基于MPPT的自适应孤岛检测算法  

AN ADAPTIVE ISLANDING DETECTION METHOD BASED ON MPPT

作　　者：周林[1] 郝高锋 解宝[1] 杜潇[1] 邵念彬 马卫[1] Zhou Lin, Hao Gaofeng, Xie Bao, Du Xiao, Shao Nianbin, Ma Wei(State Key Laboratory of Power Transmission Equipment ＆ System Security and New Technology, Chongqing University, Chongqing 400044, China)

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

出　　处：《太阳能学报》2018年第9期2553-2560,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金面上项目(51477021)

摘　　要：为保证分布式光伏发电系统安全稳定运行，针对现有基于MPPT的孤岛检测方法存在检测盲区，功率损耗大等问题提出基于MPPT的自适应孤岛检测算法。该算法通过对Boost升压电路占空比D进行周期性的扰动，实现对MPPT的扰动，进而影响光伏输出功率。占空比D的扰动量，由并网点电压实时计算得到，可有效减小功率损耗。该算法在进行参数设计时，考虑到最恶劣条件，可消除检测盲区。根据IEEE Std．929-2000的规定，对该文所提算法进行仿真和实验研究，验证该算法的有效性。For distributed PV power system security and stability, in view of existing islanding detection method based on MPPT exist non-detection zone, power consumption and other issues, an adaptive islanding detection method based on MPPT is proposed. The algorithm based on the periodic disturbance of duty ratio D of Boost circuit, to achieve disturbance of MPPT, thereby affecting the output power of PV. The disturbance of the duty ratio D is calculated by the real time public point voltage, which can effectively reduce the power loss. When the parameters are designed, the worst condition is considered, achieve without non-detection zone. According to IEEE Std.929-2000, the simulation and experiment results show that the proposed algorithm is correct and effective.

关 键 词：光伏发电 最大功率跟踪 孤岛检测 自适应 BOOST电路 检测盲区 

分 类 号：TM615[电气工程—电力系统及自动化]