Control method of vacuum tap changer

Abstract

A control method for a vacuum tapping switch is successively performed through eight steps. After a main moving contact and an auxiliary moving contact are guaranteed to accurately contact static contacts, corresponding vacuum switches are connected then; and before the main moving contact and the auxiliary moving contact are separated from the static contacts, the corresponding vacuum switches are disconnected in advance, a position where an electric arc may occur is moved into a vacuum tube, and a gear shift is completed. The method has a substantial arc-extinguishing effect and prolongs the service life of the tapping switch.

Description

technical field [0001] The invention relates to a control method for a controller of electric equipment, in particular to a control method for a vacuum tap changer used to ensure accurate arc extinguishing of a vacuum tube under load or no-load conditions. Background technique [0002] For ordinary on-load tap-changers, when the gear is switched, it must be ensured that the active contact cannot be cut off when the active contact moves away from the previous gear and moves to the next gear, and the state of electrical conduction must always be maintained. The static contacts of two different gears obviously cannot be conducted with each other, otherwise a short circuit will occur and the meaning of shifting will be lost. In order to solve this problem, the common on-load tap-changer adds a transition contact next to the active contact, and a shift resistor is connected in series on the transition contact. When the active contact leaves the original gear, the transition conta...

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Problems solved by technology

[0008] However, the content described in the claims of the patent, the description and the embodiment structure described in the description do not have any precise control over the opening and closing time of the vacuum tube, and the positional relationship between the active contact and the driven contact. Specifically, when the invention is actually implemented, it is still impossible to accurately ensure that when the moving contact contacts the static contact, the voltage difference between the moving contact and the static contact has been lost, that is, it is impossible to know the operating time and time of the two vacuum tubes. The corresponding relationship between the contact time of the moving contact and the static contact, so this product still cannot accurately complete the arc extinguishing between the moving contact and the static contact, and the implementation effect is not satisfactory, and it cannot reach the requirements described in the patent. good technical effect

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