CN110286293A - A kind of self-energizing electric leakage monitoring method and system based on leakage current - Google Patents
A kind of self-energizing electric leakage monitoring method and system based on leakage current Download PDFInfo
- Publication number
- CN110286293A CN110286293A CN201910675114.9A CN201910675114A CN110286293A CN 110286293 A CN110286293 A CN 110286293A CN 201910675114 A CN201910675114 A CN 201910675114A CN 110286293 A CN110286293 A CN 110286293A
- Authority
- CN
- China
- Prior art keywords
- electrode
- electricity
- leakage
- leakage current
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The embodiment of the present application discloses a kind of self-energizing electric leakage monitoring method based on leakage current, comprising: step 1: the selection of electrode；Step 2: the arrangement of electrode；Step 3: the collected voltage U of two electrode of electric energy collection device is calculated12；Step 4: the energy P that self-energizing electric leakage monitoring system is taken out is calculated；The method is applied to a kind of self-energizing electric leakage monitoring system based on leakage current, the system comprises: electric energy collection device 1, isolating transformer 2, straightening and filtering unit 3 and monitoring device 4；The electric energy collection device includes electrode I 5 and electrode II 6, acquire the leakage current signal of power equipment or transmission line of electricity, the electric energy collection device is connected with the primary side of isolating transformer, by the collected alternating current of electric energy collection device after the processing of isolating transformer and straightening and filtering unit, stable driving power is provided for monitoring device.
Description
Technical field
This application involves the power taking technology field of electric system on-line monitoring more particularly to a kind of asking for based on leakage current
The monitoring method that can leak electricity and system.
Background technique
China's low-voltage network electric leakage Frequent Accidents, the electric leakage accidents such as electrical fire, electrical equipment damage and human electric shock
Production and living, life-threatening property safety are seriously affected.The method of existing detection leakage current has very much, such as small resistance
Sampling method, Hall sensor electric current testing, current transformer mensuration, current comparator etc..Wherein, more common small electricity
Resistance sampling method is one resistance of series connection in former circuit, voltage signal is converted by current signal, by directly measuring resistance
Voltage can obtain leakage current signal, and such method is easy, economical, but can circuit actual conditions be brought with interference, bring
Measurement error；Hall sensor electric current testing, current transformer mensuration, current comparator as indirect type measurement method,
Advantage is isolated measurement current signal, does not need to access original circuit and measures, and reduces measuring system to the volume of circuit
Outer interference can effectively reduce measurement error.Current main indirect type measurement method is Hall sensor electric current testing,
Realize current detecting using Hall effect, but it is influenced by temperature change, and it is big to generate interference, measure weak current remolding sensitivity compared with
It is low, it is unsuitable for detecting weak current.
Low-voltage leakage monitoring technology is mainly to install based on traditional earth leakage protective device at present, and sensitivity is low, easy misses
Movement, causes Frequent trip, influences power supply reliability.Earth leakage protective device is operated normally in order to avoid unpredictable factor
Interference, earth leakage protective monitoring device are come into being.Earth leakage protective monitoring device is applied in electric energy use process to route
Electric current safe operation examinations, are capable of the accident that measure against electrical leakage causes, but product-level earth leakage protective monitoring device at present,
It is mainly powered using external power supply, there is electric shock and equipment malfunction because of external power supply electric leakage initiation and make risk, while external electrical
From body, there are certain losses.
