CN203455440U - High-voltage single core cable protective layer grounding online monitoring device - Google Patents

High-voltage single core cable protective layer grounding online monitoring device Download PDF

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Publication number
CN203455440U
CN203455440U CN201320422421.4U CN201320422421U CN203455440U CN 203455440 U CN203455440 U CN 203455440U CN 201320422421 U CN201320422421 U CN 201320422421U CN 203455440 U CN203455440 U CN 203455440U
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China
Prior art keywords
temperature sensor
phase
core cable
mutual inductor
phase current
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CN201320422421.4U
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Inventor
任树清
王乐兵
任建利
吕继华
潘长明
闫凤昌
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State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52Outage or fault management, e.g. fault detection or location

Abstract

Provided is a high-voltage single core cable protective layer grounding online monitoring device. The device comprises an A-phase current transformer, a B-phase current transformer, a C-phase current transformer, an A-phase temperature sensor, a B-phase temperature sensor, a C-phase temperature sensor, a data acquisition controller, a GPRS data transmission module and a monitoring device. The high-voltage single core cable protective layer grounding online monitoring device has the following advantages of being safe and reliable. With comparison of a monitoring value and a calculating value of a grounding current, diagnosis to faults of a grounding system is realized, and a theoretical basis and reference data are provided for operation and monitoring of a high-voltage cable so that risk of cable accidents is lowered, safety and reliability of operation of an urban power grid are enhanced, and probability of damage to a cable grounding device is reduced to the minimum value. Besides, the high-voltage single core cable protective layer grounding online monitoring device is high in onsite applicability so that the high-voltage single core cable protective layer grounding online monitoring device is applicable to grounding boxes with different grounding modes, installation positions and types, and thus the high-voltage single core cable protective layer grounding online monitoring device has general applicability, and is convenient to operate and simple in installation. Furthermore, the high-voltage single core cable protective layer grounding online monitoring device is convenient and rapid so that cost of a cable terminal tower grounding system is greatly reduced, a detection period is shortened and manpower and material resources are saved.

