Converter transformer tap switch quick pressure release device and method
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A converter transformer and tap changer technology, which is applied to transformers, variable transformers, transformer/inductor cooling, etc., can solve problems such as converter transformer fire, tap changer damage, small size, etc., to achieve safety improvement, Simple structure and high economical effect
Pending Publication Date: 2021-02-05
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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Problems solved by technology
Due to the small size of the tap changer oil chamber, if the pressure is not released quickly enough, the tap changer oil chamber will be broken, and in severe cases, an explosion will occur, which will not only damage the tap changer, but even cause a fire in the converter transformer
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Embodiment 1
[0041] The invention is a quick release pressure device for a converter transformer tap changer, such as figure 1 as shown, figure 1 It is a structural schematic diagram of the device of the present invention.
[0042] The device of the present invention mainly includes: first oil discharge pipe 1, first three-way oil pipe 2, second oil discharge pipe 3, third oil discharge pipe 4, pressure release valve 5, second three-way oil pipe 6, explosion-proof plate 7, tap changer Oil pipe 8, oil conservator 9, oil guide pipe 10 and tap changer body 11.
[0043] Among them, the first oil discharge pipe 1, the first three-way oil pipe 2, the second oil discharge pipe 3, the third oil discharge pipe 4, the pressure relief valve 5, the second three-way oil pipe 6, the explosion-proof plate 7, the tap changer oil pipe 8, the storage The oil tank 9, the oil guide pipe 10 and the tap changer body 11 are all commercially available products.
[0044] Wherein, the response speed of the explo...
Embodiment 2
[0050] The present invention provides another embodiment, a method for quickly releasing pressure of a converter transformer tap changer, which includes the following three situations during specific implementation:
[0051] Situation 1: The explosion-proof disk 7 acts, but the pressure relief valve 5 does not act.
[0052] Situation 2: The explosion-proof disk 7 does not act, but the pressure relief valve 5 acts.
[0053] Situation 3: The explosion-proof disk 7 acts first, and the pressure relief valve 5 acts later.
[0054] Situation 1: the explosion-proof disc 7 acts, but the pressure relief valve 5 does not act, specifically including the following steps:
[0055] Step 1: When an interstage short circuit occurs in the tap changer body 11, an arc of huge energy will be generated in the tap changer body 11, which will vaporize the insulating oil and tap, causing the pressure in the tap changer body 11 to rise rapidly;
[0056] Step 2: When the pressure reaches the action v...
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Abstract
The invention belongs to the technical field of disaster prevention and reduction of power transformation equipment, and particularly relates to a converter transformer tap switch quick pressure release device and method. An oil conservator is connected with a tap switch body through an oil conduit; a tap switch oil pipe on the tap switch body is connected with the first end of a second three-wayoil pipe, the second end of the second three-way oil pipe is connected with a pressure release valve, and the other end of the pressure release valve is connected with a first oil discharge pipe; thethird end of the second three-way oil pipe is connected with the third oil discharge pipe, and the explosion-proof sheet is connected therebetween; the first end of the first three-way oil pipe is connected with a second oil discharge pipe; the other end of the second oil discharge pipe extends into a converter transformer oil pool; and the second end of the first three-way oil pipe is connected with the other end of the first oil discharge pipe; the third end of the first three-way oil pipe is connected with the third oil discharge pipe. The converter transformer tap switch quick pressure release device is simple in structure and high in economy and safety, and when the tapping switch is subjected to interstage short circuit, the pressure of the oil chamber of the tapping switch can be quickly released, combustible insulating oil is isolated, and the accident rate is reduced.
Description
technical field [0001] The invention belongs to the technical field of disaster prevention and reduction for power transformation equipment, and in particular relates to a device and method for quickly releasing pressure of a tap changer of a converter transformer. Background technique [0002] The converter transformer adjusts the voltage change of the grid side through the voltage regulation of the tap changer, so as to meet the requirements of the valve side voltage. When an interstage short circuit occurs during tap changer voltage regulation, the instantaneous value of the short circuit current can reach hundreds of kiloamperes. The short-circuit current will generate a high-energy arc, which will heat and decompose the insulating oil. A huge amount of gas will be generated in a very short time, and a huge dynamic pressure will be generated in the oil chamber of the tap changer. The dynamic pressure amplitude is high and the transmission speed is fast. Due to the smal...
Claims
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Application Information
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