Performance Analysis of a Modified Bridge Current Limiter in Mitigating Asymmetrical and Symmetrical Faults in Power Systems

this paper provides a detailed performance analysis of a Modified Bridge Current Limiter (MBCL) designed to mitigate both asymmetrical and symmetrical faults in power systems. The work concentrates on the penetration of Inverter-Based Distributed Generators (IBDG) like solar photovoltaic and wind turbines and the issues surrounding fault management within increased fault currents and low source impedance. The first category is the traditional kind which includes circuit breakers and current limiting reactors both of which are quite ineffective at dealing with the high fault currents in their initial few microseconds. Fault current limiting performance in IBDG systems is intended to be improved by the recently proposed MBCL, a non-superconducting fault current limiter. An Insulated-Gate Bipolar Transistor (IGBT) switch is used in its control scheme to permit dynamic operation and facilitate quick fault current clearing. The MBCL successfully reduces fault currents under 2-line-to-ground and 3-line-to-ground fault circumstances, according to extensive MATLAB/Simulink simulations. According to the results, the MBCL improves the fault ride-through capability of IBDG systems by lowering peak currents and preserving voltage stability better than conventional techniques like Series Dynamic Braking Resistors (SDBR).