This paper proposes a statistical approach to analyze the quality of voltage levels in electric Power distribution systems, based on the principles established by ANEEL Resolution 505/2001, under which all utility power distribution of the country are subjected. The paper presents considerations on quality in electricity distribution, existing procedures for quality control of voltage levels and suggests the possibility of using statistical process control concepts and levels of ability and performance as evidence of alternative information and prediction. A case study in two circuits of low voltage distribution systems is analyzed comparatively, using primarily the procedures and criteria established by ANEEL, and then the approach proposed by the authors. The article concludes by analyzing the potential contributions of the statistical procedures proposed.
Electric energy distribution; Tension level control; Quality; Statistical process control; Autocorrelation
