HGA 5% Active Harmonic Filter

Actively limits Harmonic Distortion

  • TDD reduction to 5% or better at Full Load

  • Meets IEEE-519 1992

  • Improves true power factor - improves energy efficiency

  • System-applied - MCC & Switchboard

  • Touchscreen display

  • Communication options include Modbus RTU over RS485 and EtherNet/IP

New features available

New capabilities are available on the already high-performing Active Harmonic Filter product family.  This latest release includes additional functionality which allows the HGA to operate in a wider variety of applications and to solve a broader array of harmonic problems.

  • 600 VAC System Compatibility

  • UL Type 3R Enclosure

  • 200 Amp and 300 Amp

 

HarmonicGuard Active Filter   

HarmonicGuard Active

The HGA active harmonic filter actively monitors the load current, reacting to changes in load almost instantaneously, while returning true power factor to near unity:

  • Virtual real time correction of the non-linear current

  • Synchronization of the current and voltage waveforms

  • Always attempting to achieve unity power

  • Never allowing for leading power factor

 

New HMI Display Video

Learn about our new fully featured 6", 65k color touchscreen HMI display in this video.
If you are unable to view this link, the video can also be downloaded.

  HMI Display for active harmonic filter

 

Harmonics and Power Quality

Variable frequency drives and other types of non-linear loads take the incoming power from the utility and modify it for more efficient use within a wide range of applications. The conversion process creates current and voltage distortion.

If non-linear loads represent a significant portion of the entire installed load, this distortion begins to cause problems throughout the electrical system:

  • Transformer and distribution equipment overheating

  • Random breaker tripping

  • Sensitive equipment may fail completely

  • Poor power factor

 

Performance

Non-linear Load Waveform   Resulting Line Current Waveform with HGA
Unfiltered Application with Injection Current   Resulting Current waveform with HGA
Unfiltered waveform with Injection Current from the HGA    

 

By actively monitoring the line or load current, the HGA harmonic filter determines the nature and quantity of harmonic currents in the system and cancels the same by injecting equal amounts of harmonic currents opposite in phase. A state-of-the-art high speed DSP controller and a pulse width modulated (PWM) IGBT based power converter help to provide virtual real time compensation of non-linear load demanded by VFDs and other applications. HGA also inherently tries to synchronize the line current with its voltage resulting in near unity displacement power factor. Thus, HGA provides solutions for both reactive current and harmonic current compensation.

 

Meeting IEEE-519 Recommendations on Harmonics

The HGA active harmonic filter provides a cost effective, efficient solution allowing the user to meet IEEE-519 requirements. Using harmonic analysis software, TCI can help customers meet IEEE-519. Typical applications include:

  • Wastewater treatment plants

  • Commercial buildings

  • Hospitals

 

HGA Filters versus Other Harmonic Solutions

The HGA active filter can be a better overall system solution when compared to large, expensive 18 pulse VFDs or multiple passive drive-applied filtering:

  • Save money

  • Save space

  • Reduce energy losses

 

Bus-Applied Configuration for MCC or Switchboard

This bus-applied filter design can be directly connected to the power bus in standard MCC and Switchboard configurations. As with other bus-applied designs, impedance must be installed on the load side of the HGA filter.

 

Product Specifications

  • TDD Reduction to 5% or better at Full Load
    Power Factor Correction to less than or equal to .98 lagging

  • Power Factor Improved to near Unity

  • Response time of less than 8 ms to step load changes

  • Additional filters can be added to increase correction capability

  • Units can be paralleled without any calibration

  • Self-Commissioning Installation

  • Modular design

  • Harmonic Cancellation to the 50th harmonic

 
The HGA active harmonic filter is a very sophisticated, stable, and effective solution for harmonic and reactive power compensation.

 

IEEE Standard 519-1992, Table 10-3

IEEE Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems

Current Distortion Limits for General Distribution Systems (120V through 69,000V)
Maximum Harmonic Current Distortion in Percent of I L
Individual Harmonic Order (Odd Harmonics)

ISC/IL <11 11≤h<17 17≤h<23 23≤h<35 35≤h TDD
<20*  4.0  2.0  1.5  0.6  0.3  5.0
 20<50  7.0  3.5  2.5  1.0  0.5  8.0
 50<100  10.0  4.5  4.0  1.5  0.7  12.0
 100<1000  12.0  5.5  5.0  2.0  1.0  15.0
 >1000  15.0  7.0  6.0  2.5  1.4  20.0

Even harmonics are limited to 25% of the odd harmonic limits above. Current distortions that result in a dc offset, e.g. half-wave converters, are not allowed.

*All power generation equipment is limited to these values of current distortion, regardless of actual ISC/IL (ISC = maximum short-circuit current at PCC; IL = maximum demand load current, fundamental frequency component, at PCC).

 

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