Double feed inductor generator mathematical model for studying generation modes with unbalance of electrical machine parameters

Abstract

The analysis of systems using dual power generators revealed a variety of models, most of which are built in the α-β and d-q coordinate systems. Models and control systems are made taking into account the unbalance of the voltage of the electrical network. A model of a three-phase dual-supply generator with the possibility of introducing asymmetry of the electrical parameters of the stator and rotor has been synthesized. Modes with symmetric and asymmetric parameters of the machine windings were modeled. Unbalance is implemented by changing the inductance and resistance of one of the stators and/or rotor phases. In both cases, the required generation mode was obtained both in terms of voltage frequency and its effective value. In the case of unbalance parameters of the windings, asymmetry of the generated voltage and the occurrence of pulsations of the electromagnetic moment with a frequency of 100 Hz were noted. Using the approach to the analysis of the electric power caused by the voltage and current of positive, negative and zero sequences, according to the simulation results, it was noted that in the case of asymmetry, along with the appearance of the components of the negative sequence power, changes in the components of the positive sequence power occur. The indicated power components increase with increasing asymmetry of machine parameters