【摘要】 针对超级电容储能系统的非线性和输入输出扰动大等问题,基于直流变换器固有的开关特性,分别提出了系统在充、放电状态下的滑模变结构控制方法。在Boost模式下利用非线性系统的微分几何理论,建立反馈精确线性化模型并设计滑模变结构控制器;在Buck模式下以系统控制目标为基础提出分段滑模控制算法。研究结果表明,相比传统PID控制,滑模变结构控制具有更好的动态响应及鲁棒性,在输入端电压或负载大幅度波动的情况下,输出仍能保持恒定和较低的纹波系数,提高了超级电容储能系统的抗干扰能力。更多还原

【Abstract】 The sliding mode control methods of charging and discharging system were proposed based on the inherent switching characteristics of DC-DC converters, considering that the supercapacitor energy storage system has large input-output perturbations and system nonlinear problems. Two resolutions were proposed: in Boost mode,the differential geometry of nonlinear systems were adopted, and the state feedback precise linearization scheme and the sliding mode controller were designed; in Buck mode, the segmentation sliding mode control algorithm was adopted to control the target system. The results show that, compared to traditional PID control, sliding mode control has better dynamic response and robustness. The output remains constant and low ripple coefficient with the input voltage or load volatile and it improves the anti-jamming capability of supercapacitor energy storage system.更多还原