Greece's Harmonic Study & Analysis
Care Labs provides electrical installation services such as electrical safety inspections, testing, calibration, and certification, as well as full harmonic investigation and analysis. Trained professionals will review harmonic risks, training programs, documentation, and personal protective equipment (PPE) to ensure your electrical safety program is current, compliant, and comprehensive.
Care Labs can detect harmonics early on and take suitable steps to limit the impact of harmonic distortions in order to assure the equipment’s safety. Electric voltages and currents known as harmonics can cause inefficiencies in the electrical system. They generate inefficient to heat and can degrade power quality.
Harmonic voltage analysis is a mathematical method for predicting potential resonances and harmonic distortion levels based on data. Nonlinear electrical switching devices such as AC variable frequency drives, DC drives, fluorescent lights, computers, and so on introduce harmonic frequencies into the electrical system.
During high harmonic voltage/current levels, there is a high risk of equipment malfunction. As a result, a timely harmonic study and analysis are critical. Harmonic limits in 415 voltage systems are currently 5%, with 4% odd harmonics and 2% even harmonics.
Harmonic Distortion Effects:
- Is responsible for circulating current and high voltage.
- Equipment failure and destruction as a result of excessive voltage distortion
- An increase in the presence of internal energy in components, resulting in component failure and a shorter life span.
- Tripping of branch circuit breakers due to a fault
- Measuring error
- Fires and explosions in the wiring and distribution system
- Generator outages
- A decrease in the system power factor
- Expensive installation and utility fees
- Productivity losses
- Downtime and unnecessary drive tripping
- The use of larger motors
Harmonic problems are extremely unlikely to occur, but when they do occur, they tend to reduce power system reliability, power quality, and efficiency. As a result, harmonic study and analysis are essential.
- Protects against voltage and current harmonics
- Restriction on frequency variation
- Unbalanced voltage and current
- Improve power factor analysis and keep the value near one.
- Regulates voltage fluctuations
Harmonic study and analysis will provide insight into the potential cause and effect of power quality issues, assisting in the avoidance of harmonic-related issues during the design stage and reducing the possibility of undesired effects.
Harmonic Study and Analysis Work Process at Care Labs:
- From the electrical one-line diagram, highlight available nonlinear loads, capacitor banks, and medium voltage cables of long length.
- Locate the point of common coupling (PCC)
- Identify in-plant system buses that are susceptible to harmonic distortions.
- Collect harmonics data from all nonlinear loads.
- Obtain critical data on voltage and current harmonics at the predetermined PCC, including the highest and lowest short circuit fault levels.
- Using ETAP, conduct harmonic analysis on the electrical network.
- Determine the total and discrete levels of current and voltage wave distortions at the buses and PCC.
- Draw the harmonic frequency spectrum.
- If the harmonic distortion levels exceed the allowable levels, an appropriate mitigation solution is proposed and implemented.
- Rerun the analysis after incorporating the mitigation solution.
Benefits of Care Labs Service:
If the background harmonics have already been measured, stage 2 involves higher ratings.
- If the background is less than 25%, stage 2 allows for variable converter size based on fault level and converter type.
- If the background is between 25% and 75%, converter ratings of half the value given above are permitted.
- A full harmonic investigation is performed for higher background.
