TY - JOUR
T1 - Active Frequency Drift Islanding Detection Technology with Feedback of Load Impedance Angle
AU - Tang, Zhongting
AU - Su, Mei
AU - Liu, Yao
AU - Han, Hua
AU - Wang, Hui
AU - Li, Xin
PY - 2018/4/10
Y1 - 2018/4/10
N2 - Islanding detection is one of critical technologies for the stable and reliable operation of distributed photovoltaic grid generation system. However, the traditional active island detection method is difficult to balance the accuracy of detection and power quality. The influence of load characteristic for islanding detection is analyzed carefully, and an active frequency shift islanding detection technology is proposed based on the load impedance angle for the grid on/off inverter. The disturbance of the injected current is changed according to the load impedance angle, which improves the detection efficiency for single inverter and multi-inverters, and eliminates the non-detection zones. Besides, a segmented improvement method of the proposed detection is adopted to mitigate the grid current distortion caused by the nonlinear factor in practical application, which improves the power quality of the system. Finally, simulation and experimental results both verify the effectiveness and feasibility of the proposed method.
AB - Islanding detection is one of critical technologies for the stable and reliable operation of distributed photovoltaic grid generation system. However, the traditional active island detection method is difficult to balance the accuracy of detection and power quality. The influence of load characteristic for islanding detection is analyzed carefully, and an active frequency shift islanding detection technology is proposed based on the load impedance angle for the grid on/off inverter. The disturbance of the injected current is changed according to the load impedance angle, which improves the detection efficiency for single inverter and multi-inverters, and eliminates the non-detection zones. Besides, a segmented improvement method of the proposed detection is adopted to mitigate the grid current distortion caused by the nonlinear factor in practical application, which improves the power quality of the system. Finally, simulation and experimental results both verify the effectiveness and feasibility of the proposed method.
KW - Active frequency drift
KW - Islanding detection
KW - Load impedance angle
KW - Multi-inverter
KW - Nonlinear factor
UR - http://www.scopus.com/inward/record.url?scp=85047298538&partnerID=8YFLogxK
U2 - 10.7500/AEPS20170917005
DO - 10.7500/AEPS20170917005
M3 - Journal article
AN - SCOPUS:85047298538
SN - 1000-1026
VL - 42
SP - 199
EP - 207
JO - Dianli Xitong Zidonghua/Automation of Electric Power Systems
JF - Dianli Xitong Zidonghua/Automation of Electric Power Systems
IS - 7
ER -