CN102967741A - Voltage-type current transformer for data detection of high-voltage line - Google Patents
Voltage-type current transformer for data detection of high-voltage line Download PDFInfo
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- CN102967741A CN102967741A CN2012104694099A CN201210469409A CN102967741A CN 102967741 A CN102967741 A CN 102967741A CN 2012104694099 A CN2012104694099 A CN 2012104694099A CN 201210469409 A CN201210469409 A CN 201210469409A CN 102967741 A CN102967741 A CN 102967741A
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Abstract
The invention relates to a voltage-type current transformer for data detection of a high-voltage line. The voltage-type current transformer comprises a hollow insulating ceramic element and a base, wherein the insulating ceramic element and the base surround a sealed cavity; a groove is formed in the upper surface of the insulating ceramic element; an inductor is arranged in the sealed cavity and comprises a first metal shielding shell and an induction coil arranged inside the first metal shielding shell; the axis of the induction coil is vertical to the groove; a wireless transceiver is arranged inside or outside the sealed cavity and comprises a wireless transmission processing circuit, an antenna and a second metal shielding shell; the wireless transmission processing circuit is arranged inside the second metal shielding shell; the antenna is arranged outside the second metal shielding shell; and the two ends of the induction coil are connected with the input end of the wireless transmission processing circuit. The voltage-type current transformer can transmit data in a wireless manner, and is simple in structure, low in cost and high in reliability.
Description
(1), technical field: the present invention relates to a kind of current sensor, particularly a kind of high-tension line Data Detection Voltage Type Current Transformer.
(2), background technology: at present, the current measuring device of high-tension line mainly contains induction current transformer, and mainly there is following problem in induction current transformer:
1., be coupled by iron core between conventional induction transformer high voltage side and the secondary side, insulation system between them is complicated, its cost is the exponential relationship rising with the increase of electric pressure, and therefore, high-tension line raises with electric pressure with the current sensor cost to be increased to some extent.
2., conventional induction mutual inductor needs oil-filled and resin-cast, the inflammable and explosive danger of so easy generation, and can make the volume of mutual inductor large, Heavy Weight.
3., the installation of conventional induction mutual inductor need to disconnect high-tension line, increased the line fault point.
4., conventional induction mutual inductor externally generally has extension line, and is not too convenient when installing and using.
(3), summary of the invention:
The technical problem to be solved in the present invention is: not enough for prior art, provide a kind of can wireless transmission data, simple in structure, cost is low, the high-tension line Data Detection Voltage Type Current Transformer of good reliability.
Technical scheme of the present invention:
A kind of high-tension line Data Detection Voltage Type Current Transformer, contain hollow insulating ceramics spare and base, the lower end of insulating ceramics spare is provided with opening, lower ending opening place and the base seal of insulating ceramics spare link together, thereby make insulating ceramics spare and base surround a closed cavity, the upper surface of insulating ceramics spare is provided with a groove, an inductor is installed in the closed cavity, inductor contains the first metal screen case and inductive coil, inductive coil is arranged in the first metal screen case, and the axis of inductive coil is vertical with groove on the insulating ceramics spare upper surface; In the closed cavity or closed cavity be outside equipped with a wireless transceiver, wireless transceiver contains wireless receiving and dispatching treatment circuit, antenna and the second metal screen case, the wireless receiving and dispatching treatment circuit is arranged in the second metal screen case, it is external that antenna is positioned at the second metal shielding, antenna is connected with the antenna end of wireless receiving and dispatching treatment circuit, and the two ends of inductive coil are connected with the input end of wireless receiving and dispatching treatment circuit.
The first metal screen case is by drawing wire and the second metal screen case links together.
When closed cavity arranged wireless transceiver outward, the go out input end that line three-way hole pass with wireless receiving and dispatching treatment circuit of the two ends of inductive coil from base was connected, draw wire also going out from base pass the line three-way hole with the second metal screen case and be connected.
