摘要
柔性多状态开关(SOP)能够实现配电网馈线潮流灵活的调控,改善电压分布水平,提升配电网消纳分布式电源的能力,已成为配电网领域的一个研究热点。文中以三端口SOP为研究对象,建立了三端口SOP的数学模型。针对SOP数学模型体现出的非线性及强耦合的特点,通过坐标变换得到反馈线性化模型,对该模型设计了滑模控制器。文中将反馈线性化控制和滑模控制相结合,并用该复合控制取代传统比例-积分(PI)双环控制的电流内环,与传统PI双环控制相比,可以减少PI控制环节,降低PI参数整定的难度。根据SOP不同运行模式的要求,分别实现了各端口定直流电压和定无功功率模式、定有功功率和无功功率模式、定交流电压模式下的反馈线性化滑模控制算法。在MATLAB/Simulink中搭建三端口SOP仿真模型,仿真结果表明,与传统PI控制相比,所提出的控制策略动态性能好、鲁棒性强。最后,通过几种典型工况的仿真,进一步验证了所提控制策略的有效性。
Soft open point(SOP) has become a research hotspot in the field of distribution network, which can realize flexible regulation of feeder flow of distribution network, improve voltage distribution level, and promote the ability of distribution network to consume distributed generation. The three-port SOP is studied and the corresponding mathematical model is established in this paper. According to the strong coupling and nonlinearity of the mathematical model, the feedback linearization model is obtained by coordinate transformation, and the sliding mode controller is designed for the model. In this paper, the feedback linearization control and sliding mode control are combined, and the composite control is used to replace the current inner loop of the traditional dual closed-loop proportion-integral(PI) control. Compared with the traditional PI control, the composite control can reduce the PI control link and the difficulty in PI parameter setting. According to the requirements of different operation modes of SOP, the feedback linearization sliding mode control algorithm in constant DC voltage and reactive power mode, constant active and reactive power mode and constant AC voltage mode are realized, respectively. A three-port SOP system is built in MATLAB/Simulink,and simulation results show that the proposed control strategy has good dynamic performance and robustness compared to the traditional PI control. Finally, the effectiveness of the proposed control strategy is further verified by simulation of several typical operation conditions.
作者
张国荣
侯立凯
彭勃
李继红
陆翌
许烽
ZHANG Guorong;HOU Likai;PENG Bo;LI Jihong;LU Yi;XU Feng(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China;State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310000,China;Electric Power Research Institute of State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310014,China)
出处
《电力系统自动化》
EI
CSCD
北大核心
2020年第1期126-133,共8页
Automation of Electric Power Systems
基金
国家重点研发计划资助项目(2017YFB0903100)
国家电网公司科技项目(521104170043)~~
关键词
配电网
柔性多状态开关
反馈线性化
滑模控制
distribution network
soft open point(SOP)
feedback linearization
sliding mode control
