CN114325048A - Self-energy-taking flexible current measuring device - Google Patents
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- CN114325048A CN114325048A CN202111615900.3A CN202111615900A CN114325048A CN 114325048 A CN114325048 A CN 114325048A CN 202111615900 A CN202111615900 A CN 202111615900A CN 114325048 A CN114325048 A CN 114325048A
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Abstract
The invention relates to a self-powered flexible current measuring device, comprising: the measuring module comprises an alternating current sensor and can measure alternating current in a conductor to be measured; the power supply module comprises an induction circuit and can generate induction current by inducing an alternating magnetic field in a conductor to be detected; processing module, including carrying on the back first link and the second link that sets up mutually and carrying on the back third link and the fourth link that sets up mutually, the relative both ends of measuring module form the first annular channel that can supply the conductor that awaits measuring to pass when being connected with first link and second link respectively, the relative both ends of power module form the second annular channel that can supply the conductor that awaits measuring to pass when being connected with third link and fourth link respectively, power module can supply power for processing module, processing module can measure the induced-current that produces on the measuring module after acquireing power module's electric current. The device has the advantages of simple structure, wide frequency and capability of realizing self-energy supply.
Description
Technical Field
The invention relates to the technical field of power measurement, in particular to a self-energy-taking flexible current measuring device.
Background
Current measurement plays a vital role in the power industry, providing the power system with the necessary information for metering, control and relay protection. At present, the current measurement of an electric power system still mainly depends on the traditional electromagnetic current transformer, and the sensor has the defects of heavy volume, high price, prevention of iron core saturation, measurement of alternating current signals only, low frequency, incapability of measuring high-frequency current and adoption of an external power supply. With the continuous development of power grids in the direction of intellectualization and digitization, the demands for developing miniaturized, easy-to-install and low-cost current sensors are more and more urgent.
Disclosure of Invention
In view of the above, it is necessary to provide a current measurement device which is light in weight, has a wide measurement frequency range, and does not require a power supply.
A self-energizing compliant current measuring device, comprising:
a measurement module comprising an alternating current sensor, the measurement module capable of measuring alternating current in a conductor under test;
the power supply module comprises an induction circuit and can generate induction current by inducing an alternating magnetic field in the conductor to be detected;
the processing module comprises a first connecting end and a second connecting end which are arranged in a back-to-back mode, and a third connecting end and a fourth connecting end which are arranged in a back-to-back mode, a first annular channel for the conductor to be measured to penetrate is formed when the two opposite ends of the measuring module are respectively connected with the first connecting end and the second connecting end, a second annular channel for the conductor to be measured to penetrate is formed when the two opposite ends of the power supply module are respectively connected with the third connecting end and the fourth connecting end, the power supply module can supply power for the processing module, and induced current generated on the measuring module can be measured after the processing module obtains the current of the power supply module.
The self-energy-taking flexible current measuring device comprises a measuring module, a power supply module and a processing module, and is simple in structure and convenient to carry. Because the measuring module adopts the alternating current sensor, the measuring module has wider measuring frequency; and the power supply module can induce an alternating magnetic field in the conductor to be tested of the alternating current meter through the induction circuit to generate induction current to supply power to the processing module. When measuring the alternating current in the conductor to be measured, two opposite ends of the measuring module and the processing module are respectively connected with the first connecting end and the second connecting end to form a first annular channel, and the conductor to be measured is positioned in the first annular channel; because alternating current flows in the conductor to be measured, the alternating current sensor in the measuring module can transmit induced current generated when the conductor to be measured is induced to the processing module; the power supply module is connected with a third connecting end and a fourth connecting end which are opposite to the processing module to form a second annular channel, the conductor to be detected is located in the second annular channel, the induction circuit in the power supply module receives the change of the alternating magnetic field in the conductor to be detected to generate induction current, the induction current generated by the power supply module can supply power for the processing module, and the processing module can analyze the induction current generated by the measuring module after acquiring the current of the power supply module, so that the related current data in the power system can be acquired.
