CN205210162U - High tension cable sheath earth current on -line monitoring system - Google Patents
High tension cable sheath earth current on -line monitoring system Download PDFInfo
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- CN205210162U CN205210162U CN201520921377.0U CN201520921377U CN205210162U CN 205210162 U CN205210162 U CN 205210162U CN 201520921377 U CN201520921377 U CN 201520921377U CN 205210162 U CN205210162 U CN 205210162U
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Abstract
The utility model discloses a high tension cable sheath earth current on -line monitoring system, include: a monitor terminal, wherein, this monitor terminal includes: for gathering cable earth current signal a current transformer who links to each other with A looks cable fixed terminal, the 2nd current transformer who links to each other with B looks cable fixed terminal, the 3rd current transformer who links to each other with C looks cable fixed terminal, three current transformer's secondary side and earth current gather the host computer and are connected, and earth current gathers the host computer and is connected with GPRS DTU module electricity, be used for receiving the server through GPRS DTU module current signal, be provided with wireless communication module on the server, be used for receiving wireless communication module transmitting data's monitor terminal, monitor terminal includes memory, printer, display, comparator, a power for being monitor terminal provides the electric energy, the power is solar power system, and solar power system's output terminal is connected with monitor terminal's power supply terminal electricity.
Description
Technical field
The utility model relates to high-voltage cross-linking polythene cable grounding current monitoring equipment technical field, particularly relates to a kind of high-tension cable sheath grounding current on-line monitoring system.
Background technology
As everyone knows, under normal circumstances, because there is certain induced potential with cable core interlinkage in cable metal sheath, under accident and internal system superpotential or Lightning Over-voltage situation, induced potential is particularly serious.Therefore, the necessary proper grounding of cable metal sheath, utilizes the earth to be limited in by cable metal sheath and allows on earthing potential.More than 66KV power cable mostly is single core cable, if three-phase interconnected rear direct ground connection in protective metal shell two ends during laying, then when core is by electric current, due to the electromagnetic induction of conductor current, the induced voltage that protective metal shell produces can cause protective metal shell occurring induction circulation.These induction currents are monitored, will have very important significance to the working state monitoring of whole high-tension cable, therefore, design and develop a kind of on-line monitoring system can monitored high-tension cable sheath grounding current and seem it is particularly important.
Utility model content
The technical problems to be solved in the utility model is: provide a kind of high-tension cable sheath grounding current on-line monitoring system.This high-tension cable sheath grounding current on-line monitoring system can be monitored or periodic monitor high voltage single-core cable ground current effectively in real time, record stores ground current historical data, improves functional reliability and the security of the high-voltage fence of 110kV-500kV electric pressure.Operational monitoring for high-tension cable provides theoretical foundation and reference data, to reduce cable system accident risk.
The technical scheme that the utility model is taked for the technical matters existed in solution known technology is:
A kind of high-tension cable sheath grounding current on-line monitoring system, at least comprises:
For gathering the monitoring terminal of cable grounding current signal, wherein, this monitoring terminal comprises: the first current transformer be connected with A phase cable fixed terminal; The second current transformer be connected with B phase cable fixed terminal, the 3rd current transformer be connected with C phase cable fixed terminal; Secondary side and the ground current of three current transformers gather main frame and are connected, and this ground current gathers main frame and is electrically connected with GPRSDTU module;
For receiving the server by GPRSDTU blocks current signal, this server is provided with wireless communication module;
For receiving the monitor terminal of radio communication mold Bulk transport data, this monitor terminal comprises storer, printer, display, comparer;
For providing the power supply of electric energy for monitoring terminal, described power supply is device of solar generating, and the lead-out terminal of this device of solar generating is electrically connected with the power supply terminal of monitoring terminal.
Further: the power supply terminal of above-mentioned monitoring terminal is also connected with A phase high-tension cable.
Further: the cable current that above-mentioned first current transformer, the second current transformer, the 3rd current transformer gather all is not more than 100A.
Further: the timer for controlling three current transformer time openings or cut out is also installed on above-mentioned monitoring terminal.
The advantage that the utility model has and good effect are:
By adopting technique scheme, the utility model can in real time or the current parameters of the above high-tension cable metallic shield grounding point of periodic monitor 35KV, can realize accurately measuring 0-100A ground current and regularly patrolling and examining measurement, replace the regular ground current of Traditional Man mode and patrol survey, greatly alleviate the labour intensity of in-site measurement, improve system maintenance efficiency.Reflect the situation such as sheath ground connection good degree, cable degree of aging, the change of core payload simultaneously; Under Voltage Cable Lines Construction normal operation, when ground current value produce sudden change reduce or be zero time, in conjunction with power supply administration's power scheduling situation and cable running state analysis diagnostic model, effectively judge that the stolen or ground wire of grounding box is cut.
Accompanying drawing illustrates:
Fig. 1 is the circuit block diagram of the utility model preferred embodiment.
Embodiment
For utility model content of the present utility model, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1, a kind of high-tension cable sheath grounding current on-line monitoring system, comprising:
(1) for gathering the monitoring terminal of high-tension cable sheath grounding current.Wherein, the current transformer be connected with A phase cable fixed terminal is for gathering A phase cable grounding electric current, the current transformer be connected with B phase cable fixed terminal is for gathering B phase cable grounding electric current, and the current transformer be connected with C phase cable fixed terminal is for gathering C phase cable grounding electric current; Monitoring terminal being provided with the GPRSDTU module for transmitting collection signal, Current Transformer Secondary side and ground current being gathered main frame and is connected, carry out the transmission of current signal data by GPRSDTU module.
