Power factor correction (PFC) aims to improve power factor, and therefore power quality. It reduces the load on the electrical distribution system, increases energy efficiency and reduces electricity costs. It also decreases the likelihood of instability and failure of equipment. There are devices that perform functions such as the elimination of noise, change, or stabilization of voltage, frecuency, and waveform.
The job of selecting the appropriate power correction device is fairly straightforward when it powers a single load. The requirements of only one load need to be considered. For larger systems that support many loads, the requirements of all loads need to be considered, as well as the potential interactions between them, to decide the appropriate enhancement equipment and system construction.
Below we present a set of devices through which it is feasible to implement power factor correction:
1.- Isolation transformers
2.- Noise filters
3.- Harmonic current solutions (Passive harmonic filter, Phase-shifting transformers, Active harmonic filter).
4.- Trasiente voltage surge suppresion.
5.- Voltage Regulators (Tap Changers, Buck Boost, Ferroresonante constant voltage transformers).
6.- Power Lines conditioners.
7.- Computer power distribution units.
8.- Magnetic Synthetizer.
9.- Motor - Alternator / Generator.
10.- Static transfer switches (STSs).
11.- Standby power systems (SPSs).
12.- Uninterrunpible power supplies (UPSs)
Some manufacturers take advantage of the extensive capability of some of the conditioners, such as the ferroresonant transformer, magnetic synthesizer, and M-G. The filtering capability allows them to use a very simple inverter circuit that generates square waves as opposed to sine waves. The line conditioner is in circuit all the time and provides conditioning of the inverter output as well as the utility during normal operation. Continuous regulated output power can be achieved by this method if the line conditioner has sufficient ride-through to power the load during the interruption time.
References:
1.- Webpage : https://electrical-engineering-portal.com/power-correction-devices.
2.- Power factor correction – What is it? Why is it required? How is it achieved?, Webpage: