直流微电网自适应滑模控制策略
发布时间：2018-09-12 11:18
【摘要】：为提高微电网的稳定性,提出一种集自适应观测技术、滑模控制方法、定频PWM技术于一体的新型定频PWM自适应滑模控制策略,可在不需要增加额外传感器/硬件电路的情况下实现对状态变量的快速跟踪和调节,便于直流微电网内微电源和负荷的扩展与即插即用,且简化了滤波器的设计难度。同时,采用非线性复合控制方法在恒功率负载突变的情况下实现对母线电压和系统稳定控制的目标。初始状态的合理选择、变切换面的设计,使得状态变量全程处于滑动模态,并且抖振现象得以减轻。在包含光伏电源、燃料电池、蓄电池、双向Buck/Boost变换器、恒功率负载与阻性负载的直流微电网仿真环境中,验证了所提控制方法的有效性。
[Abstract]:In order to improve the stability of microgrid, a novel adaptive sliding mode control strategy for fixed frequency PWM (PWM) is proposed, which integrates adaptive observation technique, sliding mode control method and fixed frequency PWM technology. The state variables can be quickly tracked and adjusted without adding additional sensors / hardware circuits, which is convenient for the expansion and plug and play of micro power and load in DC microgrid, and simplifies the difficulty of filter design. At the same time, the nonlinear compound control method is used to achieve the goal of bus voltage and system stability control under the condition of constant power load abrupt change. The reasonable selection of the initial state and the design of the variable switching surface make the state variable stay in the sliding mode all the time and the chattering phenomenon can be alleviated. The effectiveness of the proposed control method is verified in the DC microgrid simulation environment which includes photovoltaic power, fuel cell, battery, bidirectional Buck/Boost converter, constant power load and resistive load.
【作者单位】： 上海交通大学电子信息与电气工程学院;
【基金】：国家自然科学基金资助项目(61374155) 高校博士点基金资助项目(20130073110030)~~
【分类号】：TM727
[Abstract]:In order to improve the stability of microgrid, a novel adaptive sliding mode control strategy for fixed frequency PWM (PWM) is proposed, which integrates adaptive observation technique, sliding mode control method and fixed frequency PWM technology. The state variables can be quickly tracked and adjusted without adding additional sensors / hardware circuits, which is convenient for the expansion and plug and play of micro power and load in DC microgrid, and simplifies the difficulty of filter design. At the same time, the nonlinear compound control method is used to achieve the goal of bus voltage and system stability control under the condition of constant power load abrupt change. The reasonable selection of the initial state and the design of the variable switching surface make the state variable stay in the sliding mode all the time and the chattering phenomenon can be alleviated. The effectiveness of the proposed control method is verified in the DC microgrid simulation environment which includes photovoltaic power, fuel cell, battery, bidirectional Buck/Boost converter, constant power load and resistive load.
【作者单位】： 上海交通大学电子信息与电气工程学院;
【基金】：国家自然科学基金资助项目(61374155) 高校博士点基金资助项目(20130073110030)~~
【分类号】：TM727
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