CN103441725A - System for monitoring and controlling grounding currents of transformer core - Google Patents
System for monitoring and controlling grounding currents of transformer core Download PDFInfo
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- CN103441725A CN103441725A CN2013103784162A CN201310378416A CN103441725A CN 103441725 A CN103441725 A CN 103441725A CN 2013103784162 A CN2013103784162 A CN 2013103784162A CN 201310378416 A CN201310378416 A CN 201310378416A CN 103441725 A CN103441725 A CN 103441725A
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Abstract
The invention discloses a system for monitoring and controlling grounding currents of a transformer core. The system for monitoring and controlling the grounding currents of the transformer core comprises a transformer, a current collection unit, a single-chip microcomputer and a control module, wherein the transformer is connected with the current collection unit, the single-chip microcomputer is provided with two interface modules which are connected with the current collection unit and the control module respectively, the control module comprises a motor, a rotation device and an adjustable resistor, two current input ends of the current collection unit are connected with the upper ends of two fuses respectively, the fuses are arranged on a transformer core grounding wire and a transformer added part grounding wire, and two output ends of the adjustable resistor are connected with the lower ends of the two fuses respectively. When the detected currents are larger than a rated value stored in the single-chip microcomputer, the single-chip microcomputer will automatically control a control circuit to adjust the adjustable resistor until the currents of the transformer are smaller than the rate currents stored in the single-chip microcomputer, therefore, the workload for operators is lightened, and the influence caused by too large currents between two times of detection of equipment on power usage of a user is reduced.
Description
technical field:
The present invention relates to a kind of earth current monitoring and control device, particularly relate to a kind of transformer iron core grounding current monitoring and control system.
background technology:
The annual detection once of national grid regulation 110KV grade transformer, the annual detection twice of transformer that the 220KV grade is above, require transformer core current in service to be not more than 0.1A, in the time of annual live testing, the operator is the current value that uses common clamp on amperemeter measuring transformer iron core grounding band iron, and record.The drawback of this method is that common current pincers accuracy of measurement is low, easily is disturbed, and twice preventive test time interval is long, and the earth current of burst transfinites, and fault is very difficult to be found.
When detecting, when the transformer iron core grounding current value surpasses the 0.1A of regulation, the operator normally disconnects the iron core grounding line, adjustable resistance and ammeter in series connection, manual adjustments resistance, observe ammeter numerical value until lower than 0.1A, again adjustable resistance is replaced by the high-power resistance of fixed resistance value, remove ammeter, reply ground lead, wait for the overhaul processing.The drawback of this method is interim complex disposal process, and the time is long, and the series resistance circuit does not possess water-proof function, and overhaul and sense cycle are long, during waiting for overhaul, can not guarantee that transformer core current can not surpass 0.1A again.
summary of the invention:
Technical problem to be solved by this invention is: overcome the deficiencies in the prior art, provide a kind of simple and practical, can detect in real time and the monitoring of the transformer iron core grounding current of control transformer iron core grounding current and control system.
Technical scheme of the present invention is: a kind of transformer iron core grounding current monitoring and control system, comprise transformer, current acquisition unit, single-chip microcomputer, control module, wherein: transformer is connected with the current acquisition unit, described single-chip microcomputer has two interface modules, with current acquisition unit, control module, connect respectively, described control module comprises motor, tumbler and adjustable resistance.
Two current input terminals of described current acquisition unit are connected with two fuse upper ends respectively, and described fuse is arranged on the transformer core grounding line and transformer adds on the part earth connection, and two outputs of adjustable resistance are connected to the lower end of two fuses.Described single-chip microcomputer is connected with the computer of control centre by communication module and electric power APN private network.Described current acquisition unit is 2 core band shielding conductors with the wire that is connected between transformer and single-chip microcomputer, and single-chip microcomputer, communication module, current acquisition unit, control module outside are provided with the anti-electromagnetism facility of waterproof.Be connected by the RS485 interface between described single-chip microcomputer and current acquisition unit, and 24V voltage is provided.
