Simulation of Automatic Standby Switching of Transformer Substations

The paper focuses on transformer substations as vital elements of power supply for electricity consumers. The aim of the study is to analyse the operation of automatic standby switching in cases of disrupting transformer substation power utilizing simulation models. To achieve this goal, the authors have conducted an analytical overview of automatic standby switching for transformer substations; have designed a structural scheme of a transformer substation equipped with automatic standby switching; additionally, have developed a methodology for analysing the operation of automatic standby switching for transformer substations. Within the MATLAB/Simulink programming environment, the paper constructs simulation models for a transformer substation with automatic standby switching, a minimum voltage protection unit, an input circuit breaker control unit, and an automatic standby switching device. Truth tables are generated for the minimum voltage protection unit, the input circuit breaker control unit, and the automatic standby switching device. The authors have performed a simulation experiment to model the scenario of disrupting transformer substation power. The experimental outcome yields oscillograms illustrating the activation of the transformer substation automatic standby switching. While simulating the power disruption scenario, it is confirmed that the developed model accurately represents the operation of the transformer substation automatic standby switching and can be utilized in operating power grids and training energy technicians.