At Novosibirsk State Technical University (NETI) has developed an algorithm that helps protect synchronous generators from turn faults in the stator winding. The project was among the winners of the Student Startup competition of the Innovation Promotion Foundation.
Viktor Kirichenko, a graduate student of the Department of Power Plants of the Faculty of Energy of NSTU-NETI, proposed to protect synchronous generators with unsplit winding — AC electrical machines that are used in power plants, from stator winding turn faults using a special algorithm, the program code of which is integrated into a microprocessor terminal. Turn faults in the stator winding lead to the problem of possible damage to the insulation, overheating of the winding and eventually the generator failure.
"The developed method will effectively protect up to 20 generators at the same time and ensure a high level of sensitivity of relay protection. This method is unique for low-power synchronous generators with an unsplit winding, "said Viktor Kirichenko, adding that the development has no domestic and foreign analogues for this type of generators.
The algorithm is based on a detailed mathematical model of a synchronous generator. The algorithm detects deviations characteristic of the initial stage of the turn closure. "The model is based on the numerical solution of the differential equilibrium equations of electromotive forces and voltage drops in the windings. Its uniqueness is that it allows you to take into account the different parameters of the phase windings. In other models, as a rule, they assume that the design of the machine provides complete symmetry of the phase windings of the stator, "said Gleb Glazyrin, Candidate of Technical Sciences, associate professor of the Department of Power Stations of the Faculty of Energy, NSTU-NETI,.
According to Viktor Kirichenko, the algorithm has already been tested at the training power plant of NSTU-NETI. The company plans to bring the product to the market and introduce it at power plants in the Novosibirsk region and in large technology companies with their own generating capacities.
Another winner of the Student Startup competition was a project to create a machine for recycling bottles into plastic thread. The initiative will solve the problem of recycling environmentally hazardous plastic and provide educational institutions with expensive material for 3D printing.