CN103792428A - Three-phase cable phase measurement apparatus and use method thereof - Google Patents
Three-phase cable phase measurement apparatus and use method thereof Download PDFInfo
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- CN103792428A CN103792428A CN201310673469.7A CN201310673469A CN103792428A CN 103792428 A CN103792428 A CN 103792428A CN 201310673469 A CN201310673469 A CN 201310673469A CN 103792428 A CN103792428 A CN 103792428A
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Abstract
The invention discloses a three-phase cable phase measurement device and a use method thereof, and belongs to the field of electric meters. With the three-phase cable phase measurement device and the use method thereof of the invention adopted, the problem of incapability of accurately measuring phase under a high-induction voltage or low-insulation resistance environment can be solved. The three-phase cable phase measurement device comprises a DC output device which is provided with a first AC input end, three DC output ends, an overvoltage protection component, a first isolation rectifying component and a switch, and a DC detection device which is provided with three current detection components, corresponding DC input ends and a battery. The use method of the three-phase cable phase measurement device includes the following steps that: two ends of a tested three-phase cable are respectively connected with the DC output ends and the DC input ends; and after DC is outputted from each of the DC output ends respectively, data of the three current detection components are compared, such that the phase can be obtained. According to the three-phase cable phase measurement apparatus and the use method thereof, the overvoltage protection component inducts voltage in a bypass manner, and therefore, the DC can be outputted under high-induction voltage, such that the phase can be measured; and a DC loop phasing mode is adopted, the phase of the three-phase cable can be measured through DC single-phase output and three-phase synchronous detection, and therefore, the phase can be measured under low-insulation resistance.
Description
Technical field
The present invention relates to electric instruments and apparatus field, particularly a kind of threephase cable phase determination device and using method thereof.
Background technology
At present, in the time measuring the transmission line of electricity phase place of threephase cable, what often adopt is megger phasing method.Because transmission line of electricity is generally long, short several kilometers, long tens kilometers of kilometers even up to a hundred, also often there is the scissors crossing or parallel with it of other transmission lines of electricity therebetween, can produce very high induced voltage at measurement circuit, may make the sensed voltage breakdown of ammeter, thereby cause the phasing work of transmission line of electricity to complete.In addition, testing continuously after rainy weather or snow, because humidity is higher or circuit covers accumulated snow, the insulation resistance recording is approximately zero, thereby cannot make differentiation to the phase place of circuit.
Summary of the invention
The object that the present invention will reach is to provide a kind of threephase cable phase determination device and using method thereof, can under the state of high induction voltage or low line insulation resistance, measure the phase place of threephase cable.
In order to achieve the above object, the present invention adopts following technical scheme: a kind of threephase cable phase determination device, comprise DC output devices and direct current pick-up unit, DC output devices comprises the first alternating current input end, three DC output ends, the overvoltage protection assembly of bypass induced voltage and from the first alternating current input end obtain alternating current after isolation rectification for DC output end provides galvanic the first isolation rectification assembly, also comprise that controlling three DC output ends leads to, the switch of power-off, overvoltage protection assembly is located on the circuit of DC output end and the first isolation rectification inter-module, direct current pick-up unit comprises three inspection stream assemblies that can show current data, and each inspection stream assembly is provided with a direct current input end, is also included as the battery of inspection stream assembly power supply.
Further, described DC output devices also comprises first Control Component that can show current data, described DC output end is located on the first Control Component, DC output end is connected with described the first isolation rectification electrical component by the first Control Component, and described switch is located on the first Control Component.Obtain the direct current of the first isolation rectification assembly by the first Control Component, then be provided in each DC output end, switch is integrated on the first Control Component, manipulation is convenient, and can contrast in real time the current data of the first Control Component and the current data of inspection stream assembly, draw the related conclusions of more and tested threephase cable.
Further, described DC output devices also comprises from the first alternating current input end obtains alternating current the table meter power supply module for described the first Control Component power supply, and table meter power supply module is electrically connected with the first Control Component.Separately establishing assembly is the operation power supply of the first Control Component, makes the first Control Component not affect direct current electric current.
