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Low-noise high-voltage power capacitor unit

A technology of power capacitors and capacitor units, which is applied in the direction of anti-noise capacitors, feedthrough capacitors, multiple fixed capacitors, etc., to achieve the effects of reducing noise, being convenient to use, and preventing the spread of noise

Inactive Publication Date: 2009-11-11
GUILIN POWER CAPACITOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Install sound-absorbing devices at the upper and lower ends of the capacitor unit case

Method used

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  • Low-noise high-voltage power capacitor unit
  • Low-noise high-voltage power capacitor unit
  • Low-noise high-voltage power capacitor unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1 of the present low noise high voltage power capacitor unit is as Figure 1 to Figure 3 As shown, the terminal 1 including the capacitor unit, the capacitor case 3, and the core 7 mainly composed of capacitor elements connected in series and parallel are located in the case and immersed in the insulating impregnating agent. The cavities separated by partitions at the top and bottom of the capacitor unit case 3 are sound-absorbing chambers 2 and 4 respectively, and the partitions 2-1 and 4-2 of the sound-absorbing chambers 2 and 4 are connected to the capacitor case 3 by electric welding or Connected by argon arc welding or other welding methods; the sound-absorbing chamber 2 on the top has a hole to match the terminal 1 of the capacitor unit, the terminal 1 passes through the sound-absorbing chamber 2, and the lower partition 2-1 is sealed with the base of the terminal 1, in this example The partition 2-1 of the sound-absorbing chamber 2 and the base of the ...

Embodiment 2

[0022] Embodiment 2 of this low noise high voltage power capacitor unit as Figures 4 to 6 As shown, the capacitor unit also includes a connection terminal 1, a capacitor case 3 and a capacitor core 7 and an impregnating agent therein. The top and bottom ends of the capacitor unit case 3 are respectively equipped with a vibration energy dissipation device 6. The vibration energy dissipation device 6 is a combined insulating plate, which is a 6-layer overlapping insulating frame plate 6-1 and insulating vibration plate 6-2. , between every two layers of frame plates 6-1 is a layer of vibrating plates 6-2, the frame plates 6-1 are perforated plates with a thickness of 3mm, the area of ​​square holes accounts for 80% of the total area, and there are 7 The rectangular frame with the same top and bottom rectangles. The frame plate 6-1 in this example is a paper porous plate, and it can also be an epoxy porous plate or a phenolic porous plate. The insulating vibrating plate 6-2 is ...

Embodiment 3

[0024] Embodiment 3 of the present low noise high voltage power capacitor unit as Figure 7 As shown, the top and bottom of the capacitor unit case 3 are provided with sound-absorbing cavities 2, 4 and vibration energy dissipating devices 6 are installed, and the other structures of the capacitor unit are the same as those in Embodiments 1 and 2.

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Abstract

The invention provides a low-noise high-voltage power capacitor unit, which comprises a mandril, a box shell and a wire connecting terminal, wherein the upper end and the lower end in the box shell are provided with sound-absorbing devices; the sound-absorbing devices are sound-absorbing cavities and / or vibration energy-dissipating devices; the sound-absorbing cavities are cavities of which the upper ends and the lower ends in the box shell are parallel to the placement direction of an element and the inner height divided by a partition plate is 1 to 100 mm, and the inner wall can adhere a sound-absorbing material with the thickness of 0.1 to 10 mm; the vibration energy-dissipating device is 5 to 8 layers of overlapping insulation frame plates and insulation vibrating plates, one vibrating plate is arranged between each two frame plates, and the frame plate is a porous plate with the thickness of 1 to 5 mm, and holes accounts for 50 to 90 percent of the total area; the frame plates are provided with rectangular frames with the same tops and bottoms as the mandril; and the vibrating plate is a rectangular plate with the same thickness of 0.1 to 0.8 mm as the top and the bottom of the mandril; and the vibration energy-dissipating device is fixed on the top and the bottom of the mandril, and the outside of the vibration energy-dissipating device is a splint of the mandril of a capacitor. The low-noise high-voltage power capacitor unit obviously reduces noise of the mandril of the capacitor, and prevents the spreading of the noise in running; and the sound-absorbing device is positioned in the box shell of the capacitor unit and does not need arranging additionally.

Description

(1) Technical field: [0001] The invention relates to a high-voltage power capacitor, in particular to a low-noise high-voltage power capacitor unit used in a general power system and an ultra-high voltage direct current transmission system. (two) background technology: [0002] In the power system, especially in the EHVDC transmission system, in order to compensate the inductive reactive power of the system and filter out the harmonic components on the AC side of the system, AC filter capacitors are required. In order to filter out the AC component on the DC side of the system, a DC filter capacitor is required. This type of capacitor device is composed of multiple capacitor units, which has the characteristics of large capacity, large floor space and high tower. Inside the casing of the capacitor unit is a core composed of multiple capacitive elements connected in series. During the AC-DC conversion process of the EHVDC power transmission system, a large number of harmoni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G4/002H01G4/35H01G4/38
Inventor 卢有盟左强林唐旺先吴维柏旷冬伟梁琮李东浩冯春林庞美钦刘杰
Owner GUILIN POWER CAPACITOR
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