光储微电网运行特性及影响因素分析  

Operating characteristics and influencing factors of photovoltaic-storage microgrid

作　　者：杨占刚[1] 徐玉磊[1] 王成山[2] 武震[2] 

机构地区：[1]中国民航大学航空自动化学院,天津300300 [2]天津大学智能电网教育部重点实验室.天津300072

出　　处：《电力自动化设备》2014年第10期15-20,共6页Electric Power Automation Equipment

基　　金：中央高校基本科研业务费专项资金资助项目(ZXH-2012C006);中国民航大学科研启动基金资助项目(2011-QD02X)~~

摘　　要：建立了一个光伏发电微电网测试平台;系统以蓄电池为储能装置,并通过双向逆变器并入微电网,用以维持微电网的暂态功率平衡。当微电网联网运行时,以外电网电压和频率为参考,蓄电池双向逆变器、光伏并网逆变器采用定功率控制;孤岛运行时,双向逆变器的控制策略切换为定电压、定频率控制,用以提供微电网电压和频率参考。实验结果表明,该系统可以稳定地工作在联网模式和孤岛模式,光伏发电功率波动及负荷波动均不会影响微电网的稳态运行,蓄电池的荷电状态对微电网的稳态孤岛运行以及联网和孤岛之间的切换有重要影响。A test platform of photovoltaic power generation microgrid is built,which adopts a battery as its energy storage device and connects it via a bi-directional inverter to maintain the transient power balance.In grid-connecting mode,both the battery bi-directional inverter and the photovoltaic grid-connecting inverter are under the constant power control with the grid voltage and frequency as the references;in islanding mode,the battery bi-directional inverter is under the constant voltage and frequency control to provide the voltage and frequency references for the microgrid. Experimental results show that,the system can stably operate in both operating modes;its steady-state operation is not affected by the fluctuation of photovoltaic power and load;the SOC（State Of Charge） of battery has important influence on its steady-state operation in islanding mode and the mode switching.

关 键 词：光伏 发电 储能 蓄电池 微电网 逆变器 联网运行 孤岛运行 荷电状态 控制 

分 类 号：TM615[电气工程—电力系统及自动化] TM727