Abstract
Different types of transient phenomena are found in power systems. Switching transients in power systems have always been a matter of concern in insulation coordination studies. The reactors in power system are widely used elements which purpose is to provide stable power flow in normal conditions and to reduce dynamical and thermal stresses during short circuits and some other faults. Many shunt reactors are switched frequently, even daily. Shunt reactor switching imposes a unique and severe stress on the connected system and the circuit breaker. This paper presents study of overvoltages due to shunt reactor switching in 400 kV substation.
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