Harmonic Filters

HARMONIC FILTERS



With over 100 man years experience in Power quality, we possess a reliable skill set in designing precise filters for the systems. We are backed up with our various analysis software including ETAP, PSPICE, MATLAB, PSCAD etc along with our in-house developed software. With our experience in Arc furnaces and SVC's we deliver a vast array of passive filters:
A passive Harmonic Filter :
Is built using an array of capacitors, inductors, and resistors. It can take the form of a
simple line reactor or may use a series of parallel resonant filters to eliminate harmonics.

Passive harmonic filters are also divided based on the way they are connected
with the load - -
Series Filter :
Here the filter is placed in series with the load and uses parallel components. i.e., inductors and capacitors are in parallel. This filter is a current rejecter.

Parallel Filter :
The filter is placed In parallel with the load and its components are built in series. This filter Is a current acceptor

Based on the components used to build the passive filter, there are the following types:

  • Band Pass Filter :
    Is a common passive filter that is built using a capacitor connected in series with a resistor.

  • High Pass Filter :
    has a resistor connected in parallel with a reactor. This helps in reducing the q value of the filter, which will In turn help reduce the higher frequencies,

    When a High Pass Filter is used in combination with a band-pass filter will provide a solution for medium voltage and sub transmission voltage networks, which have moderate harmonic distortions.

  • C Type Filter :
    Is used for complex loads, cyclo converters and electric arc furnaces and is a special variation of the high pass filter. This filter will provide the load with reactive power and avoid forming parallel resonance circuits with the load.

Quality Power undertakes turnkey projects as well as provides complete system engineering support for Harmonic Filter Solutions.

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Quality Power undertakes turnkey projects as well as provides complete system
engineering support for Harmonic Filter Solutions.
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