By HDK / Published on Tue, 2009-09-15 14:55
In cooperation with PSERC, we are pleased to offer access to this archived webinar. To watch the recording (56 minutes), click the link in the further reading block.
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By HDK / Published on Tue, 2009-06-09 12:58
All users of an electrical power system expect that the frequency and voltages are maintained within acceptable boundaries at all times. Some participants, mainly generating units, provide the necessary frequency and voltage control services, called ancillary services. Since these participants are entitled to receive a payment for the services provided, markets for ancillary services have been developed along with the liberalisation of electricity markets. However, current arrangements vary widely from a power system to another.
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By Hans De Keulenaer / Published on Thu, 2008-01-31 14:30
By I Zhezhelenko et al
The authors consider the issues of studying interharmonics generated by direct frequency converters. One of aspects of the problem of power quality - questions of appearance of additional power losses in the elements of electrical networks are considered in the paper. Application areas of the filters of different orders intended for reduction the levels of the interharmonics generated by frequency converters are described.
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By Hans De Keulenaer / Published on Fri, 2008-01-25 16:18
By J Mindykowski et al
This paper is focused on problems of power quality in systems with varying frequency, equipped with passive harmonics filter. Main differences between the ship system and land network have been pointed out. Influence of varying frequency on proper work of harmonic passive filters frequency change was presented. Simulation circuit and simulations results of theoretical research have been described. Especially influence of frequency on proper work of 5th and 7th harmonic filters was commented on.
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By Hans De Keulenaer / Published on Wed, 2007-11-28 13:09
As the fifth in a series of tutorials on the power system, Leonardo ENERGY introduces its minute lecture on voltage and frequency control, using the analogy of a metal/rubber plate to demonstrate the centralised nature of frequency control, whereas voltage control is more a local matter.
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