Kylymchuk A. Compensation of the mutual impact of the nonuniform electric grids using linear regulators

The object of the research - processes of optimal control of non-uniform electric networks normal modes. The aim of the study - reduction of additional losses of energy, caused by non-uniformity of main and distributive electric networks, by means of compensation of their modes interference, using linear regulators, installed in the networks of lower voltage. Methods of the research - steady-state modes of electric networks are modeled and analyzed on the base of contour currents methods and node voltages applying Newton methods; for the analysis of non-uniformity of electric networks and formation of optical control laws matrix algebra, theory of graphs, decomposition and object - oriented analysis were used; mathematical models, connecting the parameters of non-uniform electric networks modes and parameters of regulating devices are formed, using similarity theory. Theoretical results - for the first time the dependence of power losses, caused by mutual and transit energy transfer between main electric networks and distributive electric networks on the change of transformation factor of cross-transformer, located in distributive electric network that can be used for the reduction of additional losses of power and electric energy, produced by transit transfers of energy; for the first time the method of determination of optimal place of cross-transformer connection in distributive electric network, based on compensation of non-uniformity of parallely operating electric networks that enables to increase the control efficiency of power fluxes of main electric networks in the branches of distributive electric networks was proposed; method of determination of optimal values of reactive components of transformation ratios of transformer couplings in distributive electric networks, taking into account phase-shift angle of cross-transformers that enables to use these ratios in optimal control of power fluxes for reducing losses of power and electric energy in distributive network or, depending on the tasks set, in main and distributive electric networks, was improved. Practical results - on the base of the research carried out, an important problem, dealing with the reduction of additional losses of energy is solved; that is resulted in the development of the facilities for analysis and optimization of operation modes of 110 kV electric networks of energy supply companies and improvement of the algorithms of optimal control of these networks normal modes. Level of implementation - the results of the research are implemented at Public Utility Company' Vinnytsiaoblenergo", South-West Electric Energy System and are used in education process At Vinnytsia National Technical University. Sphere (branch) of application electrical power engineering.