一种可与市电并联的分布式发电储能离网逆变器控制方法及应用  

The Control Method of a Distributed PV Energy Storage Off-line Inverter in Parallel with Grid and its Application

作　　者：孙玉鸿 严蕾[2] Sun Yuhong;Yan Lei(Shanghai Surpass Sun Electric Co., Ltd, Shanghai 200331;Shandong Survey and Design Institute of Water Conservancy, Ji＇nan 250014)

机构地区：[1]上海追日电气有限公司,上海200331 [2]山东省水利勘测设计院,济南250014

出　　处：《电气技术》2017年第12期157-162,共6页Electrical Engineering

摘　　要：本文提出了一种新的储能型分布式发电离网逆变器控制方案:当市电正常时,可并网运行,供给负载运行所需的大部分能量;当市电不正常时,快速切换到离网运行,确保重要负荷的不间断供电。方案采用双向BUCK-BOOST电路实现小容量分布式光伏发电离网或并网运行,从而优化并降低户用型光伏发电储能系统的配置成本,提高动力电池的综合利用率。通过调节光伏储能离网逆变并联市电输出的相位和幅值,使市电提供负载大部分功率的同时,该逆变器的并网电流和市电之间只存在给定的相位差,从而有效提高系统运行的功率因数。The paper proposes a novel control strategy for distributed energy storage off-line inverter. When the grid is normal, the inverter with the proposed control method can work in parallel with the grid and most load power consumption can be supplied by the grid. When the grid is abnormal, the inverter works in off-line mode quickly in order to supply power to important load uninterruptly. In the other hand, a BUCK-BOOST circuit with power double flow topology is used, therefore, small capacity power battery can satisfy the application in distributed energy storage system. Accordingly the cost of system hardware can be decreased, and the using efficiency of the energy storage battery can be increased. By way of adjusting the amplitude and phase of the output voltage and making the output current phase of the inverter deviate the given angle with the utility current, the electric energy of storage battery not only can be saved, the high power factor can be also be achieved for utility supply source.

关 键 词：储能 离网逆变器 市电 功率因数 光伏微网 

分 类 号：TM464[电气工程—电器]