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Online monitoring device for transformer substation secondary equipotential ground network

A monitoring device and equipotential technology, which is applied to electric alarms, instruments, anti-theft alarms, etc., can solve the problems of backward anti-theft measures of the ground network, and achieve the effects of simple structure, simplified monitoring process, and easy deployment

Inactive Publication Date: 2019-03-29
SICHUAN POWER EHV OVERHAUL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of backward anti-theft measures of the existing ground network, the present invention provides an online monitoring device for the secondary equipotential ground network of a substation, which solves the anti-theft monitoring of the ground network, and the installation of the device will not affect the secondary equipotential ground network safety

Method used

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  • Online monitoring device for transformer substation secondary equipotential ground network
  • Online monitoring device for transformer substation secondary equipotential ground network

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Such as figure 1 As shown, a substation secondary equipotential ground network online monitoring device includes a terminal box, a monitoring system and a ground network 2. The terminal box is provided with a voltage relay, a switching power supply, a buzzer, and a measurement and control device. The measurement and control device is connected with the monitoring system; the switching power supply supplies power to the voltage relay 1 and the buzzer, and the voltage relay includes a normally closed contact K1, a normally closed contact K2 and an excitation coil KV, and the normally closed contact K1 is connected to the In the power supply circuit of the measurement and control device, the normally closed contact K2 is connected in the power supply circuit of the buzzer; when the excitation coil KV is energized and excited, the normally closed contact K1 and the normally closed contact K2 are both opened, and the The normally closed contact K1 and the normally closed con...

Embodiment 2

[0031] This monitoring device has been installed in a 500kV substation in Sichuan and has been successfully tested on site. In order to ensure full coverage of the monitoring range, the monitoring device is installed at a reasonable monitoring density in the terminal box along the cable trench. The protection range of each device should not exceed 50 meters to ensure There is no dead angle in the monitoring range, real-time monitoring of the integrity of the secondary equipotential ground network of the substation, the effect is obvious, the reliability is high, and the system construction cost is low, and the existing integrated automation system of the substation can be fully used for monitoring. Once the ground network is stolen, it will Timely alarm and activate the buzzer so that the operating personnel (security guard) can deal with it in time, minimize the loss, and have obvious economic benefits. This is of great significance to the safety of the ground network of unatt...

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Abstract

The invention discloses an online monitoring device for a transformer substation secondary equipotential ground network. The device comprises a terminal box, a monitoring system and a ground network.The terminal box is internally provided with a voltage relay, a switching mode power supply and a buzzer. The device further comprises a measuring and controlling device which is connected with the monitoring system. The switching mode power supply supplies power to the voltage relay and the buzzer. The voltage relay comprises a normally closed contact K1, a normally closed contact K2 and an exciting coil KV. The normally closed contact K1 is connected with the power supply loop of the measuring and controlling device. The normally closed contact K2 is connected with the power supply loop of the buzzer. When the exciting coil KV is in energization excitation, the normally closed contact K1 and the normally closed contact K2 are open. When the exciting coil KV is in power-off excitation loss, the normally closed contact K1 and the normally closed contact K2 are closed. One end of the power interface of the exciting coil KV is connected with the anode of the switching mode power supply,and the other end is connected with the ground network.

Description

technical field [0001] The invention relates to on-line monitoring of a secondary equipotential ground network, in particular to an on-line monitoring device for a secondary equipotential ground network of a substation. Background technique [0002] As an important part of the substation, the secondary equipotential grounding grid of the substation is of great significance to the anti-electromagnetic interference and lightning protection of the secondary circuit of the whole station, the correct operation of the relay protection equipment and the protection of personal equipment safety. The secondary equipotential grounding network is laid by copper cables along the cable trench of the whole station, but it is basically a blind spot in the daily inspection and maintenance. Copper itself is expensive as a non-ferrous metal and is easily stolen by criminals. The theft of the equipotential grounding ground grid is not easy to be found after being stolen. There is no abnormal in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B13/24
CPCG08B13/2497
Inventor 杨周薛巍张文胜张文瑜伍苗雷雨田郑秀谢斌李硕钟超
Owner SICHUAN POWER EHV OVERHAUL
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