Electromagnetic voltage-regulator

Abstract

An embodiment of the invention discloses an electromagnetic voltage-regulator with a single-phase voltage regulating mechanism. The single-phase voltage regulating mechanism is one of an A-phase voltage regulating mechanism, a B-phase voltage regulating mechanism and a C-phase voltage regulating mechanism which are the same in structure, and comprises a first iron core, a second iron core, a first induction winding, a first high-voltage winding, a second sending winding, a second high-voltage winding, a third induction winding, a third high-voltage winding, a fourth induction winding and a fourth high-voltage winding. The first iron core and the second iron core are in parallel mutually, the first induction winding, the first high-voltage winding, the second induction winding and the second high-voltage winding are wound on the first iron core, and the third induction winding, the third high-voltage winding, the fourth induction winding and the fourth high-voltage winding are wound on the second iron core. The electromagnetic voltage-regulator has the advantages of safety, high reliability and low cost.

Description

technical field [0001] The invention relates to the field of power equipment, in particular to an electromagnetic voltage regulator used for reactive power compensation of a power grid and soft start of an AC motor. Background technique [0002] At present, in order to improve the efficiency and reduce the reactive power of the power grid, it is necessary to adopt a reactive power compensation device. Traditionally, the method of adding a capacitor to a reactor is adopted, and there is a step-by-step input and a step-off, and the compensation effect is poor; if the compensation method of this patent is used to add a capacitor, It can realize stepless regulation of grid active power; [0003] At the same time, the step-down soft start of the high-voltage AC motor adopts a liquid soft start, and its starting performance is greatly affected by the ambient temperature. Different ambient temperatures have different starting effects, low safety and reliability, and troublesome mai...

AI Technical Summary

Problems solved by technology

[0002]At present, in order to improve the efficiency and reduce the reactive power of the power grid, it is necessary to adopt a reactive power compensation device, which is traditionally realized by adding a capacitor and a reactor, with staged input and staged removal. The compensation effect is poor; if the compensation method of the patented external capacitor is adopted, the active power stepless regulation of the power grid can be realized;

[0003]At the same time, the step-down soft start of the high-voltage AC motor, one is to use a liquid soft start, its starting performance is greatly affected by the ambient temperature, and the starting effect is different in different ambient temperatures, which is safe Low reliability and troublesome maintenance

The second is to use thyristor soft start, whose safety and reliability are affected by the current and voltage equalization problems of thyristors at different ambient temperatures, and the stability is poor, and the thyristor withstand voltage technology (especially high voltage) is a worldwide problem, so it is not suitable for use

The third is the traditional magnetic saturation reactor, due to its principle structure, its controllability and adjustability are not high because of the large magnetic flux leakage, and it needs to provide a separate DC power supply, so the overall investment cost is relatively high

The fourth is a self-excited solid-state soft starter, whose taps are directly drawn from the high-voltage coil, its safety and reliability are low, and its performance is affected by the position of the taps. The technology is not yet mature, that is, the applicant submitted on March 9, 2010 A copy of "Solid State Soft Starter for High-Voltage AC Motors", the application number is 2010201295356, belongs to the first generation of self-excited electromagnetic voltage regulation soft starter. Since the working voltage is above tens of thousands of volts, there is a very large potential safety hazard

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