Go out on the side that line three-way hole is arranged on base, go out to be equipped with in the line three-way hole cable splice, the two ends of inductive coil are connected by the input end of cable splice with the wireless receiving and dispatching treatment circuit, draw wire and also are connected with the second metal screen case by cable splice.
Contain rectifier in the wireless receiving and dispatching treatment circuit, power supply changeover device, battery manager, rechargeable battery, wireless transceiver and storer, the two ends of inductive coil are connected with the input end of rectifier, the output terminal of rectifier is connected with the input end of power supply changeover device, power supply changeover device export to the power supply of wireless transceiver and storer, the output terminal of rectifier also is connected with the anode of rechargeable battery, the negative terminal of rechargeable battery is by switching device ground connection, switching on and off of the output control switch device of battery manager, the output signal of inductive coil also enters the input end of analog signal of wireless transceiver, the antennal interface of wireless transceiver is connected with antenna, and the serial communication interface of wireless transceiver is connected with the serial communication interface of storer; The model of wireless transceiver is nRF24E1, and the model of power supply changeover device is MAX8881, and the model of battery manager is DW01, and the model of storer is 2532, and switching device is field effect transistor.
The center of inductive coil is provided with a columnar iron core.
The material of columnar iron core is ferrite.
The first metal screen case contains inside and outside two-layer housing, and outer casing is Stainless Steel Shell, and internal layer shell is copper shell.
Be full of the mucilage binding agent of insulation in the closed cavity, inductor is positioned at the top of closed cavity, and base is hollow shell uncovered above, and the lower end of insulating ceramics spare is encapsulated in the hollow shell by the mucilage binding agent.
The material of hollow shell is metal, and the profile of hollow shell is truncated cone-shaped, and the profile of insulating ceramics spare is turriform.
When using this high-tension line Data Detection to use Voltage Type Current Transformer, a measured wire can be fixed in the groove on the insulating ceramics spare upper surface, ac current signal in wire will make and produce into the voltage signal that is directly proportional with ac current signal in the inductor, the wireless receiving and dispatching treatment circuit sends this voltage signal again by wireless mode, this voltage signal can be used for the current measurement of load measure, relay protection or reactive power compensator; Owing to adopted wireless signalling formula, can not produce because output disconnects the high pressure that forms, eliminated Danger Electric shock risk.
Beneficial effect of the present invention:
1. the present invention places the higher insulating ceramics spare of insulativity with inductor, detects the ac current signal in the wire one time by the inductive coil in the inductor, then the signal that detects is sent by wireless mode; The present invention not only simple in structure, cost is low, and since not because of oil-filled and resin-cast produce inflammable and explosive wait dangerous, its good insulating, reliability height.
2. therefore the present invention has eliminated the magnetic saturation phenomenon owing to do not adopt iron core to do magnetic coupling, and transient response and the stability of mutual inductor operation are improved.
3. the voltage-resistent characteristic of insulating ceramics spare of the present invention is good, sturdy and durable, and whole mutual inductor does not have movable part, therefore can bear continuously large electric current, transient state and switching surge.Do not need to disconnect high-tension line when the present invention installs, easy construction can be installed at any time, and the installation site is flexible, volume is little, save the space, has reduced installation cost.
(4), description of drawings:
Fig. 1 is one of structural representation of high-tension line Data Detection usefulness Voltage Type Current Transformer;
Fig. 2 is the plan structure synoptic diagram of Fig. 1;
Fig. 3 is the sectional structure synoptic diagram that the high-tension line Data Detection among Fig. 1 is used Voltage Type Current Transformer;
Fig. 4 is the high-tension line Data Detection with two of the structural representation of Voltage Type Current Transformer;
Fig. 5 is the plan structure synoptic diagram of Fig. 4;
Fig. 6 is the sectional structure synoptic diagram that the high-tension line Data Detection among Fig. 4 is used Voltage Type Current Transformer;
Fig. 7 is the structure for amplifying synoptic diagram of inductor;
Fig. 8 is one of circuit theory synoptic diagram of wireless receiving and dispatching treatment circuit;
Fig. 9 be the wireless receiving and dispatching treatment circuit the circuit theory synoptic diagram two.
