Method for preventing high-voltage power-driven disconnecting switch supporting insulator from being fractured

A technology of pillar insulators and isolating switches, which is applied in the direction of automatic disconnection emergency protection devices, air switch parts, electrical components, etc., to avoid personal casualties, overcome action lag, and ensure safe production and work.
CN103560036AInactive Publication Date: 2014-02-05STATE GRID CORP OF CHINA +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
STATE GRID CORP OF CHINA
Publication Date
2014-02-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for preventing a high-voltage power-driven disconnecting switch supporting insulator from being fractured. The method comprises the steps that a cored current transformer is used for sampling a current produced when a disconnecting switch drive motor operates, and a disconnecting switch drive motor control device composed of a high-speed digital signal processor is selected to detect, analyze and compare the operating current waveform characteristics of the disconnecting switch drive motor to judge whether a locked-rotor current occurs or not; the control device controls the operation and the non-operation of the disconnecting switch drive motor at a high speed, the stress of the supporting insulator is prevented from continuing to be enlarged, and the operation is carried out continuously after the reason is checked and removed. The occurrence that the high-voltage power-driven disconnecting switch supporting insulator is fractured due to abnormal stress is avoided. After a DSP control protective device is added into a high-voltage disconnecting switch power-driven operation loop , the defect of the lagging operation of a thermal overload relay is overcome, and the fracture accident of the supporting insulator in the process of running or operating can be effectively prevented. The method is suitable for being used in high-voltage primary equipment of a transformer substation.
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Description

[0001] technical field

[0002] The invention relates to a method for preventing a pillar insulator of a high-voltage electric isolating switch from breaking, and belongs to the technical field of high-voltage power transmission and transformation equipment. Background technique

[0003] In order to control the closing and opening of the high-voltage electric isolating switch, the driving motor is used, and the driving motor acts on the moving parts of the isolating switch through the torque of the rotating post insulator through the gear reduction mechanism. When the motor is driven for a period of time, it can ensure that the moving parts of the isolating switch are displaced, making the isolating switch close and open. In order to ensure the safety of high-voltage equipment during maintenance, an isolating switch is used to form an obvious disconnection interval between the equipment to be overhauled and other live parts, so the isolating switch does not open and close t...

Claims

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