Study of Switching Transient Over Voltage due to Transient Short Circuit Fault in a Power Distribution Network

摘要

This Fault means unsatisfactory, undesirable situation or feature which is a commonly known word in power system network. Over all system's behavior, reliability, system's protection, controlling is very much dependent on fault analysis. When a system is in faulty condition, it states in abnormal situation and lose it's system properties such as continuous power flow to the consumers. Moreover, it's long existence can impairment the system equipment and causes fire whose continuation causes property loss, hence over all economical loss of the power system. To mitigate this circumstance, it necessary to understand the system behavior in the faulty situation and so there needs a term named fault analysis. This paper focused on the transient fault analysis of the distribution side of the power system network to show the transient overvoltage developed during clearing of fault. PSCAD software has been used to simulate the network and understand the behavior of voltage and current during faulty period and voltages developed at different buses during clearing of fault. In PSCAD software, a schematic diagram is built to run the simulation process, analysis the result and depicted the data in a graphical circumstance.