Three phase voltage-stabilizing controller and its control method

Abstract

This invention relates to three phase stabilizing regulator comprising microcomputer sampling controller, control circuit and three phase compensation transformer. The characters are: secondary winding of each phase of the transformer having only one coil, and series connected between power source and load; each primary winding having more than one coils and taps, each tap being connected to corresponding phase and zero line of input three phase power source by corresponding contactor of control circuit or contact of solid relay. The main control point is that: phase voltage and / or line voltage in regular or irregular order combination is imposed upon each coil of primary winding of compensationt ransformer, to achieve even compensation, lowering working current in primary winding of compensation transformer. Advantaegs are: simple structure, low cost, high stability precision.

Description

technical field [0001] The invention relates to a circuit device for compensating reactive power, in particular to a voltage stabilizing and regulating device and control method for phase voltage and line voltage of a three-phase circuit. Background technique: [0002] The voltage fluctuation of the existing power grid often exceeds the national regulations during the peak period and the low peak period, even exceeding ±10%, especially the terminal voltage of the low voltage 380V is particularly unstable. The current voltage regulating and stabilizing devices are mainly servo-type voltage regulating methods, and the servo motor type uses carbon brushes for voltage regulation, and the phenomenon of arcing when the carbon brush replaces the thread end slot is easy to burn out the coil and has a high failure rate. It is not suitable for use in relatively harsh environments, which will reduce the operating performance and service life of electrical equipment, and even cause some...

AI Technical Summary

Problems solved by technology

The current voltage regulating and stabilizing devices are mainly servo-type voltage regulating methods, and the servo motor type uses carbon brushes for voltage regulation, and the phenomenon of arcing when the carbon brush replaces the thread end slot is easy to burn out the coil and has a high failure rate. It is not suitable for use in relatively harsh environments, which will reduce the operating performance and service life of electrical equipment, and even cause some equipment with strict voltage requirements to fail to work normally, and will also greatly increase energy consumption. The current voltage regulation technology and products have complex structure, poor reliability and high cost, which hinder the wide application of voltage regulation technology.

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