摘要
为了提升并网逆变器振荡抑制效果,研究含高比例风光储多微网接入的并网逆变器振荡特性建模与抑制方法。依据含高比例风光储多微网接入的并网逆变器结构,构建并网逆变器小信号等效电路模型,利用所提出的模型输出并网逆变器发生振荡时的电路等效阻抗。依据电路等效阻抗分析并网逆变器振荡抑制机理,使用dq解耦抑制方法结合PI控制器抑制振荡。实验结果表明,所提出的方法具备较高可靠性,并网逆变器波形得到有效的抑制,其波形不存在波动情况且分布区间仅在18~62 A,并且A、B相电压峰值抑制后稳定在3.11 kV和3.08 kV,有效降低了并网逆变器输出的电压峰值,具备良好的抑制振荡效果。
For the purpose of improving the oscillation suppression effect of grid-connected inverters,the modeling and suppression method of oscillation characteristics of grid-connected inverter with a high-proportion of wind-solar-storage multi-microgrid access is studied.According to the structure of the grid-connected inverters with a high-proportion of wind-solar-storage multi-microgrid access,constructs a small-signal equivalent circuit model of the grid-connected inverter,and uses the proposed model to output the circuit equivalent impedance of the grid-connected inverters when the grid-connected inverter oscillates.According to the circuit equivalent impedance,the oscillation suppression mechanism of the grid-connected inverter is analyzed,and dq decoupling suppression method and PI controller are used to suppress the oscillation.The experimental results show that the method has high reliability,the waveform of the grid-connected inverter can be effectively suppressed,the waveform does not fluctuate and the distribution range is only between 18 A and 62 A,and the voltage peak of A and B phase are stabilized at 3.11 kV and 3.08 kV,which effectively reduces the output voltage peaks of grid-connected inverter and has good oscillation suppression effect.
作者
贾洪岩
刘玉龙
魏宏杰
吴劲芳
闫志强
JIA Hongyan;LIU Yulong;WEI Hongjie;WU Jinfang;YAN Zhiqiang(State Grid Jibei Zhangjiakou Wind and Solar Energy Storage and Transportation New Energy Co.,Ltd.,Zhangjiakou 075000,China;Dongfang Electric New Energy Technology(Chengdu)Co.,Ltd.,Chengdu 610036,China)
出处
《微型电脑应用》
2025年第11期175-179,共5页
Microcomputer Applications
关键词
高比例的风光储
并网逆变器
振荡特性
次同步振荡
high-proportion of wind-solar-storage
grid-connected inverter
oscillation characteristics
sub-synchronous oscillation
