Automatic Control of Reactive Power in the Load Node of the Power Supply System Based on Fuzzy Logic

Abstract

AbstractOne of the directions of energy saving at an industrial enterprise is to increase the efficiency of electricity distribution in its power supply system. It provides for the solution of a number of technical problems, including the development of an automatic control system that provides rational management of reactive power in the power supply system. In this work, synchronous motors and batteries of static capacitors are used as reactive power regulators in the node of the electrical network of the power supply system. With an increase in the consumption of reactive power by the load, most of it is gradually compensated by static capacitors, and a smaller part is compensated by synchronous motors operating in the over excitation mode. Considering that in real conditions in the load node of the enterprise’s power supply system, the load change is random, this may limit the operation of current regulators and compensating devices. In this paper, we propose the structure of a fuzzy reactive power regulator synthesized by a model based on fuzzy logic. A scheme and a fuzzy algorithm for regulating the reactive power have been developed. When studying the operation of the fuzzy controller for controlling reactive power compensation in the load node of the power supply system based on the Mamdani algorithm, it was found that the fuzzy algorithm better supports the specified value and direction of reactive power at the point where the load is connected to the buses of the electric network.KeywordsPower supply systemsFuzzy logicReactive powerInduction furnace