电力科技与环保2026，Vol.42Issue(1)：80-89,10.DOI:10.19944/j.eptep.1674-8069.2026.01.009
一种基于移相策略的电除尘器高频电源控制技术研究与应用
Research and application of an ESP high-frequency power supply control method based on phase-shifting strategy
摘要
Abstract
[Objective]The high-frequency power supply of electrostatic precipitator usually adopts LCC resonant converter structure and frequency conversion control mode.Under the condition of light load,the transformer core saturation phenomenon is easy to occur,which leads to the surge of resonant current and other problems,resulting in the impact damage of key components such as insulated gate bipolar transistor(IGBT)and resonant capacitor,which has become the difficulty of research and design in this field.In order to solve this problem,this paper proposes an asymmetric control method based on phase shift strategy.[Methods]In this paper,the mathematical model of core saturation and resonant current of high frequency power supply transformer is established.The limitation of traditional frequency conversion control mode in light load is analyzed.The phase shift control strategy is used to adjust the phase relationship of transformer drive signal in real time.On the premise of keeping the original circuit topology and parameters unchanged,the effective suppression of resonant current and the optimal control of flux reset process are realized.[Results]The research shows that the proposed phase shift control strategy not only maintains the original soft switching characteristics of the transformer,but also reduces the resonant current and effectively solves the magnetic saturation problem of the transformer under light load conditions.At the same switching frequency,the output voltage decreases from 76.4 kV to 38.4 kV under light load conditions,with a decrease of 49.7%.The resonant current decreases from 881 A to 690 A,with a decrease of 21.7%.The maximum magnetic flux density is limited to 0.16 T,and there is no magnetic saturation.The engineering application shows that the scheme runs continuously for 6000 h in the electrostatic precipitator of a factory,and there is no breakdown fault caused by magnetic saturation in the key components such as IGBT.The flashover frequency of the electric field of the dust collector is reduced from 3-28 times/min to 0-1 times/min,and the reliability of the system is significantly improved.[Conclusion]The scheme proposed in this paper has the advantages of zero hardware transformation cost,convenient operation and flexible control.It is especially suitable for environments with complex working conditions such as coal-fired power plant,steel and chemical industry,and provides a new idea for the anti-saturation design of high frequency power supply.关键词
电除尘器/高频电源/变压器磁芯饱和/谐振电流/移相控制Key words
ESP/high-frequency power supply/transformer core saturation/resonant current/phase-shift modulation分类
能源科技引用本文复制引用
刘宇芳,凌雁波,易辉,徐芳..一种基于移相策略的电除尘器高频电源控制技术研究与应用[J].电力科技与环保,2026,42(1):80-89,10.基金项目
江苏省基础研究计划重点项目(BK20243045) （BK20243045）
低碳智能燃煤发电与超净排放全国重点实验室开放课题项目(D2024FK151) （D2024FK151）
