Dc Bus Voltage Regulation Control Strategy for Energy Storage System Considering the Influence of Reactive Current
In the three-phase power converter of the energy storage system,the voltage-loop is the outer loop of the active current-loop.It plays a role in maintaining the voltage regulation of the DC bus in the energy storage system.This paper the considers reactive current,which would affect the dynamic performance of voltage loop,analyzes the influence of switching loss caused by the active and reactive current on the outer voltage loop,and proposes a dc bus voltage stability control strategy of the energy storage system.The power loss is taken as the disturbance term of the voltage loop,and the influence of active and reactive currents on the voltage of the DC bus is analyzed.On this basis,a voltage stabilizing loop is designed,and its principle is demonstrated.The dynamic performance of the proposed strategy is analyzed.Finally,the simulation model and principle prototype of the 30kW three-phase power converter are established.The simulation and experimental results show that the converter can achieve good dynamic and steady performance with the proposed DC bus voltage regulation strategy,which proves the correctness of the theoretical analysis.
energy storage systemthree-phase power converterDC bus voltage regulatorpower losscurrent inner loop
万方数据
维普
