Source: http://standards.ieee.org/news/2011/harmonic.html
IEEE TO DEVELOP STANDARDS LIMITING INSERTION OF HARMONICS INTO POWER GRID
Standard for calibration and use of RF test gear to be revised
PISCATAWAY, N.J., USA, 25 April 2011 –
IEEE, the world's largest professional association advancing technology
for humanity, today announced that the IEEE Standards Association
(IEEE-SA) Standards Board approved two new projects to develop standards
that will limit the injection of harmonic frequencies into the public
electric transmission system.
Harmonic pollution is a growing problem caused by the
widespread use of power supplies and other non-linear loads. It can
result in power loss and equipment damage and it may also be related to
environmental safety issues.
Both standards will address harmonic injection in 60Hz
and 120V/240V systems such as those in use in the United States, Canada
and other regions of the world. Both standards will also use the IEC
SC77A and IEC 61000-3-12 standards as seed documents.
Proposed standard IEEE P1836™ – Standard for
Electromagnetic Compatibility (EMC) - Limits for Harmonic Current
Emissions Produced by Equipment Connected to Public Low-Voltage Systems
with Input Current <= 16 A Per Phase – will establish limits for
equipment and create methodologies for testing and simulation.
Proposed standard IEEE P1837™ – Standard for
Electromagnetic Compatibility (EMC) - Limits for Harmonic Current
Emissions Produced by Equipment Connected to Public Low-Voltage Systems
with Input Current >16 and <= 75 A Per Phase – has the same
general thrust. Both standards will take the cost of corrective action
into consideration and apply the principals of lowest cost solutions.
In addition, the IEEE has initiated a project to revise
the standard covering procedures and equipment used to measure
electromagnetic emissions. The present standard, IEEE P1309™ –
Standard for Calibration of Electromagnetic Field Sensors and Probes,
Excluding Antennas, from 9 kHz to 40 GHz – will be revised because it
has been learned that in some situations RF probes may return values
that are significantly different from the calibrated response. This
project will provide instructions on probe use, characteristics and
related measurement uncertainties. Use factors that may affect the
accuracy of the reading will also be reviewed.
About the IEEE Standards Association
The IEEE Standards Association, a globally recognized standards-setting
body within IEEE, develops consensus standards through an open process
that engages industry and brings together a broad stakeholder community.
IEEE standards set specifications and best practices based on current
scientific and technological knowledge. The IEEE-SA has a portfolio of
over 900 active standards and more than 500 standards under development.
For more information see the IEEE-SA website.