The invention has the beneficial effects as follows:
When the electric current that 1, the present invention detects is greater than the rated value that deposits control circuit in, by electric power APN private network with the GPRS wireless transmission method, data are sent to the computer of control centre, remind the operator to carry out on-call maintenance to equipment, and with electric power APN private network transmission Data safeguard communication data accurately and safety.
When the electric current that 2, the present invention detects is greater than the rated value deposited in single-chip microcomputer, single-chip microcomputer can automatically be controlled control circuit adjustable resistance is regulated, until transformer core current is less than the rated current stored in single-chip microcomputer, alleviated operator's work load, excessive because of electric current between twice detection of minimizing equipment, electricity consumption user's electricity consumption is impacted.
3, the installation of system of the present invention does not change wiring, the ground connection pattern of original power equipment, can not cause any interference and impact to primary system, and adopts shielding casing, prevents that magnetic field that transformer produces from impacting detection and the control precision of equipment.
4, the present invention is provided with fuse, automatically fusing when transformer core grounding line and transformer add electric current on the part earth connection and surpass certain value, cut off original earth connection, and current auto-controller is connected to transformer core and transformer adds in the part earth connection, realized the automation of operation.
5, the present invention is simple and practical, can detect in real time and the control transformer iron core grounding current, and it is applied widely, and handled easily person's operation, use manpower and material resources sparingly, and is easy to promotion and implementation.
the accompanying drawing explanation:
Fig. 1 is transformer iron core grounding current monitoring and control system connection diagram.
embodiment:
Embodiment: referring to Fig. 1, in figure, 1-transformer core grounding line, 2-transformer clamping earth connection, 3-fuse, 4-current acquisition unit, 5-single-chip microcomputer, 6-communication module, 7-motor, the 8-adjustable resistance, 9-control centre computer, 10-transformer, 11-waterproof, anti-electromagnetic cage.
Transformer iron core grounding current monitoring and control system: it comprises transformer 10, current acquisition unit 4, single-chip microcomputer 5, control module, wherein: transformer 10 is connected with current acquisition unit 4, single-chip microcomputer 5 has two interface modules, with current acquisition unit 4, control module, connect respectively, control module comprises motor 7, tumbler and adjustable resistance 8.
Two current input terminals of current acquisition unit 4 are connected with two fuse 3 upper ends respectively, and fuse 3 is arranged on transformer core grounding line 1 and transformer adds on part earth connection 2, and two outputs of adjustable resistance 8 are connected to the lower end of two fuses 3.
Single-chip microcomputer 5 is connected with the computer of control centre by communication module 6 and electric power APN private network.
Current acquisition unit 4 is 2 core band shielding conductors with the wire that is connected between transformer 10 and single-chip microcomputer 5, and single-chip microcomputer 5, communication module 6, current acquisition unit 4, control module outside are provided with the anti-electromagnetism facility of waterproof.
Be connected by the RS485 interface between single-chip microcomputer 5 and current acquisition unit 4, and 24V voltage is provided.
During use, transformer core grounding line 1 is connected with two electric current input ports of current acquisition unit 4 respectively with the upper end that transformer adds fuse 3 on part earth connection 2, current acquisition unit 4 sends to through adjusting the signal of telecommunication detected in single-chip microcomputer 5, single-chip microcomputer 5 compares according to the rated value and the input electrical signal value that deposit in, if the input electrical signal value is less than the rated value deposited in, equipment continues operation, if the input electrical signal value is greater than the rated value deposited in, single-chip microcomputer 5 passes through electric power APN private network with the GPRS wireless transmission method, the input electrical signal value is sent on the computer of control centre, 7 pairs of adjustable resistances 8 of automatic control motor are regulated simultaneously, until transformer core current is less than the rated current stored in single-chip microcomputer 5.
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, any simple modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment, all still belong in the scope of technical solution of the present invention.
Claims (5)
1. a transformer iron core grounding current is monitored and control system, comprise transformer, current acquisition unit, single-chip microcomputer, control module, it is characterized in that: transformer is connected with the current acquisition unit, described single-chip microcomputer has two interface modules, with current acquisition unit, control module, connect respectively, described control module comprises motor, tumbler and adjustable resistance.
