Tsigan P. Energy efficiency of distribution networks modes of photovoltaic plants

The dissertation solved an important scientific problem, which consists the increasemment of the energy efficiency of the photovoltaic plants modes by establishing the regularities of the higher current harmonics influence caused by the non-stationary modes of network inverters, operation taking into account the specific nature of the generation schedules, on the operation modes and the efficiency of the equipment selection of the distribution network, which allows to ensure rational parameters of the electrotechnical complex, reduction of electricity losses and electromagnetic damage. The need to ensure the electromagnetic compatibility of decentralized energy sources, which include photovoltaic stations, is caused by the presence of electric energy parameters converters in their structure. That means network inverters, which during operation create electromagnetic disturbances in the form of higher harmonic components of the current. Their change patterns and ways of reduction represent significant scientific and practical interest. The existing methodological approaches to the selection of equipment for distribution networks of photovoltaic plants, in particular, power transformers, require improvement in order to increase their accuracy, and in the future - to ensure the energy efficiency of the main equipment operating modes. This is achieved by taking into account the regularities of the electromagnetic disturbances influence and the characteristics of real generation schedules on the operation modes parameters of the distribution networks equipment of the photovoltaic stations