In recent years, with the continuous development of intelligent power grid technology, intelligence equipment in power equipment using more prevalent,
And it is power supply power supply problem that on-line monitoring equipment etc., which intelligently equips the difficult point that must be solved, therefore, power supply be designed in order to
Focus of attention.The self-powered mode of mainstream has traditional CT that electricity, capacitance partial pressure is taken to take electricity, laser that electricity, photovoltaic cell is taken to take at present
Electricity, ultrasonic wave take electricity and microwave radiation formula to take electricity etc..Traditional CT way to take power energy conversion rate is high, easily takes electricity, but takes energy
It is unstable；Capacitance partial pressure takes electricity due to lacking electrical isolation, and there are some potential safety problemss；Laser takes electricity output precision height, supplies
It can stablize, but higher cost；Photovoltaic cell is a kind of renewable energy, does not generate greenhouse gases, but the shadow vulnerable to external environment
It rings, can not achieve lasting energy supply；It is safer reliable that ultrasonic wave takes electricity, but equipment cost is higher, and turn of ultrasonic wave electric energy
It is lower to change rate；Microwave radiation formula takes electricity to can be realized remote-wireless transmission of electricity, and directionality is good, but transmission efficiency is low, at high cost.
Constantly bringing forth new ideas and improving with technology, electricity getting device and method are also being continuously improved, wherein Patent No.
201810571411.4 a kind of high power capacity electricity getting device and method, the derided capacitors of proposition takes electrical method to remove PT, adopts
Electricity is taken with capacitor, and with super capacitor or batteries to store energy, this method is in addition to needing to be isolated power-supply circuit and follow-up work circuit
Outside, it is also influenced by many factors such as temperature, humidity and stray capacitances, and output power is limited.Patent No.
A kind of 201910138276.9 transmission line of electricity sensing electricity getting device based on Rogowski coil is high part using mutual inductor principle
Energy on pressure conducting wire is converted into power output, and this method is difficult to that function is smoothly output in the biggish current range of transmission line of electricity
When rate, usual transmission line of electricity electric current are smaller, output power is insufficient, and when transmission line of electricity electric current is larger, output power is excessively high, takes Denso
It is serious to set fever.
In summary, on the one hand, electric leakage monitoring device mainly uses external power supply to power at present, exists because external power supply leaks
Risk is made in the electric shock and equipment malfunction that electricity causes, while there are certain losses for external power supply itself；On the other hand, it monitors on-line
The power supply power supply problem that equipment etc. is intelligently equipped, be utilized on transmission line of electricity takes electricity more in the prior art.It is provided by the present application
A kind of self-energizing based on leakage current leaks electricity monitoring method, and monitoring electric leakage and equipment self-powered are combined, by power equipment or
After the leakage current signal processing of transmission line of electricity, as monitoring device starting power supply, it is not only energy saving but effectively prevent because outside
Risk is made in the electric shock and equipment malfunction for connecing source-drain initiation.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the present invention provides a kind of self-energizing leakage based on leakage current
Pyroelectric monitor method and system are powered without external power supply, are capable of providing stable dc power supply as monitoring device power supply.
The application's in a first aspect, provide a kind of self-energizing electric leakage monitoring method based on leakage current, which comprises
Step 1: the selection of electrode；
Different according to monitoring device type, electrode can be bar shaped, arc and annular three kinds of shapes；The electrode has preferable
Corrosion resistance, electric conductivity, compression strength, and with excellent welding performance；
Strip electrode selects formula as follows:
Wherein, l is electrode length, and I is the leakage current of power equipment or transmission line of electricity, RSAnd XSFor isolating transformer short circuit
Impedance, RLFor monitoring device resistance, P1For energy needed for electric leakage monitoring system, ρ1For the resistivity of electrode；
Annular or arc-shaped electrode selection formula are as follows:
Wherein, the width a of annular electrode, the thickness t of annular electrode, the electricalresistivityρ of electrode1It is known that r is annular electrode
Radius；
Step 2: the arrangement of electrode；
When power equipment or transmission line of electricity leak electricity, leakage current will form one when spreading from electrical body to surrounding medium
Fixed Potential distribution, the electrode I and electrode II of the electric energy collection device are under different Potential distributions, form potential difference,
Leakage current signal is acquired, energy needed for extracting monitoring device starting；
Electrode I and leakage point of electricity distance are r1, electrode II and leakage point of electricity distance are r2, according to current spread principle, to guarantee two
The electric energy that electrode takes out is sufficiently large, when arranging two electrodes, r1It should be as close as possible to leakage point of electricity, r2As far as possible far from leakage point of electricity, r is first fixed1
Position, r2Determination formula it is as follows:
Wherein, ρ is the resistivity of current spread medium；
Step 3: the collected voltage U of two electrode of electric energy collection device is calculated12；
Step 4: the energy P that self-energizing electric leakage monitoring system is taken out is calculated；
The electricalresistivityρ of leakage current dispersive medium, leakage current I, two resistance between electrode R, electrode spacing leakage point of electricity distance r1And r2,
Load RLIt is known that short-circuit impedance RS, XSIt can be found out by short-circuit test, pass through the available self-energizing electric leakage monitoring system of above formula
The output power of system.
