NORMALIZATION OF THE VOLTAGE UNSINUSOIDALITY IN DISTRIBUTION NETWORKS

Abstract

The electric power industry has always been one of the main industries of the Irkutsk region. The availability of hydropower and, as a result, cheap energy resources have led to the development of industrial enterprises, energy transmission and energy-consuming industries. In the presence of a large amount of energy resources in many settlements of the Irkutsk region, problems arise with the quality of the supplied electric energy, there is no stable power supply. Distribution networks, as the lowest voltage level, are the most vulnerable from external influences on the energy system as a whole. A high level of unsinusoidality and asymmetry negatively affect the operation of electrical devices, operating modes of technological lines and systems. The main problem is obtaining up-to-date information about the parameters of the electrical network for calculating the loss of electricity. (Research purpose) The research purpose is in inevaluating the effect of voltage unsinusoidality on power losses and reliability of electrical equipment in distribution networks. (Materials and methods) The article presents the main ways to obtain data on the parameters of the electrical network: measurement using measuring and computing devices (experimental studies); modeling of electrical network parameters; theoretical studies. (Results and discussion) The results of measuring the unsinusoidal voltage in the distribution networks of an agricultural enterprise were given. In the article there are presented and compared ways to find reliable information about the parameters of the electrical network. A simulation of an electrical network with a load and an active filter was carried out. The article presents the calculations of the reliability indicators of electrical equipment at an agricultural enterprise. (Conclusions) In order to determine the level of unsinusoidal voltage of distribution networks, it is necessary to obtain reliable information. In distribution networks, in order to obtain reliable data on load conditions, it is advisable to use the method of calculating minimum and maximum loads, which allows taking into account the entire cycle of load changes over time and reducing time and technical resources in comparison with other methods.