In one embodiment, the ac current sensor is a rogowski coil.
In one embodiment, the induction circuit includes a high magnetic permeability core and a coil disposed on the high magnetic permeability core.
In one embodiment, the high magnetic permeability core comprises permalloy.
In one embodiment, the current detection device further comprises a housing having a receiving cavity, and the processing module is received in the receiving cavity.
In one embodiment, the housing includes a first side surface and a second side surface that are opposite to each other, the first side surface is provided with a first through hole and a second through hole, the first through hole and the second through hole are respectively communicated with the accommodating cavity, the second side surface is provided with a third through hole and a fourth through hole, the third through hole and the fourth through hole are respectively communicated with the accommodating cavity, one end of the measuring module penetrates through the first through hole to be connected with the first connecting end, the other end of the measuring module penetrates through the third through hole to be connected with the third connecting end, one end of the power supply module penetrates through the second through hole to be communicated with the second connecting end, and the other end of the power supply module penetrates through the fourth through hole to be connected with the fourth connecting end.
In one embodiment, the measurement module and the power supply module are arranged in parallel, the first through hole is communicated with the second through hole, and the third through hole is communicated with the fourth through hole.
In one embodiment, the measuring module and the power supply module are each provided with an insulating sleeve.
In one embodiment, a fastener is arranged at the same end of the measuring module and the power supply module, and the fastener clamps the insulating sleeve and fixes the insulating sleeve on the measuring module and the power supply module respectively.
In one embodiment, the upper surface of the shell is provided with a mounting hole, the mounting hole is communicated with the accommodating cavity, and a fastening piece is arranged at the mounting hole and can fix the measuring module and the power supply module on the shell.
Drawings
FIG. 1 is a schematic structural diagram of a self-powered flexible current measuring device according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a self-energized flexible current measuring device in another embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a self-energized flexible current measuring device in accordance with yet another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a self-energized flexible current measuring device according to another embodiment of the present invention.
The reference numbers illustrate:
100. a measurement module; 110. an alternating current sensor; 120. a first annular channel;
130. an insulating sleeve; 140. buckling;
200. a power supply module; 210. a sensing circuit; 220. a second annular channel;
300. a processing module; 310. a first connection end; 320. a second connection end; 330. a third connection end;
340. a fourth connection end;
400. a housing; 410. an accommodating cavity; 420. a first side surface; 421. a first through hole;
422. a second through hole; 430. a second side surface; 431. a third through hole; 432. a fourth via hole;
440. mounting holes; 450. a fastener.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Current measurement plays a vital role in the power industry, providing the power system with the necessary information for metering, control and relay protection. At present, the current measurement of an electric power system still mainly depends on the traditional electromagnetic current transformer, and the sensor has the defects of heavy volume, high price, prevention of iron core saturation, measurement of alternating current signals only, low frequency, incapability of measuring high-frequency current and adoption of an external power supply. With the continuous development of power grids in the direction of intellectualization and digitization, the demands for developing miniaturized, easy-to-install and low-cost current sensors are more and more urgent. To solve the problems of the existing self-energy-taking flexible current measuring device, researchers provide a self-energy-taking flexible current measuring device which is simple in composition, light in weight and capable of realizing self-energy supply.
Referring to fig. 1, fig. 1 is a schematic structural diagram illustrating a self-energized flexible current measuring device according to an embodiment of the present invention, where the self-energized flexible current measuring device according to the embodiment of the present invention includes: the measuring module 100, the power supply module 200 and the processing module 300, wherein the measuring module 100 and the power supply module 200 can respectively form a channel through which a conductor to be measured can pass, the measuring module 100 is used for measuring alternating current in the conductor, the power supply module 200 can induce an alternating magnetic field in the conductor to be measured to generate induced current and supply power to the processing module 300, and the processing module 300 can process the induced current generated by the measuring module 100 after acquiring the induced current provided by the power supply module 200, so as to acquire current in the conductor to be measured.
