Polishchuk A. Methods for improving the accuracy of the balancing the voltages and currents in electrical networks

Object of the research – processes in electric networks with unbalanced loads. Objective of the research is improving the quality of electricity by reducing the unbalance of voltages and currents with the help of balancing installations. Methods of the research – the theory of mathematical modeling – for obtaining mathematical models of control systems for balancing installations; the theory of linear algebra and theoretical electrical engineering – for obtaining analytical expressions of the laws of balancing; simulation modeling possibilities – in computer simulation of processes of ballancing of currents and voltages in Matlab environment; algorithm theory – for constructing algorithms of microprocessor control tools for balancing installations; error theory and mathematical statistics – for analyzing the errors of calculating the parameters of balancing installations. Theoretical results – for the first time formulated the method of balancing voltages with compensating-balancing installations based on the argument expected after the phase voltage equation, as an optimality criterion, which increases the efficiency of control decisions and optimizes the control of compensating and balancing installations; the model of the system of control of capacitor batteries with the effect of minimizing the losses of active power or maintaining the input reactive power at the given level in radial electric networks with unbalanced load, when only transverse balancing installations are used, and under the load balancing, is understood as the complete balancing of currents; a new mathematical model of voltage balancing is proposed, which is based on a new formulation of the problem, which involves the maximum reduction of voltage unbalance only at the expense of reactive power of compensating and balancing installations under the conditions of the integral minimum value of the phase active power of the balancing installation and the value of the voltage argument for phase A close to a similar value for a power source. Practical results – developed algorithms and programs that can be used in the development of control systems for balancing installations that will improve the quality of electricity and improve the reliability of electrical equipment. Based on the results obtained in the work – methods and algorithms obtained, the complex of programs supporting the operation of control devices by balancing installations was improved, which was transferred for experimental exploitation at "Ferumina" Ltd. in Zhytomyr, at "Kvadrotex" Ltd. in Zhytomyr. The results of the work are also implemented in the educational process of Zhytomyr State Technological University. Branch of application – electrical energy industry.