(5), embodiment:
Embodiment one: referring to Fig. 1～Fig. 3, Fig. 7～Fig. 9, among the figure, the high-tension line Data Detection contains hollow insulating ceramics spare 1 and base 2 with Voltage Type Current Transformer, the lower end of insulating ceramics spare 1 is provided with opening, lower ending opening place and the base 2 of insulating ceramics spare 1 are sealed connected together, thereby make insulating ceramics spare 1 and base 2 surround a closed cavity 7, the upper surface of insulating ceramics spare 1 is provided with a groove 3, an inductor is installed in the closed cavity 7, inductor contains the first metal screen case 10 and inductive coil 8, inductive coil 8 is arranged in the first metal screen case 10, and the axis of inductive coil 8 is vertical with groove 3 on insulating ceramics spare 1 upper surface; Also be provided with a wireless transceiver in the closed cavity 7, wireless transceiver contains wireless receiving and dispatching treatment circuit, antenna E1 and the second metal screen case 12, the wireless receiving and dispatching treatment circuit is arranged in the second metal screen case 12, antenna E1 is positioned at outside the second metal screen case 12, antenna E1 is connected with the antenna end of wireless receiving and dispatching treatment circuit, and the two ends of inductive coil 8 are connected with the input end of wireless receiving and dispatching treatment circuit.
The first metal screen case 10 is by drawing wire and the second metal screen case 12 links together.
Contain rectifier U3 in the wireless receiving and dispatching treatment circuit, power supply changeover device U5, battery manager U4, rechargeable battery D1, wireless transceiver U1 and storer U2, the two ends of inductive coil 8 are connected with the input end of rectifier U3, the output terminal of rectifier U3 is connected with the input end of power supply changeover device U5, power supply changeover device U5 exports to wireless transceiver U1 and storer U2 power supply, the output terminal of rectifier U3 also is connected with the anode of rechargeable battery D1, the negative terminal of rechargeable battery D1 is by switching device Q1, Q2 ground connection, the output control switch device Q1 of battery manager U4, Q2 switches on and off, the output signal of inductive coil 8 also enters the input end of analog signal AIN4 of wireless transceiver U1, the antennal interface ANT1 of wireless transceiver U1 is connected with antenna E1, and the serial communication interface of wireless transceiver U1 is connected with the serial communication interface of storer U2; The model of wireless transceiver U1 is nRF24E1, and the model of power supply changeover device U5 is MAX8881, and the model of battery manager U4 is DW01, and the model of storer U2 is 2532, and switching device Q1, Q2 are field effect transistor.
The center of inductive coil 8 is provided with a columnar iron core 9.
The material of columnar iron core 9 is ferrite.
The first metal screen case 10 contains inside and outside two-layer housing, and outer casing 10-1 is Stainless Steel Shell, and internal layer shell 10-2 is copper shell.
Be full of the mucilage binding agent of insulation in the closed cavity 7, inductor is positioned at the top of closed cavity 7, and base 2 is hollow shell uncovered above, and the lower end of insulating ceramics spare 1 is encapsulated in the hollow shell by mucilage binding agent 11.
The material of hollow shell is metal, and the profile of hollow shell is truncated cone-shaped, and the profile of insulating ceramics spare 1 is turriform.
When using this high-tension line Data Detection to use Voltage Type Current Transformer, a measured wire 4 can be fixed in the groove 3 on insulating ceramics spare 1 upper surface, ac current signal in wire 4 will make and produce into the voltage signal that is directly proportional with ac current signal in the inductor, the wireless receiving and dispatching treatment circuit sends this voltage signal again by wireless mode, this voltage signal can be used for the current measurement of load measure, relay protection or reactive power compensator; Owing to adopted wireless signalling formula, can not produce because output disconnects the high pressure that forms, eliminated Danger Electric shock risk.It is on 6kV, 10kV, 20kV, the 35kV electric line that this high-tension line Data Detection is mainly used in electric pressure with Voltage Type Current Transformer.
