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积分分离模糊PID算法在MPPT中的应用 预览

Application of Integral Separation Fuzzy PID Algorithm in MPPT
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摘要 光伏最大功率跟踪采用模糊PID 控制算法, 在PID 控制器中积分项I 的作用为消除稳态误差, 但是过度的积分调节可使系统稳定性降低、动态响应变慢.对此结合现有的PID 控制算法、模糊控制算法、模糊PID 算法中的优点,提出了一种基于积分分离的模糊PID 控制算法, 阐述了该方法的控制原理, 并给出了控制模型, 设计了分离系数的大小, 控制了积分项I 值的大小, 对分离系数进行判别使控制模式分为3 种, 即模糊PD 控制、半模糊PID 控制、完整模糊PID 控制, 通过对积分项I 的动态调节, 提高了系统的动态响应能力.最终, 结合整个光伏系统对传统模糊控制法、PID 控制法、模糊PID 控制法以及该方法进行静态和动态的仿真比较.结果表明, 积分分离模糊PID 算法具有响应速度快、超调量小和稳定性高的优点. Photovoltaic maximum power tracking adopts fuzzy PID control algorithm. In the PID controller, the role of the integral termI is to eliminate the steady-state error, but excessive integral adjustment can reduce the stability of the system and can slow the dy?namic response. Combining the advantages of the existing PID control algorithm, fuzzy control algorithm and fuzzy PID algorithm, afuzzy PID control algorithm based on integral separation is proposed. The control principle of the method is described and the controlmodel is given. The size of the separation coefficient controls the magnitude of the integral term I value. The discrimination of the sepa?ration coefficient makes the control mode be divided into three types: fuzzy PD control, semi-fuzzy PID control and complete fuzzyPID control. Through the dynamic adjustment of the integral term I, it improves the dynamic response of the system. Finally, com?bined with the entire photovoltaic system, the traditional fuzzy control method, PID control method, fuzzy PID control method and themethod are compared statically and dynamically. The results shows that the integral separation fuzzy PID algorithm has the advantages offast response, small overshoot and high stability.
作者 李宜伦 王胜辉 郑洪 高山 李锦秩 LI Yilun1, WANG Shenghui1, ZHENG Hong1, GAO Shan2, LI Jinzhi3(1. Institute of Electric Power, Shenyang Engineering College, Shenyang, Liaoning 110136, China;2. Liaoning Dongke Power Co., Ltd., Shenyang, Liaoning 110179, China;3. State Grid Dandong Power Supply Company, Dandong, Liaoning 118000, China)
出处 《东北电力技术》 2018年第8期1-6,共6页 Northeast Electric Power Technology
基金 国家自然科学基金项目(61372195)
关键词 光伏系统 最大功率跟踪 模糊控制 积分分离 photovoltaic system maximum power point tracking fuzzy control integral separation
作者简介 李宜伦(1991),男,硕士,主要从事光伏发电技术方面的研究.
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