What is a Harmonic Filter Reactor in Transmission systems?

  • 28 Jan, 2020

A filter reactor or Harmonic filter reactor is used to filter out higher harmonics in an electrical transmission system for safe use. It protects reactive power compensation equipment from overload or excessive harmonic levels. Used in medium and low voltage distribution systems, Harmonic filter reactors are also known as detuned reactors, passive harmonic filters, unsteady filters, and, low passband filters. Depending on the requirements, they are used in various configurations in an electrical power system to remove unwanted harmonics. They are used as a fixed impedance load and come in the structure of the coil calculated according to certain calculations.

In a power transmission system, harmonic filter reactors are used to reduce the harmonic current and control the amplitude of the ripple current. They can be connected in either parallel or series with a capacitor bank to serve the purpose at a power station. They are custom designed by the manufacturers to serve unique requirements of a power transmission system based on harmonic levels and ambient temperature. It can be customized on various aspects such as the winding of the coils with copper wire, copper or aluminum foil, various termination options, and temperature monitoring to meet the customer needs.

Advantages of using Harmonic Filter Reactors

  • Limits the flow of harmonic current from non-linear loads on the capacitor
  • Prevents the increment of harmonic current and voltage amplitude
  • Prevents high current stress and heat
  • Filter reactors increase the operating life of a capacitor
  • No overcurrent and heating problems on electrical equipment

If you are using nonlinear loads at your power station then it is required to install harmonic filter reactors in compensation systems. Contact a professional manufacturer in the industry who has years of experience in designing electrical equipment for your needs. If you are someone who is looking for harmonic filter reactors, then you should first list out your requirements and operating conditions to find out the right filters for your purpose. When buying filter reactors, keep in mind the parameters to match your requirement:

  • System voltage
  • Rated voltage
  • Rated frequency
  • Rated current
  • Harmonic current
  • Rated inductance
  • Rated quality factor
  • Rated short-time current and duration
  • Type of Insulation
  • Rated loss
  • Average temperature rise
  • Hot spot temperature rise
  • Sound level

Always prefer professional manufactures that can help you with your custom requirements in the need of harmonic filter reactors. They will also take care of the whole installation process at your site by following the best practices and keeping in mind the operating conditions of your site.