CN112666377A - Cubical switchboard three-phase generating line current measuring device - Google Patents
Cubical switchboard three-phase generating line current measuring device Download PDFInfo
- Publication number
- CN112666377A CN112666377A CN202011613304.7A CN202011613304A CN112666377A CN 112666377 A CN112666377 A CN 112666377A CN 202011613304 A CN202011613304 A CN 202011613304A CN 112666377 A CN112666377 A CN 112666377A
- Authority
- CN
- China
- Prior art keywords
- telescopic rod
- sliding
- switch cabinet
- sliding plate
- magnetic sensor
- 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.)
- Pending
Links
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 abstract description 2
- 238000004904 shortening Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 9
- 239000011159 matrix material Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 239000013598 vector Substances 0.000 description 4
- 230000006698 induction Effects 0.000 description 3
- 238000004422 calculation algorithm Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000012791 sliding layer Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Abstract
The invention discloses a three-phase bus current measuring device for a switch cabinet, which comprises a first telescopic rod, wherein a first driving component for tightly pressing two end surfaces of the first telescopic rod on the side wall of the switch cabinet is arranged on the first telescopic rod, a second telescopic rod synchronously extending or shortening with the first telescopic rod is arranged above the first telescopic rod, a sliding block is slidably connected on the second telescopic rod, a first limiting component for controlling the position of the sliding block is arranged on the second telescopic rod, a sliding plate is inserted in the sliding block, a second limiting component for limiting the position of the sliding plate is arranged on the sliding block, a magnetic sensor is arranged at one end of the sliding plate, a first scale is arranged on the second telescopic rod, and a second scale is arranged on the sliding plate.
Description
Technical Field
The invention relates to the technical field of switch cabinets, in particular to a three-phase bus current measuring device for a switch cabinet.
Background
The problem that magnetic fields exist around cables and the magnetic fields among three phases of a switch cabinet interfere with each other is difficult to solve the magnetic interference among the three-phase cables effectively, and along with the continuous development of sensing technology, the application of a magnetic sensor in the field of current measurement is more and more extensive, and the magnetic sensor becomes one of key devices in the field of electronic measurement. The magnetic field of the bus current in the switch cabinet is measured by using the magnetic sensor, and the inverse solution of the current through a corresponding algorithm is a feasible method, and the key technology is how to establish the relationship between the magnetic field measured by the magnetic sensor and the actual current.
Magnetic sensor current measurement generally goes through three phases: the initial stage is single-sensor measurement, but the data measured by the single sensor comprises the magnetic field generated by the current to be measured and the interference magnetic field generated by other phase buses. The single sensor cannot effectively distinguish the measurement magnetic field from the interference magnetic field, and the precision cannot meet the measurement requirement of a large-current system; later, a ring-shaped sensor array is adopted, and a plurality of magnetic sensors are surrounded around a bus, so that the measurement accuracy is greatly improved, but the method is only suitable for measuring a direct current situation and cannot meet an alternating current situation. Finally, the current is measured by utilizing a sensor array topological structure, the relationship between a magnetic field and current is established while interference is eliminated by analyzing and processing output data of the sensor, and the actual current value on the bus is obtained by measuring the voltage output value of the magnetic sensor.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a three-phase bus current measuring device for a switch cabinet, in which a magnetic sensor is disposed on a sliding plate, the sliding plate is disposed on a sliding block, the position of the magnetic sensor can be conveniently adjusted and fixed, the detection is convenient, and the accuracy is high.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a cubical switchboard three-phase generating line current measuring device, includes telescopic link one, set up on the telescopic link one and press the drive assembly one on the cubical switchboard lateral wall with a telescopic link both ends face, telescopic link one top sets up the telescopic link two with the synchronous extension of telescopic link or shorten, sliding connection slider on the telescopic link two, set up the spacing subassembly one of control slider position on the telescopic link two, peg graft the sliding plate in the slider, set up the spacing subassembly two of restriction sliding plate position on the slider, sliding plate one end sets up magnetic sensor, set up scale one on the telescopic link two, set up scale two on the sliding plate.
