Yatsenko D. Dynamic control of distribution networks modes with local energy sources

The introductory part contains general information about the content of the dissertation, the direction of research, their relevance and prospects are substantiated. The goal, object and subject of research are formulated, scientific novelty is defined, as well as information about publications is given, the personal contribution of the recipient is emphasized and the main results obtained are summarized. The first chapter presents the results of a comprehensive analysis of global trends in the development of the energy sector, international experience in managing the modes of operation of distribution electric networks in modern conditions. The considered changes brought to the operation of distribution networks by local energy sources integrated into them. On the basis of the performed analysis, the expediency of using the method of dynamic control of the operating modes of distribution networks with local energy sources is substantiated. Considered features of solving the specified problem in the conditions of Ukraine, taking into account the existing hardware and information support. In this way, the importance of the implementation of dynamic control of PM modes in real time is substantiated, the main steps of solving the specified problem are determined. In the second section, based on the results of the analysis, a method of calculating an indicative indicator was proposed for the express determination of the expediency of changing the network topology in order to minimize energy losses. As a result of mathematical modeling, verification of the use of an indicative indicator to determine the expediency of changing the network topology was carried out. Thus, a universal toolkit has been developed that can be applied to any open circuits of the distribution network. Three options for evaluating the economic effect of the introduction and use of remotely controlled switching devices are proposed, and indicators are selected for evaluating the overall effect of dynamic management of network modes. In the third chapter, a thorough analysis of the methods of forecasting the electrical load and output power of distributed generation sources was carried out and the experience of their use in various conditions was analyzed. Based on this, a new adaptive model for forecasting electric load and generation of active power of local energy sources was developed. In the course of the analysis, a number of forecasting methods were determined, which are included in the adaptive model of forecasting the electrical load and output power of local energy sources. This model makes it possible to minimize the error by automatically applying the optimal forecasting algorithm at each step and thus allows to increase the validity and effectiveness of decisions regarding the implementation of the procedure of dynamic management of the distribution network topology. The adaptive model is implemented in the Python programming language. On the basis of mathematical modeling, the author tested an adaptive forecasting model and obtained an estimate of the forecast error, which can be taken into account when solving the issue of dynamic control of the operating modes of the PM by operationally changing its topology. In the fourth chapter, the results of the practical implementation of the solution to the problem of dynamic management of distribution network operating modes are given. On the basis of calculations using real electrical networks and their mode parameters, it is proved that the new method of dynamic control of switching devices proposed by the author, which by operational analysis of the mode of the existing distribution network, in particular with distributed energy sources, and taking into account the forecast values of the load and output power of local energy sources , allows you to determine the optimal current topology of the network, which really provides an additional reduction in electrical energy losses.