Adaptive voltage detection controlled based single phase UPQC

This paper deals with a new control strategy for single phase UPQC based on a discrete system model. The single-phase unified power-quality conditioner (SP-UPQC) is treated as a typical switched linear system due to its typical switching dynamic characteristics. The performance of the UPQC mainly depends on control strategy used to generate reference current for shunt active power filter (APF) and generate reference voltage for series active power filter. An Adaptive Voltage Detection method by using neurons is presented here in which the amplitude and phase of system voltage can be obtained via online adaptive regulation of the neuron's parameters. Using the detected phase of the system voltage, the reference compensating current is calculated using instantaneous reactive power theory. The algorithm is simple and works properly even when the sinusoidal wave consists of harmonics.