A Novel Islanding Detection Method Using dq Harmonic Impedance Component

2018 International Conference on Construction, Aviation and Environmental Engineering

生态环境科学;生物科学

Gao, Shuping^1 ; Wang, Kaichang^1 ; Yun, Baoji^2

College of Electrical and Control Engineering, Xi'An University of Science and Technology, Xi'an, Shaanxi Province

710054, China^1

Xi'An Xirui Engineering Technology Limited Company, Xi'An Shaanxi Province, 710018, China^2

关键词: Blind detection;    Characteristic frequencies;    Harmonic impedances;    Islanding;    Islanding detection methods;    Passive detection;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/233/4/042039/pdf
DOI  :  10.1088/1755-1315/233/4/042039

来源: IOP

【 摘 要 】

By analyzing the harmonic impedance of the inverter, it is found that the characteristic frequency impedance signal is different when it is connected to grid or when it is disconnected to grid. According to this difference, a new detecting islanding method is proposed, which is implemented by using the difference of dq harmonic impedance component at the PCC point when it is connected to grid or when it is disconnected to grid. Simulation results show that islanding state can be detected quickly and effectively with this method. And compared with the traditional passive detection method, the method proposed can achieve non-blind detection and has no influence on power quality.