Movable line protection device

A line protection and mobile technology, applied in the direction of automatic disconnection emergency protection device, emergency protection circuit device, circuit device, etc., can solve the problem of affecting the reliability of power supply, people's normal life, protection can not work normally, and line outage time is long To achieve the effect of increasing power supply reliability, simple installation, and reducing power outage time

Active Publication Date: 2014-07-02
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that when a line protection failure occurs in a substation without bypass wiring, the protection cannot work normally and t

Method used

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  • Movable line protection device
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  • Movable line protection device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Specific implementation mode one, combination Figure 1-Figure 5 To illustrate this specific embodiment, the mobile line protection device described in this specific embodiment includes a box body, a terminal block, a pressure plate, and a protection circuit. One side of the box body is a panel, and the terminal row and pressure plate are both installed on the box body. On the panel, the protection circuit is fixed inside the box. The protection circuit includes a voltage and current circuit, an outlet plate and an operation circuit,

[0032] The operating circuit includes a first trip position relay TWJ1, a second trip position relay TWJ2, a third trip position relay TWJ3, a closing holding relay HBJ, a voltage type anti-trip lockout relay TBJV, a closing contactor HC, and a closing relay HJ , Closing pressure blocking relay HYJ, trip holding relay TBJ, post-closing position relay KKJ, tripping pressure blocking relay TYJ, trip coil TQ, trip indicator LD, closing indicato...

Example Embodiment

[0050] Specific implementation mode two, combination figure 1 This specific embodiment is described. The difference between this specific embodiment and the mobile line protection device described in the first embodiment is that the coil of the first trip position relay TWJ1, the coil of the second trip position relay TWJ2, and the third trip The position relay TWJ3 is connected in parallel with a diode, and the cathode of the diode is connected to the positive bus 1nB01 of the power supply.

Example Embodiment

[0051] Specific implementation mode three, combination figure 1 This specific embodiment is described. The difference between this specific embodiment and the mobile line protection device described in the first embodiment is that the coil of the first closing position relay HWJ1, the coil of the second closing position relay HWJ2, and the second The coils of the three-closing position relay HWJ3 are connected in parallel with a diode, and the cathode of the diode is connected to the positive bus 1nB01 of the power supply.

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Abstract

The invention discloses a movable line protection device and relates to the field of high-tension line protection. The movable line protection device solves the problems that when a line protection failure happens to a transformer substation with no bypass line, the power supply reliability and the normal life of people are affected due the fact that the protection function can not perform normally and line interruption time is long. According to the movable line protection device, a box is made of metal and is closed, the box is firm, durable and small in size, both a current outgoing line and a voltage outgoing line of a terminal strip are flexible lines with contact pins, an opening and closing line is composed of an aviation plug, a protection circuit is fixed in the box, the terminal strip is fixed to the back portion of the box, wiring is conducted on the protection circuit and a base terminal, an alternating current line, an alternating voltage line, a direct current power line, the opening and closing line and the like are then led out of the terminal strip, and thus the movable line protection device is can have the trip-out protection function identical with the fault protection function. The movable line protection device is suitable for protection of high-tension lines.

Description

technical field [0001] The invention relates to the field of high voltage line protection. Background technique [0002] In my country, for high-voltage lines, the line is never allowed to run without protection, and the line protection in the system of 110kV and below in my country is a single set of protection. For substations without bypass wiring, when faults such as line protection occur during operation, the protection cannot When working normally, the protection must be withdrawn, and the protected line must be stopped at the same time, waiting for the protection personnel to deal with it. However, due to the increasing power supply area of ​​various power supply companies, more and more substations under their jurisdiction, and various types of protection Diverse, if each type of protection has a spare set, the cost is very high, which is difficult for many power supply companies. If the protection fails and then contact the manufacturer to send spare parts, it will de...

Claims

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Application Information

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IPC IPC(8): H02H3/05
Inventor 刘柏松王孝亮李言平赵忠颖金志宇刘岩
Owner STATE GRID CORP OF CHINA
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