Energization transients of shunt reactors

This paper investigates the impacts of energization transients of large shunt reactors on the operation of HVAC and HVDC/AC power systems. The Electromagnetic Transients Program for DC systems (EMTDC) is used for these simulation studies. The studies conclude that shunt reactor energization can result in undesirable response of power system apparatus and even interruption of power flow, e.g. commutation failure of HVDC power converters. The studies also indicate that the energization transients can be adequately alleviated based on the use of pre-insertion resistor and/or controlled energization strategies.