Specifically, as also shown in fig. 2, the measurement module 100 includes an ac current sensor 110, wherein the measurement module 100 is capable of measuring an ac current in a conductor to be measured; the power supply module 200 includes an induction circuit 210, wherein the power supply module 200 is capable of generating an induction current by inducing an alternating magnetic field in a conductor to be tested; the processing module 300 includes a first connection end 310 and a second connection end 320 which are arranged opposite to each other, and a third connection end 330 and a fourth connection end 340 which are arranged opposite to each other, wherein a first annular channel 120 through which a conductor to be measured can pass is formed when two opposite ends of the measuring module 100 are respectively connected with the first connection end 310 and the second connection end 320, a second annular channel 220 through which a conductor to be measured can pass is formed when two opposite ends of the power supply module 200 are respectively connected with the third connection end 330 and the fourth connection end 340, the power supply module 200 can supply power to the processing module 300, and the processing module 300 can measure an induced current generated on the measuring module 100 after obtaining a current of the power supply module 200.
In this embodiment, the self-powered flexible current measuring device includes the measuring module 100, the power supply module 200, and the processing module 300 in terms of composition, and is simple in structure and convenient to carry. Because the measuring module 100 adopts the alternating current sensor 110, the measuring module 100 has a wider measuring frequency; the power supply module 200 can induce the alternating magnetic field in the conductor to be measured to generate an induced current through the induction circuit 210 to power the processing module 300. When measuring the alternating current in the conductor to be measured, the two opposite ends of the measuring module 100 and the processing module 300 are respectively connected with the first connecting end 310 and the second connecting end 320 to form a first annular channel 120, and the conductor to be measured is located in the first annular channel 120; since an alternating current flows in the conductor to be measured, the alternating current sensor 110 in the measurement module 100 can transmit an induced current generated when the conductor to be measured is induced to the processing module 300; the third connection end 330 and the fourth connection end 340 of the power supply module 200 opposite to the processing module 300 are connected to form a second annular channel 220, at this time, the conductor to be measured is located in the second annular channel 220, the induction circuit 210 in the power supply module 200 receives the change of the alternating magnetic field in the conductor to be measured to generate an induction current, the induction current generated by the power supply module 200 can supply power to the processing module 300, and the processing module 300 can analyze the induction current generated by the measurement module 100 after acquiring the current of the power supply module 200, so as to acquire related current data in the power system. The self-energy-taking flexible current measuring device provided by the invention has the advantages of simple structure, wide alternating current frequency measurement and capability of realizing self-energy supply.
The ac current sensor 110 mainly includes an electromagnetic current transformer, a hall transformer, and a rogowski coil. The electromagnetic current transformer is a special transformer, the secondary current and the primary current of the electromagnetic current transformer are substantially proportional under normal use conditions, and the phase difference of the electromagnetic current transformer is close to zero when the connection method is correct. Secondary windings are used for measuring instruments, meters, relays and other similar electrical appliances. The Hall mutual inductor is based on the Hall effect principle and comprises an open-loop Hall current sensor and a closed-loop Hall current sensor, wherein the closed-loop Hall current sensor is also called a zero-flux current sensor or a magnetic balance type current sensor. The Rogowski coil is a hollow annular coil, has two types of flexibility and rigidity, and can be directly sleeved on a conductor to be measured to measure alternating current. When comparing with the existing ac current sensor 110, the rogowski coil can be selected, has a wider frequency range, has no requirements on the conductor to be measured and the size, and is very suitable for high-voltage distribution and large-current measurement. The theoretical basis of the Rogowski coil for measuring the current is Faraday's law of electromagnetic induction and Ampere's loop law, when the measured current passes through the center of the Rogowski coil along the axis, a correspondingly changed magnetic field is generated in the volume surrounded by the annular winding, the intensity is H, and the measured current is obtained by the Ampere's loop law:
∮H·dl＝I(t)
from B ═ μ H, e (t) ═ d Φ/dt, Φ ═ N ═ B · dS, e (t) ═ M · di/dt, we obtain:
when the cross section is rectangular, the mutual inductance M and the self-inductance L are respectively as follows:
M＝μ0Nhln(b/a)/2π
L＝μ0N^2hln(b/a)/2π
in the above formula, H is the magnetic field strength inside the coil, B is the magnetic induction inside the coil, μ 0 is the vacuum permeability, N is the number of turns of the coil, e (t) is the induced voltage at both ends of the coil, a, B are the inner and outer diameters of the cross section of the coil, and H is the height of the cross section. It can be seen that, when the coil is constant, M is constant, and the output voltage of the coil is proportional to di/dt. That is, the output voltage of the rogowski coil is proportional to the differential of the measured current, and the output voltage proportional to the primary current can be obtained by passing the output through an integrator. An integrator may be provided within the processing module 300 for this purpose.
