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| Suppression Strategy for High Frequency Resonance of Modular Multilevel Converter Based on Additional Band-Stop Filter |
| Du Dongye1, Guo Chunyi1, Jia Xiufang1, Zhao Chengyong1, Hu Yinghong2,3 |
1. State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China;
2. Electric Power Research Institute of State Grid JIBEI Electric Power Co. Ltd Beijing 100045 China;
3. North China Electric Power Research Institute Co. Ltd Beijing 100045 China |
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Abstract Modular multilevel converter control system link delay may cause high frequency resonance phenomenon. This paper establishes a mathematical model of high-frequency impedance for a modular multilevel converter including a link delay link, and studies the generation mechanism of high-frequency resonance of a modular multilevel converter based on impedance analysis. On this basis, a high-frequency resonance suppression strategy with a band-stop filter in the voltage feed-forward stage is proposed, and the control parameters of the band-stop filter are designed. Finally, the effectiveness of the proposed control strategy is verified by electromagnetic transient simulation.
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Received: 20 January 2020
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2021, Vol. 36 
