DC/DC变换器并联均流技术

开关电源多模块并联系统发挥了分布式电源供电大容量、高效率和低成本等优势,同时提高了整个电源系统的可靠性,实现平均分配各模块负载电流的并联均流技术是开关电源模块并联的关键技术之一。常用DC/DC并联均流技术有无源法与有源法,有源法依据输出电压调节方式和均流母线产生方式不同而有多种组合控制方法。对目前电源并联均流技术原理、主要均流方法进行分析,综述无主模块均流控制和无均流线控制等新型均流策略,指出并联均流技术朝着智能化、数字化方向发展的趋势。

Current Sharing Technologies of Paralleled DC/DC Converters

Paralleled DC/DC converters can achieve the expansion of capacity limberly, enhance the reliability of the whole power system and realize large capacity, high efficiency and low cost of the distribution resource. The current-sharing is one of the key technologies in Paralleled DC/DC converters to distribute the load current equally. Common current-sharing technologies are divided into passive and active methods. With different kinds of output voltage regulation and different means of current sharing line production, several control methods are proposed in the active methods. The principle of current sharing technologies and main current-sharing methods are systematically analyzed, some new current-sharing methods which include masterless modular current-sharing （MMCS） technique and no current share line control are summarized. The technology of current sharing tends toward the direction of digitalization and intellectualization with digital control.