Development of a comprehensive power quality controlling device for power distribution system

A combined harmonics and non-active power compensation circuit structure of a resonant impedance type hybrid active power filter (RITHAF) with injection circuit and a static Var compensator (SVC) is proposed in this paper, which named comprehensive power quality controlling device. The model of the comprehensive power quality controlling device is educed in detail, it can be found from the model that the comprehensive power quality controlling device has the advantages of harmonic currents elimination and reactive power compensation. Based on the analysis of the model, a voltage close loop control approach was used correspond to thyristor controlled reactor (TCR) and a new synthesis hysteretic control method which combines the speedy performance of traditional hysteretic control with the zero steady state error of double harmonics integrators was adopted according to RITHAF. At the same time, a simulation using PSCAD and a experiment in the lab was carried out, and the feasibility of the comprehensive power quality controlling device is verified by the model and simulation and experimental results, which has a wide use in engineering.