基于二自由度内模控制的STATCOM对孤岛微电网电压稳定性的影响  

Influence of STATCOM Based Two-Degree-of-Freedom Internal Model Control on Voltage Stability of Isolated Micro-grid

作　　者：王迪 杨洪耕[1] WANG Di;YANG Hong-geng(College of Electrical Engineering and Information Technology, Sichuan University, Chengdu 610065, China)

机构地区：[1]四川大学电气信息学院,四川成都610065

出　　处：《水电能源科学》2018年第6期182-186,共5页Water Resources and Power

摘　　要：鉴于含静止同步补偿器(STATCOM)的微电网孤岛运行时电压的稳定性是微电网未来发展面临的主要问题之一,针对孤岛微电网中的STATCOM设计了一种基于二自由度内模控制的控制器代替传统PI控制器,通过参数整定同时提高STATCOM的跟踪性能和鲁棒性,从而稳定孤岛微电网电压,通过建立阻抗模型,利用阻抗法分析两种控制方法的STATCOM对孤岛微电网电压稳定性的影响,并进行仿真验证。结果表明,与PI控制相比,基于二自由度内模控制的STATCOM可有效提升孤岛微电网电压的稳定性。One of the main problems in the future development of microgrid is the voltage stability of isolated microgrid with STATCOM. In this paper, a two degree of freedom internal model control （2DOF IMC） controller, which can improve the tracking performance and robustness of STATCOM, was designed to replace the traditional PI controller in STATCOM for stabilizing voltage of microgrid. The impacts of STATCOM with the two controllers on the voltage stability of isolated micro grid were analyzed by impedance method. The simulation results show that the STATCOM with 2DOF IMC controller can improve the voltage stability of microgrid effectively.

关 键 词：静止同步补偿器 微电网 稳定性 内模控制 阻抗模型 

分 类 号：TM712[电气工程—电力系统及自动化]