Low-power-consumption grounding circulating current monitoring device

Abstract

The utility model provides a low-power-consumption grounding circulating current monitoring device. The low-power-consumption grounding circulating current monitoring device comprises a wire end guide column, an equipment end guide groove, a grounding cable, an insulating busbar support, a grounding circulating current device, a fixed steel sheet, host equipment, angle iron, an antenna and a square flange socket. The high-voltage grounding cable circulating current monitoring device has the advantages of being stable and reliable in performance, being capable of effectively monitoring circulating current data of a high-voltage grounding cable, achieving accurate measurement of monitoring signals and reliable transmission of data, and completing detection of cable sheath circulating current. The monitoring device adopts a low-power-consumption working mode, supports long-time working without being affected, can effectively reduce power loss, and supports wired and wireless data uploading functions. The conventional manual regular grounding circulating current patrol is replaced, the labor intensity of field measurement is greatly reduced, and the system maintenance efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to transformer technical field, especially a kind of low-power grounding ring current monitoring device. BACKGROUND

[0002] As an important part of power grid equipment, cable sheath will cause multiple grounding due to chemical pollution, mechanical damage and even rodent damage, which will lead to the rise of metal sheath ground current to a dangerous value, and will directly affect the performance of equipment and power grid operation. Once the grounding system is damaged, the voltage of the metal sheath will change from the normal operating frequency induced voltage to the suspended voltage. Once the suspended voltage on the cable metal sheath rises above the allowable value of the cable outer sheath frequency voltage, it will cause the outer sheath to break down or the sheath protector to burn out, and more seriously, it will cause the cable main insulation to break down and other safety hazards. Currently, the monitoring of cable sheath is mostly manual inspection, with low inspection frequency and efficiency, and cannot timely detect defects. At the same time, the monitoring means is single, only infrared and high frequency projects can be carried out, lacking comprehensive monitoring and judgment of multiple parameters for safe operation of cable, which is easy to cause flashover, fire and other hidden dangers, and brings difficulties and challenges to the operation and maintenance of cable. The operation and management of cable sheath generally adopts manual periodic inspection, and it is difficult to collect ring current data, the personal quality of ring current measurement personnel is required to be high, and there is certain safety hazard. SUMMARY

[0003] Therefore, the utility model aims at providing a low-power grounding ring current monitoring device to solve at least one problem in the prior art.

[0004] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:

[0005] A low-power grounding ring current monitoring device, comprising a line end guide column, a device end guide slot, a grounding cable, an insulating bus support, a grounding ring current device, a fixed steel sheet, a host device, an angle iron, an antenna and a square flange socket, the line end guide column is installed on one side of the host device, the device guide slot is inserted into the line end guide column, the insulating bus support is installed on the grounding cable, the grounding ring current device is installed above the insulating bus support, the grounding ring current device is installed on the grounding cable, the antenna is also installed on one side of the host device, the fixed steel sheet is installed at the bottom of the host device, the fixed steel sheet is installed on the angle iron, the square flange socket is installed on the other side of the host device, and the grounding ring current device is connected with the square flange socket.

[0006] Further, it further comprises a plurality of bolts and nuts, and the insulating bus support is installed on the grounding cable by the bolts and nuts.

[0007] Further, a plurality of grounding ring current device fixing bolts are further included, and the grounding ring current device is installed to the grounding cable through the grounding ring current device fixing bolts.

[0008] Further, a plurality of fixing screws are further included, and the main machine equipment bottom is installed and fixed to the fixed steel sheet through the fixing screws.

[0009] Further, a plurality of main machine fixing bolts are further included, and the fixed steel sheet is installed to the angle iron through the main machine fixing bolts.

[0010] Further, a corrugated pipe is further included, and the butt joint cable of the grounding ring current device is connected with the square flange socket through the corrugated pipe.

[0011] Further, an electrician adhesive tape is further included, and the electrician adhesive tape is wound at both ends of the corrugated pipe.

