CN110221156A - A kind of separation of high voltage power cable leakage current and detection method - Google Patents
A kind of separation of high voltage power cable leakage current and detection method Download PDFInfo
- Publication number
- CN110221156A CN110221156A CN201910553810.2A CN201910553810A CN110221156A CN 110221156 A CN110221156 A CN 110221156A CN 201910553810 A CN201910553810 A CN 201910553810A CN 110221156 A CN110221156 A CN 110221156A
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- phase
- voltage
- leakage current
- head end
- cable
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/146—Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a kind of separation of high voltage power cable leakage current and detection methods, comprising the following steps: S1: installs current transformer and voltage transformer respectively in the head end of each phase of three-phase electrical cable and end in advance；S2: for each phase of three-phase electrical cable, the terminal voltage of the head end voltage and the terminal voltage transformer measurement by the phase that are obtained by the head end voltage transformer measurement of the phase is obtained；S3: experimental voltage is risen to 1.06 times of measured object rated operational voltage；S4: switching phase, change-over switch read rereading respectively；S5: the larger value therein is intercepted as tested Leakage Current value.The present invention is easy to understand the aging conditions of electrical cables, avoids improving the efficiency of detection, while the step of reducing detection because of the case where cable aging causes power grid accident generation, ensure that the result of detection by carrying out current separation and detection to power cable.
Description
Technical field
The present invention relates to high voltage power cable technical field more particularly to a kind of high voltage power cable leakage current separation and
Detection method.
Background technique
Power cable is the cable for being used for transmission and distributing electric energy, and power cable is usually used in Urban Underground power grid, power station
Lead line, industrial and mining enterprises' in-line power and mistake river sea submarine transmission line, in power circuit, cable proportion just gradually increases
Add.Power cable is in the basic routing line of electric system to the cable product for transmitting and distributing high-power power, including 1-
500KV and more than various voltage class, the power cable of various insulation, the basic structure of power cable by core (conductor),
Insulating layer, shielded layer and four part of protective layer composition, power cable have land occupation less, high reliablity, with to super-pressure, great Rong
Measure the more favorable condition of development, the advantages that distribution capacity is larger, maintenance workload is few, motor possibility is small.
The growth of China's economic continuously and healthily provides the huge market space for cable products, and Chinese market is strong
Temptation, so that sight is all focused on Chinese market by the world, in short decades of reforming and opening up to the outside world, Chinese cable manufacturing industry institute
The huge production capacity formed allows the world to regard with special esteem, and wires and cables industry is the second largest row that China is only second to automobile industry
Industry, product variety satisfaction rate and domestic market share are more than 90%.Worldwide, Chinese gross output value of wire and cable has been
More than the U.S., become the first big countries producing electric wires and cables in the world.With the rapid development of china's wire and cable industry, enterprise is increased newly
Industry quantity constantly rises, and industry overall technology level is largely increased, and Chinese cable manufacturing industry is formed by huge production energy
Power allows the world to regard with special esteem.With China electric power industry, data communication industry, urban track traffic industry, car industry and shipbuilding etc.
The continuous expansion of industry size, the demand to wire and cable will also increase rapidly, and there are also huge development for the following wire and cable industry
Potentiality.
The operating experience of a large amount of XLPE cables shows that cable line fault is to cause the major reason of power grid accident, cable
After coming into operation, electric field action, mechanism, heat effect not only will receive, the influence of environmental factor is also suffered from, at these
Cable is made to be easy to happen aging under the collective effect of factor, heat ageing, which occurs, for cable leads to the probability that cable run breaks down
It greatly increases, after cable breaks down, needs that the electric current of leakage is shunted and detected, still, existing detection method
Not only detection effect is poor, but also time-consuming and laborious, there is significant limitation, for this purpose, we have proposed a kind of high voltage power cables to let out
Electric leakage flow separation and detection method solve the above problems.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of high voltage power cable proposed is let out
Flow separation of leaking electricity and detection method.
To achieve the goals above, present invention employs following technical solutions:
A kind of separation of high voltage power cable leakage current and detection method, comprising the following steps:
S1: current transformer and mutual induction of voltage are installed respectively in the head end of each phase of three-phase electrical cable and end in advance
Device；
S2: for each phase of three-phase electrical cable, the head end obtained by the head end voltage transformer measurement of the phase is obtained
The terminal voltage of voltage and the terminal voltage transformer measurement by the phase；
S3: experimental voltage is risen to 1.06 times of measured object rated operational voltage；
S4: switching phase, change-over switch read rereading respectively；
S5: the larger value therein is intercepted as tested Leakage Current value.