The second aspect of the application, the method are applied to the self-energizing electric leakage monitoring system based on leakage current, the system
System includes: electric energy collection device, isolating transformer, straightening and filtering unit and monitoring device.The electric energy collection device includes electricity
Pole I and electrode II, for acquiring the leakage current signal of power equipment or transmission line of electricity, the electric energy collection device with transformation is isolated
The primary side of device is connected, the collected alternating current of electric energy collection device after isolating transformer, straightening and filtering unit,
Stable driving power, the secondary side of the isolating transformer, the straightening and filtering unit and the prison are provided for monitoring device
It is successively in parallel to survey device.
The input terminal of the electric energy collection device is leakage current in medium (the earth, trees, steel tower, cement pole, water etc.) table
Voltage caused by face, output end are connected with the primary side of the isolating transformer, the secondary side of the isolating transformer, described
Straightening and filtering unit and the monitoring device are successively in parallel.
The application's the utility model has the advantages that the application has implementation method simple, the features such as strong applicability, and proposes based on leakage
The self-energizing electric leakage monitoring method of electric current realizes the nothing of monitoring device using itself of power equipment or transmission line of electricity leakage current
From starting, energy is saved, while can avoid the risk that device external power supply generates electric leakage electric shock.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without any creative labor,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of flow chart of self-energizing electric leakage monitoring method based on leakage current provided by the present application；
Fig. 2 is that a kind of self-energizing electric leakage monitoring system based on leakage current provided by the present application takes energy using strip electrode
Structural schematic diagram；
Fig. 3 is that a kind of self-energizing electric leakage monitoring system based on leakage current provided by the present application takes energy using arc-shaped electrode
Structural schematic diagram；
Fig. 4 is that a kind of self-energizing electric leakage monitoring system based on leakage current provided by the present application takes energy using annular electrode
Structural schematic diagram；
Fig. 5 is a kind of equivalent circuit diagram of self-energizing electric leakage monitoring system based on leakage current provided by the present application；
Fig. 6 is a kind of simple equivalent circuit figure of self-energizing electric leakage monitoring system based on leakage current provided by the present application.
Specific embodiment
To keep the purposes, technical schemes and advantages of the application clearer, below in conjunction with the application specific embodiment and
Technical scheme is clearly and completely described in corresponding attached drawing.
It refering to fig. 1, is a kind of flow chart of the self-energizing electric leakage monitoring method based on leakage current provided by the present application, step
It is as follows:
The selection of electrode: S101 determines the resistance and size of electrode shape and electrode；
The arrangement of electrode: S102 determines the distance of two electrode distance leakage point of electricity；
S103 calculates the collected voltage U of two electrode of electric energy collection device12；
S104 calculates the energy P that self-energizing electric leakage monitoring system is taken out.
It is described for a kind of structural schematic diagram of self-energizing electric leakage monitoring system based on leakage current refering to Fig. 2, Fig. 3, Fig. 4
System includes: electric energy collection device 1, isolating transformer 2, straightening and filtering unit 3 and monitoring device 4.The electric energy collection device 1
Including electrode I 5 and electrode II 6, for acquiring the leakage current signal of power equipment or transmission line of electricity, the energy obtaining system is by electric energy
The collected alternating current of acquisition device provides stable driving power for monitoring device after isolation, rectifying and wave-filtering.
