一种基于改进下垂法的随机交错电流分配Boost变换器  

A Randomly Interleaved Current Distribution Boost Converter Based on Modified Droop Approach

作　　者：史旺旺[1] 刘超[2] 冯均永[1] 

机构地区：[1]扬州大学能源与动力工程学院,江苏扬州225009 [2]扬州大学江苏省水利动力工程重点实验室,江苏扬州225009

出　　处：《电源学报》2012年第3期81-85,90,共6页Journal of Power Supply

基　　金：江苏省重点实验室开放课题(05318733431);江苏省科技支撑计划项目(BE2010699)

摘　　要：针对下垂法输出电压降低的问题,在Boost电路非线性控制的基础上提出了改进下垂法的DC-DC并联技术。控制系统采用三环控制和滑模变结构控制使各模块根据输出电压下垂程度同时调节,补偿输出电压的下垂。引入随机技术可以实现各模块交替调节,提高了系统的稳态特性。各模块电流按一定比例进行分配,提高了系统的灵活性。通过仿真验证了系统具有良好的稳态精度和瞬态响应。A modified droop approach in parallel-connected DC-DC converters based on the nonlinear control for Boost circuit was proposed to compensate the output voltage drop in droop approach. Three-loop control method and sliding mode control were adopted to compensate the decline of the output voltage in the control system and to regulate the output voltage according to the degree of decline. The randomly interleaved technique made the modules regulate the output voltage alternatively and improved the steady-state characteristic of the system. The currents were distributed by a certain ratio which improved the flexibility of the system. A better static and dynamic response characteristic were verified through simulation.

关 键 词：BOOST 交错并联 下垂法 电流分配 

分 类 号：TM46[电气工程—电器]