Description

A kind of high voltage single-core cable sheath ground connection on-Line Monitor Device
Technical field
The utility model belongs to electric power network detection technique field, particularly relates to a kind of high voltage single-core cable sheath ground connection on-Line Monitor Device.
Background technology
General cross interconnected two sides earth or the single-ended directly grounded method of operation of adopting of metal sheath of 110kV and above single core cable.Metal sheath only has the induced voltage of tens volts over the ground under normal circumstances.When hv cable termination head ground wire, after the destroyed and outer jacket of the cross interconnected ground wire of intermediate connector well loses ground connection completely, to cause outer jacket to puncture or sheath protector burns, more seriously can cause cable major insulation to puncture, likely there is multipoint earthing in metal sheath in this case, form circulation, so both reduced the current-carrying capacity of cable, waste again electric energy and form loss, and it is aging to have accelerated cable insulation, therefore need regularly the ground current of above-mentioned cable metal sheath to be detected, the main method of manual detection that adopts is carried out above-mentioned detection at present.
Through investigation, finding, there is following drawback in manual detection high-tension cable sheath grounding current:
1, the manpower dropping into is large, needs guardian, recorder, tester in the process of test.
2, workload is large, and work required time is long, and round of visits is longer because manpower limits.
3, in test process, have and get an electric shock and the high danger falling, in the process of testing at unlatching grounding box, once grounding box earthed system is destroyed, will produce very large ground current, can make staff get an electric shock, and just more dangerous when testing on tower.
Summary of the invention
In order to address the above problem, the purpose of this utility model is to provide a kind of high voltage single-core cable sheath ground connection on-Line Monitor Device.
In order to achieve the above object, the high voltage single-core cable sheath ground connection on-Line Monitor Device that the utility model provides comprises A phase current mutual inductor, B phase current mutual inductor, C phase current mutual inductor, A phase temperature sensor, B phase temperature sensor, C phase temperature sensor, data acquisition controller, GPRS data transmission module and monitoring equipment; Wherein: A phase current mutual inductor, B phase current mutual inductor and C phase current mutual inductor are arranged on respectively on the sheath ground plane ground wire of A, B, C three-phase single core cable; A phase temperature sensor, B phase temperature sensor, C phase temperature sensor are arranged on respectively on the sheath ground plane ground wire terminal of A, B, C three-phase single core cable;
Data acquisition controller is the data acquisition controller of current transformer and temperature sensor, its three input ends are connected with A phase current mutual inductor, B phase current mutual inductor and C phase current mutual inductor respectively, other three input ends are connected with A phase temperature sensor, B phase temperature sensor and C phase temperature sensor respectively, and output terminal is connected with GPRS data transmission module;
GPRS data transmission module is DTU wireless data transmission unit, and it is connected with monitoring equipment by wireless mode;
Monitoring equipment is user's monitoring device, and it comprises monitoring computer and the mobile phone terminal that is arranged on power system monitor center.
Described data acquisition controller mainly consists of microcontroller, data-carrier store and input Acquisition Circuit.
Described data acquisition controller is furnished with working power, and the model of working power is LXZK-φ 140-100/5.
The model of described A phase current mutual inductor, B phase current mutual inductor and C phase current mutual inductor is LDZC-10-100/5, the model of A phase temperature sensor, B phase temperature sensor and C phase temperature sensor is TYC2000AT, and the model of GPRS data transmission module is GPRS-DTU(WG-1010).
The working power of described high voltage single-core cable sheath ground connection on-Line Monitor Device adopts one of following three kinds of modes: a, storage battery power supply mode; The induction electric energy of b, collection electrical network; C, solar cell for supplying power mode.
The high voltage single-core cable sheath ground connection on-Line Monitor Device that the utility model provides has the following advantages:
(1) safe and reliable
By the comparison of ground current monitor value and calculated value, the diagnosis of the ground system failure that achieves a butt joint, for the operational monitoring of high-tension cable provides theoretical foundation and reference data, to reduce cable fault risk, the safe reliability that improves operation of urban distribution network, drops to minimum by the destroyed probability of cable grounding device.
(2) on-the-spot applicability is strong
Be applicable to the grounding box of different earthing modes, installation site, type, there is general applicability, easy to operate, simple installation.
(3) convenient and swift
Cable termination tower earthed system cost is reduced greatly, shorten sense cycle, save human and material resources.
Accompanying drawing explanation
The high voltage single-core cable sheath ground connection on-Line Monitor Device composition schematic diagram that Fig. 1 provides for the utility model.
Embodiment
High voltage single-core cable sheath ground connection on-Line Monitor Device the utility model being provided below in conjunction with the drawings and specific embodiments is elaborated.
As shown in Figure 1, the high voltage single-core cable sheath ground connection on-Line Monitor Device that the utility model provides comprises: A phase current mutual inductor CTA, B phase current mutual inductor CTB, C phase current mutual inductor CTC, A phase temperature sensor TA, B phase temperature sensor TB, C phase temperature sensor TC, data acquisition controller 1, GPRS data transmission module 2 and monitoring equipment 3; Wherein: A phase current mutual inductor CTA, B phase current mutual inductor CTB and C phase current mutual inductor CTC are arranged on respectively on the sheath ground plane ground wire of A, B, C three-phase single core cable; A phase temperature sensor TA, B phase temperature sensor TB, C phase temperature sensor TC are arranged on respectively on the sheath ground plane ground wire terminal of A, B, C three-phase single core cable;
