A novel control strategy for power conditioning unit to enhance power quality during FRT

Author(s):Nishij G. Kulkarnia* , Vasudeo B. Virulkarb
a Department of EE, M.B.E.S.College of Engineering, Ambajogai, 431517 India
b Department of EE,Government College of Engineering,Chandrapur, 442403 India
International Journal of Smart Grid and Clean Energy, vol. 7, no. 4, October 2018: pp. 257-264
ISSN: 2315-4462 (Print)
ISSN: 2373-3594 (Online)
Digital Object Identifier: 10.12720/sgce.7.4.257-264

Abstract: This paper proposes a novel control strategy for power conditioning unit (PCU) to enhance power quality during fault ride through (FRT) operation. During unsymmetrical fault condition, PCU injects sinusoidal currents by adopting control method suggested. By using effective current limitation technique suggested here, injected currents can be limited to their rated value during a fault. To avoid triggering of overcurrent protection, FRT operation is ensured. In case of failure of dc-dc unit to handle the maximum PV power, a non-maximum power point tracking (Non-MPPT) operation mode is proposed to get it operated under severe fault condition.

Keywords: DC link voltage control, power conditioning unit, current limitation, fault ride through
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