CALCULATION OF A SHARE OF THE LOAD REGULATING EFFECT IN THE DISTRIBUTION BUSBAR VOLTAGE DEVIATION
Problem Statement (Relevance): The relevance of the research carried out and described in the paper is defined by setting the stricter requirements for the quality of electricity (QE) in recent years. At the same time, load is one of the factors that affect the main quality indicators: deviations of the mains voltage and frequency from their nominal values. Objectives: The research is aimed at assessing the share of the load regulating effect (LRE) in the voltage deviation by the example of the distribution bus of electrical receivers of an industrial facility: a pumping station. Methods Applied: To achieve this goal, the KATRAN software package (automated mode analysis complex) was applied to calculate the parameters of the simulated part of the power supply system of the iron and steel works (PJSC MMK), which has its own electric power sources. Originality: A new approach is proposed to assess the influence of the load regulating effect on the mode parameters and power quality indicators by calculating the share of the load regulating effect in the mains voltage deviation. An algorithm was developed to optimize the mode in view of static load characteristics. It focuses on determining positive or negative load regulating effect and the degree of its influence on the mains voltage deviation, and giving relevant recommendations. Findings: The research described percentage shares of the load regulating effect in the voltage deviation at various lengths of supply cables. The calculation showed that when increasing the distance between electric load and the source of electric power, the influence of the load regulating effect on the mains deviation increased. Practical Relevance: The proposed approach may be used to assess the influence of static load characteristics (SLC) on the main indicators of electric power quality and subsequent recommendations for optimizing the parameters of the electrical system mode by the condition of the minimum mains voltage deviation.