【摘要】 采用超级电容作为风机变桨系统后备电源,可提高变桨电源的可靠性、安全性和免维护性.提出了一种双向DC-DC变流器的超级电容充放电方案.对双向DC-DC变流器进行小信号建模,对系统进行了有、无PI控制器的稳定性比较,给定输入电压,通过调节PI控制器中的参数来获得期望电压和电流,对Buck与Boost两种工作情况进行仿真,验证能量双向PI控制的可行性.仿真结果表明,采用双向DC-DC变换器的PI控制参数设计,可以有效实现超级电容充放电控制.更多还原

【Abstract】 The reliability, safety and maintenance-free of power supply can be improved by using ultra-capacitor as backup power supply. A charging and discharging scheme of ultra-capacitor for bi-directional DC-DC converter is proposed. The bidirectional DC-DC converter is modeled with small signal, and the stability of the system with and without PI controller is compared. Given the input voltage, the expected voltage and current are obtained by adjusting the parameters in the PI controller. The two working conditions of Buck and Boost are simulated to verify the feasibility of the energy bidirectional PI control. Simulation results show that the design of PI control parameters of bidirectional DC-DC converter can effectively realize the charge and discharge control of ultra-capacitor.更多还原