Research On Phase-controlled Series-parallel Power Supply For Electrostatic Precipitator

Electrostatic Precipitator is well-known as the most efficient dust removal equipment around the world. The characteristics of its power supply have a direct relationship with the dust removing efficiency. With the improvement of the national dust emission standard, Traditional single-phase phase-controlled power supplies cannot meet increasingly strict needs, so it is necessary to develop a new type of power supply. High-frequency switching mode power supply, which has a smaller size, higher dedusting efficiency and higher efficiency electric energy, is a new trend in the near future.Firstly, the basic principle of electrostatic dedusting is analyzed in this paper, so is the development of power supplies for electrostatic precipitator home and abroad, the MATLAB software, and the research target.Secondly, theories about soft switching technology and analog PID control are introduced and discussed.Thirdly, based on the analysis of the engineering model of high voltage high frequency high power transformer and the advantages and disadvantages of existing high frequency resonant topology, a phase-controlled series-parallel resonant converter is put forward as main circuit topology, its working principle and modeling method is analyzed, too. and a60kV/60kW phase-controlled series-parallel resonant converter is designed and modeled by using the MATLAB software.Finally, according to the method presented before a100V/100W phase-controlled series-parallel converter is designed and its power level transfer function model is established, simulation model is built by using Simulink, and the closed-loop control PI parameters is set by stability boundary method and verified by simulation, the simulation results show that the system has a quick dynamic response and a high steady-state precision. In addition, according to the results of the simulation of100V/100W phase-controlled series-parallel resonant converter, the main components are selected, and control circuit, the driver circuit, protection circuit, auxiliary power supply circuit are designed, some related experiment waveform are given.