Research On High Frequency High Voltage And High Power Transformer For Electrostatic Precipitators

Along with the process of reform and opening up of China,various technologies have made great achievements.At the same time,the available resources and energy are becoming less,the environment is getting worse,the emissions of industrial waste gas and automobile exhaust gas are getting bigger and bigger,and air pollution and energy consumption are getting seriously.In order to achieve sustainable development,people pay more attention to energy saving and emission reduction.High-Voltage electrostatic precipitators can treat and recycle industrial dust effectively.Electrostatic precipitators are developing rapidly.Today,high-voltage high-frequency and high-power transformers as vital part of electrostatic precipitators which can handle industrial dust with high efficiency and low loss.More and more researchers are working on the development of this power supply.At high frequencies,the volume of the high-frequency high-voltage high-power transformers can be greatly reduced,which saves the material of the transformer and saves costs.The soft-switching technology is adopted to the high-frequency high-voltage high-power transformers of electrostatic precipitators,which effectively reduces the loss during operation of the power supply,improves the power density of the entire electrostatic precipitating power supply,expands the use range of the electrostatic precipitating power supply.The working life has greatly improved,raising dust extractor high effeciency and the transformers' utilization rate and efficiency have also been greatly improved.In these paper,the improved NSGA-II Algorithm is used to optimize the design of high-frequency high-voltage and high-power transformers.The structure of high-frequency high-voltage and high-power transformer is complex,the design parameters are numerous,and the parameters are closely related which restrict each other.Therefore,in the design process,these parameters should be comprehensively considered and compromised.When designing the transformer,it is desirable that the size of transformer is becoming smaller and the efficiency is becoming higher.For this reason,the two-dimensional and three-dimensional loss models of the windings are given respectively.Then the improved NSGA-II Algorithm is used to optimize the model,and using the optimized results to design the high-frequency high-voltage high-power transformer then comparing the designed transformer with the traditional AP-designed transformer.At high frequencies,the high frequency distribution parameters of the transformer cannot be ignored.These parameters are difficult to calculate by formula.Therefore,we use the numerical method finite element software Ansoft Maxwell to extract the high frequency parameters in the high frequency transformer.The topological structure of the interrupted current series-parallel circuit is modeled and theoretically analyzed,mathematically derived and summarized,and a mathematical expression that can describe the characteristics of the circuit is established.The obtained distribution parameters are used as the resonant components in the circuit,the distributed capacitance is used as the resonant capacitor in the topology,and the leakage inductance is used as the resonant inductor.The integrated design of the converter and the high-frequency transformer is carried out.The circuit is simulated by Simulink,and then compared with the theoretical analysis results to verify the simulation results.