VOLTAGE SAG COMPENSATION USING ENERGY STORAGE BASED SFCL IN A POWER DISTRIBUTION NETWORK

Abstract

Photovoltaic systems have been increasingly used in the generation of electrical energy because of the cost of energy produced from fossil fuels is rising day to-day and there by photovoltaic energy becomes a promising alternative source for fossil fuels applications to grid connected systems. Continues growth of electrical energy demand is resulting in a corresponding increase in the short circuit in power system, which results in voltage sag problems and threat to power quality in the system. Several solutions have been implemented, including the use of Superconducting Fault Current Limiter (SFCL), in order to reduce circuit breakers rated capacity and to limit the electromagnetic stress in associated equipment. In this paper, the performance of enhanced system capacity with existing switchgear by superconducting fault current limiter is studied. At first, a resistive type SFCL is modelled in Simulink. A three phase system with a nominal capacity is designed and then it is replaced by higher capacity keeping switchgear unchanged. Finally, the SFCL is introduced in the higher capacity system. Thus, it is revealed that the outstanding current limiting performance of SFCL can be used to limit the fault to the level of the existing switchgear if the system capacity is improved. In order to evaluate the impact of fault current limiter in power system performance, simulation models of power system performance with the help of Matlab/Simulink tool.