It is different according to monitoring device type, electrode of different shapes is selected, wherein annular electrode shown in Fig. 4 should be equipped with small open
Mouthful, it prevents electromagnetic induction from generating circulation, influences electrode performance.
The selection and arrangement of electrode I:
The size of electrode I and position are decided by that system needs electrode to collect great electric current.Leakage current I is with leakage point of electricity
Centered on, it is spread around on planar medium, when it is I' that system, which needs the collected electric current of electrode, there is following relational expression:
Wherein, S' is the contact area of electrode I and medium, and S is the diffusion area of leakage current, and I is leakage current.
The contact area of electrode I Yu medium can be obtained
Because the load impedance of energy obtaining system side is adopted much smaller than the transition resistance between electrode I and electrode II, electrode I
The electric current I' collected is most of after transition resistance shunts all to flow into system side, provides energy for monitoring device starting.
When two electrode arrangements, the selection close to the electrode I of leakage point of electricity is particularly important, directly determines that the electric current in system is big
It is small.After the completion of electrode I is arranged according to On The Current Value, further according to power needed for system, two interelectrode voltage values are calculated,
So that it is determined that the position of the electrode II far from leakage point of electricity, and the size of electrode II can influence and little taking for system.
The selection and arrangement of electrode II:
According to current spread principle, two inter-electrode voltages are acquired are as follows:
According to Ohm's law and current voltage distribution, two inter-electrode voltages are acquired are as follows:
It can be obtained by formula (1) (2):
The energy that system is taken out are as follows:
The energy that system is taken out enables P=5W, has starting monitoring device:
It is obtained by formula (3) (4):
Wherein, Z is system side impedance,If r1It is known that then r2Expression formula it is as follows:
In formula, electrode I and leakage point of electricity distance are r1, electrode II and leakage point of electricity distance are r2, according to current spread principle, it is
The electric energy for guaranteeing that two electrodes take out is sufficiently large, when arranging two electrodes, r1It should be as close as possible to leakage point of electricity, r2As far as possible far from leakage point of electricity；ρ
For the resistivity of current spread medium；I is the leakage current of power equipment or transmission line of electricity, RSAnd XSFor isolating transformer short circuit resistance
It is anti-, RLFor monitoring device resistance.
Meanwhile electrode resistance can be obtained by formula (3) (4) are as follows:
Referring to Fig.2, strip electrode resistance expression formula are as follows:Wherein ρ1For the resistivity of electrode, l is electrode length,
S is the cross-sectional area of electrode；
Acquire electric current when, electrode is longer, can collected energy it is more, so the cross-sectional area S value of electrode here
It much smaller than electrode length value, can be ignored, R is approximately equal to ρ1l。
II length of electrode can be obtained are as follows:
Wherein, l is II length of electrode, and I is the leakage current of power equipment or transmission line of electricity, RSAnd XSIt is short for isolating transformer
Roadlock is anti-, RLFor monitoring device resistance, ρ1For the resistivity of electrode.
Refering to Fig. 4, to ensure to take out sufficiently large electric energy, when I position of annular electrode is fixed, II Ying Jinke of annular electrode
It can be far from electrode I, so the radius and resistance of annular electrode II are much larger than the radius and resistance of annular electrode I, annular electrode II
Resistance expression formula are as follows:
And then acquire: the radius of annular electrode II
Wherein, the width a of annular electrode II, the thickness t of annular electrode II, the electricalresistivityρ of electrode1It is known that r is annular electro
The radius of pole II.
