Plug-and-play adjustable impedance device

Abstract

The present invention discloses a plug-and-play adjustable impedance device. The device comprises a mutual inductor, an inverter and a modulation signal generation module. Primary side winding of the mutual inductor is a transmission line passing through an iron core between power supply and a load, the number of windings of the primary side winding is one, the iron core of the mutual inductor is a long and thin and cylindric or is suitable for long and thin cuboid of a busbar; the modulation signal generation module is configured to generate modulation signals of the inverter, the modulation signals are generated through superposition of first reference signals and second reference signals, the first reference signals are obtained through first multiple amplification of fundamental wave signals, and the second reference signals are obtained through second multiple amplification of fundamental wave signals after 90-degree phase shift; and the inverter is configured to convert direct current signals to alternating current voltage signals having the same frequency with the modulation signals and load the alternating current voltage signals to two ends of the secondary side winding of the mutual inductor to regulate the amplitude and phase of the primary side fundamental wave equivalent impedance of the mutual inductor through the first multiple and the second multiple. The plug-and-play adjustable impedance device can realize continuous stepless adjustable impedance.

Description

technical field [0001] The invention belongs to the technical field of adjustable reactors, and more particularly relates to a plug-and-play adjustable impedance device. Background technique [0002] Adjustable reactor is a flexible AC transmission system device, which has been widely used in improving system power flow distribution, adjusting grid reactive power balance, stabilizing voltage and increasing system operation stability. A variety of adjustable reactors based on different principles have been developed in the past ten years. There are two main types of controllable reactors for commercial applications: inductors, also known as saturable reactors, and thyristor-controlled reactors. [0003] However, the existing saturable reactors will generate unbearable noise, and the thyristor-controlled reactors will generate a large number of harmonics, and they need to be connected in series in the line, and the power supply of the grid needs to be cut off when connecting ...

AI Technical Summary

Problems solved by technology

[0004] In view of the defects of the prior art, the purpose of the present invention is to solve the unbearable noise generated by the existing saturable reactor, and the thyristor-controlled reactor will generate a large number

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