Most common types of active harmonic filters (APF)

What are the 5 most common types of active harmonic filters (APF)? 

There are several types of active harmonic filters, including: 

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Active current source filter

This type of active filter is used to correct the power factor and compensate harmonic currents in a specific load. 

It works by injecting a compensation current in parallel with the load, which helps to reduce harmonic distortion and improve the power factor. 

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Voltage source active filters

This type of active filter is used to improve the quality of the electrical voltage supplied by the power grid. 

It works by injecting a compensation voltage in series with the load, which helps to reduce harmonic distortion and voltage fluctuations. 

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Series active filter

This type of active filter is used to mitigate harmonics and other voltage fluctuations in a specific load. 

It works by injecting a compensation voltage in series with the load, which helps to reduce harmonic distortion and improve electrical voltage quality. 

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Shunt active filter 

This type of active filter is used to mitigate harmonics and other voltage fluctuations throughout the electrical network. 

It works by injecting a compensating current in parallel with the power grid, which helps to reduce harmonics and other voltage fluctuations. 

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Adaptive active filters

These filters use a control algorithm that can adapt to changes in harmonic distortion in the power system, allowing more efficient and accurate filtering of harmonic frequencies. 

In general, active harmonic filters are classified according to the type of converter used and the control algorithm. The choice of active harmonic filter will depend on the specific application and the type of harmonic distortion present in the power system. 

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At Diram we have active filters and other products to optimize your current operation and implement a medium or low voltage solution that is in regulatory compliance. Contact our consultants to review the needs of your plant and recommend the best option for you.

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