What are scenarios causing power factor displacements
1. Poorly designed electrical systems with inadequate power factor correction equipment.
2. Large inductive loads such as motors, transformers, and generators that cause lagging power factor.
3. Unbalanced three-phase loads that cause phase displacement of the current and voltage waveforms.
4. Unbalanced single-phase loads that cause current and voltage waveforms to be out of phase with each other.
5. High harmonic content in the electrical system caused by non-linear loads such as rectifiers, inverters, and computers. 6. Poorly maintained electrical systems with loose connections or damaged components causing high resistance in the circuit resulting in a low power factor.
In this article, we focus on harmonics and its solution (Active) Harmonic Filter
What is a Harmonic Filter?
A harmonic filter is an electrical device that is used to reduce the amount of harmonic distortion in a power system. It works by filtering out the higher frequency harmonics and allowing only the fundamental frequency to pass through. Harmonic filters are commonly used in industrial and commercial applications to reduce the amount of harmonic distortion created by non-linear loads such as variable speed drives, computers, and other electronic equipment.
What is a Harmonic Filter made of?
A harmonic filter is typically made of an inductor, capacitor, and resistor. The inductor and capacitor are connected in series to form a tuned circuit, while the resistor is connected in parallel to form a damping element. This combination of components helps to reduce the harmonic distortion caused by non-linear loads.
What is an Active Harmonic Filter made of?
An ACActive Harmonic Filter is typically made of a combination of power electronics components, such as power capacitors, reactors, and inverters. These components are used to create a three-phase AC voltage source that can be used to cancel out the harmonics present in the system.
What are the various types of harmonic filters?
1. Active Harmonic Filters: These filters use active components such as transistors, thyristors, and other semiconductor devices to reduce harmonic distortion.
2. Passive Harmonic Filters: These filters use passive components such as inductors, capacitors, and resistors to reduce harmonic distortion.
3. Hybrid Harmonic Filters: These filters combine both active and passive components to reduce harmonic distortion.
4. Tuned Harmonic Filters: These filters are tuned to a specific frequency or range of frequencies in order to reduce harmonic distortion at those frequencies.