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Conference Record of the 2006 IEEE IAS Pulp and Paper Conference

APPLICATION OF IEEE STD 519-1992 HARMONIC LIMITS
Thomas M. Blooming, P.E. t.blooming@ieee.org Eaton Electrical Asheville, NorthCarolina Daniel J. Carnovale, P.E. DanielJCarnovale@eaton.com Eaton Electrical Pittsburgh, Pennsylvania

Abstract: IEEE Std 519-1992 is a useful document for understanding harmonics and applyingharmonic limits in power systems. Despite many years of good use there is still some confusion about how to apply certain aspects of the standard. This paper discusses some of those, as well as relatedissues that are helpful in working with harmonic limits. There is considerable debate as to precisely how some elements of IEEE Std 519-1992 should be interpreted. This paper presents the authors’ viewson some of the more ambiguous elements of the standard and on the application of harmonic limits in general. Key Words: Harmonics, harmonic limits, IEEE Std 519-1992, point of common coupling (PCC),total demand distortion (TDD). I. Introduction Harmonics are a concern because they can cause excessive heating and pulsating and reduced torque in motors and generators; increased heating and voltagestress in capacitors; and misoperation in electronics, switchgear and relaying. In short, harmonics can lead to reduced equipment life if a system is designed without consideration for harmonics andif equipment is not properly rated and applied. It is therefore useful to measure and limit harmonics in electric power systems. IEEE Std 519-1992, IEEE Recommended Practices and Requirements forHarmonic Control in Electric Power Systems (IEEE 519) [1], provides a basis for limiting harmonics. This document does an excellent job of defining the limits but there are some application issues thatrequire the reader to use his or her judgment. One very basic distinction when discussing harmonics is whether the harmonics in question are voltage harmonics or current harmonics. It is the authors’...