大规模间歇式电源固态变压器并网混成最优控制研究 - 中国电工技术学会.docVIP

大规模间歇式电源固态变压器并网混成最优控制研究* 2 国网湖南省电力公司检修公司，湖南省 长沙市 410004）摘要：针对光伏发电、风力发电等间歇式电源的电力电子并网逆变器无转动惯量和阻尼特性的固有缺陷和发电过程的随机性、波动性、非纯一性的非线性动态系统特性，提出了固态变压器并网策略及其混成优化控制方法。深入阐述了带故障限流保护装置的固态变压器的主电路拓扑结构和工作原理，详细探讨了间歇式电源固态变压器并网系统的混成特性，系统分析论述了大规模间歇式电源固态变压器的混成优化控制模型和控制规律，并进行仿真实验。仿真结果验证了所述方法的正确性和有效性。理论分析和仿真实验显示基于混成优化控制的大规模间歇式电源固态变压器是一种集多功能于一身的理想并网技术，很好地解决了大规模间歇式电源并网系统的电压稳定、电能质量保证和短路电流限制等问题，具有很好的发展应用前景。 关键词：间歇式电源；固态变压器；并网；混成系统；优化控制；风力发电；光伏发电 Study on Hybrid Optimal Control of Grid-connection of Large-scale Intermittent Power Supply Based on Solid-state Transformer Su Shiping1,Liu Guiying1 , Yanglijiao1, su yuankai1，2， (1 School of Electrical and Information Engineering Changsha University of Science and Technology, Changsha 410004；2 State Grid Hu-Nan Electric Power Corporation Maintenance Company) Abstract：According to the hybrid characteristics of grid-connected photovoltaic（PV） generation system with nonlinearities, uncertainties, heterogeneous characteristics, the hybrid control method of PV generation grid-connection is discussed deeply. The basic theory of hybrid control is elaborated and the hybrid characteristics of grid-connected PV generation system are analyzed, and then the basic principle of the hybrid control for maximum power point tracking(MPPT) and the output of grid-connected inverter are analyzed in detail, and control rule model of hybrid controller for single-phase PV generation rid-connection based on hybrid automata is established, and finally simulation experiment is conducted. Simulation results show that the control method is correct and effective. This hybrid control strategy faithfully reflect the actual behavior characteristics of grid-connected PV generation operation and it is an ideal control method for the grid-connection of PV generation and provide a new option for the control of grid-connected PV generation.. Keywords: intermittent power supply; solid-state transformer; grid-connection; hybrid system; optimal control; wind power generation; photovoltaic gen