The Study Of Control System Of Three-phase Electrostatic Precipitation Power Supply

The electrostatic precipitator, as its characteristic of high effective air pollution control ,low resisitance and being convenient to process gas of great amount and high temperature, has been widely used in power, metallurgical, building materials industry and so on. With the increasing of environmental requirements and the progressively elevation and application of industry control level in electrical. To achieve the country's latest atmospheric emissions standard, the development of a highly efficient, energy-saving high-voltage electrostatic precipitator power is of great significance. In addition, the three-phase power system has poured in new power to improve the efficiency of electrostatic precipitator. It also provide powerful guarantee for energy conversation and carbon emission reduction to satisfy environmental protection emission standards.The main work of the task is to develop the three-phase electrostatic precipitator high voltage control system with microcomputer controller as the core. The working principle of the circuit is that the power controller gets the first and secondary sampling signals and sends to the CPU, based on these, to adjust the changes of SCR trigger angle. In this way, three-phase SCR control circuit would realize phase-shifted full-controlled voltage regulate, and then by the three-phase step-up transformer, Finally, puts the secondary rectification DC signal into ESP in order to realize the electric field that control the dust. With carrying out a large number of experimental debuggings, the paper gives out the experimental results and analytical conclusions with regard to design and connection of transformer of the system of electrostatic precipitator based on practice of scientific research.