Switching Transient Mitigation By Controlled Switching: A Literature Survey

Energy is one of the major inputs for the economic development of any country. This is the reason electrical power system network is expanding day by day to serve the increasing energy demand of the nation. There are many types of equipments in power system.A circuit breaker is protective switching equipment and hence, it plays a very important role in the power system. To maintain the adequate reactive power for voltage control in EHV & UHV system, frequent switching of capacitors and reactors is required through circuit breaker.These are the few applications where switching transients can occur frequently.Apart from this unloaded transformer and transmission line energization also leads to inrush current and over voltages in the system. This condition results into electrical and mechanical stresses and sometimes may lead to equipment failure. Controlled switching has become an economical and technically viable solution to reduce switching transients. This paper presents a literature survey based on switching transients and controlled switching aspects.IEEE transactions,conferences, CIGRE reports and various catalogues of the controllers are referred for the literature survey. This survey is helpful for the researchers working in the area of controlled switching, circuit breaker manufacturers,controller manufactures and power utilities.