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Indices for assessing utility distribution system RMS variation performance

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4 Author(s)
D. L. Brooks ; Electrotek Concepts Inc., Knoxville, TN, USA ; R. C. Dugan ; M. Waclawiak ; A. Sundaram

For many years, electricity distribution companies have used sustained interruption indices as indicators of the reliability of service provided on their systems. Today, however, many electricity consumers are adversely affected by more subtle voltage disturbances such as sags and swells. Many utilities are well aware of such service quality concerns and are implementing extensive monitoring systems to detect such disturbances and assess service quality in this regard. This paper presents a subset of work completed which provides utilities with tools to make more complete service quality assessments. Indices developed to reflect system service quality with respect to all RMS variations are presented. Example values for the indices are calculated using data from a national distribution power quality data collection project. Finally, an example application of the indices currently being made by a distribution utility is discussed

Published in:

IEEE Transactions on Power Delivery  (Volume:13 ,  Issue: 1 )