Any two metal conductors separated by an insulating medium form a capacitor. Power capacitors are mainly used in power systems and electrical equipment. So what are the common types of power capacitors on the market? What are the functions of these power capacitors? Kurt will cover this in more detail in an upcoming article.

1. Parallel power capacitor

Shunt power capacitors are used to compensate the reactive power of the inductive load of the power system. It can improve system power factor, improve voltage quality and reduce line loss.

2. Series power capacitors

Series power capacitor is a capacitor connected in series in power frequency high voltage transmission line. It can compensate the distributed inductive reactance of the line, improve the system stability, improve the voltage quality of the line, lengthen the transmission distance and increase the transmission capacity.

3. Coupling capacitor

Coupling capacitors are used for high voltage power lines. Its function is high frequency communication, measurement, control and protection of high voltage power line, and can also be used as a part in the device that consumes electric energy.

4, circuit breaker capacitor

A breaker capacitor is a capacitor connected in parallel to the fracture of an uHV breaker. It can play a role of voltage equalization on the fracture of uHV circuit breaker, so that the voltage between the fracture is evenly distributed in the process of breaking and disconnecting. In addition, it can improve the arcing characteristic of circuit breaker and improve its breaking ability.

In addition, there are electric heating capacitors, pulse capacitors, dc and filter capacitors, standard capacitors and other types of power capacitors.

With the rapid development of industry in China, more and more enterprises are faced with reactive power problem. Shunt power capacitors, which can be used for reactive power compensation, can improve the power factor, improve the voltage quality and reduce the power loss, so they are widely used.