储能式统一电能质量控制器负载电压全补偿容量配置策略

常规储能式统一电能质量控制器(UPQC)的补偿策略，为了实现串、并单元的功率协调分配，可能出现补偿前后负载电压相位跳变问题，对相位跳变敏感负荷有影响。为此，文中对储能式UPQC提出了一种负载电压幅值和相位全补偿容量配置策略。该策略在实现负载电压完全补偿的前提下，利用储能单元能够提供有功功率的特点，通过选择合适的并联补偿电流并使其幅值保持恒定，减小补偿后的电源电流幅值，从而使串联单元保持较低的补偿容量，减小了UPQC的串联单元容量的配置。仿真及低压小功率样机实验结果表明，所提策略可以实现负载电压的完全补偿，并减小了UPQC的串联单元补偿容量。

Capacity Allocation Strategy for Full Compensation of Load Voltage in Unified Power Quality Controller with Energy Storage

In order to achieve coordinated power distribution between series and parallel units, the conventional compensation strategy of unified power quality conditioner(UPQC)with energy storage will cause phase jump of load voltage before and after compensation, which has an effect on the phase jump sensitive load. Therefore, this paper proposes a capacity allocation strategy for full compensation of load voltage amplitude and phase in UPQC with energy storage. The proposed strategy enables the load voltage to be fully compensated. By using the characteristic that the energy storage unit is able to provide active power, the appropriate parallel compensation current is selected and its amplitude is kept constant, which reduces the amplitude of the compensated power supply current. Thus, the series unit keeps a low compensation capacity, and the capacity configuration of series unit of UPQC is reduced. The results of simulation and low-voltage small-power prototype experiments show that the proposed strategy can achieve full compensation of load voltage and reduce the compensation capacity of series unit of UPQC.