Published by testguy, November 23, 2019. Website: testguy.net, Power Interruptions The most simple type of power quality problem occurs when power delivered to an electrical load goes away, this is called a “power interruption.” The different types of power interruptions are classified according to their duration. A momentary interruption is a complete loss of voltage on one or moreContinue reading “PQ Analysis: Power Interruptions”
Category Archives: Power Quality
Understanding Current and Voltage Harmonics
Published by L&T Electrical & Automation, Website: lntebg.in Source: https://www.lntebg.in/about-us/blog/understanding-current-voltage-harmonics/ Current and voltage harmonics are often used interchangeably. At most places, only harmonics is quoted and whether the values pertain to current or voltage is not mentioned. The differentiation can be done on the basis of their origin. Understanding Total Harmonic Distortion The current andContinue reading “Understanding Current and Voltage Harmonics”
Power Quality Measurements Near DER and Disturbing Loads
Published by Ir. M. van Lumig, Electrical Power Systems, Analysis and Concepts Laborelec NL Beek-Maastricht Airport, the Netherlands, e-mail: michiel.vanlumig@laborelec.com Ir. S. Bhattacharyya, Electrical Energy Systems Group Technical University Eindhoven Eindhoven, the Netherlands, e-mail: s.bhattacharyya@tue.nl Dr. ir. J.F.G. Cobben, Electrical Energy Systems Group Technical University Eindhoven Eindhoven, the Netherlands Prof.ir. W.L. Kling, Electrical Energy SystemsContinue reading “Power Quality Measurements Near DER and Disturbing Loads”
Power Quality Measurements in All Voltage Levels of the Utilities up to 150 kHz – Is it Possible?
Published by Roland Buerger (MBS AG), Business Development/R & D, MBS AG, Sulzbach-Laufen (Germany), Email: rbuerger@mbs-ag.com Bernhard Grasel (NEO MESSTECHNIK), Sales Manager, NEO Messtechnik, Zoebern (Austria), Email: bernhard.grasel@neo-messtechnik.com A reliable energy supply has meanwhile become an important location factor for many companies. While power failures and voltage fluctuations were among the most important parameters ofContinue reading “Power Quality Measurements in All Voltage Levels of the Utilities up to 150 kHz – Is it Possible?”
Harmonic Response of Distributed Grid Connected Photovoltaic Systems
Published by M. Patsalides is with Dept. of Elec. & Comp. Eng., University of Cyprus, 75 Kallipoleos Avenue, P.O. Box 20537 Nicosia, 1678, Cyprus (e-mail: ee03pm1@ucy.ac.cy). A. Stavrou is with Electricity Authority of Cyprus, Amfipoleos 11, 2025, Nicosia, Cyprus (e-mail: astavrou@eac.com.cy). G. Makrides is with Dept. of Elec. & Comp. Eng., University of Cyprus, 75Continue reading “Harmonic Response of Distributed Grid Connected Photovoltaic Systems”
Power Quality Standards for Utility Wind and Solar Power Plants
Published by David Mueller, E. H. Camm. Abstract Power quality standards exist to guide the interconnection requirements of large wind and solar plants. IEEE guidelines exist for flicker and harmonics, while IEC guidelines exist for the measurement criteria of power quality phenomena and the characterization of wind turbine equipment. There are also some uniform guidelinesContinue reading “Power Quality Standards for Utility Wind and Solar Power Plants”
Bridging the Gap Between Signal and Power
Assessing Power System Quality using Signal Processing Techniques Published by Math H.J. Bollen1, Irene Y.H. Gu2, Surya Santoso3, Mark F. McGranaghan4, Peter A. Crossley5, Moisés V. Ribeiro6, and Paulo F. Ribeiro7 Source: IEEE Signal Magazine, 2009 Signal processing has been used in many different applications, including electric power systems. This is an important category, sinceContinue reading “Bridging the Gap Between Signal and Power”
Part 7: AC Power Distribution Systems & Standards (Overcurrent, Fuse & Circuit Breaker)
Published by Nikola Zlatanov* Complete Overcurrent Device Interest in complete overcurrent device selectivity has increased due to the addition of selectivity requirements to articles 700, 701, and 708 of the National Electrical Code (NFPA70). Many users, both commercial and industrial, use fuses and circuit breakers simultaneously. Traditional Time- Current Curve (TCC) analysis is known toContinue reading “Part 7: AC Power Distribution Systems & Standards (Overcurrent, Fuse & Circuit Breaker)”
Part 6: AC Power Distribution Systems & Standards (Power Quality)
Published by Nikola Zlatanov* Power Quality Terms Technical Overview Introduction Sensitive electronic loads deployed today by users require strict requirements for the quality of power delivered to loads. For electronic equipment, power disturbances are defined in terms of amplitude and duration by the electronic equipment operating envelope. Electronic loads may be damaged and disrupted, withContinue reading “Part 6: AC Power Distribution Systems & Standards (Power Quality)”
Part 5: AC Power Distribution Systems & Standards
Published by Nikola Zlatanov* Medium Voltage Equipment Surge Protection Considerations Transformers If the voltage withstand/BIL rating of the transformer is less than that of the switchgear feeding the transformer, surge protection is recommended at the transformer terminals, in line with established practices. In addition, consideration should be given to using surge arresters and/or surge capacitorsContinue reading “Part 5: AC Power Distribution Systems & Standards”
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