Data acquisition controller 1 is the data acquisition controller of current transformer and temperature sensor, its three input ends are connected with C phase current mutual inductor CTC with A phase current mutual inductor CTA, B phase current mutual inductor CTB respectively, other three input ends are connected with C phase temperature sensor TC with A phase temperature sensor TA, B phase temperature sensor TB respectively, and output terminal is connected with GPRS data transmission module 2;
GPRS data transmission module 2 is DTU wireless data transmission unit, and it is connected with monitoring equipment 3 by wireless mode;
Monitoring equipment 3 is user's monitoring device, and it comprises monitoring computer and the mobile phone terminal that is arranged on power system monitor center.
Described data acquisition controller 1 mainly consists of microcontroller, data-carrier store and input Acquisition Circuit, and it has the ability that data acquisition, data storage and data operation are processed.
Described data acquisition controller 1 is furnished with working power, and the model of working power is LXZK-φ 140-100/5.
Described A phase current mutual inductor CTA, B phase current mutual inductor CTB and the model of C phase current mutual inductor CTC are LDZC-10-100/5, the model of A phase temperature sensor TA, B phase temperature sensor TB and C phase temperature sensor TC is TYC2000AT, and the model of GPRS data transmission module 2 is GPRS-DTU(WG-1010).
The working power of described high voltage single-core cable sheath ground connection on-Line Monitor Device adopts one of following three kinds of modes: a, storage battery power supply mode; The induction electric energy of b, collection electrical network; C, solar cell for supplying power mode; Wherein comparatively economical and practical with sun power power supply mode.
The high voltage single-core cable sheath ground connection on-Line Monitor Device that the utility model provides is when work, data acquisition controller 1 is by three current transformers and three temperature sensor continuous acquisition and store three current value and temperature values on ground wire, and judge that whether it is normal, if noted abnormalities, by GPRS transport module 2, to the monitoring equipment 3 transmission Realtime Alerts of far-end, upload information immediately; If do not occurred extremely, continue to gather, until arrive after the timing uplink time of regulation, then to monitoring equipment 3 transmissions of far-end, regularly upload information by GPRS transport module 2; Monitoring equipment 3 is often receiving that one is uploaded after information, can postback a response message to transmit leg, and data acquisition controller is controlled 1 and is uploaded after information sending one, must receive take over party's response message, just calculated this time and sent, otherwise continued to send, until receive response message; When the number of times of continuous transmission surpasses setting, there is communication failure in explanation, and now data acquisition controller 1 will stop sending, and enter troubleshooting process; As mentioned above, the high voltage single-core cable sheath ground connection on-Line Monitor Device that the utility model provides has been introduced the information of uploading and has been received the two-way communication mode of replying, and has improved the reliability of communication, the generation of having avoided uploading information dropout phenomenon.
The high voltage single-core cable sheath ground connection on-Line Monitor Device that the utility model provides, utilize current transformer and temperature sensor to carry out Real-time Collection to cable sheath ground current and ground wire temperature, then regularly (time interval can be set arbitrarily) arrives monitoring equipment 3 by the data upload collecting wirelessly.Also there is Realtime Alerts pattern, when the data value collecting surpasses the threshold value of regulation, at once alert data is transferred to monitoring equipment 3 simultaneously.
This device can provide GPRS/CDMA/3G Wireless Data Transmission mode, both can matching with mobile phone terminal use, and also can coordinate software platform to use.
Monitoring computer in monitoring equipment 3, after receiving current acquisition data, is compared the data that collect by software with gross data, check the running status of cable.Reflection directly perceived by numerical value judges ground current situation and the fault type of measuring place cable.
Installing and using in process of this device, we have chosen 110KV high-tension cable sun Zhang one line, and cable cover(ing) material is aluminium sheath, and internal-and external diameter is respectively 107mm, 111mm.And on-the-spot cable data and arranging situation and cable core load have been carried out to field survey, comprise cable segment length, each spaced apart etc.And consider that Practical Project cable laying all adopts cable snake shaped arrangement mode, so the actual segment length of cable need doubly take advantage of 1.05 constant.
On-line monitoring and the contrast of collection in worksite experimental result are as shown in the table:
By contrast, can draw, the result that collection in worksite arrives and on-line monitoring result are roughly close, and in error allowed band, this monitoring device is effectively reliable, and has reduced significantly required manpower and materials.
The high voltage single-core cable sheath ground connection on-Line Monitor Device that the utility model provides has in use obtained significant effect:
1, solved the safety problem in needed artificial, time of the annual sheath grounding current test of carrying out for twice and test process.
2, the most important thing is that in high-tension cable sheath earthed system, losing protective effect (damage, stolen etc.) time can find in time, and send early warning, prevent from that cable major insulation from sustaining damage to cause power outage, play the effect of Real-Time Monitoring.

