Research on DC resonance mechanism and suppression measures of modular multilevel DC ice melting device

Guihang Yan; Jikang Wang; Hui Huang; Helong Chen; Yongzhong Li; Bin Yu

doi:10.1117/12.2611267

14 October 2021 Research on DC resonance mechanism and suppression measures of modular multilevel DC ice melting device

Guihang Yan, Jikang Wang, Hui Huang, Helong Chen, Yongzhong Li, Bin Yu

Proceedings Volume 11930, International Conference on Mechanical Engineering, Measurement Control, and Instrumentation; 1193012 (2021) https://doi.org/10.1117/12.2611267
Event: International Conference on Mechanical Engineering, Measurement Control, and Instrumentation (MEMCI 2021), 2021, Guangzhou, China

Abstract

DC ice melting is one of the effective measures for the power grid to resist low-temperature freezing disasters. The operational reliability of the DC ice melting device during the icing of the line is extremely important. This paper briefly introduces the topology and principle of the full-bridge modular multi-level DC ice melting device, and introduces the DC side oscillation phenomenon under the working state of the modular multi-level DC ice melting device. Next, This paper analyze the cause of resonance and take measures to suppress resonance. That is, measures such as shortening the delay of the DC ice melting device control system, optimizing the design of control parameters, and using nonlinear filters to process the feed forward voltage to suppress high-frequency resonance. The simulation results show that the phase frequency characteristics of the impedance of the DC ice melting system based on the modular multilevel convertor (MMC) topology have been greatly improved. The ice melting device can be unlocked and boosted normally, which proves the effectiveness of the optimized suppression measures and greatly reduces the risk of high-frequency resonance.

Citation Download Citation

Guihang Yan, Jikang Wang, Hui Huang, Helong Chen, Yongzhong Li, and Bin Yu "Research on DC resonance mechanism and suppression measures of modular multilevel DC ice melting device", Proc. SPIE 11930, International Conference on Mechanical Engineering, Measurement Control, and Instrumentation, 1193012 (14 October 2021); https://doi.org/10.1117/12.2611267

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