Reduced transient model of a group of induction motors

Study of Aggregate Models for Squirrel-Cage Induction Motors

“…The inner-cage (subscript 1) is represented by parameters and and the outer-cage (subscript 2) by and . The real values of the motor parameters can be calculated from Table II as (5) where the impedance base is (6) with being the rated line voltage and the rated mechanical power. In order to determine the single-cage model parameters, two different methodologies have been followed.…”

Transient Performance of a Group of Induction Motors With Terminal Capacitors Following Supply Disconnection

“…The electrical differential equations in equation (I) are referred to the stationary d-q axes. Also, the conventional method of representing the electrical differential equations of each motor, in which the inductance matrix has to be inverted [7] throughout the numerical integration, has been avoided, usd and u sq are The total phase currents drawn from the supply are, thus, obtained from Where iCLI ' iCL2 and iCL3 are the currents drawn by the terminal capacitors and are obtained from:…”

“…However, these investigations were concerned with the behavior of a single three-phase machine with terminal capacitors [3,6]. Also investigations on the transient behavior of a group of induction machines following supply connection, disconnection and reconnection had been conducted [2,4,5,7] but without using terminal capacitors for power factor correction.…”

Aggregating Method of Induction Motor Group Using Energy Conservation Law

“…Hence, aggregate models or single-unit models with minimum order of induction motor are needed to represent a group of motors. Along the chronological order, various methods have been proposed for handing with aggregation of induction motor models [4][5][6][7][8][9][10][11][12][13][14][15][16]. Among them, a method in [4] is to replace a group of induction motors by a single equivalent unit whose parameters are identied from the steady-state consideration.…”