电网级电力电子研究热点 --- 宽频震荡(小扰动)
MMC变换器的阻抗存在谐振尖峰,当与风电场互联或并弱电网时赌博游戏,会由于负阻尼效应而产生谐波震荡问题,以下为具体现象的简单介绍。
应用场景为:
具体阻抗交叉和振荡现象:
参考文献: J. Lyu, X. Zhang, X. Cai, and M. Molinas, "Harmonic State-Space Based Small-Signal Impedance Modeling of a Modular Multilevel Converter with Consideration of Internal Harmonic Dynamics," Ieee T Power Electr, vol. 34, no. 3, pp. 2134-2148, 2019, doi: 10.1109/TPEL.2018.2842682.