An Adjustable Reactor Used in Power Quality Control

Abstract

The invention relates to an adjustable electric reactor used for controlling electric energy quality. An electric reactor iron core is formed by clamping one I-shaped iron core between two E-shaped iron cores with opposite openings, wherein an adjusting winding and a reactance winding are wound on middle iron columns of the two E-shaped iron cores respectively; a pair of permanent magnets with opposite magnetizing directions are embedded on the I-shaped iron core; and the two permanent magnets are located between the two pairs of opposite openings of the E-shaped iron cores respectively. By changing current in the adjusting winding, the magnetic conductivity of the iron cores is changed, so that the reactance value is changed. The adjustable electric reactor is simple in structure, low in construction cost and convenience for utilization and can be used for controlling the electric energy quality.

Description

technical field

[0001] The invention relates to a reactor, in particular to an adjustable reactor which can be used for power quality control. Background technique

[0002] With the increase of the grid capacity and the improvement of the quality requirements of the grid power supply, the adjustable reactor is more and more widely used in the power system: as a reactive power compensation device to absorb the capacitive reactive power of the grid, to ensure the stable operation of the grid; In the power filter, the harmonics of the power grid are filtered to ensure the quality of power supply; as the arc suppression coil, the inductive current is provided to neutralize the capacitive current in the single-phase ground fault, so that the arc is quickly extinguished and the line returns to normal; as a motor soft start device, high power The motor starts smoothly, avoiding the large impact of the large starting current on the power grid and causing the voltage and current fluc...

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