Active and Passive
Harmonic Filtering
Systems
High-quality, specific and cost-effective
solutions for reactive power compensation
and harmonic problems of conventional loads.
Primary Benefits
- Filtering of harmonics
- Power factor correction
- Lowering harmonic resonance problems
- Voltage regulation improvement
- Decreasing network losses
Application Areas
- Transmission and Distribution Systems
- Metal Industry
- Mining Industry
- Textile Industry
- Commercial Facilities
Passive Filters Features
- Formed from the combinations of passive elements – capacitors, inductors, resistors
- Low cost solution for bulky reactive power compensation and harmonic filtering
- Limited harmonic filtering performance
- Poor design can arise severe resonance problems
- Requires detailed system study for proper operation
Passive Filters Types
- High pass filters are also named as damped filters.
- Generally used for the filtering of harmonics higher than 13th harmonics.
- Tuned filters are generally tuned to a specific frequencies like 3rd,5th,7th,11th and 13th to present low impedance to a particular harmonic current.
- C-type filter is generally used for attenuation of low order harmonics and inter-harmonics created by EAFs and HVDC transmission systems.
Active Power Filter How it works?
Active Power Filter (APF) acts as a harmonic
source, which measures the harmonic content of
the load current and injects the opposive of it on
a real time basis, thus makes the current
waveform a pure sinosoidal on the source side .
Primary Benefits
Application Areas
- Filtering of current harmonics
- Damping of voltage harmonics
- Harmonic resonance suppression
- Power factor correction
- Load balancing
- Distribution Systems
- Textile Industry
- Paper Industry
- Automotive Industry
- Commercial buildings; Banks, Hospitals, Shopping Centers, Hotels, Data Centers etc.
Active Power Filter Features
- Superior power conditioning device for the compensation of harmonics and reactive power caused PQ problems
- VSC based power circuit topology
- Features
- Current harmonic compensation
- Voltage harmonic damping
- Power system resonance prevention
- Power factor correction
- Load balancing
References
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