Embodiment two: referring to Fig. 4～Fig. 9, among the figure, numbering is identical with embodiment one among the figure, the meaning of representative is identical, its course of work is also basic identical, something in common does not repeat, difference is: closed cavity 7 is outside equipped with a wireless transceiver, wireless transceiver contains the wireless receiving and dispatching treatment circuit, antenna E1 and the second metal screen case 13, the wireless receiving and dispatching treatment circuit is arranged in the second metal screen case 13, antenna E1 is positioned at outside the second metal screen case 13, and antenna E1 is connected with the antenna end of wireless receiving and dispatching treatment circuit, and the two ends of inductive coil 8 are connected with the input end of wireless receiving and dispatching treatment circuit.
The first metal screen case 10 is by drawing wire and the second metal screen case 13 links together.
The go out input end that line three-way hole pass with wireless receiving and dispatching treatment circuit of the two ends of inductive coil 8 from base 2 is connected, draw wire also going out from base 2 pass the line three-way hole with the second metal screen case 13 and be connected.
Go out on the side that line three-way hole is arranged on base 1, go out to be equipped with in the line three-way hole cable splice 6, the two ends of inductive coil 8 are connected with the input end of wireless receiving and dispatching treatment circuit by cable splice 6, draw wire and also are connected with the second metal screen case 13 by cable splice 6.
Claims (10)
1. high-tension line Data Detection Voltage Type Current Transformer, it is characterized in that: contain hollow insulating ceramics spare and base, the lower end of insulating ceramics spare is provided with opening, lower ending opening place and the base seal of insulating ceramics spare link together, thereby make insulating ceramics spare and base surround a closed cavity, the upper surface of insulating ceramics spare is provided with a groove, an inductor is installed in the closed cavity, inductor contains the first metal screen case and inductive coil, inductive coil is arranged in the first metal screen case, and the axis of inductive coil is vertical with groove on the insulating ceramics spare upper surface; In the closed cavity or closed cavity be outside equipped with a wireless transceiver, wireless transceiver contains wireless receiving and dispatching treatment circuit, antenna and the second metal screen case, the wireless receiving and dispatching treatment circuit is arranged in the second metal screen case, it is external that antenna is positioned at the second metal shielding, antenna is connected with the antenna end of wireless receiving and dispatching treatment circuit, and the two ends of inductive coil are connected with the input end of wireless receiving and dispatching treatment circuit.
2. high-tension line Data Detection Voltage Type Current Transformer according to claim 1 is characterized in that: described the first metal screen case is by drawing wire and the second metal screen case links together.
3. high-tension line Data Detection Voltage Type Current Transformer according to claim 2, it is characterized in that: when described closed cavity arranges wireless transceiver outward, the go out input end that line three-way hole pass with wireless receiving and dispatching treatment circuit of the two ends of inductive coil from base is connected, described draw wire also going out from base pass the line three-way hole with the second metal screen case and be connected.
4. high-tension line Data Detection Voltage Type Current Transformer according to claim 3, it is characterized in that: describedly go out line three-way hole and be arranged on the side of base, go out to be equipped with in the line three-way hole cable splice, the two ends of inductive coil are connected by the input end of cable splice with the wireless receiving and dispatching treatment circuit, draw wire and also are connected with the second metal screen case by cable splice.
5. high-tension line Data Detection Voltage Type Current Transformer according to claim 1, it is characterized in that: contain rectifier in the described wireless receiving and dispatching treatment circuit, power supply changeover device, battery manager, rechargeable battery, wireless transceiver and storer, the two ends of inductive coil are connected with the input end of rectifier, the output terminal of rectifier is connected with the input end of power supply changeover device, power supply changeover device export to the power supply of wireless transceiver and storer, the output terminal of rectifier also is connected with the anode of rechargeable battery, the negative terminal of rechargeable battery is by switching device ground connection, switching on and off of the output control switch device of battery manager, the output signal of inductive coil also enters the input end of analog signal of wireless transceiver, the antennal interface of wireless transceiver is connected with antenna, and the serial communication interface of wireless transceiver is connected with the serial communication interface of storer; The model of wireless transceiver is nRF24E1.