Researchers need to consider circuits with better magnetic flux performance when setting up the inductive circuit 210 in the power module 200 to meet the power requirements of the processing module 300. The inductive circuit 210 designed for this researcher includes a high magnetic permeability core and a coil disposed on the high magnetic permeability core. The high-magnetic-permeability iron core comprises permalloy, and the high-magnetic-permeability iron core can be formed by overlapping and winding multiple layers of permalloy. It should be noted that permalloy is a flexible iron-nickel alloy, and permalloy has high low-intensity magnetic permeability. The permalloy has the advantages that on one hand, the permalloy can be conveniently wound into different sizes according to the size of a wire to be measured; on the other hand, even if the current in the conductor to be measured is small, the permalloy still can obtain energy from the alternating magnetic field around the conductor to be measured by utilizing the high permeability characteristic,
in order to better protect the process module 300, in an embodiment, referring to fig. 3, the current detection apparatus further includes a housing 400, wherein the housing 400 has a receiving cavity 410, and the process module 300 is received in the receiving cavity 410. The process module 300 can be better protected when the process module 300 is received in the receiving cavity 410 of the housing 400 to reduce interference thereof by external environmental factors.
Further, the housing 400 includes a first side surface 420 and a second side surface 430 that are opposite to each other, wherein the first side surface 420 of the housing 400 is provided with a first through hole 421 and a second through hole 422, the first through hole 421 and the second through hole 422 are respectively communicated with the accommodating cavity 410, the second side surface 430 of the housing 400 is provided with a third through hole 431 and a fourth through hole 432, the third through hole 431 and the fourth through hole 432 are respectively communicated with the accommodating cavity 410, one end of the measurement module 100 passes through the first through hole 421 to be connected with the first connection end 310 of the processing module 300, the other end of the measurement module 100 passes through the third through hole 431 to be connected with the second connection end 320 of the processing module 300, one end of the power supply module 200 passes through the second through hole 422 to be communicated with the third connection end 330 of the processing module 300, and the other end of the power supply module 200 passes through the fourth through hole 432 to be connected with the fourth connection end 340 of the processing module 300.
In the present embodiment, by providing the first through hole 421 and the second through hole 422 at the first side 420 of the case 400 and providing the third through hole 431 and the fourth through hole 432 at the second side 430 of the case 400, it is possible to connect the measuring module 100 with the first connection terminal 310 and the second connection terminal 320 of the process module 300 and communicate the power supply module 200 with the third connection terminal 330 and the fourth connection terminal 340 of the process module 300.
