CN203396822U - On-line monitoring device for grounding currents flowing through sheaths of high-voltage single-core cables - Google Patents

On-line monitoring device for grounding currents flowing through sheaths of high-voltage single-core cables Download PDF

Info

Publication number
CN203396822U
CN203396822U CN201320422411.0U CN201320422411U CN203396822U CN 203396822 U CN203396822 U CN 203396822U CN 201320422411 U CN201320422411 U CN 201320422411U CN 203396822 U CN203396822 U CN 203396822U
Authority
CN
China
Prior art keywords
phase current
mutual inductor
current
voltage
phase
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201320422411.0U
Other languages
Chinese (zh)
Inventor
任树清
王乐兵
任建利
吕继华
潘长明
闫凤昌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, State Grid Tianjin Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201320422411.0U priority Critical patent/CN203396822U/en
Application granted granted Critical
Publication of CN203396822U publication Critical patent/CN203396822U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

Disclosed is an on-line monitoring device for grounding currents flowing through sheaths of high-voltage single-core cables. The on-line monitoring device comprises an A-phase current transformer, a B-phase current transformer, a C-phase current transformer, a current data collector, a GPRS data transmission module and monitoring equipment. The A-phase current transformer, the B-phase current transformer and the C-phase current transformer are respectively mounted on ground wires of sheath ground layers of A-phase, B-phase and C-phase single-core cables; three input ends of the current data collector are respectively connected with the A-phase current transformer, the B-phase current transformer and the C-phase current transformer, and an output end of the current data collector is connected with the GPRS data transmission module; and the GPRS data transmission module is connected with the monitoring equipment in a wireless manner. The on-line monitoring device for the grounding currents flowing through the sheaths of the high-voltage single-core cables has the advantages of good safety, high reliability, strong on-site applicability, good convenience and high efficiency.

Description

A kind of high voltage single-core cable sheath grounding current 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 grounding current on-Line Monitor Device.
Background technology
In power industry, general cross interconnected two sides earth or the single-ended directly grounded method of operation of adopting of the metal sheath of 110kV and above high voltage 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, will 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 grounding current on-Line Monitor Device.
In order to achieve the above object, the high voltage single-core cable sheath grounding current 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, current data collector, 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;
Current data collector is current sensor data acquisition controller, and its three input ends are connected with A phase current mutual inductor, B phase current mutual inductor and C phase current mutual inductor 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 current data collector mainly consists of microcontroller, data-carrier store and input Acquisition Circuit.
Described current data collector 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, and the model of current data collector is TYLD1, 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 grounding current 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 grounding current 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 composition schematic diagram of the high voltage single-core cable sheath grounding current on-Line Monitor Device that Fig. 1 provides for the utility model.
Embodiment
High voltage single-core cable sheath grounding current 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 grounding current 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, current data collector 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;
Current data collector 1 is current sensor data acquisition controller, and 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, 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 current data collector 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 current data collector 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, and the model of current data collector 1 is TYLD1, 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 grounding current on-Line Monitor Device can adopt three kinds of mode: 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 grounding current on-Line Monitor Device that the utility model provides is when work, current data collector 1 is by three current transformer continuous acquisition and store three current values on ground wire, and judge that whether it is normal, if it is abnormal to find that current current value occurs, by GPRS transport module 2, to the monitoring equipment 3 transmission Realtime Alerts of far-end, upload information immediately; If current value does not occur extremely, continue to gather current value, 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 unit 1 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 current data collector 1 will stop sending, and enter troubleshooting process.As mentioned above, the high voltage single-core cable sheath grounding current 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 grounding current on-Line Monitor Device that the utility model provides, utilize current transformer to carry out Real-time Collection to cable sheath ground current, then regularly (time interval can be set arbitrarily) arrives monitoring equipment 3 by the data upload collecting wirelessly; Also there is Realtime Alerts pattern, detect in real time electric current, when current value 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, monitoring device is effectively reliable, and has reduced significantly required manpower and materials.
The high voltage single-core cable sheath grounding current 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 grounding current on-Line Monitor Device, is characterized in that: described high voltage single-core cable sheath grounding current on-Line Monitor Device comprises: A phase current mutual inductor CTA, B phase current mutual inductor CTB, C phase current mutual inductor CTC, current data collector (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;
Current data collector (1) is current sensor data acquisition controller, 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, 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 grounding current on-Line Monitor Device according to claim 1, is characterized in that: described current data collector (1) mainly consists of microcontroller, data-carrier store and input Acquisition Circuit.
3. high voltage single-core cable sheath grounding current on-Line Monitor Device according to claim 1, is characterized in that: described current data collector (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 grounding current 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 current data collector (1) is TYLD1, and the model of GPRS data transmission module 2 is GPRS-DTU(WG-1010).
CN201320422411.0U 2013-07-16 2013-07-16 On-line monitoring device for grounding currents flowing through sheaths of high-voltage single-core cables Active CN203396822U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320422411.0U CN203396822U (en) 2013-07-16 2013-07-16 On-line monitoring device for grounding currents flowing through sheaths of high-voltage single-core cables