[0012] Compared with the prior art, the low-power-consumption grounding ring current monitoring device has the following advantages:

[0013] The low-power-consumption grounding ring current monitoring device has the advantages that the performance is stable and reliable, the high-voltage grounding cable ring current data can be effectively monitored, accurate measurement of the monitoring signal and reliable transmission of data are realized, and detection of the cable sheath ring current is completed. The monitoring device adopts a low-power-consumption working mode, supports long-time work without influence, can effectively reduce power loss, and simultaneously supports wired and wireless data uploading functions. The low-power-consumption grounding ring current monitoring device replaces the traditional manual periodic grounding ring current measurement, greatly reduces the labor intensity of field measurement, and improves system maintenance efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings, which form a part of this description, are included to provide a further understanding of the application. The embodiments of the application and its

[0015] Figure 1 The installation preparation schematic view is described in the embodiment of the application;

[0016] Figure 2 The grounding ring current device installation schematic view is described in the embodiment of the application;

[0017] Figure 3 The main machine equipment fixing bolt schematic view is described in the embodiment of the application;

[0018] Figure 4 The main machine equipment fixed angle iron schematic view is described in the embodiment of the application;

[0019] Figure 5 The overall structure schematic view is described in the embodiment of the application.

[0020] Explanation of reference signs:

[0021] 1, line end guide post; 2, equipment end guide groove; 3, grounding cable; 4, bolt and nut; 5, insulating busbar support; 6, circulating device fixing bolt; 7, grounding circulating device; 8, fixing screw; 9, fixing steel sheet; 10, main machine equipment; 11, main machine fixing bolt; 12, angle iron; 13, antenna; 14, square flange socket; 15, electrician tape; 16, corrugated pipe. DETAILED DESCRIPTION

[0022] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0023] In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0024] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0026] As Figures 1 to 5As shown, a low-power ground loop monitoring device, including line end guide column 1, device end guide slot 2, grounding cable 3, bolt and nut 4, insulated busbar support 5, loop device fixing bolt 6, ground loop device 7, fixing screw 8, fixed steel sheet 9, host device 10, host fixing bolt 11, angle iron 12, antenna 13, square flange socket 14, electrician tape 15 and bellows 16, the line end guide column 1 is installed to one side of the host device 10, the line end guide column 1 is inserted with the device guide slot 2, the insulated busbar support 5 is installed to the grounding cable 3 through the bolt and nut 4, the ground loop device 7 is installed above the insulated busbar support 5, the ground loop device 7 is installed to the grounding cable 3 through the loop device fixing bolt 6, the antenna 13 is also installed on one side of the host device 10, the fixed steel sheet 9 is installed at the bottom of the host device 10 through the fixing screw 8, the fixed steel sheet 9 is installed to the angle iron 12 through the host fixing bolt 11, the square flange socket 14 is installed on the other side of the host device 10, the butt joint cable of the ground loop device 7 passes through the bellows 16 and is connected with the square flange socket 14, and the electrician tape 15 is wound around both ends of the bellows 16.

[0027] In this embodiment, the ground loop device is sleeved outside the cable sheath through the clamp type opening and closing interface, and is connected with the intelligent partial discharge device through the connecting line to monitor the current sampling data of the cable sheath. The ground loop monitoring device adopts a contact type and a clamp type opening and closing installation mode. The ground loop monitoring device adopts a material resistant to corrosion and unable to generate eddy current, and the shell protection grade is IP67. The ground loop monitoring device adopts a low-power working mode to meet the long-time working requirement, and can work for up to 5 years. The ground loop monitoring device can effectively monitor the high-voltage grounding cable loop current data, realize the storage, display and analysis of historical data, and effectively identify the defect severity of the ground loop. The ground loop monitoring device supports wired and wireless system upgrade.

[0028] Working principle of a low-power ground loop monitoring device:

[0029] Preparation before device installation: in order to ensure that the wireless communication signal of the device is the strongest, when installing the device, the antenna should be directed towards the data acquisition device (IED). When debugging the device, when inserting the device guide slot 2 into the line end guide column 1 of the device, please make sure that the guide slot and the guide column are aligned, and do not hard insert, otherwise it will damage the device, such as Figure 1 As shown.

