During the operation of the inverter parallel system,due to some factors such as uneven power distribution and mismatched control parameters,the switch state of the two inverters are not synchronized,resulting in zero sequence circulating current in the loop.Therefore,this article proposes a zero sequence circulating current suppression strategy based on double cascade model predictive current control.By adding zero sequence circulating current to the comprehensive objective function and selecting the optimal switch state combination,the zero sequence circulating current suppression is achieved.At the same time,by changing the objective function structure and implementing a double cascade to select the switch state combination,the influence of weight coefficients on the control system is eliminated while reducing computational burden.Finally,the effectiveness of the control strategy is verified through the simulation and experimentation by MATLAB/Simulink.
关键词
低压配电网/并联逆变器/零序环流/有限集模型预测控制
Key words
low voltage distribution network/parallel inverter/zero sequence circulating current/finite control set model predictive control
维普
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