基于积分滑模的孤岛微网电压控制策略
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摘要
孤岛型微电网由于其本体容量小,且缺少外部大电网的支撑,因此在使用主从控制的微电网中,主电源侧必须使用电压型控制策略。设计了一种基于矢量控制的积分滑模控制器,意在解决孤岛微电网中的三相电压稳定问题。推导了孤岛型微电网的数学模型,基于此模型利用积分滑模控制方法设计了控制器,并利用李雅普诺夫稳定性理论验证了系统的稳定性。利用MATLAB/SIMULINK进行了仿真,仿真显示系统输出电压在负载变化及参考电压突变的情况下都能稳定地跟踪参考电压,验证了控制器的有效性。
Due to the small capacity and for the lack of support from external large power grids, islanded micro-grids adopt the voltage-based control strategy in the master-slave control microgrid. In this paper, an integral sliding mode controller based on vector control is designed to solve the stability problem of three-phase voltage in the islanded micro-grid. Firstly, the mathematical model of an islanded microgrid is deduced. Based on this model, the controller is designed by integral sliding mode control method, and the stability of the system is verified by Lyapunov stability theory. The simulation by MATLAB/SIMULINK shows that the output voltages of the system can track the reference voltage stably when the load and reference voltage changes, which verifies the effectiveness of the controller.
Due to the small capacity and for the lack of support from external large power grids, islanded micro-grids adopt the voltage-based control strategy in the master-slave control microgrid. In this paper, an integral sliding mode controller based on vector control is designed to solve the stability problem of three-phase voltage in the islanded micro-grid. Firstly, the mathematical model of an islanded microgrid is deduced. Based on this model, the controller is designed by integral sliding mode control method, and the stability of the system is verified by Lyapunov stability theory. The simulation by MATLAB/SIMULINK shows that the output voltages of the system can track the reference voltage stably when the load and reference voltage changes, which verifies the effectiveness of the controller.
引文
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[2]李潇雨,黄珂. 分布式能源发展政策研究文献综述[J]. 华北电力大学学报(社会科学版), 2015,(1):20-25.
[3]LEW D,ASANO M,BOEMER J,et al. The power of small: the effects of distributed energy resources on system reliability[J]. IEEE Power and Energy Magazine, 2017, 15(6): 50-60.
[4]黎禧. 面向孤岛模式的光伏微网同步方法研究[D]. 桂林: 广西师范大学, 2015.
[5]欧阳丽,葛兴凯. 海岛智能微电网技术综述[J]. 电器与能效管理技术, 2014 (10): 56-59.
[6]张先勇,舒杰,吴昌宏,等. 一种海岛分布式光伏发电微电网[J]. 电力系统保护与控制, 2014, 42(10): 56-61.
[7]鲁斌,衣楠. 孤岛模式下微电网自趋优分布式无功电压控制策略[J]. 电力系统自动化, 2014, 38(9): 218-225.
[8]任洪波,邱留良,吴琼,等. 分布式能源系统优化与设计综述[J]. 中国电力,2017,50(7):49-55.
[9]陈丽娟. 微电网中分布式电源的协调控制与优化研究[D]. 上海:上海电机学院,2016.
[10]穆效江,陈阳舟. 滑模变结构控制理论研究综述[J]. 控制工程,2007(S2):1-5.
[11]DELGHAVI M B,SHOJA-MAJIDABAD S,YAZDANI A. Fractional-order sliding-mode control of islanded distributed energy resource systems[J]. IEEE Transactions on Sustainable Energy, 2016, 7(4): 1482-1491.
[12]吴宇,皇甫宜耿,张琳,等.大扰动Buck-Boost变换器的鲁棒高阶滑模控制[J]. 中国电机工程学报,2015,35(7):1740-1748.