The Design And Research Of APQC Active Power Quality Control Device

With the application of new technology, automation and intelligent level of power equipment have been greatly improved, more and more people choose to use high-tech equipment with high precision, high performance and high efficiency, these devices are more strict requirements on power quality. The reactive power compensation and harmonic suppression to improve power quality is undoubtedly one of the most effective methods. The dynamic power quality control(APQC) has the advantages of high reliability, fast response speed, low loss low harmonic characteristics are widely used. This paper mainly introduces the structure of APQC system.As in the real power load to present inductive reactive power, passive filter mainly played a role of compensation. Insulated gate bipolar transistor APQC device(IGBT) and compensation regulation will inject a large amount of harmonics to the system, so in the design of passive filter also need to take into account the filtering effect of APQC system. This paper is based on the harmonic analysis of IGBT injection, designed the corresponding LCL filter, and the effect of filter simulation.Study the harmonic detection of APQC device and reactive power compensation control method, based on the instantaneous reactive power theory, using P-Q method, IQ IP method is derived from harmonic current detection. In the DC side voltage by PI control, repetitive control strategy in current loop. According to the above research, this paper established the simulation model of APQC device with PSIM simulation software, and the simulation model is verified by simulation. The simulation results show that the simulation model can effectively suppress the harmonic in the power system, to verify the feasibility of this paper.Based on the above research, the content of this paper is put into practice in the development, has achieved good results in the compensation of harmonic treatment.