Further, described DC output devices also comprises galvanometer, and galvanometer is electrically connected with the electric current output of the first isolation rectification assembly, the electric current output of table meter power supply module respectively.Detect direct current and AC current, operating personnel read electric current when excessive controllable device shut down, prevent device damage.
Further, each described DC output end is respectively equipped with a pilot lamp.That DC output end of output current is shown intuitively.
Further, described direct current pick-up unit comprises the second Control Component, and described battery is electrically connected with the second Control Component, and each described inspection stream assembly is electrically connected with the second Control Component respectively.Battery is that the power supply of direct current pick-up unit is safer by the second Control Component, and it is more convenient that the second Control Component can comprehensively manipulate each inspection stream assembly.
Further, described direct current pick-up unit comprises the second alternating current input end and obtains alternating current from the second alternating current input end is that described battery charges and is the second isolation rectification assembly of inspection stream assembly power supply by described the second Control Component after isolation rectification, and the second isolation rectification assembly is electrically connected with control loop.When battery electric quantity is not enough, can pass through the second alternating current input end external AC, be rectified into after direct current as battery charges by the second isolation rectification assembly, and be that the miscellaneous part of direct current pick-up unit is powered.
The present invention discloses the using method of above-mentioned any threephase cable phase determination device: three sub-the end of a thread of tested threephase cable one end are electrically connected with three DC output ends of DC output devices in threephase cable phase determination device respectively, three sub-the end of a thread of the tested threephase cable other end are electrically connected with the direct current input end that assemblies are flowed in three inspections of direct current pick-up unit in threephase cable phase determination device respectively, start direct current pick-up unit, enable DC output devices, by first output direct current in three DC output ends, the current conditions showing in three inspection stream assemblies of observation direct current pick-up unit, corresponding sub-the end of a thread of inspection stream assembly with electric current is identical with the galvanic sub-the end of a thread phase place of output, again successively by second in three DC output ends, the 3rd output direct current, record corresponding phase state.
Adopt after technique scheme, tool of the present invention has the following advantages:
By overvoltage protection assembly bypass induced voltage; can under high induction voltage, export direct current to measure phase place; adopt DC loop circuit phasing mode, detect the phase place with threephase cable by the single-phase output of direct current, three-phase synchronous, can under low insulation resistance, measure phase place.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is the schematic diagram of DC output devices in the embodiment of the present invention one;
Fig. 2 is the schematic diagram of direct current pick-up unit in the embodiment of the present invention one;
Fig. 3 is the schematic diagram that the embodiment of the present invention one is used state.
Embodiment
Embodiment mono-
See Fig. 1-Fig. 3, a kind of threephase cable phase determination device, comprises DC output devices 1 and direct current pick-up unit 2.
The first Control Component 12 is provided with DC output end A, DC output end B, DC output end C and can to control three DC output ends logical, the switch (not shown) of power-off, each DC output end is electrically connected with the first isolation rectification assembly 11 by the first Control Component 12, obtain the direct current of the first isolation rectification assembly 11 by the first Control Component 12, then be provided in each DC output end, switch is integrated on the first Control Component 12, manipulation is convenient, and can contrast in real time the current data of the first Control Component 12 and the current data of inspection stream assembly, draw the related conclusions of more and tested threephase cable L, each DC output end is respectively equipped with a pilot lamp (not shown), and that DC output end of output current is shown intuitively.Separately establish the operation power supply that table meter power supply module 14 is the first Control Component 12, make the first Control Component 12 not affect direct current electric current.Overvoltage protection assembly 13 is located on the circuit between DC output end and the first isolation rectification assembly 11, can bypass induced voltage, can under high induction voltage, export direct current to measure phase place.Galvanometer 15 be electrically connected with the electric current output of the electric current output of the first isolation rectification assembly 11, table meter power supply module 14 respectively, detects direct current and AC current, and operating personnel read to obtain electric current controllable device shutdown when excessive, prevent device damage.The first Control Component 12 ground connection are with protection equipment.
