电力系统自动化2017，Vol.41Issue(22)：116-123,8.DOI:10.7500/AEPS20170524002
基于闭环锁频控制的并网逆变器孤岛检测方法
Island Detection Method Based on Closed-loop Frequency-locked Control for Grid-connected Inverters
摘要
Abstract
Island detection is one of the frontier issues in the field of distributed grid.Aiming at the problem of large non-detected zone in traditional passive detection method,the control algorithm of current non-detected zone passive detection method is too complicated,by analyzing the principle of frequency tracking in closed-loop frequency-locked control,the high-frequency impedance characteristics of grid-connected inverter controlled by closed-loop frequency-locked control are studied.By discussing the load impedance characteristics of various islanding conditions,a new passive island detection method is proposed,which uses the output frequency of the closed-loop frequency-locked control method directly,preventing the occurrence of the island by adding high-frequency impedance detection.Simulation and experimental results show that the passive island detection method proposed is able to detect the inverter disconnection situation quickly and accurately,can also eliminate non-detection zone,and avoid the complicated problem of control algorithms.关键词
并网逆变器/孤岛检测/闭环锁频控制/高频阻抗Key words
grid-connected inverter/island detection/closed-loop frequency-locked control/high-frequency impedance引用本文复制引用
刘新天,冯嘉骏,何耀,郑昕昕,曾国建..基于闭环锁频控制的并网逆变器孤岛检测方法[J].电力系统自动化,2017,41(22):116-123,8.基金项目
This work is supported by National Natural Science Foundation of China (No.51607052).国家自然科学基金青年基金资助项目(51607052). （No.51607052）