It is the equivalent circuit diagram of Fig. 2-4 refering to Fig. 5, in figure, leakage current I is equivalent to current source；Two resistance between electrode R are
Current source internal resistance；R1, X1For the resistance and leakage reactance of 2 first winding of isolating transformer；R2, X2For 2 secondary winding of isolating transformer
Resistance and leakage reactance；Rm, XmFor the resistance and induction reactance of 2 excitation winding of isolating transformer；RLFor the load of monitoring device 4；Wherein rectification filter
The resistance very little of wave apparatus 3 can be neglected.
It is the equivalent simplified circuit figure of Fig. 5, R in figure refering to Fig. 6SFor short-circuit resistance, XSFor short-circuit reactance, and RS=R1+
R2, XS=X1+X2。
The output power of self-energizing electric leakage monitoring system is derived below:
Electrode I and leakage point of electricity distance are r1, the current potential on electrode I at this time are as follows:
Electrode II and leakage point of electricity distance are r2, the current potential on electrode II at this time are as follows:
Two inter-electrode voltage U12Are as follows:
As can be seen from the above equation, sufficiently large for the voltage that ensures that electrode takes out, then U1It is as big as possible, U2It should be as small as possible, therefore cloth
When setting two electrodes, r1It should be as far as possible close to leakage point of electricity, r2As far as possible far from leakage point of electricity.
The electric current of system side are as follows:
System output power are as follows:
The electricalresistivityρ of leakage current dispersive medium, leakage current I, two resistance between electrode R, electrode spacing leakage point of electricity distance r1And r2,
Load RLIt is known that short-circuit impedance RS, XSIt can be found out by short-circuit test, pass through the available self-energizing electric leakage monitoring system of above formula
The output power of system.
Claims (3)
- The monitoring method 1. a kind of self-energizing based on leakage current leaks electricity, which is characterized in that the described method includes:Step 1: the selection of electrode；Different according to monitoring device type, electrode can be bar shaped, arc and annular three kinds of shapes；The electrode has preferable anti- Corrosivity, electric conductivity, compression strength, and with excellent welding performance；Strip electrode selects formula as follows:Wherein, l is electrode length, and I is the leakage current of power equipment or transmission line of electricity, RSAnd XSFor isolating transformer short-circuit impedance, RLFor monitoring device resistance, P1For energy needed for electric leakage monitoring system, ρ1For the resistivity of electrode；Annular or arc-shaped electrode selection formula are as follows:Wherein, the width a of annular electrode, the thickness t of annular electrode, the electricalresistivityρ of electrode1It is known that r is the radius of annular electrode；Step 2: the arrangement of electrode；When power equipment or transmission line of electricity leak electricity, leakage current will form certain when spreading from electrical body to surrounding medium Potential distribution, the electrode I and electrode II of the electric energy collection device are under different Potential distributions, form potential difference, acquisition Leakage current signal, energy needed for extracting monitoring device starting；Electrode I and leakage point of electricity distance are r1, electrode II and leakage point of electricity distance are r2, according to current spread principle, to guarantee two electrodes The electric energy of taking-up is sufficiently large, when arranging two electrodes, r1It should be as close as possible to leakage point of electricity, r2As far as possible far from leakage point of electricity, r is first fixed1Position It sets, r2Determination formula it is as follows:Wherein, ρ is the resistivity of current spread medium；Step 3: the collected voltage U of two electrode of electric energy collection device is calculated12；Step 4: the energy P that self-energizing electric leakage monitoring system is taken out is calculated；The electricalresistivityρ of leakage current dispersive medium, leakage current I, two resistance between electrode R, electrode spacing leakage point of electricity distance r1And r2, load RLIt is known that short-circuit impedance RS, XSIt can be found out by short-circuit test, pass through the available self-energizing electric leakage monitoring system of above formula Output power.
- The monitoring system 2. a kind of self-energizing based on leakage current leaks electricity, which is characterized in that the system comprises: electric energy collection device (1), isolating transformer (2), straightening and filtering unit (3) and monitoring device (4)；The electric energy collection device include electrode I (5) and Electrode II (6), the leakage current signal of acquisition power equipment or transmission line of electricity, the one of the electric energy collection device and isolating transformer Secondary side series connection, by the collected alternating current of electric energy collection device after the processing of isolating transformer and straightening and filtering unit, Stable driving power is provided for monitoring device.