Preferably, in the S2, each corresponding head end electric current value of three-phase electrical cable, end current value and its is right
The head end voltage and terminal voltage answered are synchro measure values.
Preferably, in the S4, change-over switch is connected with zero curve, and the Leakage Current between tester center line and shell carries out
Sampling, change-over switch are connected with phase line, and tester samples the Leakage Current between phase line and shell.
The present invention, when needing to carry out power cable current distributing and detection, in advance in each phase of three-phase electrical cable
Head end and end current transformer and voltage transformer are installed respectively, then be directed to three-phase electrical cable each phase, obtain
The end electricity of the head end voltage and the terminal voltage transformer measurement by the phase that obtained by the head end voltage transformer measurement of the phase
It presses, in early experimentation remittance, experimental voltage is raised to 1.06 times or 1.1 times of measured object rated operational voltage, switches phase,
Change-over switch reads rereading respectively, in change-over switch, when change-over switch is contacted with zero curve, what tester was sampled
The Leakage Current between middle line and shell, when change-over switch and phase line are connected, test be phase line and outer casing member leakage electricity
Stream, finally using the larger value as tested Leakage Current value, the present invention is convenient by carrying out current separation and detection to power cable
The aging conditions for understanding electrical cables avoid improving the efficiency of detection, together because of the case where cable aging causes power grid accident generation
When the step of reducing detection, ensure that the result of detection.
Specific embodiment
Seat of the present invention is further explained in conjunction with the present embodiment.
A kind of separation of high voltage power cable leakage current and detection method, comprising the following steps:
S1: current transformer and mutual induction of voltage are installed respectively in the head end of each phase of three-phase electrical cable and end in advance
Device, three-phase alternating current are a kind of transporting patterns of electric energy, three-phase alternating-current supply, are that frequency is identical, amplitude is equal, phase by three
The successively power supply of 120 ° of mutual deviation of exchange potential composition, there are many purposes of three-phase alternating current, most exchange electricity consumption in industry
Equipment；
S2: for each phase of three-phase electrical cable, the head end obtained by the head end voltage transformer measurement of the phase is obtained
The terminal voltage of voltage and the terminal voltage transformer measurement by the phase, in S2, each corresponding head of three-phase electrical cable
End current value, end current value head end voltage corresponding with its and terminal voltage are synchro measure value, voltage transformer transformation electricity
The purpose of pressure is primarily used to power to measuring instrumentss and protective relaying device, for measuring the voltage, power and electricity of route
Can, or for expensive equipment, motor and the transformer in line failure in protection circuit, avoid expensive equipment, electricity
Machine and transformer damage；
S3: experimental voltage is risen to 1.06 times of measured object rated operational voltage；
S4: switching phase, change-over switch read rereading respectively, and in S4, change-over switch K is connected with zero curve, tester
Leakage Current between center line and shell is sampled, and change-over switch K is connected with phase line, and tester is to letting out between phase line and shell
Dew electric current is sampled；
S5: the larger value therein is intercepted as tested Leakage Current value.
In present invention, it is desirable to when carrying out current distributing and detection to power cable, in advance in each of three-phase electrical cable
Current transformer and voltage transformer are installed in the head end of phase and end respectively, are then directed to each phase of three-phase electrical cable, obtain
It must be by the end for the head end voltage and the terminal voltage transformer measurement by the phase that the head end voltage transformer measurement of the phase obtains
Experimental voltage during early experimentation converges, is raised to 1.06 times or 1.1 times of measured object rated operational voltage, switches phase by voltage
Position, change-over switch reads rereading respectively, and in change-over switch, when change-over switch is contacted with zero curve, tester is sampled
Be Leakage Current between middle line and shell, when change-over switch and phase line are connected, test be phase line and outer casing member leakage
Electric current, finally using the larger value as tested Leakage Current value.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (3)
1. a kind of high voltage power cable leakage current separation and detection method, which comprises the following steps:
S1: current transformer and voltage transformer are installed respectively in the head end of each phase of three-phase electrical cable and end in advance；
S2: for each phase of three-phase electrical cable, the head end voltage obtained by the head end voltage transformer measurement of the phase is obtained
With the terminal voltage of the terminal voltage transformer measurement by the phase；
S3: experimental voltage is risen to 1.06 times of measured object rated operational voltage；
S4: switching phase, change-over switch read rereading respectively；
S5: the larger value therein is intercepted as tested Leakage Current value.
