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Electric powers are separated in active powers (the dominant 50 or 60 Hz active power and the tiny harmonic active powers) and nonactive powers (the 50 or 60 Hz reactive power and three more distortion powers). When the measurements are taken over a duration τ and the total monitoring time τ is divided in ν equal intervals (τ = νΔτ ) the overall values of powers are obtained by implementing the “aggregation”...
Present IEC guidelines are difficult to apply to realistic cases because of the data load, the number of assumptions required and the computational complexity. A new approach is given based on the concept of voltage droop, to be detailed in a companion paper. The benefits of the approach are a simple calculation with minimal data and no required assumptions. It applies to radial or meshed distribution...
This paper discusses the power quality survey conducted in the distribution system of Indian Institute of Technology Madras, Chennai, India. Individual power quality parameters measured from the survey are analyzed and presented in detail. To assess the power quality, measured data are compared with various power quality standards including IEEE 519-1992 standard for the measured voltage and current...
Currently several methodologies exist to assess the Responsibilities Assignment Problem in Power Quality. In this paper an experimental setup with two known disturbing electrically and mechanically coupled loads has been used to provide a reference disturbance setup for comparing these methodologies. The results and discussion extracted from this experiment is reported in this paper. The setup offered...
IEEE Std 519-1992 is regarded as one of the most widely used power quality standards for both electric utilities and their customers. Among several difficult aspects of applying IEEE Std 519, two issues are related to modeling and measurement of harmonic currents and voltages produced by nonlinear loads. This paper intends to discuss ambiguous aspects of the modeling and measurement when applying...
Most utilities in the United States use the voltage and harmonic current limits given in IEEE Std. 519 as at least the basis for how they deal with harmonic-producing customers. In this paper, rationale behind making the recommended limits into requirements is discussed so as to offer possible guidance for future decisions regarding limits. With IEEE Std. 519 completing a revision at this time, the...
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