6. high-tension line Data Detection Voltage Type Current Transformer according to claim 1, it is characterized in that: the center of described inductive coil is provided with a columnar iron core.
7. high-tension line Data Detection Voltage Type Current Transformer according to claim 6, it is characterized in that: the material of described columnar iron core is ferrite.
8. high-tension line Data Detection Voltage Type Current Transformer according to claim 1, it is characterized in that: described the first metal screen case contains inside and outside two-layer housing, and outer casing is Stainless Steel Shell, and internal layer shell is copper shell.
9. high-tension line Data Detection Voltage Type Current Transformer according to claim 1, it is characterized in that: be full of the mucilage binding agent of insulation in the described closed cavity, described inductor is positioned at the top of closed cavity, described base is hollow shell uncovered above, and the lower end of insulating ceramics spare is encapsulated in the hollow shell by the mucilage binding agent.
10. high-tension line Data Detection Voltage Type Current Transformer according to claim 9, it is characterized in that: the material of described hollow shell is metal, and the profile of hollow shell is truncated cone-shaped, and the profile of insulating ceramics spare is turriform.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104694099A CN102967741A (en) | 2012-11-20 | 2012-11-20 | Voltage-type current transformer for data detection of high-voltage line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012104694099A CN102967741A (en) | 2012-11-20 | 2012-11-20 | Voltage-type current transformer for data detection of high-voltage line |
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| CN2012104694099A Pending CN102967741A (en) | 2012-11-20 | 2012-11-20 | Voltage-type current transformer for data detection of high-voltage line |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062483A (en) * | 2014-07-01 | 2014-09-24 | 杭州意能防雷技术有限公司 | Distributed high voltage cable shielding layer current monitoring system and distributed high voltage cable shielding layer current monitoring method thereof |
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| CN2754194Y (en) * | 2004-12-15 | 2006-01-25 | 上海大学 | Current mutual inductor with passive wireless transmission function |
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| WO2012088690A1 (en) * | 2010-12-30 | 2012-07-05 | 西安交通大学 | High-voltage ceramic capacitive sensor for on-line monitoring local discharge of electric generator |
| CN202422985U (en) * | 2011-08-26 | 2012-09-05 | 河南晨诺电气设备有限公司 | Non-access high-voltage current transformer |
| CN202886445U (en) * | 2012-11-20 | 2013-04-17 | 河南新月实业有限公司 | Voltage type current transformer for data detection of high voltage lines |
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2012
- 2012-11-20 CN CN2012104694099A patent/CN102967741A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2754194Y (en) * | 2004-12-15 | 2006-01-25 | 上海大学 | Current mutual inductor with passive wireless transmission function |
| CN201251593Y (en) * | 2008-07-02 | 2009-06-03 | 范江涛 | Self-supported type high voltage current wireless sensor |
| CN201332015Y (en) * | 2008-12-30 | 2009-10-21 | 张航生 | Electron type current transformer |
| CN102313856A (en) * | 2010-06-30 | 2012-01-11 | 北京泰优美科技有限责任公司 | Intelligent 10kV power line state sensor |
| WO2012088690A1 (en) * | 2010-12-30 | 2012-07-05 | 西安交通大学 | High-voltage ceramic capacitive sensor for on-line monitoring local discharge of electric generator |
| CN202422985U (en) * | 2011-08-26 | 2012-09-05 | 河南晨诺电气设备有限公司 | Non-access high-voltage current transformer |
| CN202886445U (en) * | 2012-11-20 | 2013-04-17 | 河南新月实业有限公司 | Voltage type current transformer for data detection of high voltage lines |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104062483A (en) * | 2014-07-01 | 2014-09-24 | 杭州意能防雷技术有限公司 | Distributed high voltage cable shielding layer current monitoring system and distributed high voltage cable shielding layer current monitoring method thereof |
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Application publication date: 20130313 |