CN203881891U - Transformer grounding downlead conduction state inspection device - Google Patents

Abstract

The utility model discloses a transformer grounding downlead conduction state inspection device. The inspection device comprises data collection fixing ends disposed on grounding downleads of adjacent equipment, and a hand-held data collection mobile terminal, wherein the data collection fixing ends are in 2.4G wireless communication with the data collection mobile terminal. Detection professionals detect the transformer grounding downlead conduction state in a transformer site through the above detection manner and the device, so as to complete a transformer grounding downlead conduction state inspection operation. The transformer grounding downlead conduction state inspection device helps to improve speed and efficiency of the transformer grounding downlead conduction state inspection operation, to reduce workload of the inspection personnel. The transformer grounding downlead conduction state inspection device is convenient in usage, and the 2.4 GHz frequency band wireless communication device is low in price. Thus, the transformer grounding downlead conduction state inspection device is particularly suitable for regular inspection of transformer grounding downlead conduction states of electrical network enterprises.

Description

An inspection device for the conduction state of the grounding down conductor of substation equipment

technical field

The utility model belongs to the field of electrician measurement and is used for the inspection work of the conduction state of the grounding down conductor of the substation equipment in operation.

Background technique

The conduction state of the grounding down-conductor of the substation equipment and the grounding grid is very important. If the conduction resistance exceeds the standard, it will directly affect the safe operation of the equipment. Lost ground running status. The measurement method in Section 5 "Electrical Integrity Test of Grounding Devices" in DL/T475-2006 "Guidelines for Measurement of Characteristic Parameters of Grounding Devices" is to check the connection with the resistance value between the grounding down conductor of adjacent equipment In this case, the attention value is: the good conduction value of the grounding down conductor of the equipment should be below 50mΩ, but since there are many kinds of substation equipment in a substation, each equipment has at least one grounding down conductor and The grounding grid is connected. Generally, a 330KV substation needs to measure about 500 equipment grounding down conductors. The live detection method is used, and portable testing equipment is used for detection. The large number of such equipment brings inconvenience to the detection work, and the detection takes a long time. It is even more difficult to obtain more complete equipment grounding down-conductor operating status data in a timely manner. A device for inspecting the conduction state of the grounding down-conductor of substation equipment. The inspection device is composed of a data collection fixed terminal installed on the grounding down-conductor of adjacent equipment and a hand-held data collection mobile terminal. The data communication adopts the 2.4G wireless communication method. The detection professionals use the above detection methods and equipment on the substation site to check the conduction state of the grounding down conductor of the substation equipment and complete the inspection of the conduction state of the grounding down conductor of the substation equipment. Check work.

Contents of the invention

The utility model discloses a conduction state inspection device for grounding down conductors of substation equipment. The fixed end is composed of a hand-held data collection mobile end. The fixed end of the collection includes the grounding down conductor conduction resistance measurement unit of the adjacent equipment, and the equipment grounding down conductor conduction resistance measurement unit. The adjacent equipment is a group, respectively Installed on the grounding down wire of the substation equipment under test, measure the conduction resistance value of the loop formed by the grounding down wire of the adjacent equipment and the grounding grid, and the data processing unit, the signal input end of the data processing unit is connected to the equipment grounding with a cable The output end of the down conductor conduction resistance measurement unit obtains the conduction resistance value signal of the loop formed by the grounding down conductor of the adjacent equipment and the grounding grid, the data processing unit converts the analog quantity into the digital quantity, and connects the digital signal output terminal The data transmission unit of the wireless communication network in the 2.4GHz frequency band is used to upload data, and the data acquisition mobile terminal includes a data receiving unit based on the wireless communication network in the 2.4GHz frequency band, a data processing unit, a data recording unit and a display unit, and a data receiving unit. The signal output end is connected to the input end of the data processing unit, and the output end of the data processing unit is respectively connected to the data recording unit and the data display unit. The card device, the collection fixed terminal and the data collection mobile terminal are connected through a wireless communication network in the 2.4GHz frequency band.

The utility model helps to improve the speed and efficiency of the real-time detection work of the conduction state of the grounding down conductor of the substation equipment, reduces the workload of the inspection personnel, is convenient to use, and has a low price of wireless communication equipment in the 2.4GHz frequency band, and is especially suitable for power grids The enterprise conducts regular inspections on the conduction status of the grounding down conductor of the substation equipment.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model;

Below in conjunction with accompanying drawing 1 the content of the present utility model is described in further detail.

Accompanying drawing 1: is the block diagram of connection structure of the present utility model. It is composed of a fixed terminal (1) for collecting conduction resistance value data installed in the loop formed by the grounding down conductor and the grounding grid of each group of adjacent equipment, and a mobile terminal (2) for manual hand-held data collection.

Detailed ways

In attached drawing 1, the acquisition fixed terminal (1) includes the grounding downconductor conduction resistance measurement unit of the adjacent equipment, and the equipment grounding downconductor conduction resistance measurement unit is grouped according to the adjacent equipment and installed in the measured The grounding down wire of the substation equipment is used to measure the conduction resistance value of the loop formed by the grounding down wire of the adjacent equipment and the grounding grid, and the data processing unit. The signal input end of the data processing unit is connected to the grounding down wire of the equipment with a cable. The output terminal of the on-resistance measurement unit obtains the on-resistance value signal of the loop composed of the grounding down conductor and the grounding grid of the adjacent equipment. The data processing unit converts the analog quantity to the digital quantity, and connects the digital signal output terminal to the 2.4GHz frequency band The data transmission unit of the wireless communication network is used for uploading data, and the data acquisition mobile terminal (2) includes a data receiving unit, a data processing unit, a data recording unit and a display unit based on a 2.4GHz frequency band wireless communication network, and a signal of the data receiving unit The output end is connected to the input end of the data processing unit, and the output end of the data processing unit is respectively connected to the data recording unit and the data display unit. The data processing unit is an industrial microcontroller, the display unit is a liquid crystal display, and the data recording unit is a memory card reader. The device, the collection fixed terminal (1) and the data collection mobile terminal (2) are connected through a wireless communication network in the 2.4GHz frequency band.

Claims (1)

1. the utility model discloses a kind of converting equipment down conductor conducting state inspection device, it is characterized in that: this device is by the collection stiff end (1) that is arranged on neighbouring device down conductor and grounded screen and forms the conducting resistance Value Data in loop, form with artificial hand-held data acquisition mobile terminal (2), gather stiff end (1) and comprise neighbouring device down conductor conducting resistance measuring unit, equipment ground downlead conducting resistance measuring unit, by neighbouring device, it is one group, be arranged on respectively on tested converting equipment down conductor, measure the conduction resistance value that neighbouring device down conductor and grounded screen form loop, and data processing unit, the signal input part of data processing unit is connecting equipment ground downlead conducting resistance measuring unit output terminal with cable, obtain the conducting resistance value signal that neighbouring device down conductor and grounded screen form loop, data processing unit is changed by analog quantity and digital quantity, and digital signal output end is connected to the data transmission unit of the wireless communication networks based on 2.4GHz frequency range, for uploading data, data acquisition mobile terminal (2) comprises the data receiver unit of the wireless communication networks based on 2.4GHz frequency range, data processing unit, data record unit and display unit, the input end of the signal output part connection data processing unit of data receiver unit, the output terminal of data processing unit is connecting respectively data record unit and data display unit, data processing unit is industrial single-chip microcomputer, display unit is a LCDs, data record unit is memory card reader, gathering the wireless communication networks by 2.4GHz frequency range between stiff end (1) and data acquisition mobile terminal (2) is connected.