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Harmonic and Interharmonic Measurement
According to IEEE 519 and IEC 61000-4-7
E. Gunther, Senior Member, IEEE
The standard defines the instrumentation to be used for
Abstract— IEEE Standard 519 is presently under revision emissions testing for individual pieces of equipment as well as
and is expected to mend that harmonic and interharmonic for the overall measurement of harmonic/interharmonic
measurements be performed according to the method defined in voltages and currents in supply systems.
IEC 61000-4-7 [1]. This summary paper and the associated
presentation describe important aspects of the 61000-4-7
standard in the context of its intended use in the draft IEEE 519
standards. III. DEFINITIONS AND INDICES
The standard defines several fundamental relationships and
Index Terms — Power quality, harmonics, standards. indices (. total harmonic distortion) that are all derived
from the Fourier series using the following specific notations:
I. INTRODUCTION
ower quality standards are developed in IEC by Study
PCommittee SC77A. Working Group 1 (Harmonics and
other low-frequency disturbance) is responsible for harmonic
and interharmonic emission standards that apply to individual
pieces of equipment connected to the work. This
same group is also responsible for defining the method of
measurement which has been standardized