Magnetic flux leakage compensation structure

Abstract

An embodiment provides a magnetic flux leakage compensation structure, which includes an upper clamping piece and a lower clamping piece which are electrically disconnected from side-column tension plates and electrically connected with core-column tension plates, respectively, and which are electrically connected with each other through bypass cables. According to the magnetic flux leakage compensation structure provided by the embodiment, by the bypass cables connecting the upper and lower clamping pieces, currents flowing through the side-column tension plates and cores and induced voltages caused by the magnetic flux leakage in an electric circuit may be effectively avoided.

Claims

1. A magnetic flux leakage compensation structure, comprising an upper clamping piece (1) and a lower clamping piece (3), which are electrically disconnected from side-column tension plates (10) and electrically connected with core-column tension plates (6), respectively, and which are electrically connected with each other through bypass cable (5); and wherein tension plate screws (11) are arranged at upper ends of the side-column tension plates (10) which are connected with side-column upper beams (9) through the tension plate screws (11); insulating sleeves are arranged between the tension plate screws (11) and the side-column upper beams (9); an insulating plate is arranged between the side-column upper beams (9) and an upper clamping piece web (2); and lower ends of the side-column tension plates (10) are connected with a lower clamping piece web (4).

2. The magnetic flux leakage compensation structure according to claim 1, wherein the bypass cables (5) are connected with the upper clamping piece web (2) and the lower clamping piece web (4) through wiring blocks.

3. The magnetic flux leakage compensation structure according to claim 1, wherein the bypass cables (5) are copper stranded wires with sectional areas of 240-300 mm.sup.2 and are wrapped by 3-10 mm for insulation on single sides, and there are 3, 4 or 5 cables on each side.

4. The magnetic flux leakage compensation structure according to claim 1, wherein copper plates (7) are arranged at junctions of the core-column tension plates (6) and core-column upper beams (8) on the side where voltage regulation leads pass.

5. The magnetic flux leakage compensation structure according to claim 4, wherein the copper plates (7) are 10-15 mm thick.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a diagram showing connections of upper and lower clamping pieces on a switch side-high-voltage side.

(2) FIG. 2 is a diagram showing connections of upper and lower clamping pieces on a switch side-low-voltage side.

(3) FIG. 3 is a diagram showing connections of upper and lower clamping pieces on a non-switch side.

(4) FIG. 4 is a schematic diagram of core-column tension plates and side-column tension plates.

(5) FIG. 5 is a schematic diagram of a core-column upper beam and a side-column upper beam.

(6) FIG. 6 is a schematic diagram of an assembled copper plate.

(7) FIG. 7 is a schematic diagram of a structure of a copper plate.

(8) Reference numerals in the drawings are: 1: upper clamping piece, 2: upper clamping piece web, 3: lower clamping piece, 4: lower clamping piece web, 5: bypass cable, 6: core-column tension plate, 7: copper plate, 8: core-column upper beam, 9: side-column upper beam, 10: side-column tension plate and 11: tension plate screw.

DETAILED DESCRIPTION

(9) As shown in FIG. 1 to FIG. 3, a magnetic flux leakage compensation structure includes an upper clamping piece 1 and a lower clamping piece 3, which are electrically disconnected from side-column tension plates 10 and electrically connected with core-column tension plates 6, respectively, and which are electrically connected with each other through bypass cables 5.

(10) The bypass cables 5 are connected with an upper clamping piece web 2 and a lower clamping piece web 4 through wiring blocks. The bypass cables 5 are copper stranded wires with sectional areas of 240-300 mm.sup.2, such as sectional areas of 240, 250, 270 or 300 mm.sup.2. The bypass cables 5 are wrapped by 3-10 mm for insulation on single sides, such as insulation of 3 mm, 5 mm or 10 mm on single sides. There are 3, 4 or 5 cables on each side. For example, there are 3 cables on each side; there are 4 cables on each side; or there are 5 cables on each side.

(11) As shown in FIG. 4 and FIG. 5, tension plate screws 11 are arranged at upper ends of the side-column tension plates 10 which are connected with side-column upper beams 9 through the tension plate screws 11, and insulating sleeves are arranged between the tension plate screws 11 and the side-column upper beams 9. An insulating plate is arranged between the side-column upper beams 9 and the upper clamping piece web 2. Lower ends of the side-column tension plates 10 are connected with the lower clamping piece web 4.

(12) As shown in FIG. 6 and FIG. 7, 10-15 mm thick copper plates 7 are arranged at junctions of the core-column tension plates 6 and core-column upper beams 8 on the side where voltage regulation leads pass. For example, 10 mm thick copper plates 7 are arranged; 15 mm thick copper plates 7 are arranged; or 12 mm thick copper plates 7 are arranged.

INDUSTRIAL APPLICABILITY

(13) According to the embodiment of the invention, by the bypass cables connecting the upper and lower clamping pieces, currents flowing through the side-column tension plates and cores and induced voltages caused by magnetic flux leakage in an electrical circuit may be effectively avoided.