are derived. The calculation method of the SCF threshold voltage is proposed, and the prediction method is established. Simulations show that the proposed method can predict SCF accurately and provide useful tools to suppress SCF

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Jinxin Ouyang, Xinyu Pan, Junjun Ye, Chao Xiao, Yanbo Diao, Qingwu Zhang. An improved prediction method of subsequent commutation failure of an LCC-HVDC considering sequential control response[J]. Protection and Control of Modern Power Systems,2023,V8(3):772-782.[Jinxin Ouyang, Xinyu Pan, Junjun Ye, Chao Xiao, Yanbo Diao, Qingwu Zhang. An improved prediction method of subsequent commutation failure of an LCC-HVDC considering sequential control response[J]. Power System Protection and Control,2023,V8(3):772-782]

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  • Online: October 12,2023
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