Modelling and Simulation of PQ Disturbance Based on Matlab

In recent years, PQ (power quality) problem makes quality of power supply drop, which even triggers power accident, so PQ has attracted widespread attention. To improve and increase PQ, it needs to analyze and research on PQ disturbance systematically. The paper establishes models of short-term voltage change and harmonic disturbance with the method of setting fault and changing load based on simulation platform of Matlab. The simulation of the model gets wavelet of short-term voltage change and harmonic disturbance, the waveform is analyzed through Flourier transform. The simulation results and the theoretical analysis show that the model in this paper could simulate the voltage change and harmonic disturbance well, which can provide data and basis for detection and identification of PQ and further control measures.