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ORIGINAL RESEARCH article
Front. Energy Res.
Sec. Smart Grids
Volume 12 - 2024 |
doi: 10.3389/fenrg.2024.1420234
The HVDC Commutation Failure Mechanism Impacted by Harmonic and Its Suppression Method
Provisionally accepted- State Grid Jiangsu Electric Power Co., LTD, Nanjing, China
Voltage reduction and voltage distortion are the main causes of commutation failure. Although the problem of commutation failure caused by voltage distortion has been reported in the literature, it is called "abnormal commutation failure". However, most of the current research on commutation failure is based on the drop in fundamental voltage after a fault, and there are few reports on the impact of voltage distortion on commutation failure. Harmonics are an important cause of voltage distortion. This article first analyzes the generation and transmission characteristics of harmonics in AC and DC systems as well as the coupling degree of harmonics in DC systems. Then starting from the mechanism of the commutation process, a commutation failure analysis method based on harmonic voltage time area is proposed. This method can quantitatively analyze the impact of different harmonics on commutation failure. On this basis, the harmonic the criteria for causing commutation failure are established, and the harmonic characteristics of AC voltage when harmonics cause subsequent commutation failure are quantitatively analyzed. Finally, a preventive controller is proposed to suppress commutation failure caused by different harmonics.
Keywords: Harmonic impact, HVDC transmission line, Commutation failure, Suppression method, LCC
Received: 19 Apr 2024; Accepted: 26 Aug 2024.
Copyright: © 2024 Zhang, Zhao, Jia, Zhou and Xu. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence:
Guojiang Zhang, State Grid Jiangsu Electric Power Co., LTD, Nanjing, China
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