【摘要】 提出了一种新型的综合电能质量调节装置,通过在电源与负载之间连接一组三相电抗器,在连接电抗器的两端分别并联一套逆变器,能够实现与传统UPQC相似的综合电能质量调节功能,且结构简单、易于控制.装置采用了基于功率控制的系统控制策略,控制思路为:负载在额定电压下的有功功率全部由电源通过连接电感提供,谐波和无功功率由负载侧逆变器提供,即可实现负载电压的补偿和有源滤波功能;电源侧逆变器提供连接电感电流中的无功功率电流分量,实现电源供电功率因数的调节.仿真表明:电源电压发生跌落时,通过调节可在半个工频周期内将负载电压稳定为额定值;当负载电流中含有谐波和无功功率分量时,可将电源电流调节为与电源电压同相位的基频正弦波.更多还原

【Abstract】 In this paper,a new type of unified power quality conditioner was proposed,which can realize unified power quality conditioning similar to the traditional UPQC by connecting a set of three-phase reactor between the power source and the load,and connecting two inverters respectively to both ends of the reactor in parallel.The device is simple in structure and easy to control.The system control strategy is based on power control,and the basic idea is that the active power of the load under the rated voltage is supplied by the power supply through the connected inductor;the load required harmonic power and reactive power are supplied by the load-side inverter;thus the load voltage compensation and active filtering can be realized.The source-side inverter provides the reactive power current component of the inductor current and realizes the source power factor adjustment.Simulation results show that when the power supply voltage sag occurs,the load voltage can be compensated to rated value by the device in half fundamental frequency cycle;when the load current contains harmonic wave and reactive power components,the device can adjust the supply current to fundamental sinusoidal current in-phase with the source voltage.更多还原