[0030] At the same time, the device installed in the substation site exists and the IED distance is different, the large metal equipment exists shielding effect, so it is necessary to know the wireless signal state of each device (during construction and debugging, the background can see continuous wireless communication signal value). After excluding the problem of individual weak signal device, it needs to be adjusted to the nearby grounding cable and grounding steel bar.

[0031] Installation process: as shown in Figure 2 The insulation bus support 5 (supporting role) is fixed to the grounding cable 3 or grounding steel by bolts and nuts 4. The circulating device fixing bolt 6 of the grounding circulating device 7 is removed, the grounding circulating device 7 is placed on the insulation bus support 5, and the circulating device fixing bolt 6 is locked. Another row of insulation bus support 5 is fixed to the grounding cable 3 or grounding steel by bolts and nuts 4.

[0032] As shown in Figure 3 The fixing steel sheet 9 is locked to the main machine device 10 by the fixing screw 8. The fixed main machine device 10 is placed on the angle iron 12, and the direction of the antenna 13 is upward.

[0033] As shown in Figure 4 And Figure 5 According to the actual installation requirement of the site, the length of the corrugated pipe 16 is cut (the corrugated length is generally longer than 30mm of the butt joint cable), the corrugated pipe 16 is sleeved into the butt joint cable of the grounding circulating device 7, and the butt joint cable is inserted into the square flange socket 14 of the main machine device 10. Both ends are wrapped with electrician tape 15, and the installation work is completed.

[0034] The grounding circulating monitoring device has stable and reliable performance, can effectively monitor the high-voltage grounding cable circulating data, realize accurate measurement of the monitoring signal and reliable transmission of the data, and complete the detection of the cable sheath circulating. The monitoring device adopts a low-power working mode, supports long-time work without influence, can effectively reduce power loss, and supports wired and wireless data uploading functions. Replacing the traditional manual periodic grounding circulating measurement can greatly reduce the labor intensity of field measurement and improve the system maintenance efficiency.

[0035] The above only describes the preferred embodiment of the present application, and does not limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A low power ground loop monitoring device, characterized by: It includes wire end guide column (1), equipment end guide slot (2), ground cable (3), insulating bus support (5), ground ring current device (7), fixed steel sheet (9), main equipment (10), angle iron (12), antenna (13) and square flange socket (14), the wire end guide column (1) is installed to one side of the main equipment (10), the wire end guide column (1) is inserted with equipment guide slot, the insulating bus support (5) is installed to the ground cable (3), the ground ring current device (7) is installed above the insulating bus support (5), the ground ring current device (7) is installed to the ground cable (3), the main equipment (10) one side is also provided with antenna (13), the main equipment (10) bottom is installed fixed steel sheet (9), the fixed steel sheet (9) bottom is installed to angle iron (12), the main equipment (10) other side is installed square flange socket (14), the butt joint cable of ground ring current device (7) is connected with square flange socket (14).

2. The low power ground loop current monitoring device of claim 1, wherein: It also includes several bolts and nuts (4), the insulating bus support (5) is installed to the ground cable (3) through the bolt and nut (4).

3. The low power ground loop current monitoring device of claim 1, wherein: It also includes several ring current device fixing bolts (6), the ground ring current device (7) is installed to the ground cable (3) through the ring current device fixing bolt (6).

4. The low power ground loop current monitoring device of claim 1, wherein: It also includes several fixed screws (8), the main equipment (10) bottom is installed fixed steel sheet (9) through fixed screw (8).

5. The low power ground loop current monitoring device of claim 1, wherein: It also includes several main machine fixing bolts (11), the fixed steel sheet (9) is installed to angle iron (12) through main machine fixing bolt (11).

6. The low power ground loop current monitoring device of claim 1, wherein: It also includes corrugated pipe (16), the butt joint cable of ground ring current device (7) is connected with square flange socket (14) through corrugated pipe (16).

7. A low power consumption ground loop monitoring device according to claim 6, wherein: It also includes electrician tape (15), both ends of corrugated pipe (16) are wrapped with electrician tape (15).

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