The task of balancing and reactive power compensation in three-phase four-wire power supply system with asymmetric three-phase load is considered. The task is carried out by numerical methods using optimization and mathematical model of power supply system. The proposed efficiency function calculated by the model and based on analysis of symmetrical components of currents in power lines. Optimization parameters are the parameters of the reactive elements

The article is devoted to the study of reactive power compensation modes //in a power supply system powered by a synchronous generator. This power remains in the system even after the application of transverse capacitor compensation, which is unable to provide full compensation of reactive power in the power supply system. Under these conditions, the optimal value of the parameter of the compensating capacitor was found on the computer model by the method of search optimization and the modes in the system with variations of the optimization criteria were investigated. References 16, figures 6.

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The article conciders a description of a system of magnetically coupled inductances using signal graphs. Equivalent transformations of the signal graph allowed to present it in the form when the nodal signals of currents and voltages are expressed through three parameters: inductance of the primary winding and coupling and transformation factors. Mathematical dependencies for the leakage inductance and the relationship between the primary side leakage inductance and the secondary side inductance are obtained. An analysis of these relationships shows that with a decrease in the coupling factor, the fraction of the reduced leakage inductance of the secondary winding increases nonlinearly, and a uniform distribution of the leakage inductance between the primary and secondary sides is possible only for coupling factor, which is close to unity. On the basis of the carried out research, the possibility of neglecting the mutual influence of three-phase transformer windings located on different it's rods. References 9, figures 8.