DocumentCode :
2636962
Title :
Star connection of grid connected single phase VSIs to supply unbalanced or nonlinear loads under normal and fault condition considering the transmission line impedances
Author :
Hussain, E.K. ; Stone, D.
Author_Institution :
Univ. of Sheffield, Sheffield, UK
fYear :
2012
fDate :
27-29 March 2012
Firstpage :
1
Lastpage :
6
Abstract :
This paper presents a proposed circuit topology and control system to supply both linear and nonlinear loads under unbalanced conditions of the grid voltage and fault conditions by using three, single phase, star connected VSIs and a proposed load current controller. The main contribution is the capability of the proposed controller to supply unbalanced and nonlinear loads and reduce the grid voltages and currents ripple using simple PI controller. Moreover, the proposed topology of connection of three singlephase inverters gains the advantage of parallel connection of VSIs.
Keywords :
PI control; electric current control; electric impedance; fault diagnosis; invertors; load flow control; power grids; power system interconnection; power transmission faults; power transmission lines; PI controller; circuit topology; fault condition; grid connected single phase VSI; linear load supply; load current controller; nonlinear load supply; star connection; transmission line impedance; unbalanced load supply; voltage source inverter; Non linear; Photovoltaic; Unbalanced loads; Voltage source Inverter;
fLanguage :
English
Publisher :
iet
Conference_Titel :
Power Electronics, Machines and Drives (PEMD 2012), 6th IET International Conference on
Conference_Location :
Bristol
Electronic_ISBN :
978-1-84919-616-1
Type :
conf
DOI :
10.1049/cp.2012.0178
Filename :
6242027
Link To Document :
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