Developing a Methodology for Determining the Culprit in the Deterioration of Power Quality Indicators

The authors of the article propose a method for determining the culprit in the deterioration of the quality of electricity at the point of common connection using the example of voltage unbalance. The issues of ensuring the quality of electrical energy in power supply systems are of great importance. They determine the reliability and efficiency of power supply to consumers. It emphasizes the relevance of this article. The aim of the study is to develop a methodology for determining the culprit in the deterioration of the quality indicators of electricity at the point of common coupling (PCC). To achieve this goal, the authors propose to use a deterministic method for calculating the permissible impact of the consumer on the quality of electricity in the PCC, based on the results of seven-day measurements of the mode parameters at operating facilities. The authors suggest assessing the quality of electricity by comparing the current value of the total vector of distortions and the established norms for the quality of electricity in the PCC. Based on the proposed calculation method, they developed an algorithm for determining the culprit in the deterioration of the quality of electricity in the PCC according to voltage unbalance. The results obtained can be used at the design stage and under operating conditions to predict the actual contribution of consumers and the actual contribution of the system after connecting a new electric power industry entity to the PCC.