基于高频高压电除尘用LCC谐振电源特性的网侧整流方式比较

发布时间：2018-02-26 08:04

本文关键词： LCC谐振电源双脉冲模式调压特性谐振电流峰值整流器　出处：《电力自动化设备》2017年05期 　论文类型：期刊论文

【摘要】：高频电除尘电源系统由网侧整流器和高压电源组成。高压电源采用LCC谐振变换器,其工作于双脉冲模式时更利于控制,基于该模式下电路模型,详细推导了各时间段解析表达式,确定了输出限制条件。通过建立功率平衡方程并定义电压传输系数、等效负载系数及频率系数建立三者间数学关系并绘出相应关系曲线作为后级参数设计依据。深入分析后级工作特性并证明在临界频率下调节母线电压的调压特性比断续模式下调频调压的更好,高压侧输出电压在最大值以下调节时谐振电流峰值大幅减小。为对比不同整流设备与后级特性匹配的差异并解决目前高频电除尘电源系统因普遍采用三相二极管整流器作为前级而给电网带来的谐波注入问题,分别设计了近正弦输入电流整流器及PWM整流器作为入网设备,用Saber仿真软件对2个具有相同额定输出功率、电压的整机系统特性进行对比分析,结果验证了特性分析的正确性并证明PWM整流器因其直流母线电压可控且可调从而能更佳地匹配电除尘电源系统后级工作特性。
[Abstract]:The high frequency electric dusting power supply system is composed of a grid-side rectifier and a high voltage power supply. The high voltage power supply adopts LCC resonant converter, which works in double pulse mode and is more convenient to control, based on the circuit model in this mode. The analytical expressions for each time period are derived in detail, and the output limiting conditions are determined. By establishing the power balance equation and defining the voltage transmission coefficient, The mathematical relationship between the equivalent load coefficient and the frequency coefficient is established and the corresponding curve is drawn as the basis for the design of the back stage parameters. The working characteristics of the latter stage are deeply analyzed and the voltage regulation characteristics of regulating the bus voltage at critical frequency are proved. Better than frequency modulation in intermittent mode, The peak value of resonant current decreases significantly when the output voltage of high voltage side is adjusted below the maximum. In order to compare the difference between the characteristics of different rectifier equipment and the back stage and to solve the problem of three-phase diode being widely used in the current high frequency electrostatic precipitator power supply system. The harmonic injection problem brought by rectifier as the front stage to the power network, The near sinusoidal input current rectifier and the PWM rectifier are designed as the equipment to enter the network respectively. The characteristics of two whole machine systems with the same rated output power and voltage are compared and analyzed by Saber simulation software. The results verify the correctness of the characteristic analysis and prove that the PWM rectifier can better match the working characteristics of the rear stage of the electric dust collection power supply system because of its controllable DC bus voltage and adjustable DC bus voltage.
【作者单位】：重庆大学输配电装备及系统安全与新技术国家重点实验室;重庆赛力盟电机有限责任公司;
【基金】：输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA10512713302)~~
【分类号】：TM461

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