光伏与微型燃气轮机混合微网能量管理研究  

Energy Management Strategy of PV and Micro-Turbine Hybrid Micro-Grid

作　　者：周念成[1] 邓浩[1] 王强钢[1] 李春艳[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《电工技术学报》2012年第1期74-84,共11页Transactions of China Electrotechnical Society

基　　金：输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA10512709208);重庆市自然科学基金资助项目(CSTC2009BB6190)

摘　　要：在分析光伏发电和微型燃气轮机动态模型及运行特性的基础上,研究了光伏与微型燃气轮机混合微网能量管理策略。基于光伏与负荷功率波动的频率特性,提出了变步长时间序列法预测光伏与负荷功率,控制微型燃气轮机输出。为了保证混合微网运行的可靠性和提高蓄电池的运行效率和工作寿命,提出了模块化的储能蓄电池管理模型。混合微网并网运行时,利用可控的微型燃气轮机平滑光伏功率波动,使混合微网成为一个可调度的功率源;孤岛运行时,储能蓄电池与微型燃气轮机共同补偿光伏与负荷功率的差额,实现微网的稳定运行。采用PSCAD/EMTDC和Matlab联合仿真,证明了本文提出的能量管理策略的正确性,同时可有效减小储能设备配置容量。The dynamic model and operating characteristics of photovoltaic and micro-turbine generation system are analyzed,and the power management strategy of PV and microturbine hybrid micro-grid is proposed.The time series method with variable steps is adopted to predict the power of PV and load based on the frequency characteristics of corresponding fluctuation,and the output powers of micro-turbine on grid-connected and islanding mode are controlled by the predicted result.In order to guarantee the reliability of hybrid micro-grid and improve the efficiency and lifespan of batteries,a modular control mode for battery management is proposed.When the micro-grid operated on the grid-connected mode,the controllable micro-turbine is used to smooth the photovoltaic power fluctuation and makes the hybrid microsource becoming a scheduled power source.When the micro-grid operates on the islanding mode,the storage battery which responses the rapidly changing power together with micro-turbine compensate the power difference between PV and load,and this could realize the stable operation of micro-gird.The PSCAD/EMTDC and MATLAB software are used for simulation and verification.The results show that the proposed technique is effectively for energy management of the hybrid micro-grid and can reduce the capacity of storage devices.

关 键 词：微网 光伏 微型燃气轮机 能量管理 时间序列法 

分 类 号：TM611.24[电气工程—电力系统及自动化] TM615