In order to facilitate the arrangement of the measurement module 100 and the power supply module 200 and the measurement of the conductor to be measured, in an embodiment, referring to fig. 4, the measurement module 100 and the power supply module 200 are arranged in parallel, wherein the first through hole 421 and the second through hole 422 of the first side surface 420 of the housing 400 are communicated, and the third through hole 431 and the fourth through hole 432 of the second side surface 430 of the housing 400 are communicated. When the measurement module 100 and the power supply module 200 are arranged side by side, the measurement module 100 and the power supply module 200 are arranged on a conductor to be measured only once, and the measurement module 100 and the power supply module 200 do not need to be wound on the conductor to be measured respectively at each time, and the measurement module 100 and the power supply module 200 which are arranged side by side can be conveniently connected with the processing module 300 by communicating the first through hole 421 and the second through hole 422 of the first side surface 420 and communicating the third through hole 431 and the fourth through hole 432 of the second side surface 430. Meanwhile, the measurement module 100 and the power supply module 200 are arranged side by side, so that the measurement module 100 and the power supply module 200 are conveniently arranged, and wiring errors are prevented. In addition, the measuring module 100 may be cylindrical in shape, and the block of the power supply module 200 may be flat in shape.
These factors can cause the surface of the power module 200 to become charged, taking into account the presence of dust, moisture, etc. in the operating environment of the self-powered flexible current measuring device. There is a certain safety risk when the operator uses the self-powered flexible current measuring device, and in order to solve this problem, the measurement module 100 and the power supply module 200 need to be protected. Specifically, referring to fig. 4, in one embodiment, the measurement module 100 and the power module 200 are each provided with an insulating sheath 130. The insulating sleeve 130 can respectively protect the measuring module 100 and the power supply module 200 from the interference of external environmental factors, and simultaneously improves the safety of the self-powered flexible current measuring device in use.
Further, in order to ensure the tightness of the insulation sleeve 130 sleeved on the measurement module 100 and the power supply module 200, respectively, and prevent the insulation sleeve 130 from moving relative to the measurement module 100 or the power supply module 200, a fastener 140 may be provided to clamp the insulation sleeve 130 on the measurement module 100 and the power supply module 200. Specifically, in one embodiment, referring to fig. 4, a clip 140 is disposed at the same end of the measurement module 100 and the power supply module 200, and the clip 140 clamps the insulating sheath 130 and fixes the insulating sheath 130 to the measurement module 100 and the power supply module 200, respectively. Additionally, the fastener 140 may be made of an insulating material to isolate the measurement module 100 from the process module 300 and to isolate the power module 200 from the process module 300.
When using the self-powered flexible current measuring device, researchers have different requirements on the lengths of the measuring module 100 and the power supply module 200 due to the different sizes of the conductors to be measured. To solve this problem, the measurement module 100 and the power supply module 200 may be sized to have a certain length, the measurement module 100 and the power supply module 200 may be partially received in the receiving cavity 410 of the case 400, and when a longer measurement module 100 and a longer power supply module 200 are required, a part of the measurement module 100 and the power supply module 200 may be pulled out of the receiving cavity 410. Specifically, in one embodiment, referring to fig. 4, the housing 400 is provided with a mounting hole 440 on the upper surface thereof, wherein a fastener 450 is disposed at the mounting hole 440, and the fastener 450 can fix the measurement module 100 and the power module 200 on the housing 400. After the measuring module 100 and the power supply module 200 are respectively sleeved on the conductor to be measured, the measuring module 100 and the power supply module 200 which are too long are pressed against the accommodating cavity 410 of the housing 400, and then the fastener 450 penetrates through the mounting hole 440 to press the measuring module 100 and the power supply module 200 against the bottom wall of the accommodating cavity 410. Wherein the fastening member 450 may be a screw, the sidewall of the mounting hole 440 is provided with a threaded hole, and the fastening member 450 may cooperate with the threaded hole of the mounting hole 440, thereby achieving an effect of fastening the measurement module 100 and the power supply module 200.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A self-energizing compliant current measuring device, comprising:
a measurement module comprising an alternating current sensor, the measurement module capable of measuring alternating current in a conductor under test;
the power supply module comprises an induction circuit and can generate induction current by inducing an alternating magnetic field in the conductor to be detected;
the processing module comprises a first connecting end and a second connecting end which are arranged in a back-to-back mode, and a third connecting end and a fourth connecting end which are arranged in a back-to-back mode, a first annular channel for the conductor to be measured to penetrate is formed when the two opposite ends of the measuring module are respectively connected with the first connecting end and the second connecting end, a second annular channel for the conductor to be measured to penetrate is formed when the two opposite ends of the power supply module are respectively connected with the third connecting end and the fourth connecting end, the power supply module can supply power for the processing module, and induced current generated on the measuring module can be measured after the processing module obtains the current of the power supply module.
