Title :
LVRT-retardation-device for decentralized power plants
Author :
Essl, Norbert ; Renner, Herwig
Author_Institution :
Dept. of Electr. Power Syst., Graz Univ. of Technol., Graz, Austria
Abstract :
During fault events in the electrical power grid nearby a synchronous generator, the rotor speed of the machine is increased, because dissipated power is below generated power. This may cause high rotor angle excursions and hence the machine to lose synchronism with the power grid. This paper presents a retardation device, which is able to curtail the acceleration of rotor speed during fault events. Besides, the backswing phenomenon, which decelerates the rotor speed in the first few milliseconds of the fault event. Different simulation methods are addressed within the scope of work. All simulations were performed with the power system analysis software DIgSILENT PowerFactory.
Keywords :
distributed power generation; power grids; rotors; synchronous generators; DIgSILENT PowerFactory; LVRT-retardation-device; backswing phenomenon; decentralized power plants; electrical power grid; fault events; low voltage ride through; machine rotor speed; power system analysis software; rotor angle excursions; synchronous generator; Circuit faults; Generators; Integrated circuit modeling; Resistance; Resistors; Rotors; Torque; backswing; distributed generation; dynamic simulation; grid codes; low voltage ride through; retardation device;
Conference_Titel :
Electric Power Quality and Supply Reliability Conference (PQ), 2014
Conference_Location :
Rakvere
Print_ISBN :
978-1-4799-5020-1
DOI :
10.1109/PQ.2014.6866779
