8/20/2019 Which Type of Power Factor Correction to Use _ EEP http://slidepdf.com/reader/full/which-type-of-power-factor-correction-to-use-eep 1/6 Why it’s important to know which type of power factor correction to use Why it’s important to know which type of power factor correction to use (on photo: 300 KVAR automatic power factor correction (APFC) panel; credit to: eamfco.com) Practical and economical feasibility It’s important to understand where the capacitors are to be installed for a better exploitation of such advantages. There are no general rules applicable to every type of installation and, in theory, capacitors can be installed at any point, but it is necessary to evaluate the relevant practical and economical feasibility. According to the location modalities of the capacitors, the main methods of power factor correction are: 1. Distributed power factor correction 2. Group power factor correction 3. Centralized power factor correction
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Which Type of Power Factor Correction to Use _ EEP
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8/20/2019 Which Type of Power Factor Correction to Use _ EEP
In most installations there is not a constant absorption of reactive power for example due
to working cycles for which machines with different electrical characteristics are used.
ABB’s power factor monitoring, type ‘Dynacomp’
In such installations there are systems for automatic power factor correction
which, thanks to a monitoring varmetric device and a power factor
regulator, allow the automatic switching of different capacitor banks, thus
following the variations of the absorbed reactive power and keeping constant
the power factor of the installation constant.
An automatic compensation system is formed by:
Some sensors detecting current and voltage signals;
An intelligent unit which compares the measured power factor with the desired oneand operates the connection and disconnection of the capacitor banks with the
necessary reactive power (power factor regulator);
An electric power board comprising switching and protection devices;
Some capacitor banks.
8/20/2019 Which Type of Power Factor Correction to Use _ EEP