Magnetic Shunt for Three Phase Reactors

For three phase shunt reactors to function effectively in EHV power systems the behavior of the circuit reluctance must be known under all operating conditions. Difficulties have occurred in effectively designing electromagnetic circuits with multiple air gaps in shunt reactors. This paper describes design techniques for magnetic shunts which can be applied to three phase shunt reactors resulting in size and weight reduction. Performance characteristics of shunt reactors under imbalanced system conditions are presented and magnetic shunt performance for a 345 kV, 100 MVAR three phase shunt reactor is given.