- The monitoring system 3. a kind of self-energizing based on leakage current according to claim 2 leaks electricity, which is characterized in that it is described every Secondary side, the straightening and filtering unit (3) and the monitoring device (4) from transformer (2) is successively in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910675114.9A CN110286293B (en) | 2019-07-25 | 2019-07-25 | Self-energy-taking leakage monitoring method and system based on leakage current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910675114.9A CN110286293B (en) | 2019-07-25 | 2019-07-25 | Self-energy-taking leakage monitoring method and system based on leakage current |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110286293A true CN110286293A (en) | 2019-09-27 |
| CN110286293B CN110286293B (en) | 2021-04-20 |
Family
ID=68022426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910675114.9A Active CN110286293B (en) | 2019-07-25 | 2019-07-25 | Self-energy-taking leakage monitoring method and system based on leakage current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110286293B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112491007A (en) * | 2020-11-23 | 2021-03-12 | 云南电网有限责任公司临沧供电局 | Leakage current protection, monitoring and early warning system and method |
| CN114280501A (en) * | 2021-12-27 | 2022-04-05 | 重庆金山医疗技术研究院有限公司 | High-frequency leakage current detection method and device for high-frequency electrotome |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060087322A1 (en) * | 2004-10-21 | 2006-04-27 | Mccollough Norman D Jr | Method and apparatus for a remote electric power line conductor faulted circuit current, conductor temperature, conductor potential and conductor strain monitoring and alarm system. |
| JP2008218854A (en) * | 2007-03-07 | 2008-09-18 | Epson Imaging Devices Corp | Light quantity detecting circuit, electrooptical device, and electronic equipment |
| CN101436792A (en) * | 2008-12-09 | 2009-05-20 | 华中科技大学 | Electricity-fetching method for high voltage overhead transmission line on-line monitoring device |
| JP2009528014A (en) * | 2006-02-21 | 2009-07-30 | クリント マッコーウェン、 | Energy collection |
| CN102061940A (en) * | 2010-11-30 | 2011-05-18 | 重庆梅安森科技股份有限公司 | Feed transducer for detecting differential mode leakage current of power cable |
| US20110234019A1 (en) * | 2007-08-17 | 2011-09-29 | Tmms Co., Ltd. | Method and device for transporting, distributing and managing electrical energy by remote longitudinal coupling in near field between electric dipoles |
| CN202026161U (en) * | 2011-04-19 | 2011-11-02 | 辽宁省电力有限公司鞍山供电公司 | High-tension electric field power taking device |
| CN102426858A (en) * | 2011-11-30 | 2012-04-25 | 中国科学院微电子研究所 | Method and system for detecting leakage current of storage units |
| CN203151236U (en) * | 2012-09-29 | 2013-08-21 | 吉林省电力有限公司长春供电公司 | Cable line arrester on-line monitoring system power supply |
| CN103513148A (en) * | 2013-09-11 | 2014-01-15 | 苏州萃智新技术开发有限公司 | Electric leakage warning device |
| CN204794380U (en) * | 2015-06-09 | 2015-11-18 | 国网山东济南市历城区供电公司 | Ring -opening formula high pressure induction electricity -taking and current monitoring device |
| CN204982982U (en) * | 2015-08-31 | 2016-01-20 | 中国环境科学研究院 | Signal acquisition device |
| CN105738688A (en) * | 2016-05-09 | 2016-07-06 | 国网浙江省电力公司杭州供电公司 | Electrical inspection and locking device based on leakage current of high voltage equipment |
| CN205901265U (en) * | 2016-06-16 | 2017-01-18 | 无锡华阳科技有限公司 | Adopt quadrupole to get earthleakage protective equipment of electric mode |
| CN107345979A (en) * | 2017-08-29 | 2017-11-14 | 国家电网公司 | insulator leakage current on-line monitoring system |
