Solid State Circuit Breaker for Medium Voltage Feeder Protection

With the growing of demand of electrical power, the distribution system is increasing ceaselessly. This ends up in the high level of short-circuit currents. Therefore, the electrical cost like devices, installation, operation and maintenance will increase step by step. Moreover, the high level of short current becomes the intense downside. It’s going to injury the electrical devices or impact on operation. Continuity of power offer systems is extremely low as a result of operations of protecting devices underneath faulted conditions. Mechanical circuit breakers in power distribution systems provides a safe handling of short-circuits underneath restricted short-circuit power of the grid. Victimization delayed turn-off times; the circuit breakers will be coordinated with another protecting instrumentation. Hence, a high availableness of the grid will be expected. However, once the short event happens in an exceedingly medium-voltage distribution feeder, voltages on the path area unit suddenly sagged. Sensitive hundreds like computers or electronic-control instrumentation can fail even though the voltage returns among a number of seconds. A solid-state fuse is in a position to modify at terribly high speed as quick as voltage or current sensing devices will response to the faulty signal. This methodology proposes detail of formulating solid-state breakers (SSB) in electrical power distribution systems by victimization GUI-based surroundings of MATLAB/SIMULINK. Utilization of MATLAB computer code simplifies downside resolution complexness and conjointly reduces operating time. During this methodology, a 22-kV power distribution feeder with a load having the SSB for defense is placed. A thyristor-based fuse is shapely. Detail of the facility circuit and its firing management half is incontestable in graphical diagrams victimization parts of the MATLAB’s power System Blockset (PSB). Take a look at against a fault condition to verify its use is meted out. The results show that, with a moderate sensing technique to observe voltage and current of the protected feeder, the SSB will interrupt fault outright.