CN102353846B - Measuring method for online monitoring of corona loss of power transmission line - Google Patents
Measuring method for online monitoring of corona loss of power transmission line Download PDFInfo
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- CN102353846B CN102353846B CN 201110162916 CN201110162916A CN102353846B CN 102353846 B CN102353846 B CN 102353846B CN 201110162916 CN201110162916 CN 201110162916 CN 201110162916 A CN201110162916 A CN 201110162916A CN 102353846 B CN102353846 B CN 102353846B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012544 monitoring process Methods 0.000 title claims abstract description 17
- 239000011104 metalized film Substances 0.000 claims abstract description 19
- 238000005070 sampling Methods 0.000 claims abstract description 18
- 239000010408 film Substances 0.000 claims abstract description 15
- 239000004020 conductor Substances 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 10
- 239000013307 optical fiber Substances 0.000 claims abstract description 4
- 230000005611 electricity Effects 0.000 claims description 32
- 238000009413 insulation Methods 0.000 claims description 6
- 239000011810 insulating material Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract 1
- 241001354243 Corona Species 0.000 description 31
- 238000005259 measurement Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000001465 metallisation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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Abstract
The invention discloses a measuring method for online monitoring of corona loss of a power transmission line. The method comprises the following steps of: wrapping a layer of thin metallized film with a certain length on the surface of a power transmission lead, wherein a conductive metal layer is arranged on one outward surface of the wrapped film and an insulated material layer is arranged on one surface of the wrapped film close to the power transmission lead; connecting a sampling resistor between the metal film layer and a power transmission divided conductor in parallel; converting the flowing leakage current into a voltage signal by the sampling resistor; transmitting the voltage signal to a computer on the ground through a wireless mode or an optical fiber; converting the voltage of the power transmission lead is converted through a voltage transformer or a voltage divider and transmitting the converted voltage to the computer; and calculating corona current, loss and other data by computer software. The measuring method disclosed by the invention is suitable for a non-load line and a load line or an alternating current line and a direct current line.
Description
Technical field:
The invention belongs to high voltage installation and experimental technique field, relate to a kind of method of using the metallization embrane method to measure the corona loss of AC and DC transmission line of electricity, especially a kind of metallization embrane method for AC and DC transmission line of electricity corona loss on-line monitoring.
Background technology:
For many years, people use the loss characteristic on high-tension bridge (as Schering bridge) measurement insulation system inside and the transmission line of electricity always.Bridge diagram can be measured the loss value under extremely low power factor.But, when the measurement of testing line segment, need reversal connection, electric bridge to be in the noble potential district.There is certain potential safety hazard in this measuring method inconvenient operation to the person and equipment, is difficult to implement for a long time the real-time online under the different weather conditions to be detected.
In addition, there are some kinds of power meter circuit to can be used to measure the typical low power factor corona loss that has now on the UHV (ultra-high voltage) test circuit, in the research of 500 KV coronas, adopted this method abroad.
In addition, the corona cage method also is one of common method of measuring corona loss, studies the coupled antenna method in addition in addition and measures the transmission line of electricity corona loss.
Domestic technical requirement of measuring according to corona loss has the dizzy loss of the special-purpose microcomputer controlled electro of development measuring instrument.
But for above-mentioned measuring method, they otherwise can only off-line measurement, or can only unloadedly measure.The measurement of power when very serious for wave form distortion under the low-power factor, be adopt bridge method, or the method for low power-factor wattmeter all do not consider influence of harmonic, therefore can produce significant error, adopt the low power-factor wattmeter of electromagnetic principle or measure corona loss with the electric bridge equilibrium principle, realize relatively difficulty of automatic record and data processing.
Up to the present, the corona loss of UHV TRANSMISSION LINES IN CHINA is measured and not carried out substantially, and the correlation computations of extra-high voltage corona loss is basic with reference to external related data, and this class can be with reference to measured data seldom, and is very incomplete.And both at home and abroad the meteorological condition of short, test experience of the time of this class extra-high voltage corona loss test duration also not thorough, cause test figure very incomplete, need further carry out long test and measurement research.
Summary of the invention:
The technical matters that the present invention solves is: a kind of measuring method of transmission line of electricity corona loss on-line monitoring is provided, has been applicable to unloaded and the measurement of loaded line corona loss, also be applicable to the loss measurement of AC and DC line corona.
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of measuring method of transmission line of electricity corona loss on-line monitoring is provided, at transmission of electricity split conductor coated outside layer of metal film, metalized film is made of insulation course and the outer field conductive layer of internal layer; Sampling resistor in parallel between described metalized film and transmission of electricity split conductor, the leakage current that sampling resistor will flow through on it is converted to voltage signal, and this voltage signal transfers to computing machine; The voltage of transmission of electricity split conductor also transfers to computing machine after voltage transformer (VT) or voltage divider conversion; Computing machine calculates corona current and corona loss data and on-line monitoring transmission line of electricity corona loss.
