Компенсация реактивной мощности в тяговой системе переменного тока

The alternative current traction substation is considered when primary transformer’s windings are connected in a star and secondary windings connected in delta. Real case, when system is supplied from traction transformer of type TDNG 25000/110 is considered.   A traction load is supplied from one side of delta connection. This creates asymmetrical mode in power supply, decreases power factor and increases copper losses in the system. Simulation of electromagnetic processes on visual model shows a considerable asymmetry in voltages and currents of transformer. Searching optimization  based on Nelder-Mead algorithm is implemented on Simulink all at the same time with visual model of traction substation on SimPowerSystem. As searching optimization result are found parameters of simmetrizating device, which provides balanced voltages and currents on transformer’s windings. Reactive power in system is completely compensated and copper losses in supply system are minimized.