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320422411.0U CN203396822U (en) 2013-07-16 2013-07-16 On-line monitoring device for grounding currents flowing through sheaths of high-voltage single-core cables

Publications (1)

Publication Number Publication Date
CN203396822U true CN203396822U (en) 2014-01-15

Family

ID=49908344

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320422411.0U Active CN203396822U (en) 2013-07-16 2013-07-16 On-line monitoring device for grounding currents flowing through sheaths of high-voltage single-core cables

Country Status (1)

Country Link
CN (1) CN203396822U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103389408A (en) * 2013-07-16 2013-11-13 国家电网公司 High-voltage single-core cable sheath grounding current on-line monitoring device and control method
CN103926449A (en) * 2014-04-24 2014-07-16 江苏省电力公司常州供电公司 Self-adaptive monitoring method for power cable grounding current
CN103941161A (en) * 2014-05-12 2014-07-23 国家电网公司 On-line monitoring system for current and carrying capacity of cable sheath

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103389408A (en) * 2013-07-16 2013-11-13 国家电网公司 High-voltage single-core cable sheath grounding current on-line monitoring device and control method
CN103926449A (en) * 2014-04-24 2014-07-16 江苏省电力公司常州供电公司 Self-adaptive monitoring method for power cable grounding current
CN103926449B (en) * 2014-04-24 2016-11-02 江苏省电力公司常州供电公司 The self-adaptive monitoring method of power cable earth current
CN103941161A (en) * 2014-05-12 2014-07-23 国家电网公司 On-line monitoring system for current and carrying capacity of cable sheath

Similar Documents

Publication Publication Date Title
CN103344885A (en) High-voltage single-core cable protective covering grounding online monitoring device and control method
CN103389408A (en) High-voltage single-core cable sheath grounding current on-line monitoring device and control method
CN101464488B (en) On-line monitoring system for high voltage cable
CN203350394U (en) Cable fault locating and temperature load on-line monitoring system
CN203465382U (en) Insulation monitoring system of high-voltage cable sheath
CN203455714U (en) ZigBee wireless monitoring system of power line towers
CN201314942Y (en) Monitoring system for detecting the fault of distribution network trolly wires
CN204228878U (en) A kind of cable sheath grounding circulation detection system
CN103852694A (en) Power cable intelligent grounding box
CN202870234U (en) Online fault monitoring system for 10KV circuit
CN203396822U (en) On-line monitoring device for grounding currents flowing through sheaths of high-voltage single-core cables
CN206178051U (en) Defeated power transformation device state integrated monitoring device based on loRa technique
CN203455440U (en) High-voltage single core cable protective layer grounding online monitoring device
CN206556785U (en) A kind of wireless temperature measurement prior-warning device
CN203786250U (en) Power cable intelligent grounding box
CN203311236U (en) Power wireless multi-state monitoring host
CN102855729B (en) Automatic electricity getting residual-current electrical fire supervisory system
CN205210162U (en) High tension cable sheath earth current on -line monitoring system
CN203385486U (en) Online temperature monitoring device for grounding wires of sheath of high-voltage single-core cable
CN105652098A (en) Ground resistance detection and analysis system adopting solar energy to supply power
CN203071651U (en) Residual current remote data collection and operation monitoring system
CN206301021U (en) Power transmission line lightning shielding fault location monitoring system
CN102749553A (en) Automatic positioning device for grounding failure of power transmission line
CN102931733B (en) A kind of residual current remote data acquisition and operation monitoring system
CN202695507U (en) Intelligent junction box

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant