Magnetic modulating method and apparatus of hollow filter reactor

Abstract

The invention discloses a magnetic regulating method of a hollow filter reactor and a magnetic regulating device thereof; the method is as follows: magnetic regulating units are arranged along the direction of magnetic force lines at the upper part and lower part of the hollow filter reactor which are located at the inner side of a coil and correspond with the intensive place of the magnetic force lines; the magnetic regulating units are uniformly distributed along the circumferential direction; by increasing or decreasing the number of magnetic regulating units, the magnetic resistance is changed; when all the magnetic regulating units are put, the inductance value can reach a set maximum adjustment amount; when all the magnetic regulating units are removed, the inductance value can reach a set minimum adjustment amount; when different number of magnetic regulating units are put, the changing range of the inductance value is from the minimum adjustment amount to the maximum adjustment amount; the magnetic regulating device of the hollow filter reactor comprises a coil frame which is winded with a main coil; and the magnetic regulating units are arranged along the direction of magnetic force lines at the upper part and lower part of the coil frame which are located at the inner side of the main coil. The invention has the advantages of convenient adjustment, easy connection, large inductance value adjustment range, simple and compact structure, small volume, material conservation, and manufacturing cost reduction.

Description

technical field [0001] The invention particularly relates to a magnetic regulation method and a magnetic regulation device of an air-core filter reactor. Background technique [0002] The adjustable air-core filter reactor is the main component of the AC filter device used to control harmonics in the power system. It is tuned and resonated to a certain frequency after being connected in series with a capacitor to achieve the purpose of filtering out the harmonic. According to the national standard, the adjustment range of the inductance value of the adjustable air-core filter reactor is 5% to +5%. [0003] There are two adjustment methods of the existing adjustable air-core filter reactor, one is the coil tap type, and the other is the coil separation type. The coil tap type is to install a secondary coil outside the main coil. There is a slidable tap on the secondary coil. The processing is complicated. The adjustment of the inductance value is realized by changing the pos...

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Problems solved by technology

[0004] The separated air-core filter reactor is to make the main coil into two separable coils, and then connect the two coils with a set of adjustable lifting mechanism, and adjust the inductance value by changing the mutual position of the two coils, which is troublesome to adjust. high manufacturing cost

[0005] Corresponding to the above two adjustment methods, there are common shortcomings: 1. The reactor has a complex structure, large volume, and takes up a lot of space; 2. Inconvenient adjustment and difficult electrical connection; 3. High material consumption and high manufacturing cost; 4. Inductance value small adjustment range

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