DocumentCode :
1777142
Title :
Active islanding detection method based on grid-connected photovoltaic inverter and negative sequence current injection
Author :
Zhihui Dai ; Zhiqiang Chong ; Xuan Liu ; Chuan Li
Author_Institution :
North China Electr. Power Univ., Baoding, China
fYear :
2014
fDate :
20-22 Oct. 2014
Firstpage :
1685
Lastpage :
1690
Abstract :
The photovoltaic power source would keep supplying power under unscheduled islanding operation, and hence bring potential risk for maintenance personnel and user equipments, so it is of great significance to enforce accurate and rapid islanding detection method. A method based on negative sequence current injection and voltage imbalance at the point of common coupling is proposed. The reasonable switching strategy of negative sequence current in the grid-connected inverter reduces the impact of injected current on the main power grid. The method, without non-detection zone, is also unaffected by asymmetric faults of the power grid. Case study shows that the method could detect islanding state accurately and quickly under the worst condition while the power of the PV matches the load power, and the voltage and the frequency of the PCC has small shift.
Keywords :
distributed power generation; invertors; photovoltaic power systems; power grids; power system interconnection; active islanding detection; grid-connected inverter; grid-connected photovoltaic inverter; maintenance personnel; negative sequence current injection; photovoltaic power source; user equipments; Circuit faults; Harmonic analysis; Inverters; Islanding; Power grids; Power harmonic filters; Total Harmonic Distortion; islanding detection; negative sequence current; non-detection zone; voltage imbalance;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Power System Technology (POWERCON), 2014 International Conference on
Conference_Location :
Chengdu
Type :
conf
DOI :
10.1109/POWERCON.2014.6993483
Filename :
6993483
Link To Document :
بازگشت