CN103792428B - 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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- CN103792428B CN103792428B CN201310673469.7A CN201310673469A CN103792428B CN 103792428 B CN103792428 B CN 103792428B CN 201310673469 A CN201310673469 A CN 201310673469A CN 103792428 B CN103792428 B CN 103792428B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005259 measurement Methods 0.000 title abstract description 7
- 238000002955 isolation Methods 0.000 claims abstract description 29
- 238000007689 inspection Methods 0.000 claims description 31
- 230000000712 assembly Effects 0.000 claims description 4
- 238000000429 assembly Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 abstract description 6
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract 4
- 230000005611 electricity Effects 0.000 description 5
- 230000006698 induction Effects 0.000 description 5
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- 238000010586 diagram Methods 0.000 description 3
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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, when 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 then several kilometers, long then 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, very high induced voltage can be produced at measurement circuit, the sensed voltage breakdown of ammeter may be made, thus cause the phasing work of transmission line of electricity to complete.In addition, test after continuous rainy weather or snow, because humidity is higher or circuit covers accumulated snow, the insulaion resistance recorded is approximately zero, thus 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 measure the phase place of threephase cable under the state of high induction voltage or low line insulation resistance.
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 DC detecting device, DC output devices comprises the first alternating current input, three DC output ends, the overvoltage protection assembly of bypass induced voltage and obtain alternating current after isolation rectification for DC output end provides galvanic first isolation rectification assembly from the first alternating current input, also comprise control three DC output ends to lead 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, DC detecting device comprises three inspection stream assemblies that can show current data, and each inspection stream assembly is provided with a direct current input, also comprises the battery for 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 first isolation rectification electrical component by the first Control Component, and described switch is located on the first Control Component.The direct current of the first isolation rectification assembly is obtained by the first Control Component, then each DC output end is provided in, switch is integrated on the first Control Component, manipulation is convenient, and can real time contrast first Control Component current data and inspection stream assembly current data, draw the related conclusions of more and tested threephase cable.
Further, described DC output devices also comprises from the first alternating current input acquisition alternating current and the table meter power supply module of powering for described first Control Component, and table meter power supply module is electrically connected with the first Control Component.Separately set assembly to power as the operation of the first Control Component, make the first Control Component not affect DC current flow.
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 showing to count power supply module respectively.Detect direct current and AC current, operating personnel read electric current excessive time controllable device shut down, prevent device damage.
Further, each described DC output end is respectively equipped with an indicator lamp.That DC output end of output current is shown intuitively.
Further, described DC detecting device 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 DC detecting device is powered safer by the second Control Component, and it is more convenient that the second Control Component comprehensively can manipulate each inspection stream assembly.
Further, described DC detecting device comprises the second alternating current input and obtains alternating current after isolation rectification from the second alternating current input is that described battery charge and be examine to flow the second isolation rectification assembly of assembly power supply by described second Control Component, and the second isolation rectification assembly is electrically connected with control loop.When battery electric quantity is not enough, by the second alternating current input external AC, for battery charges after being rectified into direct current by the second isolation rectification assembly, and be that the miscellaneous part of DC detecting device is powered.
The present invention discloses the using method of any threephase cable phase determination device above-mentioned: be electrically connected with three DC output ends of DC output devices in threephase cable phase determination device respectively by three sub-the end of a thread of tested threephase cable one end, three sub-the end of a thread of the tested threephase cable other end are examined with three of DC detecting device in threephase cable phase determination device the direct current input flowing assembly be respectively electrically connected, start DC detecting device, enable DC output devices, direct current is exported by first in three DC output ends, the current conditions shown in observation DC detecting device three inspection stream assemblies, sub-the end of a thread that an inspection with electric current is flowed corresponding to assembly is identical with the galvanic sub-the end of a thread phase place of output, again successively by second in three DC output ends, 3rd exports direct current, record corresponding phase state.
After adopting technique scheme, tool of the present invention has the following advantages:
By overvoltage protection assembly bypass induced voltage; direct current can be exported to measure phase place under high induction voltage; adopt dc loop circuit phasing mode, detected with the phase place of threephase cable by direct-current single-phase output, three-phase synchronous, phase place can be measured under low insulation resistance.
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 DC detecting device in the embodiment of the present invention one;
Fig. 3 is the schematic diagram of the embodiment of the present invention one using state.
Detailed description of the invention
Embodiment one
See Fig. 1-Fig. 3, a kind of threephase cable phase determination device, comprises DC output devices 1 and DC detecting device 2.
DC output devices 1 comprise the first alternating current input M, bypass induced voltage overvoltage protection assembly 13 and obtain alternating current after isolation rectification for DC output end provides galvanic first isolation rectification assembly 11, can show the first Control Component 12 of current data, obtains alternating current and be table meter power supply module 14, the galvanometer 15 that the first Control Component 12 is powered from the first alternating current input M from the first alternating current input M.
