摘要
基于分布式电源并网的增多使得孤岛现象发生的可能性和对系统用户的影响越来越大,在分析电压相位突变检测法的基础上,阐述一种改进型主动电流扰动法。针对电压相位突变检测法检测时间短,但在阻性负载下检测失效,而改进型主动电流扰动法虽然能实现无盲区检测,但必须在扰动时刻到达时才能检测出孤岛的发生等问题,提出一种基于电压相位突变检测与改进型主动电流扰动法相结合的新型组合式孤岛检测方法。仿真试验结果表明:新型组合式检测方法实现了快速性与无盲区检测的统一。
With the development of distributed generation grid-connected, the possibility of the island phenomenon and the influence on the system user has become greater. According to phase jump detection methods, a kind of improved active current disturbing was described. Considering the fact that the phase jump detection has short test time, but fails to work under resistive load, and improved active disturbing can be detected in blind area, but only detect the occurrence of islands in the disturbance moment arrives, a new combined islanding detection method was proposed based on phase jump and when the improved active current disturbing combination of grid-connected system. The simulation results show that the new combined detection method realizes the unity of rapidity and no blind area detection.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2012年第7期2662-2667,共6页
Journal of Central South University:Science and Technology
基金
广东省科技计划项目重大科技专项(2010A080804023)
湖南省自然科学基金资助项目(2011JJ5027)
湖南省科技计划项目(2011GK3118)
关键词
分布式发电
并网逆变器
孤岛检测
distributed generation
grid-connected inverter
islanding detection
