大电压比双向变流器的软启动策略  

Soft Start-up Control Strategies of Bi-Directional Converter with High Voltage Ratio

作　　者：徐驰[1] 王宇翔[1] 顾云杰[1] 李武华[1] 何湘宁[1] 

机构地区：[1]浙江大学电气工程学院,杭州310027

出　　处：《电工技术学报》2016年第6期155-161,共7页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51361130150;51277195)

摘　　要：在现有的双向DC-DC变流器启动中,通常需要额外的启动电路来限制启动冲击电流幅值,不仅降低了系统的效率,而且增大了系统的成本。在分析启动冲击电流产生机理的基础上,提出了两种软启动的优化控制策略:占空比控制启动法和移相角控制启动法。这两种控制方法均无需添加辅助电路,并且能有效地抑制冲击电流的幅值,从而确保变流器的安全启动。对两种控制方法的工作模态进行了详细的理论分析和公式推导,并通过仿真和实验验证了软启动控制策略的有效性,为双向变流器的软启动提供了一种简单、安全和经济的方法。In existing methods for start-up of bi-directional DC-DC converter, an extra start-up circuit is required to limit the surge current, which not only decreases the efficiency but also increases the cost. In this paper, the generation mechanism of the surge current is analyzed, and then two soft start-up control strategies are proposed, i.e. duty cycle control and phase shift control. Accordingly, without an auxiliary start-up circuit, the converter can safely start up with controllable peak current value. Detailed analysis and formula derivation of each scheme in different operation modes are presented. The simulation and experimental results verify the effectiveness of these two schemes, providing a simple, safe and economic way for soft start-up.

关 键 词：双向DC-DC变流器 软启动 占空比 移相角 冲击电流 

分 类 号：TM461[电气工程—电器]