| CN206908518U (en) * | 2017-03-27 | 2018-01-19 | 杜金昌 | Superposing type electric field induction electricity getting device |
| US10036779B2 (en) * | 2015-11-30 | 2018-07-31 | Battelle Energy Alliance, Llc | Systems and related methods for determining self-discharge currents and internal shorts in energy storage cells |
| CN109347062A (en) * | 2019-01-04 | 2019-02-15 | 江苏万帮德和新能源科技股份有限公司 | Self-checking system of leaking electricity and its working method |
| CN109962454A (en) * | 2017-12-26 | 2019-07-02 | 金洁 | Pass through the earth leakage protective device for the load that Switching Power Supply is powered |
| CN110007186A (en) * | 2019-04-23 | 2019-07-12 | 成都绎码科技有限公司 | A kind of detection of electrical leakage remote alarming device and method |
-
2019
- 2019-07-25 CN CN201910675114.9A patent/CN110286293B/en active Active
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060087322A1 (en) * | 2004-10-21 | 2006-04-27 | Mccollough Norman D Jr | Method and apparatus for a remote electric power line conductor faulted circuit current, conductor temperature, conductor potential and conductor strain monitoring and alarm system. |
| JP2009528014A (en) * | 2006-02-21 | 2009-07-30 | クリント マッコーウェン、 | Energy collection |
| JP2008218854A (en) * | 2007-03-07 | 2008-09-18 | Epson Imaging Devices Corp | Light quantity detecting circuit, electrooptical device, and electronic equipment |
| US20110234019A1 (en) * | 2007-08-17 | 2011-09-29 | Tmms Co., Ltd. | Method and device for transporting, distributing and managing electrical energy by remote longitudinal coupling in near field between electric dipoles |
| CN101436792A (en) * | 2008-12-09 | 2009-05-20 | 华中科技大学 | Electricity-fetching method for high voltage overhead transmission line on-line monitoring device |
| CN102061940A (en) * | 2010-11-30 | 2011-05-18 | 重庆梅安森科技股份有限公司 | Feed transducer for detecting differential mode leakage current of power cable |
| CN202026161U (en) * | 2011-04-19 | 2011-11-02 | 辽宁省电力有限公司鞍山供电公司 | High-tension electric field power taking device |
| CN102426858A (en) * | 2011-11-30 | 2012-04-25 | 中国科学院微电子研究所 | Method and system for detecting leakage current of storage units |
| CN203151236U (en) * | 2012-09-29 | 2013-08-21 | 吉林省电力有限公司长春供电公司 | Cable line arrester on-line monitoring system power supply |
| CN103513148A (en) * | 2013-09-11 | 2014-01-15 | 苏州萃智新技术开发有限公司 | Electric leakage warning device |
| CN204794380U (en) * | 2015-06-09 | 2015-11-18 | 国网山东济南市历城区供电公司 | Ring -opening formula high pressure induction electricity -taking and current monitoring device |
| CN204982982U (en) * | 2015-08-31 | 2016-01-20 | 中国环境科学研究院 | Signal acquisition device |
| US10036779B2 (en) * | 2015-11-30 | 2018-07-31 | Battelle Energy Alliance, Llc | Systems and related methods for determining self-discharge currents and internal shorts in energy storage cells |
| CN105738688A (en) * | 2016-05-09 | 2016-07-06 | 国网浙江省电力公司杭州供电公司 | Electrical inspection and locking device based on leakage current of high voltage equipment |
| CN205901265U (en) * | 2016-06-16 | 2017-01-18 | 无锡华阳科技有限公司 | Adopt quadrupole to get earthleakage protective equipment of electric mode |
| CN206908518U (en) * | 2017-03-27 | 2018-01-19 | 杜金昌 | Superposing type electric field induction electricity getting device |
| CN107345979A (en) * | 2017-08-29 | 2017-11-14 | 国家电网公司 | insulator leakage current on-line monitoring system |
| CN109962454A (en) * | 2017-12-26 | 2019-07-02 | 金洁 | Pass through the earth leakage protective device for the load that Switching Power Supply is powered |
| CN109347062A (en) * | 2019-01-04 | 2019-02-15 | 江苏万帮德和新能源科技股份有限公司 | Self-checking system of leaking electricity and its working method |