First Control Component 12 is provided with DC output end A, DC output end B, DC output end C and can control three DC output ends lead to, 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, the direct current of the first isolation rectification assembly 11 is obtained by the first Control Component 12, then each DC output end is provided in, switch is integrated on the first Control Component 12, manipulation is convenient, and can real time contrast first Control Component 12 current data and inspection stream assembly current data, draw the related conclusions of more and tested threephase cable L, each DC output end is respectively equipped with an indicator lamp (not shown), and that DC output end of output current is shown intuitively.Separately set table meter power supply module 14 to power as the operation of the first Control Component 12, make the first Control Component 12 not affect DC current flow.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 export direct current to measure phase place under high induction voltage.Galvanometer 15 is electrically connected with the electric current output of the first isolation rectification assembly 11, the electric current output of showing to count power supply module 14 respectively, detects direct current and AC current, operating personnel read electric current excessive time controllable device shut down, prevent device damage.First Control Component 12 ground connection is with proterctive equipment.
DC detecting device 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, also comprises the second Control Component 22, for battery 23, the second alternating current input N of inspection stream assembly power supply, to obtain alternating current from the second alternating current input N after isolation rectification be that battery 23 charges and be examine the second isolation rectification assembly 21 flowing assembly power supply by the second Control Component 22.
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 safer by the second Control Component 22 for DC detecting device 2, and it is more convenient that the second Control Component 22 comprehensively can manipulate each inspection stream assembly.Second isolation rectification assembly 21 is electrically connected with control loop, when battery 23 electricity is not enough, by the second alternating current input N external AC, charge for battery 23 after being rectified into direct current by the second isolation rectification assembly 21, and power for the miscellaneous part of DC detecting device 2.Each inspection stream assembly ground connection is with proterctive equipment.
Embodiment two
See Fig. 3, the using method of the threephase cable phase determination device in embodiment one: 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 is electrically connected, 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 electrical connection of inspection stream assembly G, start DC detecting device 2, enable DC output devices 1, first control DC output end A by the first Control Component 12 and export direct current, the inspection stream assembly E of observation DC detecting device 2, inspection stream assembly F, the current conditions shown in inspection stream assembly G, the sub-the end of a thread phase place corresponding with DC output end A with the sub-the end of a thread corresponding to one of electric current inspection stream assembly is identical, DC output end B is controlled successively again by the first Control Component 12, DC output end C exports direct current, record corresponding phase state.
By overvoltage protection assembly bypass induced voltage; direct current can be exported to measure phase place under high induction voltage; adopt dc loop circuit phasing mode, detected with the phase place of threephase cable by direct-current single-phase output, three-phase synchronous, phase place can be measured under low insulation resistance.When 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 various change and distortion according to the present invention, only otherwise depart from spirit of the present invention, all should belong to the scope that claims of the present invention define.
Claims (2)
1. a threephase cable phase determination device, it is characterized in that: comprise DC output devices (1) and DC detecting device (2), DC output devices comprises the first alternating current input (M), three DC output ends, the overvoltage protection assembly (13) of bypass induced voltage, alternating current is obtained after isolation rectification for DC output end provides galvanic first isolation rectification assembly (11) from the first alternating current input, also comprise control three DC output ends to lead 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, DC detecting device comprises three inspection stream assemblies that can show current data, and each inspection stream assembly is provided with a direct current input, also comprises the battery (23) for inspection stream assembly power supply, 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 first isolation rectification electrical component by the first Control Component, and described switch is located on the first Control Component, described DC output devices also comprises from the first alternating current input acquisition alternating current and the table meter power supply module (14) of powering for described first Control Component, and table meter power supply module is electrically connected with the first Control Component, described DC output devices also comprises galvanometer (15), and galvanometer is electrically connected with the electric current output of the first isolation rectification assembly, the electric current output of showing to count power supply module respectively, each described DC output end is respectively equipped with an indicator lamp, described DC detecting device comprises the second Control Component (22), 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, described DC detecting device comprises the second alternating current input (N) and obtains alternating current after isolation rectification from the second alternating current input is that described battery charge and be examine to flow the second isolation rectification assembly (21) of assembly power supply by described second Control Component, and the second isolation rectification assembly is electrically connected with control loop.
2. one kind uses the method for the threephase cable phase determination device described in claim 1, 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 examined with three of DC detecting device in threephase cable phase determination device the direct current input flowing assembly be respectively electrically connected, start DC detecting device, enable DC output devices, direct current is exported by first in three DC output ends, the current conditions shown in observation DC detecting device three inspection stream assemblies, sub-the end of a thread that an inspection with electric current is flowed corresponding to assembly is identical with the galvanic sub-the end of a thread phase place of output, again successively by second in three DC output ends, 3rd exports direct current, record corresponding phase state.
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| Application Number | Priority Date | Filing Date | Title |
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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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| Application Number | Priority Date | Filing Date | Title |
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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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| Publication Number | Publication Date |
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| CN103792428A CN103792428A (en) | 2014-05-14 |
| CN103792428B true CN103792428B (en) | 2015-03-25 |
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| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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2013
- 2013-12-10 CN CN201310673469.7A patent/CN103792428B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Non-Patent Citations (4)
| Title |
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| 《单片机辅助电缆相位速测仪的研制》;陈兆骅;《科技信息》;20081231;第51页 * |
| 《核对电缆相位的两种方法》;张广科;《农村电工》;20001231;第10页 * |
| 《电力电缆相位的检测》;万里;《电气试验》;20010131;第63页 * |
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