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Recent developments in technology & electronic devices are with nonlinear voltage-current characteristics, so generate harmonics.
It increased the penetration of non-linear loads in power systems of all capacities, whether it be corporates with the number of electronic goods or industrials with converters, VFDs, or residentials with an inverter, air conditioners.
Harmonics can disturb the correct working nature of machines and equipment.
Their characteristic of harmonic injection must be studied, analyzed, and taken corrective measures to save on power consumption costs and meet the utility standards.
Carelabs helps you with electrical installation study, testing, inspection, and certification services across the US. We have been offering harmonic study and analysis in different states of America.
A harmonic is commonly defined as a “periodic sinusoidal wave or quantity containing frequency that is an integral multiple of the fundamental frequency”. For a 50Hz system, the fundamental frequency is 50Hz(1st), Harmonic frequencies are 100Hz(2nd), 150Hz(3rd), etc.
It actually infers that the presence of harmonics in a power system means current and voltage waves are distorted. Non-linearities are measured in terms of harmonic levels.
In distribution networks, harmonics flowing indicates that disturbances in the power flow. The quality of electrical power has deteriorated and in turn, affects the efficiency of the system.
The presence of harmonics does not mean your electrical systems will crash. Most power distribution systems have a certain “stiffness” level that protects the equipment. But higher harmonic voltage and/or current levels will lead to failure of sensitive equipment.
The source of the harmonics will have very little or no effect at all, but the distortion will be carried through the power system and affect susceptible equipment. So that it’s essential to have trained professionals, to analyze the source of the problem.
Total harmonic distortion is the measure of the degree to which a waveform deviates from sinusoidal values. Our trained professionals analyze the percentages of harmonic distortion, and determine the severity of the condition.
As per IEEE 519-1992 standard the recommended voltage distortion limit is 5%, THD, and 3% for individuals. IEC 61000-3-2 defines the 40th harmonic of the power frequency (2.4 kHz for a 60 Hz system) as the upper limit of harmonics.
Any severity greater than these values indicate the need to find, and rectify the problem.
Harmonic studies are done to find, the level and effect of the distortions and evaluate mitigation methods in electrical power systems and determine whether harmonic voltages & currents are within acceptable limits.
IEEE 3002.8-2018 is the recommended practice to conduct harmonic studies and discusses the basic, need for harmonic analysis studies for industrial and commercial power system applications. Also discusses corrective measures and merits of computer as a tool to conduct harmonic studies.
The latest IEEE 519 is the recommended practice and requirements for controlling harmonics in electrical systems. It recommends harmonic limits of an industrial and commercial system.
Carelabs is an authorized ETAP service provider. We use ETAP software to perform harmonic study & analysis.
A harmonics analyzer is used to conduct the harmonic analysis study of electrical power quality to check the waveforms of current and voltage on respective system frequencies.
Our harmonic analysis study is performed in the following steps:
Managing the electrical utilities will help to protect equipment and contribute to a greener environment by reducing CO2 emissions.
Carelabs offer power system study and analysis service to various industries including plants, retailers, traders, manufacturers, national and state governments, NGOs, and various other buyers & sellers in the global markets.
We offer our services in New York, Ohio, Illinois, New Mexico, New Jersey, Texas, Georgia, Florida, Washington, California, Massachusetts, Michigan, North Carolina, Pennsylvania, Virginia, and all the major states and cities in the United States of America.
For more information about our harmonic study & analysis or to avail of service, please contact us.
Damages to property and company personnel working in the vicinity of arc flash accident can be staggering.....
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