The leakage current that described sampling resistor will flow through is converted to voltage signal, this signal through wireless or Optical Fiber Transmission to ground computing machine.
Coated metal film on the described transmission pressure to be measured.
Described metalized film one side outwardly is the coat of metal of conduction, is insulating material film towards the one side of transmission pressure.
Described metalized film length is 0.1 meter-200 meters, 1 micron-5 millimeters of insulating material film thickness.
Described sampling resistor is electrically connected between the metalized film of transmission pressure and parcel.
Described sampling resistor value is 1 micro-ohm-10 megaohm.
The phase voltage of described transmission line of electricity is recorded by resitstance voltage divider, capacitive divider, RC divider, electromagnetic potential transformer or capacitance type potential transformer.
Described phase voltage records with high-voltage arm or the low-voltage arm of resitstance voltage divider, capacitive divider or RC divider.
The present invention is applicable to unloaded and the loaded line corona loss is measured, and also is applicable to the loss measurement of AC and DC line corona.
Description of drawings:
Fig. 1 is the conductor structure synoptic diagram of metalized film parcel of the present invention;
Fig. 2 is that structural drawing is measured in electronegative potential corona loss of the present invention;
Fig. 3 is that structural drawing is measured in noble potential corona loss of the present invention.
Wherein: 1 is the transmission of electricity split conductor; 2 is insulation course; 3 is conductive layer; 4 is the metalized film that wraps up on the lead; R
1Be sampling resistor; T is high-tension transformer; R
2Be high-tension resistive; C
1Be high-voltage capacitance; R
3Be low resistance; C
2Be low-voltage capacitance; D is silicon stack; K is switch.
Embodiment:
Below in conjunction with accompanying drawing the present invention is done and to describe in further detail:
Referring to Fig. 1-3, the conductor structure synoptic diagram of metalized film parcel as shown in Figure 1.A kind of measuring method of transmission line of electricity corona loss on-line monitoring, at transmission of electricity split conductor coated outside layer of metal film, metalized film is made of insulation course and the outer field conductive layer of internal layer; Sampling resistor in parallel between described metalized film and transmission of electricity split conductor, the leakage current that sampling resistor will flow through on it is converted to voltage signal, and this voltage signal transfers to computing machine; The voltage of transmission of electricity split conductor also transfers to computing machine after voltage transformer (VT) or voltage divider conversion; Computing machine calculates corona current and corona loss data and on-line monitoring transmission line of electricity corona loss.
At transmission line of electricity surface parcel layer of metal film, the insulation course of metalized film is attached on the transmission pressure, and conductive layer outwardly.
Coated metal film on the described transmission pressure to be measured.Described metalized film one side outwardly is the coat of metal of conduction, is insulating material film towards the one side of transmission pressure.
Described metalized film length is 0.1 meter-200 meters, 1 micron-5 millimeters of insulating material film thickness.Described sampling resistor is electrically connected between the metalized film of transmission pressure and parcel.Described sampling resistor value is 1 micro-ohm-10 megaohm.The phase voltage of described transmission line of electricity is recorded by resitstance voltage divider, capacitive divider, RC divider, electromagnetic potential transformer or capacitance type potential transformer.Described phase voltage records with high-voltage arm or the low-voltage arm of resitstance voltage divider, capacitive divider or RC divider.
Fig. 2 and Fig. 3 are corona loss measuring method synoptic diagram.The method both can have been measured the transmission line of alternation current also can measure DC power transmission line, the circuit phase voltage can be recorded by high-voltage arm or the low-voltage arm of RC divider, the voltage signal that measures reaches computing machine through wireless or optical fiber, the corona leakage current is then recorded by film place sampling resistor, utilizes software to calculate corona loss behind measuring voltage and electric current.
Above content is to further describing that the present invention does in conjunction with concrete preferred implementation; can not assert that the specific embodiment of the present invention only limits to this; for the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine scope of patent protection by claims of submitting to.
Claims (7)
1. the measuring method of a transmission line of electricity corona loss on-line monitoring is characterized in that: at transmission of electricity split conductor coated outside layer of metal film, metalized film is made of insulation course and the outer field conductive layer of internal layer; Sampling resistor in parallel between described metalized film and transmission of electricity split conductor, the leakage current that sampling resistor will flow through on it is converted to voltage signal, and this voltage signal transfers to computing machine; The voltage of transmission of electricity split conductor also transfers to computing machine after voltage transformer (VT) or voltage divider conversion; Computing machine calculates corona current and corona loss data and on-line monitoring transmission line of electricity corona loss.
2. the measuring method of transmission line of electricity corona loss on-line monitoring according to claim 1, it is characterized in that: the leakage current that described sampling resistor will flow through is converted to voltage signal, this signal through wireless or Optical Fiber Transmission to ground computing machine.
