基于降压型交流斩波电路的正弦波恒流调光装置研究

Research on Sine Constant Current Regulator Based on Buck Type AC Chopper

现行机场调光电源以晶闸管相控调光方案为主,电网侧功率因数低、负载侧谐波含量丰富、对挂网设备造成严重干扰。采用交流斩波技术的正弦波恒流调光装置拓扑结构简单,工作效率高,易于实现功率单元模块化。本文对基于降压型交流斩波电路的正弦波恒流调光装置进行了研究,分析了交流斩波电路的缓冲器特性和滤波参数设计方法,应用了一种易于实现的双向开关可靠换流技术,大大简化了系统实现。本系统网侧功率因数高、负载谐波含量低,具有较高的实用价值。

With low power factor and massive load distortion, thyristor phase-control constant current regulator imposes disturbance on other grid equipments. Sine constant current regulator based on ac chopper, with simpler topology and higher power density, is an upgrading solution for phase-control constant current regulators. The buffer characteristic and filter design procedure of sine constant current regulator based on buck type ac chopper is discussed in this paper, and a bi-directional switch commutation method is also utilized, simplifying the system implementation. The feasibility is proved by experiment.