Classification of capacitors

Power capacitors can be divided into 8 types according to their uses

① Shunt capacitor. Originally called phase-shifting capacitor. It is mainly used to compensate reactive power of inductive load in power system to improve power factor, voltage quality and line loss.

② Series capacitor. Series connected in power frequency high-voltage transmission and distribution lines to compensate the distributed inductive reactance of the line, improve the static and dynamic stability of the system, improve the voltage quality of the line, lengthen the transmission distance and increase the transmission capacity.

③ Coupling capacitor. It is mainly used for high-frequency communication, measurement, control and protection of high-voltage power lines, as well as components in the device of extracting electric energy.

④ Circuit breaker capacitor. It was originally called equalizing capacitor. Parallel connection can equalize the voltage on the fracture surface of very high voltage circuit breaker, make the voltage between each fracture surface even in the process of breaking and breaking, improve the arc extinguishing characteristics of the circuit breaker, and improve the breaking capacity.

⑤ Electric heating capacitor. It is used in the electric heating equipment system with the frequency of 40 ~ 24000 Hz to improve the power factor and the voltage or frequency characteristics of the circuit.

⑥ Pulse capacitor. It is mainly used for energy storage, such as impulse voltage generator, impulse current generator, oscillation circuit for circuit breaker test, etc.

⑦ DC and filter capacitors. It is used in high voltage direct current device and high voltage rectifying filter device.

⑧ Standard capacitor. It is used as a standard capacitor or a capacitive voltage divider for measuring high voltage in the circuit of power frequency high voltage measuring dielectric loss.

In the power system, it is divided into high voltage power capacitor (above 6kV) and low voltage power capacitor (400V); low voltage power capacitor is divided into oil immersed paper power capacitor and self-healing power capacitor according to its nature, ordinary power capacitor and intelligent power capacitor according to its function.

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