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The quality of electrical power is of increasing concern globally due to the tremendous proliferation of non linear electronic loads in the home, in commercial establishments, throughout industry and in the marine environment (i.e. on ships and offshore installations). Events such as sags and swells are transient in nature and therefore of very short duration whereas harmonics produced by non linear loads are continuous and seriously degrade voltage supplies up to the highest levels. In addition, harmonics adversely affect the reliability and performance of all types items of electrical plant and equipment.
In order to limit the magnitude of harmonics in electricity supply networks numerous countries implement harmonic recommendations. In North America, and to a major degree, internationally,
IEEE 519 (1992) is the recognised ‘standard’. In the United Kingdom the new Engineering Recommendation G5/4 (2001) came into force in February 2001 for equipment connected to the
public electricity supply network (i.e. not connected to discrete generators).
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Many other countries have their own harmonic recommendations or use US or UK standards. The objective being to limit the ‘total harmonic voltage distortion’ (VTHD) in power systems
to prescribed levels.
The primary objective of this website is to provide specific information on high quality, ‘state of the art’ passive and active harmonic mitigation solutions. Information is also provided on training courses and site harmonic and power quality surveys, the latter often an important component in the provision of an equitable and cost effective solution.
Education is the key to understanding harmonics and related issues, therefore this website permits the downloading of technical information in the subject areas pertaining to harmonics and associated power quality issues, whether through dedicated site information, the provision of editorials and interesting technical papers or via links to other companies and organisations.
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