2. A self-energizing flexible current measuring device as defined in claim 1 wherein said ac current sensor is a rogowski coil.
3. The self-energized flexible current measuring device of claim 1, wherein the inductive circuit includes a high magnetic permeability core and a coil disposed on the high magnetic permeability core.
4. The self-energized, flexible current measuring device of claim 3, wherein the high magnetic permeability core comprises permalloy.
5. A self-energized flexible current measuring device according to any one of claims 2 to 4, wherein the current sensing device further comprises a housing having a receiving cavity in which the processing module is received.
6. The self-energized flexible current measuring device according to claim 5, wherein the housing includes a first side surface and a second side surface opposite to each other, the first side surface is provided with a first through hole and a second through hole, the first through hole and the second through hole are respectively communicated with the accommodating cavity, the second side surface is provided with a third through hole and a fourth through hole, the third through hole and the fourth through hole are respectively communicated with the accommodating cavity, one end of the measuring module passes through the first through hole and is connected with the first connecting end, the other end of the measuring module passes through the third through hole and is connected with the third connecting end, one end of the power supply module passes through the second through hole and is communicated with the second connecting end, and the other end of the power supply module passes through the fourth through hole and is connected with the fourth connecting end.
7. The self-energized flexible current measuring device of claim 6, wherein the measurement module is juxtaposed with the power module, the first through hole is in communication with the second through hole, and the third through hole is in communication with the fourth through hole.
8. A self-energized flexible current measuring device according to claim 7, wherein said measuring module and said power supply module are each provided with an insulating sleeve.
9. The self-energized flexible current measuring device of claim 8, wherein the same end of the measuring module and the power module is provided with a snap that grips the insulating sleeve and secures the insulating sleeve to the measuring module and the power module, respectively.
10. The self-energized flexible current measuring device of claim 9, wherein the housing has a mounting hole formed in an upper surface thereof, the mounting hole communicating with the receiving cavity, the mounting hole having a fastener disposed therein, the fastener being capable of securing the measuring module and the power module to the housing.
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Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4831327A (en) * | 1987-05-01 | 1989-05-16 | Hydro-Quebec | Self-powered electrical measuring system isolated from electrical perturbances |
| JP2002122627A (en) * | 2000-10-16 | 2002-04-26 | Kandenko Co Ltd | Search device for electric wire or cable and method therefor |
| US20060082356A1 (en) * | 2004-10-19 | 2006-04-20 | Siemens Energy And Automation, Inc. | Flexible current sensor |
| US20080036448A1 (en) * | 2006-08-03 | 2008-02-14 | Kovach Daniel J | Method and system for measurement of current flows in fastener arrays |
| US20080211484A1 (en) * | 2007-01-19 | 2008-09-04 | Admmicro Properties, L.L.C. | Flexible current transformer assembly |
| WO2009015200A1 (en) * | 2007-07-25 | 2009-01-29 | Power Monitors Inc. | Method and apparatus for an electrical conductor monitoring system |
