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The nodal image
Characterization of structures and operating conditions by nodal images
11 other sections not shown
abscissa axis active and reactive active current admittances angle aspect boundary nodes busbars central node chapter characteristics characterize co-linear coefficients considered constant corresponding deduced denoted dependent variable deterioration determine diagram dQ/dU effect electric networks equi established evolution external network fault fictitious node figurative concepts final equivalent geometry homothety impedance indicators initial network interconnection lines introduced linear branch load nodes load short-circuit current loss formula machines magnitudes matrix equation method network extended nodal analysis nodal image node currents node under consideration node voltage non-linear branches obtain operating conditions power plants power systems reactive power real network reduced model reduced scheme reference REI graph REI models REI nets representation rotors shown in Figure simple simplified single single-load equivalent single-load node static stability sub-networks supplied synchronous condenser tion total power transformation transient reactances transient stability values variant forms variation laws vector chain visualization voltage regulation