High-frequency Resonance Suppression Measure for MMC-HVDC Considering Frequency Coupling Effect [考 虑 频 率 耦 合 效 应 的 柔 性 直 流 输 电 高 频 谐 振 抑 制 措 施]

作者：Wang Z.; Wang J.; Liu Y.; Feng J.; Chen W.; Fu C.^*

来源：Automation of Electric Power Systems, 2023, 47(10): 164-173.

DOI：10.7500/AEPS20220524003

• admittance modeling
• frequency coupling effect
• high-frequency resonance
• modular multilevel converter based high voltage direct current (MMC-HVDC)
• stability analysis
• suppression strategy

The frequency coupling effect of the modular multilevel converter affects the impedance characteristics of the converter, and then affects the effectiveness of high-frequency resonance suppression measures. Firstly, the frequency coupling effect is considered to establish the AC side admittance matrix model of the modular multilevel converter. Secondly, the influence of common high-frequency resonance suppression measures on the system frequency coupling effect is quantitatively analyzed. The result shows that the frequency coupling effect of the system has a tendency to intensify with the common high-frequency resonance suppression measures. Then, a measure to suppress both the frequency coupling effect and the high-frequency resonance is proposed. Finally, the Guangxi side model of Luxi back-to-back asynchronous grid-connection project in PSCAD/EMTDC is taken as an example to verify the correctness of the model and the effectiveness of the proposed measure.

• 单位
  南方电网科学研究院有限责任公司; 华南理工大学