2. a kind of high voltage power cable leakage current separation according to claim 1 and detection method, which is characterized in that institute
It states in S2, each corresponding head end electric current value, end current value head end voltage corresponding with its and the end of three-phase electrical cable
Holding voltage is synchro measure value.
3. a kind of high voltage power cable leakage current separation according to claim 1 and detection method, which is characterized in that institute
State in S4, change-over switch K is connected with zero curve, and the Leakage Current between tester center line and shell is sampled, change-over switch K and
Phase line is connected, and tester samples the Leakage Current between phase line and shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910553810.2A CN110221156A (en) | 2019-06-25 | 2019-06-25 | A kind of separation of high voltage power cable leakage current and detection method |
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| CN201910553810.2A CN110221156A (en) | 2019-06-25 | 2019-06-25 | A kind of separation of high voltage power cable leakage current and detection method |
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| CN110221156A true CN110221156A (en) | 2019-09-10 |
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| CN201910553810.2A Pending CN110221156A (en) | 2019-06-25 | 2019-06-25 | A kind of separation of high voltage power cable leakage current and detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426981A (en) * | 2020-04-27 | 2020-07-17 | 江苏图腾电气科技有限公司 | Fault detection method for anti-creeping current power cabinet |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102468676A (en) * | 2010-11-05 | 2012-05-23 | 三美电机株式会社 | Battery voltage monitoring circuit |
| CN103782472A (en) * | 2011-06-22 | 2014-05-07 | 雷诺股份公司 | System and method for compensating a battery charger installed in a vehicle |
| CN105548874A (en) * | 2015-12-31 | 2016-05-04 | 北京四方继保自动化股份有限公司 | An intelligent switch state comprehensive online monitoring and fault diagnosis device |
| CN106291115A (en) * | 2016-10-27 | 2017-01-04 | 哈尔滨理工大学 | Distance power cable insulation impedance on-line monitoring method |
| CN206945878U (en) * | 2017-07-17 | 2018-01-30 | 郭佳睿 | A kind of line electrical leakage detection means |
| US20180149690A1 (en) * | 2016-07-13 | 2018-05-31 | Chengli Li | Ground fault circuit interrupter |
| CN109142958A (en) * | 2018-10-25 | 2019-01-04 | 广东电网有限责任公司 | Electric leakage detection method |
| CN208369295U (en) * | 2018-07-24 | 2019-01-11 | 江苏轶一电力科技有限公司 | A kind of high-tension cable partial discharge monitoring device taking electricity based on CT |
-
2019
- 2019-06-25 CN CN201910553810.2A patent/CN110221156A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102468676A (en) * | 2010-11-05 | 2012-05-23 | 三美电机株式会社 | Battery voltage monitoring circuit |
| CN103782472A (en) * | 2011-06-22 | 2014-05-07 | 雷诺股份公司 | System and method for compensating a battery charger installed in a vehicle |
| CN105548874A (en) * | 2015-12-31 | 2016-05-04 | 北京四方继保自动化股份有限公司 | An intelligent switch state comprehensive online monitoring and fault diagnosis device |
| US20180149690A1 (en) * | 2016-07-13 | 2018-05-31 | Chengli Li | Ground fault circuit interrupter |
| CN106291115A (en) * | 2016-10-27 | 2017-01-04 | 哈尔滨理工大学 | Distance power cable insulation impedance on-line monitoring method |
| CN206945878U (en) * | 2017-07-17 | 2018-01-30 | 郭佳睿 | A kind of line electrical leakage detection means |
| CN208369295U (en) * | 2018-07-24 | 2019-01-11 | 江苏轶一电力科技有限公司 | A kind of high-tension cable partial discharge monitoring device taking electricity based on CT |
| CN109142958A (en) * | 2018-10-25 | 2019-01-04 | 广东电网有限责任公司 | Electric leakage detection method |
Non-Patent Citations (2)
| Title |
|---|
| 蒋春旭: "电子产品抗电强度试验综述", 《电子世界》 * |
| 袁璐: "电气安全性能测试耐压测试系统研究", 《传感器世界》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111426981A (en) * | 2020-04-27 | 2020-07-17 | 江苏图腾电气科技有限公司 | Fault detection method for anti-creeping current power cabinet |
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Application publication date: 20190910 |
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