(2) for receiving the server of the current signal transmitted by GPRSDTU module acquires.Meanwhile, server by Wireless Data Transmission modes such as GPRS/CDMA/3G to mobile phone terminal transmitting data information.
(3) for the monitor terminal of storage of collected data, display data, this monitor terminal comprises storer, printer, display, comparer; The Real-Time Monitoring collection storage, query statistic, data-printing etc. of data can be realized.Monitor terminal is connected with server by ethernet line, can by comparer by the data of collection compared with gross data, check the running status of cable, judge by the reflection directly perceived of numerical value ground current situation and the fault type of measuring place cable.
(4) power supply for powering for monitoring terminal, described power supply is device of solar generating, and the lead-out terminal of this device of solar generating is electrically connected with the power supply terminal of monitoring terminal.
Principle of work of the present utility model is: three current transformers gather three-phase high-voltage cable sheath grounding current respectively, so by the current signal that collects by GPRSDTU module transfer to server; The current signal received is sent to mobile phone terminal or monitor terminal by wireless transmission method by server subsequently; At monitor terminal, staff can real time and on line monitoring cable current, grasps data in time, and ensure that the normal safe of high-tension cable runs, meanwhile, monitor terminal is also preserved historical data, for subsequent analysis problem provides valuable data.
On the basis of above preferred embodiment: the power supply terminal of above-mentioned monitoring terminal is also electrically connected with A phase high-tension cable; Like this when the electric energy of device of solar generating is not enough to support monitoring terminal work, then monitoring terminal in time from the power taking on the spot of A phase high-tension cable, and then can ensure the normal work of monitoring terminal.
In order to meet monitoring accuracy requirement: the above-mentioned A of belonging to, the cable current that the current transformer of B, C three-phase gathers all are not more than 100A.
Dangerous accident is there is: the timer for controlling three current transformer time openings or cut out is also installed on described monitoring terminal in order to prevent monitoring device continuous firing.Timer is preferably three, namely on each current transformer, installs a timer; Such current transformer can realize start by set date and cut out, i.e. step mode of operation, can ensure the precision of monitoring like this, can extend the serviceable life of current transformer simultaneously.
Above embodiment of the present utility model has been described in detail, but described content being only preferred embodiment of the present utility model, can not being considered to for limiting practical range of the present utility model.All equalizations done according to the utility model application range change and improve, and all should still belong within patent covering scope of the present utility model.
Claims (4)
1. a high-tension cable sheath grounding current on-line monitoring system, is characterized in that: at least comprise:
For gathering the monitoring terminal of cable grounding current signal, wherein, this monitoring terminal comprises: the first current transformer be connected with A phase cable fixed terminal; The second current transformer be connected with B phase cable fixed terminal, the 3rd current transformer be connected with C phase cable fixed terminal; Secondary side and the ground current of three current transformers gather main frame and are connected, and this ground current gathers main frame and is electrically connected with GPRSDTU module;
For receiving the server by GPRSDTU blocks current signal, this server is provided with wireless communication module;
For receiving the monitor terminal of radio communication mold Bulk transport data, this monitor terminal comprises storer, printer, display, comparer;
For providing the power supply of electric energy for monitoring terminal, described power supply is device of solar generating, and the lead-out terminal of this device of solar generating is electrically connected with the power supply terminal of monitoring terminal.
2. high-tension cable sheath grounding current on-line monitoring system according to claim 1, is characterized in that: the power supply terminal of above-mentioned monitoring terminal is also connected with A phase high-tension cable.
3. high-tension cable sheath grounding current on-line monitoring system according to claim 2, is characterized in that: the cable current that above-mentioned first current transformer, the second current transformer, the 3rd current transformer gather all is not more than 100A.
4. high-tension cable sheath grounding current on-line monitoring system according to claim 3, is characterized in that: on above-mentioned monitoring terminal, be also provided with the timer for controlling three current transformer time openings or closedown.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520921377.0U CN205210162U (en) | 2015-11-18 | 2015-11-18 | High tension cable sheath earth current on -line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520921377.0U CN205210162U (en) | 2015-11-18 | 2015-11-18 | High tension cable sheath earth current on -line monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205210162U true CN205210162U (en) | 2016-05-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520921377.0U Expired - Fee Related CN205210162U (en) | 2015-11-18 | 2015-11-18 | High tension cable sheath earth current on -line monitoring system |
Country Status (1)
| Country | Link |
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| CN (1) | CN205210162U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202608A (en) * | 2017-05-18 | 2017-09-26 | 国网天津市电力公司 | Electrical cable intelligent grounding box detecting system |
| CN110501550A (en) * | 2019-08-23 | 2019-11-26 | 国网河北省电力有限公司 | A kind of system and method detecting electric current |
-
2015
- 2015-11-18 CN CN201520921377.0U patent/CN205210162U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202608A (en) * | 2017-05-18 | 2017-09-26 | 国网天津市电力公司 | Electrical cable intelligent grounding box detecting system |
| CN110501550A (en) * | 2019-08-23 | 2019-11-26 | 国网河北省电力有限公司 | A kind of system and method detecting electric current |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160504 Termination date: 20161118 |
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| CF01 | Termination of patent right due to non-payment of annual fee |