锂电池组储能的混合动力RTG系统设计

锂电池组与柴油机构成的混合动力起重机系统是港口节能减排的一项重要技术。针对起重机再生制动能量的回收,设计了双向DC-DC变换器来实现锂电池组储能系统的两种工作模式(再生制动模式和锂电池组放电模式);对双向DC-DC变流器升压工作方式设计了双闭环控制器,降压工作方式设计了电流环和电压环两种控制器,并进行了对比,从而实现了对锂电池组储能系统充、放电过程和不同运行模式间切换过程的控制。运用PLECS搭建了系统仿真模型,仿真结果表明,在制动能量回收过程中,采用电压环控制器可以实现较高效率的制动能量回收。

Design of rubber tyred gantry crane hybrid power system with lithium battery pack energy storage device

The hybrid power system of rubber tyred gantry crane（RTGC）,which consists of a lithium battery pack and a diesel engine,is important for energy conservation and emission reduction in the port. To solve the problem of energy storage in the backing mode of RTGC,a bidirectional DC-DC converter was designed to achieve two operating modes（regenerative braking mode and lithium battery pack discharge mode） of lithium battery pack storage device. A double closed-loop controller was de-signed for the boost operating mode of bidirectional DC-DC converter. Two controllers with a current loop and voltage loop was designed for the buck operating mode of the bidirectional DC-DC converter. With the controllers,the control of lithium battery pack storage system was realized in the charging,discharging and switching process of the different modes. The PLECS is used to build a simulation model of the system. The simulation results show that the voltage loop controller can efficiently implement the braking energy recovery in the braking process.