A high-voltage direct current fast closing switch and its switch fracture structure
A closing switch, high-voltage DC technology, applied in the direction of air switch parts, etc., can solve the problem of not being able to meet the fast closing switch of DC transmission projects, and achieve the effect of simple structure, small quality, and improved insulation margin.
Active Publication Date: 2016-08-17
STATE GRID CORP OF CHINA +3
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Problems solved by technology
The ±800kV UHV DC transmission project requires the rated current capacity of the fast closing switch to reach 5300A, while the ±1100kV DC transmission project requires its rated current capacity to be 5500A. At present, there is no fast closing switch that can meet the requirements of the ±1100kV DC transmission project. switch
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[0024] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0025] Embodiment of the medium and high voltage direct current fast closing switch of the present invention:
[0026] Such as Figure 1 to Figure 4 As shown, a high-voltage DC fast closing switch includes a mechanism box 1, a porcelain sleeve 2, an upper terminal block 3 and a lower terminal base 4, the upper terminal base 3 is fixed on the top of the porcelain sleeve 2 with bolts, and the lower terminal base 4 is used for Bolts are fixedly installed under the porcelain sleeve 2, a spring operating mechanism is installed in the mechanism box 1, and a switch fracture is installed in the porcelain sleeve 2. The switch fracture includes a static end assembly and a moving end assembly arranged up and down along the axis of the porcelain bushing. The static end assembly consists of a hollow cylindrical static support 5 inte...
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The invention discloses a high-voltage direct current fast closing switch and its switch fracture structure. The switch fracture structure includes a static end assembly and a moving end assembly which are arranged up and down oppositely. The static contact finger installed at the lower end of the static support is composed of a movable support with a main body in a cylindrical structure and a movable contact that is electrically conductive and slidably assembled on the upper end of the movable support in the axial direction. The movable contact has two ends The opening and the cross-section of the cylindrical structure are circular. The upper section of the cylinder is a contact conductive section that is in contact with the static contact finger, and the lower section is a sliding conductive section that cooperates with the guiding movement of the movable support. The interior of the cylinder is designed There are connection plates for fixed connection of insulating tie rods. The contact resistance of the switch fracture of the present invention is small, the temperature rise resistance is strong, the flow capacity is high, and the moving part is only the moving contact. quick.
Description
technical field [0001] The invention belongs to the field of high-voltage direct current switches, and specifically relates to a high-voltage direct current fast closing switch suitable for a high-voltage direct current transfer switch (NBGS), and also relates to a switch fracture structure adopted by the high-voltage direct current fast closing switch. Background technique [0002] The HVDC transfer switch is one of the key equipment in the HVDC transmission system. It is mainly used for the conversion of various operating modes and grounding systems in the HVDC transmission system, and plays an important role in ensuring the safe and stable operation of the HVDC transmission system. NBGS is a kind of high-voltage DC transfer switch, which is called the neutral bus grounding switch. It is installed between the neutral line and the grounding network of the converter station. Closing switch. During normal operation, the fast closing switch is in the off position, while the D...
Claims
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IPC IPC(8): H01H31/02
Inventor 马志华程铁汉孙珂珂门博
Owner STATE GRID CORP OF CHINA