Direct current pick-up unit 2 comprises inspection stream assembly E, inspection stream assembly F, the inspection stream assembly G that can show current data, each inspection stream assembly is provided with a direct current input end, also comprises the second Control Component 22, battery 23 for inspection stream assembly power supply, the second alternating current input end N, obtains alternating current charged and be the second isolation rectification assembly 21 that assembly power supply is flowed in inspection for battery 23 by the second Control Component 22 after isolation rectification from the second alternating current input end N.
Inspection stream assembly obtains DC current by tested threephase cable L from DC output end.Battery 23 is electrically connected with the second Control Component 22, and each inspection stream assembly is electrically connected with the second Control Component 22 respectively, and battery 23 is powered saferly by the second Control Component 22 for direct current pick-up unit 2, and it is more convenient that the second Control Component 22 can comprehensively manipulate each inspection stream assembly.The second isolation rectification assembly 21 is electrically connected with control loop, when battery 23 electric weight are not enough, can pass through the second alternating current input end N external AC, charge for battery 23 after being rectified into direct current by the second isolation rectification assembly 21, and be the miscellaneous part power supply of direct current pick-up unit 2.Each inspection stream assembly ground connection is with protection equipment.
Embodiment bis-
See Fig. 3, the using method of the threephase cable phase determination device in embodiment mono-: by three sub-the end of a thread of tested threephase cable L one end respectively with DC output end A, DC output end B, DC output end C electrical connection, three sub-the end of a thread of the other end flow assembly E with inspection respectively, inspection stream assembly F, the direct current input end electrical connection of inspection stream assembly G, start direct current pick-up unit 2, enable DC output devices 1, first control DC output end A output direct current by the first Control Component 12, the inspection stream assembly E of observation direct current pick-up unit 2, inspection stream assembly F, the current conditions showing in inspection stream assembly G, the sub-the end of a thread phase place corresponding with DC output end A with corresponding sub-the end of a thread of inspection stream assembly of electric current is identical, control DC output end B by the first Control Component 12 successively again, DC output end C exports direct current, record corresponding phase state.
By overvoltage protection assembly bypass induced voltage; can under high induction voltage, export direct current to measure phase place; adopt DC loop circuit phasing mode, detect the phase place with threephase cable by the single-phase output of direct current, three-phase synchronous, can under low insulation resistance, measure phase place.While using megger method to detect the phase place of the threephase cable of totally 21 groups of circuits in practical application, there are 4 groups of circuits cannot correctly to measure due to high induction voltage or low insulation resistance, and use apparatus and method provided by the invention all to complete correct mensuration.
Except above preferred embodiment, the present invention also has other embodiment, and those skilled in the art can make according to the present invention various changes and distortion, only otherwise depart from spirit of the present invention, all should belong to the defined scope of claims of the present invention.
Claims (8)
1. a threephase cable phase determination device, it is characterized in that: comprise DC output devices (1) and direct current pick-up unit (2), DC output devices comprises the first alternating current input end (M), three DC output ends, the overvoltage protection assembly (13) of bypass induced voltage, from the first alternating current input end obtain alternating current after isolation rectification for DC output end provides galvanic the first isolation rectification assembly (11), also comprise that controlling three DC output ends leads to, the switch of power-off, overvoltage protection assembly is located on the circuit of DC output end and the first isolation rectification inter-module, direct current pick-up unit comprises three inspection stream assemblies that can show current data, and each inspection stream assembly is provided with a direct current input end, is also included as the battery (23) of inspection stream assembly power supply.
2. a kind of threephase cable phase determination device according to claim 1, it is characterized in that: described DC output devices also comprises first Control Component (12) that can show current data, described DC output end is located on the first Control Component, DC output end is connected with described the first isolation rectification electrical component by the first Control Component, and described switch is located on the first Control Component.
