Adaptive equivalenting for calculations of electric power system state

Two algorithms of correction of balanced steady states of electric power systems at local disturbances are suggested. The basis of the suggested approach is the method of automatic construction of a network equivalent, adequate to the place and size of the disturbing effect. The proposed approach allows one to sharply reduce the volume of calculations and requirements to the computer resources. The sphere of application is correction of state, calculations of the higher harmonics under nonsinusoidal states, correction of the state estimations, other tasks.