摘要
孤岛检测是分布式光伏发电并网时存在的一个重要问题。在传统被动式孤岛检测方法和主动电流幅值偏移法的基础上,结合两者的优势,提出了一种新的复合式孤岛检测方法,并详细介绍了该方法的工作原理与实现过程。结合IEEE.Std.2000-929标准中的技术规范,对新方法进行了仿真和实验研究。仿真与实验结果表明,在逆变器输出与负载功率平衡且负载呈阻性时,新的孤岛检测方法不仅可以快速检测出孤岛、实现无检测盲区、不会影响电网质量,而且能够减小对光伏发电系统输出功率的影响。
Islanding detection is an important issue for the distributed grid-connected photovoltaic generation systems. Based on traditional passive islanding detection method and active current amplitude offset method and combining with their advantages, the paper puts forward a new composite islanding detection method, and introduces the principle and realization process of the method. According to the technical specifications of IEEE.Std.2000-929, simulations and experiments of the new method are carried out. The results show that, when the inverter output and the load power are balanced and the load is resistive, the new islanding detection method can detect islanding quickly, have no non-detection zone and little influence on the power quality. What is more, it can reduce the impact on the output power of photovoltaic generation systems.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2012年第11期122-126,共5页
Power System Protection and Control
基金
河南省重点科技攻关项目(102102310041)
关键词
孤岛检测
并网
逆变器
光伏发电系统
仿真
islanding detection
grid-connected
inverters
photovoltaic generation systems
simulation
