三电平不平衡负载补偿装置直流侧电压控制

Direct Current Voltage Control of Three-level Unbalance Load Compensation Device

在三相不平衡治理装置中,需要输出负序电流和零序电流来实现对不平衡负载的补偿。以三电平电能质量智能补偿装置为依托,从功率守恒的角度揭示了补偿正序、负序、零序电流时输出电流与直流侧电压的内在关系,同时根据不同应用场合建立电压控制的不同控制策略,实现逆变器直流电压和输出电流的精准控制,并借助实体样机进行验证。

In the three-phase unbalanced load compensation device,the negative sequence current and zero sequence current need to be output.Based on three-level of intelligent power quality compensation device,reveals the internal relations between direct current voltage and output current from the perspective of power conservation when compensating positive,negative and zero sequence current.At the same time,according to different applications to establish different control strategy for voltage control,to achieve accurate control of inverter direct current voltage and output current,and is verified in the physical prototype.