Pacific Power Source, Inc. Publishes White Paper
on
Line Injected Harmonics
Available Free from Pacific Power Source's Website
IRVINE, CA, August 18, 2009 -
Pacific Power Source,
Inc., a leading manufacturer of high-performance
AC Power Sources and
Power Conversion Equipment has published an informative
white paper titled "Line to Line Voltage Considerations with
Line Injected Harmonics." The note, which clarifies why various
harmonics injected on individual phases of a waveform may
produce unexpected results when observed Line to Line rather
than Line to Neutral, is available for free download from the
company's website at:
http://www.pacificpower.com/infocenter/white_papers.html
The white paper describes how engineers can use Pacific
Power's AMX Series power source to synthesize waveforms for
applications such as simulating AC power line harmonics and
other power perturbations. It outlines how engineers can use the
company's UPC 32 Programmable Controller with the Harmonic
Analysis and Synthesis (HAS) option, which permits specifying
the waveform and amplitude of each phase of a signal
independently and creating harmonics through the 50th order. It
also illustrates how the company's UPC Software is used to
create custom waveforms of varying harmonic content and phase
angles. These synthesized waveforms can then be downloaded to
the AMX power source for execution. The white paper is
extensively illustrated with waveform captures that demonstrate
the differences in power line signals that become apparent when
observing results as line to neutral rather than as line to
line.
The white paper explains why the calculation of line to line
results, either in harmonic or transient conditions, may not be
intuitive. In any three-phase application, a disturbance placed
on a single vector will always affect both adjacent phase to
phase vectors. Careful planning and a thorough understanding of
vector addition and line interaction are necessary to fully
appreciate the power of Pacific Power's arbitrary waveform
capabilities.
These capabilities allow creating line to line results where
the integer harmonics can be forced to add to the peak of the
waveform. Pacific Power's HAS option also offers the ability to
specify the starting phase angle of the harmonic in addition to
the harmonic order and percent harmonic. By using three
different waveforms that have the same harmonic content but
which are offset by the normal 120 degree phase angle, the zero
crossing of the harmonic order is moved off the 120 degree point
of the fundamental.
About Pacific Power Source
Pacific Power Source, Inc., founded in 1973, is a world leader
in high-performance AC Power Sources and Power Conversion
Equipment. The company designs and manufactures its products at
its headquarters and main facility in Irvine, California, and
maintains sales and service centers in China (Shanghai), the
United Kingdom (Gilford), and France (Strasbourg). In addition,
PPS has a worldwide network of sales representatives and
distributors.
Pacific Power Source offers standard products that range in
power from 500VA to 625kVA and above. Low-power products include
line conditioners, frequency converters and programmable AC
power sources. High-power systems include power line
conditioners, frequency converters, programmable AC power test
equipment, and uninterruptible AC power sources.
Major markets served by Pacific Power Source include
Commercial/Industrial and Military, with applications ranging
from Research and Development and Manufacturing to Facility
Power. Key market segments include Aerospace, Appliances
("Whiteware"), Communications, Computers, Government
Laboratories, Lighting, and Test and Measurement
Instrumentation. The company's customers include a broad array
of domestic, military, and multinational firms with operations
throughout the world.
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