Power capacitor by purpose can be divided into eight: (1) parallel capacitor.
Originally called the phase-shift capacitor.
Mainly used for the compensation of perceptual load of power system reactive power, in order to improve the power factor, improve the quality of voltage, reduce the loss of line.
(2) the series capacitor.
Series in high pressure lose power frequency, power distribution line, to the distribution of the compensating circuit impedance, improve static and dynamic stability of the system, improve the quality of voltage circuit, longer transmission distance and increase transmission capacity.
(3) coupling capacitor.
Mainly used for high frequency high voltage power line communication, measurement, control, protection, and in the extraction of power device for parts.
(4) circuit breaker capacitor.
Originally called equalizing capacitor.
Parallel to fracture in ultra-high voltage breaker equalizing effect, make the fracture between the voltage in the process of breaking and disconnected evenly, and can improve the circuit breaker arcing characteristics, improvement points off ability.
(5) electric capacitor.
Used in the frequency of 40 ~ 24000 hz of electric equipment in the system, in order to improve the power factor, improve circuit voltage or frequency.
6 pulse capacitor.
Main storage can role for impulse voltage generator, impact current generator, the circuit breaker test with basic can storage element such as oscillation circuit.
All landowners and dc filter capacitor.
Used in high voltage dc devices and high voltage rectifier filter device.
Today standard capacitors
Used in power frequency high voltage dielectric loss measurement circuit, as a standard or device used to measure the capacitance differential pressure of high pressure.
In electric power systems in high voltage power capacitor,
And low voltage power capacitor,
Low voltage power capacitor according to the nature of the points in oil paper power capacitor power capacitor and self-healing type, according to the function of ordinary electric capacitor and intelligent type electric power capacitor.
Restated, emphasis on the general type is not intelligent type electric power capacitor.
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