3. the measuring method of transmission line of electricity corona loss on-line monitoring according to claim 1, it is characterized in that: described metalized film length is 0.1 meter-200 meters, 1 micron-5 millimeters of insulating material film thickness.
4. the measuring method of transmission line of electricity corona loss on-line monitoring according to claim 1, it is characterized in that: described sampling resistor is electrically connected between the metalized film of transmission pressure and parcel.
5. the measuring method of transmission line of electricity corona loss on-line monitoring according to claim 1, it is characterized in that: described sampling resistor value is 1 micro-ohm-10 megaohm.
6. the measuring method of transmission line of electricity corona loss on-line monitoring according to claim 1, it is characterized in that: the phase voltage of described transmission line of electricity is recorded by resitstance voltage divider, capacitive divider, RC divider, electromagnetic potential transformer or capacitance type potential transformer.
7. as the measuring method of transmission line of electricity corona loss on-line monitoring as described in the claim 6, it is characterized in that:
Described phase voltage records with high-voltage arm or the low-voltage arm of resitstance voltage divider, capacitive divider or RC divider.
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| CN 201110162916 CN102353846B (en) | 2011-06-17 | 2011-06-17 | Measuring method for online monitoring of corona loss of power transmission line |
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| CN 201110162916 CN102353846B (en) | 2011-06-17 | 2011-06-17 | Measuring method for online monitoring of corona loss of power transmission line |
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| CN102353846A CN102353846A (en) | 2012-02-15 |
| CN102353846B true CN102353846B (en) | 2013-07-10 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048548B (en) * | 2012-12-12 | 2015-05-20 | 中国电力科学研究院 | Corona loss testing system and method of molded wire |
| CN105116233B (en) * | 2015-08-18 | 2018-01-16 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Forecasting Methodology is lost in a kind of straight-flow system |
| CN106353577B (en) * | 2016-08-19 | 2020-04-17 | 中国电力科学研究院 | Direct-current voltage measuring system and method based on wireless transmission |
| CN106443206B (en) * | 2016-10-24 | 2023-10-20 | 广州供电局有限公司 | Method and device for measuring electric field intensity on surface of high-voltage wire |
| CN110376476B (en) * | 2019-07-25 | 2022-06-10 | 云南电网有限责任公司电力科学研究院 | Passive self-starting leakage monitoring and positioning system and method based on intelligent lead |
| CN111562426A (en) * | 2020-05-18 | 2020-08-21 | 厦门合立道工程设计集团股份有限公司 | Quick judgment method for safe voltage drop of building electric direct current line conductor |
| CN113945765B (en) * | 2021-11-02 | 2023-09-19 | 国网福建省电力有限公司检修分公司 | Corona loss assessment method for extra-high voltage alternating current transmission line |
| CN115616302B (en) * | 2022-09-27 | 2024-02-13 | 国网江苏省电力有限公司南通供电分公司 | Method and device for collecting and detecting charge and potential of insulating layer of direct-current lead |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049229A (en) * | 1989-07-31 | 1991-02-13 | 三井石油化学工业株式会社 | Apparatus for monitoring degradation of insulation of electrical installation |
| CN1131278A (en) * | 1994-10-04 | 1996-09-18 | Abb管理有限公司 | Local discharge pulse sensor for coupled high voltage alive equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01191071A (en) * | 1988-01-27 | 1989-08-01 | Toshiba Corp | Monitoring method for rotary electric machine |
| JPH03162683A (en) * | 1989-11-20 | 1991-07-12 | Sumitomo Electric Ind Ltd | Method for diagnosing deterioration of electric power cable |
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- 2011-06-17 CN CN 201110162916 patent/CN102353846B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049229A (en) * | 1989-07-31 | 1991-02-13 | 三井石油化学工业株式会社 | Apparatus for monitoring degradation of insulation of electrical installation |
| CN1131278A (en) * | 1994-10-04 | 1996-09-18 | Abb管理有限公司 | Local discharge pulse sensor for coupled high voltage alive equipment |
Non-Patent Citations (2)
| Title |
|---|
| JP平1-191071A 1989.08.01 |
| JP平3-162683A 1991.07.12 |
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Inventor after: Luo Yongfen Inventor after: Zhang Yuanbin Inventor after: Zhang Qi Inventor after: Liu Haicang Inventor after: Wu Jian Inventor after: Bai Xiaochuan Inventor after: Wang Guoli Inventor after: Liu Lei Inventor before: Luo Yongfen Inventor before: Zhang Yuanbin Inventor before: Zhang Qi Inventor before: Liu Haicang Inventor before: Wu Jian Inventor before: Bai Xiaochuan |
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Effective date of registration: 20171130 Address after: 710049 Xianning West Road, Shaanxi, China, No. 28, No. Co-patentee after: China South Power Grid International Co.,Ltd. Patentee after: XI'AN JIAOTONG University Address before: 710049 Xianning West Road, Shaanxi, China, No. 28, No. Patentee before: Xi'an Jiaotong University |