Author Archives: PQBlog

Standard EN 50160 – Voltage Characteristics of Public Distribution Systems

Published by Henryk Markiewicz, Email: henryk.markiewicz@pwr.wroc.pl, & Antoni Klajn, Email: antoni.klajn@pwr.wroc.pl, Wroclaw University of Technology, July 2004. Website: http://www.pwr.wroc.pl Source: Leonardo Power Quality Initiative (LPQI) Power Quality Application Guide Voltage Disturbances 5.4.2 Standard EN 50160 Introduction Electrical energy is a product and, like any other product, should satisfy the proper quality requirements. If electrical equipmentContinue reading “Standard EN 50160 – Voltage Characteristics of Public Distribution Systems”

Harmonics Mitigation and Power Quality Improvement in Grid Connected Wind Power Plant Using STATCOM

Published by Nasiru B. Kadandani, Department of Electrical Engineering, Bayero University, Kano, Nigeria. Email: nbkadandani.ele@buk.edu.ng. Published in: The Proceedings of Second International Conference on Electrical and Electronics Engineering, Clean Energy and Green Computing, Konya, Turkey, 2015. Abstract Grid integration of intermittent renewable energy sources like wind and solar is usually associated with power quality disturbanceContinue reading “Harmonics Mitigation and Power Quality Improvement in Grid Connected Wind Power Plant Using STATCOM”

PQ Analysis: Power Quality Reports

Published by testguy, November 23, 2019. Website: testguy.net Power Quality Reports A power quality meter can plot the voltage and current waveforms as functions of time, this is called an oscillogram. Data can be extracted from the power quality recorder and analyzed to determine the overall condition of the power system using various timeplots and tables. TheContinue reading “PQ Analysis: Power Quality Reports”

PQ Analysis: How Power Quality is Measured

Published by testguy, November 23, 2019. Website: testguy.net How Power Quality is Measured? Several types of instruments are available for power quality measurement, each serving their own unique purpose. Power quality analyzers are the most commonly used tools to observe real-time readings and also collect data at high speeds for downloading to computers for analysis, opposed to a powerContinue reading “PQ Analysis: How Power Quality is Measured”

PQ Analysis: Power Factor, Unbalance and Harmonics

Published by testguy, November 23, 2019. Website: testguy.net Power Factor, Unbalance and Harmonics Electrical loads are often composed of more than just pure resistance, the combination of resistance and reactance in an AC system is called the impedance. Reactance comes in two forms: inductive and capacitive, both of which do not contribute to “useful” work on theContinue reading “PQ Analysis: Power Factor, Unbalance and Harmonics”

PQ Analysis: Flicker, Transients and Noise

Published by testguy, November 23, 2019. Website: testguy.net Flicker, Transients and Noise Repetitive voltage reductions in lighting circuits can be detected by the human eye, a phenomena known as “flicker.” The term flicker refers to a very specific problem related to human perception of light produced by incandescent light bulbs, not necessarily general voltage fluctuations. Some commonContinue reading “PQ Analysis: Flicker, Transients and Noise”

PQ Analysis: Undervoltage, Overvoltage, Sags, Swells

Published by testguy, November 23, 2019. Website: testguy.net Undervoltage, Overvoltage, Sags, Swells The second most simple type occurs when voltage at the load drops below a minimum rated voltage or climbs above a maximum rated voltage for some period of time. Depending on how long these conditions last, they may be referred to as undervoltage or overvoltageContinue reading “PQ Analysis: Undervoltage, Overvoltage, Sags, Swells”

PQ Analysis: Power Interruptions

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”