3. a kind of threephase cable phase determination device according to claim 2, it is characterized in that: described DC output devices also comprises from the first alternating current input end obtains alternating current the table meter power supply module (14) for described the first Control Component power supply, and table meter power supply module is electrically connected with the first Control Component.
4. a kind of threephase cable phase determination device according to claim 3, it is characterized in that: described DC output devices also comprises galvanometer (15), galvanometer is electrically connected with the electric current output of the first isolation rectification assembly, the electric current output of table meter power supply module respectively.
5. a kind of threephase cable phase determination device according to claim 4, is characterized in that: each described DC output end is respectively equipped with a pilot lamp.
6. according to the arbitrary described a kind of threephase cable phase determination device of claim 1-5, it is characterized in that: described direct current pick-up unit comprises the second Control Component (22), described battery is electrically connected with the second Control Component, and each described inspection stream assembly is electrically connected with the second Control Component respectively.
7. a kind of threephase cable phase determination device according to claim 6, it is characterized in that: described direct current pick-up unit comprises the second alternating current input end (N) and obtains alternating current from the second alternating current input end is that described battery charges and is the second isolation rectification assembly (21) of inspection stream assembly power supply by described the second Control Component after isolation rectification, and the second isolation rectification assembly is electrically connected with control loop.
8. the method for the arbitrary described threephase cable phase determination device of right to use requirement 1-7, it is characterized in that: three sub-the end of a thread of tested threephase cable (L) one end are electrically connected with three DC output ends of DC output devices in threephase cable phase determination device respectively, three sub-the end of a thread of the tested threephase cable other end are electrically connected with the direct current input end that assemblies are flowed in three inspections of direct current pick-up unit in threephase cable phase determination device respectively, start direct current pick-up unit, enable DC output devices, by first output direct current in three DC output ends, the current conditions showing in three inspection stream assemblies of observation direct current pick-up unit, corresponding sub-the end of a thread of inspection stream assembly with electric current is identical with the galvanic sub-the end of a thread phase place of output, again successively by second in three DC output ends, the 3rd output direct current, record corresponding phase state.
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| CN201310673469.7A CN103792428B (en) | 2013-12-10 | 2013-12-10 | Three-phase cable phase measurement apparatus and use method thereof |
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| CN201310673469.7A CN103792428B (en) | 2013-12-10 | 2013-12-10 | Three-phase cable phase measurement apparatus and use method thereof |
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| CN103792428A true CN103792428A (en) | 2014-05-14 |
| CN103792428B CN103792428B (en) | 2015-03-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110221133A (en) * | 2019-06-17 | 2019-09-10 | 国网湖南省电力有限公司 | A kind of quick phasing adjustement of electric system high-tension line and its application method |
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| CN2859551Y (en) * | 2005-12-26 | 2007-01-17 | 西安四方机电有限责任公司 | Intellectual power cable phase detecting instrument |
| CN201063054Y (en) * | 2007-06-27 | 2008-05-21 | 临安科星电子有限公司 | Isolated circuit for detecting power supply phase |
| CN201107352Y (en) * | 2007-11-26 | 2008-08-27 | 西安信源高压电器有限公司 | High voltage electrified display safety and defend apparatus |
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| CN2859551Y (en) * | 2005-12-26 | 2007-01-17 | 西安四方机电有限责任公司 | Intellectual power cable phase detecting instrument |
| CN201063054Y (en) * | 2007-06-27 | 2008-05-21 | 临安科星电子有限公司 | Isolated circuit for detecting power supply phase |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110221133A (en) * | 2019-06-17 | 2019-09-10 | 国网湖南省电力有限公司 | A kind of quick phasing adjustement of electric system high-tension line and its application method |
| CN110221133B (en) * | 2019-06-17 | 2024-08-06 | 国网湖南省电力有限公司 | Rapid phasing device for high-voltage line of power system and application method of rapid phasing device |
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| CN103792428B (en) | 2015-03-25 |
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