About the construction of equivalent circuits for electric power systems with a controlled error because of the simplification

摘要

An explanation is given for an important property of large electric power systems - the decay of responses to local disturbances by measure of moving furthem away from the place of its application. Its relation with the special features of the Jacobi's matrix of the linearized system of equations is established. A formal procedure is described enabling one to use these special features for assessment of the errors because of the simplification of equivalent circuits in calculating steady-state operating conditions including the limiting ones connected with the degeneration of Jacobi's matrix. The software package developed enables one to increase considerably the validity of solving the problems arising when planning operating conditions for electric power systems.