2. transformer iron core grounding current according to claim 1 is monitored and control system, it is characterized in that: two current input terminals of described current acquisition unit are connected with two fuse upper ends respectively, described fuse is arranged on the transformer core grounding line and transformer adds on the part earth connection, and two outputs of adjustable resistance are connected to the lower end of two fuses.
3. transformer iron core grounding current according to claim 1 is monitored and control system, and it is characterized in that: described single-chip microcomputer is connected with the computer of control centre by communication module and electric power APN private network.
4. transformer iron core grounding current according to claim 1 is monitored and control system, it is characterized in that: described current acquisition unit is 2 core band shielding conductors with the wire that is connected between transformer and single-chip microcomputer, and single-chip microcomputer, communication module, current acquisition unit, control module outside are provided with the anti-electromagnetism facility of waterproof.
5. transformer iron core grounding current according to claim 1 monitoring and control system is characterized in that: be connected by the RS485 interface between described single-chip microcomputer and current acquisition unit, and 24V voltage is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103784162A CN103441725A (en) | 2013-08-27 | 2013-08-27 | System for monitoring and controlling grounding currents of transformer core |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103784162A CN103441725A (en) | 2013-08-27 | 2013-08-27 | System for monitoring and controlling grounding currents of transformer core |
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| CN103441725A true CN103441725A (en) | 2013-12-11 |
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| CN2013103784162A Pending CN103441725A (en) | 2013-08-27 | 2013-08-27 | System for monitoring and controlling grounding currents of transformer core |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042465A (en) * | 2015-06-02 | 2015-11-11 | 绵阳科耀电子科技有限公司 | LED automobile headlamp capable of dynamically adjusting light color temperature |
| CN106199164A (en) * | 2016-06-28 | 2016-12-07 | 国网河南桐柏县供电公司 | A kind of measuring method of transformer iron core grounding current |
| CN106546631A (en) * | 2016-10-26 | 2017-03-29 | 陈汝霖 | A kind of condom electric-examination instrument |
| CN107176118A (en) * | 2017-05-22 | 2017-09-19 | 芜湖博康机电有限公司 | A kind of vehicle switch assembly acted on anti-electric current counterattack |
| CN114655682A (en) * | 2021-11-30 | 2022-06-24 | 国网江苏省电力有限公司盐城供电分公司 | Transformer magnetic core feeding and assembling structure |
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| CN202906454U (en) * | 2012-11-28 | 2013-04-24 | 国家电网公司 | Transformer iron core and clamp multi-point grounding automatic current limiting safety device |
| CN203133157U (en) * | 2013-03-21 | 2013-08-14 | 辽宁省电力有限公司电力科学研究院 | Transformer iron core/clamp grounding current wireless monitoring device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105042465A (en) * | 2015-06-02 | 2015-11-11 | 绵阳科耀电子科技有限公司 | LED automobile headlamp capable of dynamically adjusting light color temperature |
| CN106199164A (en) * | 2016-06-28 | 2016-12-07 | 国网河南桐柏县供电公司 | A kind of measuring method of transformer iron core grounding current |
| CN106199164B (en) * | 2016-06-28 | 2019-07-12 | 国网河南桐柏县供电公司 | A kind of measurement method of transformer iron core grounding current |
| CN106546631A (en) * | 2016-10-26 | 2017-03-29 | 陈汝霖 | A kind of condom electric-examination instrument |
| CN107176118A (en) * | 2017-05-22 | 2017-09-19 | 芜湖博康机电有限公司 | A kind of vehicle switch assembly acted on anti-electric current counterattack |
| CN114655682A (en) * | 2021-11-30 | 2022-06-24 | 国网江苏省电力有限公司盐城供电分公司 | Transformer magnetic core feeding and assembling structure |
| CN114655682B (en) * | 2021-11-30 | 2023-09-05 | 国网江苏省电力有限公司盐城供电分公司 | Transformer magnetic core material loading and assembly structure |
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Application publication date: 20131211 |
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