DocumentCode :
2603935
Title :
A two-stage PV grid-connected inverter with optimized anti-islanding protection method
Author :
Xiang, Haitao ; Yan, Yangguang ; Jiang, Haijiang
Author_Institution :
Coll. of Autom. Eng., Nanjing Univ. of Aeronaut. & Astronaut., Nanjing, China
fYear :
2009
fDate :
6-7 April 2009
Firstpage :
1
Lastpage :
4
Abstract :
Anti-islanding protection of power disturbing method for a two-stage photovoltaic grid-connected inverter is designed in this paper. There is little coupling between the input and output power of the inverter as the dc-dc and dc-ac conversion is independent from each other. Step change of voltage across the dc-link filtering capacitor results in a change of stored energy of the capacitor and consequent a disturbance on the current injected into the grid. This algorithm is adopted for the islanding detection of the inverter. When the grid is gone, the disturbing current results in disturbance of the voltage across the ac terminals, and the islanding protection can be triggered. This method has merit of little non-detection zone for islanding detection.
Keywords :
DC-AC power convertors; DC-DC power convertors; distributed power generation; invertors; power capacitors; dc-ac conversion; dc-dc conversion; dc-link filtering capacitor; inverter; islanding detection; islanding protection; optimized anti-islanding protection method; power disturbing method; two-stage photovoltaic grid-connected inverter; Capacitors; Change detection algorithms; Filtering; Inverters; Optimization methods; Photovoltaic systems; Power generation; Protection; Solar power generation; Voltage; Grid-Connected Inverter; Islanding Detection; Photovoltaic; Power disturbing; Two-Stage;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Sustainable Power Generation and Supply, 2009. SUPERGEN '09. International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-4934-7
Type :
conf
DOI :
10.1109/SUPERGEN.2009.5348245
Filename :
5348245
Link To Document :
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