Commutation Failure Judgment Method for Multi-Infeed HVDC Systems Considering the Interaction of Commutation Failures
Xu Hanping1, Yang Weichen2, Zhang Dongyin1, Miao Shihong2, Wang Yicong1
1. Economics & Technology Research Institute State Grid Hubei Electric Power Company Wuhan 430077 China;; 2. State Key Laboratory of Advanced Electromagnetic Engineering and Technology Hubei Electric Power Security and High Efficiency Key Laboratory School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China
Abstract：In the multi-infeed high-voltage DC system (MIDC), the interaction among inverter stations is an important factor that triggers the propagation of commutation failure. In this paper, the transient characteristics of inverter station during commutation failure are analyzed in detail, and the commutation failure component is derived by the switching function model and the dynamic phasor theory. Then, the analytical calculation method is studied to reflect the commutation voltage of each inverter station, considering the mutual influence of AC system fault and commutation failure. On this basis, by comparing the maximum commutation area of each converter valve with the minimum commutation area required for turning off, a commutation failure judgement method is proposed. Finally, the simulation results verify the proposed method.
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2020, Vol. 35 
