说明：  单位功率因数矫正器(UPQC)由一系列的主动功率滤波器组成，可以调节分布式能源系统中的功率因数，该算法采用神经网络方法，实现功率因数的调节。
(A Unified Power Quality Conditioner (UPQC) is an integration of series and shunt active filters to improve power quality in a power distribution system. Model-based control of UPQC has attracted attentions in recent years, which aims to regulate the source current and the load voltage to the desired reference signals in spite of the existence of harmonic components in the supply voltage and the load current, possible sag or swell in the supply voltage, and variations in the load current. However,most of the previous studies did not take the control saturation )