Claims (4)

1. a high voltage single-core cable sheath ground connection on-Line Monitor Device, is characterized in that: described high voltage single-core cable sheath ground connection on-Line Monitor Device comprises: A phase current mutual inductor CTA, B phase current mutual inductor CTB, C phase current mutual inductor CTC, A phase temperature sensor TA, B phase temperature sensor TB, C phase temperature sensor TC, data acquisition controller (1), GPRS data transmission module (2) and monitoring equipment (3); Wherein: A phase current mutual inductor CTA, B phase current mutual inductor CTB and C phase current mutual inductor CTC are arranged on respectively on the sheath ground plane ground wire of A, B, C three-phase single core cable; A phase temperature sensor TA, B phase temperature sensor TB, C phase temperature sensor TC are arranged on respectively on the sheath ground plane ground wire terminal of A, B, C three-phase single core cable;
Data acquisition controller (1) is the data acquisition controller of current transformer and temperature sensor, its three input ends are connected with C phase current mutual inductor CTC with A phase current mutual inductor CTA, B phase current mutual inductor CTB respectively, other three input ends are connected with C phase temperature sensor TC with A phase temperature sensor TA, B phase temperature sensor TB respectively, and output terminal is connected with GPRS data transmission module (2);
GPRS data transmission module (2) is DTU wireless data transmission unit, and it is connected with monitoring equipment (3) by wireless mode;
Monitoring equipment (3) is user's monitoring device, and it comprises monitoring computer and the mobile phone terminal that is arranged on power system monitor center.
2. high voltage single-core cable sheath ground connection on-Line Monitor Device according to claim 1, is characterized in that: described data acquisition controller (1) mainly consists of microcontroller, data-carrier store and input Acquisition Circuit.
3. high voltage single-core cable sheath ground connection on-Line Monitor Device according to claim 1, is characterized in that: described data acquisition controller (1) is furnished with working power, and the model of working power is LXZK-φ 140-100/5.
4. high voltage single-core cable sheath ground connection on-Line Monitor Device according to claim 1, it is characterized in that: described A phase current mutual inductor CTA, B phase current mutual inductor CTB and the model of C phase current mutual inductor CTC are LDZC-10-100/5, the model of A phase temperature sensor TA, B phase temperature sensor TB and C phase temperature sensor TC is TYC2000AT, and the model of GPRS data transmission module (2) is GPRS-DTU WG-1010.
CN201320422421.4U 2013-07-16 2013-07-16 High-voltage single core cable protective layer grounding online monitoring device Active CN203455440U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103344885A (en) * 2013-07-16 2013-10-09 国家电网公司 High-voltage single-core cable protective covering grounding online monitoring device and control method
CN104678257A (en) * 2015-02-08 2015-06-03 云南酷联科技有限公司 Method for positioning faults of high voltage single-core cable protective layer accurately
CN109031021A (en) * 2018-07-18 2018-12-18 武汉易摩特科技有限公司 A kind of high voltage single-core cable short trouble localization method, apparatus and system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103344885A (en) * 2013-07-16 2013-10-09 国家电网公司 High-voltage single-core cable protective covering grounding online monitoring device and control method
CN104678257A (en) * 2015-02-08 2015-06-03 云南酷联科技有限公司 Method for positioning faults of high voltage single-core cable protective layer accurately
CN104678257B (en) * 2015-02-08 2017-07-11 云南酷联科技有限公司 A kind of pinpoint method of high voltage single-core cable protective layer failure
CN109031021A (en) * 2018-07-18 2018-12-18 武汉易摩特科技有限公司 A kind of high voltage single-core cable short trouble localization method, apparatus and system

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