How to achieve “harmonic mitigation” ?
Several different solutions are proposed for Harmonic mitigation. The right choice is always dependent on a variety of factors, such as the activity sector, the applicable standards, the power level …. Several solutions are relative to Variable Speed Drives, as this type of electrical equipment represents a large part of the installed power in industrial installations and the most significant power harmonic current generators.
Archive for the ‘Power quality’ Category
7/8 – Electrical equipment: harmonic mitigation
February 11th, 2010 | Make a comment | Posted in Power qualityTags: active filters, active front end, electrical equipment, harmonic mitigation, hybrid filter, passive filters, power harmonic
GPS synchronization for power system s
January 27th, 2010 | 7 Comments | Posted in Power qualityTags: critical power, dcf77, gps synchronization, irig-b, power system, power system reliability
GPS time Synchronization: Power system reliability starts with precision timing.
Precision timing is required for monitoring and control of electrical power networks where power system reliability is important. Circuit breaker control schemes require precise timing to ensure proper operation, and Sequence of Events Recording systems report events with one-millisecond precision to aid diagnostics and troubleshooting. Typical “critical power” applications include electric utility networks, data centres, hospitals, water treatment plants, refineries, and other process industries.
6/8 – Electrical equipment: improve power factor
January 20th, 2010 | 7 Comments | Posted in Power qualityTags: capacitor bank, power factor, power factor correction, reactive power
How to improve power factor ?
Power factor has been defined earlier as a function of active and apparent power. For sinusoidal (undistorted) voltage and current, a vector representation is also possible and helpful.
For most electrical loads like motors, the current I is lagging behind the voltage V by an angle phi.
Ia is called the “active” component of the current.
Ir is called the “reactive” component of the current.
Voltage and current vectors
5/8 – Electrical equipment: power harmonics, power factor
December 12th, 2009 | 3 Comments | Posted in Power qualityTags: electrical equipment, power factor, power factor correction, power harmonics
The benefits of Power Factor Correction and Power Harmonic mitigation
6 Benefits are described here:
- Reduce electricity bill
- Reduce power losses
- Reduce cable size
- Comply with power harmonic emission limits requested by Utilities
- Improve process quality
- Improve business performance
(more…)
4/8 – Electrical equipment: power harmonics, power factor
November 30th, 2009 | 8 Comments | Posted in Power qualityTags: active power, electrical equipment, power factor, power factor correction, power harmonics
How Power Factor and Harmonics relate to Energy Efficiency?
In an AC distribution system, the maximum active power is transmitted to a load when voltage and current are undistorted and in phase.
3/8 – Electrical equipment: power harmonics
November 16th, 2009 | 1 Comment | Posted in Power qualityTags: electrical equipment, harmonic distorsion, power harmonics
What are Power Harmonics ?
The presence of power harmonics in electrical systems means that current and voltage are distorted and deviate from sinusoidal waveforms.
2/8 – Electrical equipment: power factor
November 9th, 2009 | 6 Comments | Posted in Power qualityTags: active power, electrical equipment, power factor
What is “Power Factor”?
power factor definition
The definition of “Power Factor” relies on the definitions of “active power” and “apparent power”.
1/8 – Electrical equipment: power harmonics, power factor
October 26th, 2009 | 4 Comments | Posted in Energy Efficiency - kvar, Power qualityTags: active power, electrical equipment, power factor, power harmonics
Re active energy and power harmonics explained with a car
How to understand harmonics & re active energy
Are you a driver? I am sure yes, therefore you will understand power harmonics right away
Imagine a straight road, flat, a perfectly smooth surface, a constant speed. Your car works well, consumes as little as possible, and can run indefinitely.
It’s like an electrical grid with a constant power without harmonics.
Harmonics overview
October 12th, 2009 | 4 Comments | Posted in Power qualityTags: active filters, harmonics, passive filters, Power quality, Power quality meter
Why harmonics problem? 3 types of solutions! How to make a choice ? Any software tools ?
Typical distorted current waveforms
electrical installation harmonic problems part 4
September 28th, 2009 | 2 Comments | Posted in Power qualityTags: electrical installation, harmonic problems
