Model for regulating electricity quality indicators in 0.4-10 kV distribution networks
Abstract
Energy consumption is a prerequisite for the existence of mankind. The availability of energy available for consumption has always been necessary to meet human needs, increase the duration and improve the conditions of his/her life. The topic of electricity quality is the main one in Ukraine. Consumers of electrical energy work most efficiently at nominal voltage. However, it is practically impossible to provide nominal voltage to all consumers. Each conductor has a certain resistance, so the passage of electric current through the electrical network is associated with voltage losses. These losses do not remain constant, as the network load constantly changes throughout the day, season, and year. As a result of the load change, the voltage loss in the network also changes, and as a result, the voltage at the consumers' terminals changes. These changes can be quick and short-term (for example, when starting an induction motor with a short-circuited rotor) or slow and long-lasting (with a gradual change in load during a day or a year and with smooth voltage regulation). The paper presents the results of a study of the application of clear control algorithms for the task of normalizing voltage quality and asymmetry coefficients in electrical networks. On the basis of modeling, a new effective model of the algorithm for regulating the quality of electric energy in the distribution network is proposed. The prototype uses a new technical solution for regulating electricity quality indicators. A model of regulation of the quality of electrical energy has been developed based on the method of fuzzy logic and the construction of a block diagram of the algorithm. A structural diagram of the "Relsis RZL-05.RPN" test system has been developed. The results of the research can be used in the design of a device for an on-load tap-changer connected to a transformer
Keywords
energy; voltage deviation; voltage asymmetry; fuzzy logic; automation; regulation under load
References
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