| KR20100094018A (en) * | 2009-02-18 | 2010-08-26 | 손정아 | Flexible sensor for measuring current using rogowski coil |
| US20120248936A1 (en) * | 2011-04-01 | 2012-10-04 | Hsieh-Shen Hsieh | Passive alternating current sensor |
| CN203414520U (en) * | 2013-08-30 | 2014-01-29 | 中国西电电气股份有限公司 | Power transmission line arrester leakage current on-line monitoring system |
| CN105826954A (en) * | 2016-04-28 | 2016-08-03 | 四川瑞霆电力科技有限公司 | Induction power taking system and method of overhead line fault indicator |
| CN207924064U (en) * | 2018-01-25 | 2018-09-28 | 武汉星创源科技有限公司 | A kind of distribution network line panorama on-line monitoring equipment and system |
| CN110244103A (en) * | 2019-01-16 | 2019-09-17 | 国网浙江杭州市富阳区供电有限公司 | A kind of clamp on amperemeter based on Rogowski coil |
| CN110729772A (en) * | 2019-11-20 | 2020-01-24 | 青岛科汇电气有限公司 | Intelligent power supply and power supply control method for electronic current transformer |
| CN210181114U (en) * | 2019-01-16 | 2020-03-24 | 国网浙江杭州市富阳区供电有限公司 | Detect convenient residual current detection device |
| CN111965413A (en) * | 2020-09-03 | 2020-11-20 | 南方电网数字电网研究院有限公司 | Current measuring method |
| CN212932733U (en) * | 2020-07-14 | 2021-04-09 | 郑州开地信息科技有限公司 | Online monitored control system of power consumption based on thing networking |
| CN213122085U (en) * | 2020-07-24 | 2021-05-04 | 厦门振泰成科技有限公司 | Plug-in type Rogowski coil |
-
2021
- 2021-12-27 CN CN202111615900.3A patent/CN114325048A/en active Pending
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4831327A (en) * | 1987-05-01 | 1989-05-16 | Hydro-Quebec | Self-powered electrical measuring system isolated from electrical perturbances |
| JP2002122627A (en) * | 2000-10-16 | 2002-04-26 | Kandenko Co Ltd | Search device for electric wire or cable and method therefor |
| US20060082356A1 (en) * | 2004-10-19 | 2006-04-20 | Siemens Energy And Automation, Inc. | Flexible current sensor |
| US20080036448A1 (en) * | 2006-08-03 | 2008-02-14 | Kovach Daniel J | Method and system for measurement of current flows in fastener arrays |
| US20080211484A1 (en) * | 2007-01-19 | 2008-09-04 | Admmicro Properties, L.L.C. | Flexible current transformer assembly |
| WO2009015200A1 (en) * | 2007-07-25 | 2009-01-29 | Power Monitors Inc. | Method and apparatus for an electrical conductor monitoring system |
| KR20100094018A (en) * | 2009-02-18 | 2010-08-26 | 손정아 | Flexible sensor for measuring current using rogowski coil |
| US20120248936A1 (en) * | 2011-04-01 | 2012-10-04 | Hsieh-Shen Hsieh | Passive alternating current sensor |
| CN203414520U (en) * | 2013-08-30 | 2014-01-29 | 中国西电电气股份有限公司 | Power transmission line arrester leakage current on-line monitoring system |
| CN105826954A (en) * | 2016-04-28 | 2016-08-03 | 四川瑞霆电力科技有限公司 | Induction power taking system and method of overhead line fault indicator |
| CN207924064U (en) * | 2018-01-25 | 2018-09-28 | 武汉星创源科技有限公司 | A kind of distribution network line panorama on-line monitoring equipment and system |
| CN110244103A (en) * | 2019-01-16 | 2019-09-17 | 国网浙江杭州市富阳区供电有限公司 | A kind of clamp on amperemeter based on Rogowski coil |
| CN210181114U (en) * | 2019-01-16 | 2020-03-24 | 国网浙江杭州市富阳区供电有限公司 | Detect convenient residual current detection device |
| CN110729772A (en) * | 2019-11-20 | 2020-01-24 | 青岛科汇电气有限公司 | Intelligent power supply and power supply control method for electronic current transformer |
| CN212932733U (en) * | 2020-07-14 | 2021-04-09 | 郑州开地信息科技有限公司 | Online monitored control system of power consumption based on thing networking |
| CN213122085U (en) * | 2020-07-24 | 2021-05-04 | 厦门振泰成科技有限公司 | Plug-in type Rogowski coil |
| CN111965413A (en) * | 2020-09-03 | 2020-11-20 | 南方电网数字电网研究院有限公司 | Current measuring method |
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