电力系统自动化2017，Vol.41Issue(6)：98-104,7.DOI:10.7500/AEPS20160701011
盲区小的燃料电池并网系统孤岛检测方法
Islanding Detection Method of Grid-connected Fuel Cell System with Smaller Non-detected Zone
摘要
Abstract
The function of islanding detection is required of the grid-connected fuel cell system to protect safety of equipment and humans and to maintain the quality of power supply.A novel active islanding detection method with short detecting time and small non-detected zone is proposed.This method is a combination of the adaptive slide mode frequency shift method that adds acceleration gain when frequency is drifted out of grid's operational frequency and the q-axis reactive current disturbance method.As the grid is disconnected,the islanding phenomenon is detected by making the frequency disturbance faster and drifting the frequency out of the allowed normal range to result in under/over frequency protection.Moreover,very small disturbance is added to the control signal in this method so that there is no negative impact on power quality when the grid works in the normal state.In the coordinates of Qf-f0 and Qf0-Cnorm ,the non-detected zone of the proposed method and two traditional methods are analyzed.Simulation and experimental results show that the method proposed is applicable to loads with high quality factor,shortens the time of islanding detection and is suitable for smaller non-detected zones in comparison to previous methods.关键词
燃料电池并网系统/逆变器/孤岛检测/滑模频率偏移法/无功电流扰动法/盲区Key words
grid-connected fuel cell system/inverter/islanding detection/slide mode frequency shift method/reactive current disturbance method/non-detected zone引用本文复制引用
张立炎,吴俊,陈启宏,全书海..盲区小的燃料电池并网系统孤岛检测方法[J].电力系统自动化,2017,41(6):98-104,7.基金项目
国家自然科学基金资助项目(61673306).This work is supported by National Natural Science Foundation of China(No.61673306). （61673306）
