Increasing the Efficiency of Power Electronics Application at Transformer Substations

The article studies a voltage stabilizer with a high-frequency link for 10/0. 4 kV transformer substations consisting of power electronics elements. The stabilizer generates an additional voltage of the substation and, in the event of deviations, produces either a volt-reduction or a volt-supply, thereby stabilizing the voltage on the load. The value of the additional voltage can be regulated by a transistor rectifier or a voltage inverter. High-frequency intermediate voltage conversion is performed at a frequency of 450 Hz. In the course of the research, mathematical dependences were obtained for the proposed voltage stabilizer. A study of the operation of the voltage stabilizer on a simulation model in the MATLAB/Simulink program was also performed. when connected to a substation power transformer. A distinctive feature of the proposed technical solution is that the harmonic distortion introduced into the load voltage curve does not exceed the maximum permissible values established by national standards.