Active Power Quality Controller Program Based On All-phase FFT

In recent years, transistor, IGBT and other non-linear power devices have beenused much more widely, so that more energy has been fully utilized. However, thesenon-linear characteristics of power electronic devices has also makes the grid voltageand current distortion, which makes power quality distortion increasingly seriouspollution problems, the security of the power system, causing great economicoperation. Particularly harmonic and imbalance problems caused widespread poweroutages, system failures or even switch tripping accidents are common, so the qualityof the comprehensive management of the power system has become a research topicof great practical significance.According to the software engineering application requirements in embeddedsystems, this paper analyzes the Active Power Quality Control device backgrounddemand, working principle, hardware structure, control processes, real-time samplingand calculation principles and production processes constitute, discussion the relatedtechnologies, designed the software architecture and its implementation modules,finally proved the effectiveness of the system by the experimental data.This paper describes the Active Power Quality Control device, which use allphase Fourier transform harmonic detection method, is suitable for offset seriousharmonic rates changed little, the higher harmonics more occasions. The embeddedsystem is based on Texas Instruments the TMS320F28335chip development and thebackend control system is developed on Java language. The results computed by DSPgenerates the appropriate reverse current in the grid to offset the harmful current andimprove power quality. It is using the JBoss Drools rules engine control system in thebackground, to facilitate non-computer professional to modify the flow of control.