Grytsiuk I. Optimal control by means of reactive power compensation in distribution grids with distributed sources of energy

Object of study - normal modes of distribution power networks with distributed sources of electricity; aim is to develop methods and tools of optimal control of reactive power compensation in distribution grids with the influence of distributed sources of energy to reduce its additional losses caused by reactive overflows. The thesis applied generalized theory of modeling techniques, methods of linear and nonlinear programming methods nodal voltages and secondary load (for the analysis of steady-state power modes), differential coefficient method and distribution losses (to simulate the distribution of energy losses between different transactions rektyvnoyi power), the theory fuzzy sets and the method of "center of gravity" (to identify the shape factor graphs), matrix algebra, graph theory and decomposition (for the development of algorithms for the analysis of reactive power flows in distribution grids with distributed sources of energy and the formation of optimal control laws compensating installations). Theoretical results - the first time a method for determining the component power losses of reactive power flows in distribution networks with distributed sources of energy, which, in contrast to the known into account peculiarities of jet flows and the distribution network voltage, thus enhancing the adequacy evaluation criteria of optimality in optimization problems levels of reactive power compensation and management compensating installations, was further developed method for calculating the optimum levels of reactive power compensation of consumers of electrical networks with distributed sources of energy that manifests itself in taking into account its impact on the structure of losses in the electrical and allows you to adjust the economically justified level of compensation ensuring the accuracy of calculations at the design stage; improved method of adaptive adjustment optimization problem of reactive power compensation in distribution grids by identifying appropriate settings of the automatic control institutions kami centralized and group compensation of reactive loads, resulting in consideration of instability modes of consumption, and functioning of distributed sources energy, and improves the efficiency of control actions to optimize the reactive power flows and voltage distribution grids. Practical results - part developed algorithms for determining energy losses of reactive power flows in distribution networks with distributed sources of energy developed algorithms calculating optimal levels of reactive power compensation of consumers of electric networks of dispersed power sources based on their impact on the structure of energy losses; developed algorithms for determining the appropriate settings of the automatic control installations centralized, group and individual compensation of reactive loads, taking into account the stochastic nature of the operation of distributed power sources. The degree of implementation - the results introduced in PJSC "Volynoblenergo" (Act of 28.11.2011 town) and in the educational process Lutsk National Technical University. Field (field use) - electricity.