JPS63164341U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing one embodiment of the automatic power factor adjustment device according to the present invention, Fig. 2 is a schematic diagram for explaining reactive power control of the same embodiment, and Fig. 3 is a power factor of the same embodiment. FIG. 4 is a schematic diagram for explaining control. FIG. 4 is a schematic diagram for explaining control switching operation of the same embodiment. 15... Input section (voltage input section), input section (current input section), 18... Judgment section, reactive power control section, power factor control section, hysteresis control section (CPU), 22
...Electric power system.

Claims (1)

[Scope of utility model registration request] In an automatic power factor adjustment device that measures the power factor of an electric power system and adjusts the power factor by turning on or disconnecting a power factor improvement capacitor based on the measurement result, the current and voltage of the electric power system are adjusted. An input section to take in, a judgment section that judges which range of the reactive power control range, power factor control range, or hysteresis control range the current and voltage taken in by this input section fall into, and this judgment section. a reactive power control section that controls turning on and off of a power factor improvement capacitor based on a reactive power setting value when it is determined that the current and voltage taken into the input section are within a reactive power control range; When the determination unit determines that the current and voltage taken into the input unit are within the power factor control range, a power that controls turning on and off of a power factor improvement capacitor based on a power factor setting value; When the ratio control unit and the determination unit determine that the current and voltage taken into the input unit are within the hysteresis control range, either reactive power control or power factor control is performed depending on the previous control. An automatic power factor adjustment device characterized by comprising a hysteresis control section that controls turning on and turning off a power factor improving capacitor.