| CN110007186A (en) * | 2019-04-23 | 2019-07-12 | 成都绎码科技有限公司 | A kind of detection of electrical leakage remote alarming device and method |
Non-Patent Citations (2)
| Title |
|---|
| M. FUJII 等: "On-chip leakage monitor circuit to scan optimal reverse bias voltage for adaptive body-bias circuit under gate induced drain leakage effect", 《ESSCIRC 2008 - 34TH EUROPEAN SOLID-STATE CIRCUITS CONFERENCE》 * |
| 潘金斌 等: "电石炉电极绝缘状况的跟踪监测", 《江苏化工》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112491007A (en) * | 2020-11-23 | 2021-03-12 | 云南电网有限责任公司临沧供电局 | Leakage current protection, monitoring and early warning system and method |
| CN112491007B (en) * | 2020-11-23 | 2023-06-27 | 云南电网有限责任公司临沧供电局 | Leakage current protection, monitoring and early warning system and method |
| CN114280501A (en) * | 2021-12-27 | 2022-04-05 | 重庆金山医疗技术研究院有限公司 | High-frequency leakage current detection method and device for high-frequency electrotome |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110286293B (en) | 2021-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110412347B (en) | Electricity stealing behavior identification method and device based on non-invasive load monitoring | |
| CN201628747U (en) | On-line detection device for insulation resistance of suspension insulator | |
| CN104181429B (en) | On-line loss measurement system for three-winding transformer | |
| CN110286293A (en) | A kind of self-energizing electric leakage monitoring method and system based on leakage current | |
| CN203337722U (en) | Voltage and current collecting device of grid overhead transmission line | |
| CN105334375A (en) | PT-CT combined device capable of being installed in charged mode | |
| CN205404706U (en) | Electric automobile fills electric pile's electric energy quality dynamic monitoring system based on DSP | |
| CN110286294A (en) | A kind of self-energizing device and method for monitoring of leaking electricity | |
| CN212255491U (en) | Dynamic contact resistance detection circuit of high-voltage circuit breaker | |
| CN204964656U (en) | Portable insulator intellectual detection system appearance | |
| CN202049199U (en) | Circuit for routine experiments without removing high-voltage leads | |
| CN203433077U (en) | Fault indicator of distribution network | |
| CN202676845U (en) | Device for monitoring earth fault of transformer core | |
| CN207336219U (en) | A kind of tension test fixture applied to cable | |
| CN201378176Y (en) | High-precision anti-interference excitation power supply for ground screen flaw comprehensively-diagnosing system in transformer substation | |
| CN203479976U (en) | Transformer winding discharge test apparatus | |
| CN202471837U (en) | A battery internal resistance measuring circuit | |
| CN115327221A (en) | Non-invasive wireless electric energy metering system and method | |
| CN102103156B (en) | Digital current transformer and method for measuring current of AC (Alternating Current) transmission conductor | |
| CN103472359B (en) | A kind of distribution system fault indicator | |
| CN203949980U (en) | The charged detector of capacitance type potential transformer | |
| CN105629138A (en) | Multifunctional suspension type porcelain insulator on-line detector | |
| CN112505430A (en) | Passive high-voltage capacitor capacitance online monitoring system and method | |
| CN202929145U (en) | Device and system for aerial line grounding fault detection | |
| Ji et al. | A New Type of Current Mining Device for Testing the Insulation of High-Voltage Cables by Ground Current Method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |