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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.

Inactive Publication Date: 2014-02-05
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008]The purpose of this invention is to prevent this type of problem from occurring which could lead to major equipment accidents and safety risks

Method used

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

Examples

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Embodiment Construction

[0021] The specific embodiment of the present invention is as figure 2 shown.

[0022] The embodiment of the present invention is realized in this way, with the original main control circuit (see figure 1 ) as the basis, adding a control and protection device with a digital signal processor (DSP) as the core (see figure 2 ). Its method steps are:

[0023] 1. Select the C2000 series digital signal processor, the model is: TMS320F2812, which integrates 16 channels of 12-bit analog / digital converters (ADC), and only 3 channels are used in this embodiment.

[0024] Will CT A ; CT B ; CT C The through-core current transformers are inserted into A, B, and C three-phase power supplies respectively.

[0025] 2. Solder the digital signal processor (DSP), input conditioning circuit, photoelectric isolation solid state relay, sound and light alarm circuit and DC working power supply on the control and protection circuit board after inspection. The input terminal of the input c...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H31/02H02H3/50
Inventor 焉华张宇
Owner STATE GRID CORP OF CHINA
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