Further, a push pedal is arranged at two ends of the telescopic rod, the telescopic rod II is arranged between the push pedals, the telescopic rod II is composed of a plurality of parallel cross rods, a cleaning hole for the telescopic rod II to pass is formed in the sliding block, a plurality of protrusions I and each protrusion I are arranged on the inner wall of the cleaning hole, and each protrusion I sliding groove I is arranged on each cross rod.
Furthermore, the first limiting assembly is a first bolt which is arranged on the side face of the sliding block at two or more intervals, and a clearing groove for the end part of a first bolt stud to slide is arranged on the cross rod which is in contact with the inner side wall of the sliding block.
Furthermore, a plug board is inserted in the sliding plate, a second driving component for driving the plug board to move and position is arranged between the sliding plate and the plug board, a distance sensor is arranged at one end of the sliding plate and used for measuring the distance between the distance sensor and one end of the plug board, and a magnetic sensor is arranged at the other end of the plug board.
Furthermore, the magnetic sensor is detachably connected with the other end of the inserting plate, the two scales are respectively arranged on two sides of the sliding plate, the second scale is referred to one side when the magnetic sensor is arranged on the end face of the inserting plate, and the second scale is referred to the other side when the magnetic sensor is arranged on the side face of the inserting plate.
Furthermore, an anti-skid layer is arranged on the side face, in contact with the side wall of the switch cabinet, of the push plate.
The invention has the beneficial effects that:
fix telescopic link both ends pressure fastening in the cubical switchboard, the magnetic sensor sets up the one end at the sliding plate, and the sliding plate is pegged graft on the sliding block, refers to the position of scale one adjustment slider, refers to scale two adjustment sliding plates, carries out accurate control to the position of magnetic sensor, fixes two pairs of magnetic sensor through spacing subassembly one and spacing subassembly, prevents the magnetic sensor shake, guarantees the measuring accuracy of magnetic sensor.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 from another angle;
FIG. 3 is a schematic structural diagram of a distance sensor;
FIG. 4 is a schematic structural view of a first telescopic rod;
FIG. 5 is a schematic view of the installation of the sliding plate, the insert plate, the distance sensor and the magnetic sensor;
the device comprises a first telescopic rod, a second telescopic rod, a 3-sliding block, a 4-sliding plate, a 5-magnetic sensor, a first scale, a 7-second scale, a 8-push plate, a 9-cross rod, a 10-clearing hole, a first protrusion, a first sliding groove, a 12-first sliding groove, a first bolt, a 14-clearing groove, a 15-inserting plate, a 16-distance sensor, a 17-anti-skidding layer, an 18-outer tube, a first screw rod, a 20-circular ring, a 21-first bearing, a 22-second protrusion, a second sliding groove, a 23-second sliding groove, a 24-star handle, a second bolt, a 26-groove, a second screw rod, a 28-vertical plate, a 29-concave frame and a 30-inserting hole.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A three-phase bus current measuring device of a switch cabinet is disclosed, as shown in figures 1 and 2, and comprises a first telescopic rod 1, wherein the first telescopic rod 1 is composed of an outer tube 18 and a first screw rod 19 inserted in the outer tube 18, two ends of the first telescopic rod 1 are both vertically fixed with push plates 8 through bolts, the first telescopic rod 1 is provided with a first driving assembly for tightly pressing two end faces of the first telescopic rod 1 on the side wall of the switch cabinet, the first driving assembly is a ring 20, as shown in figure 3, a first bearing 21 is bonded inside the right end of the ring 20, the inner circumferential surface of the first bearing 21 is bonded at the left end of the outer tube 18, an internal thread matched with the first screw rod 19 is processed inside the left end of the ring 20, two bulges 22 are symmetrically processed at the right end of the first screw rod 19, a second sliding chute 23 for the bulges 22 to slide left and right is processed inside the outer tube, at the moment, the ring 20 is twisted to extend or shorten the first telescopic, the ring 20 is screwed to extend the first telescopic rod 1, and the push plates 8 positioned on two sides of the first telescopic rod 1 are tightly pressed on the side wall of the switch cabinet.
The setting of 1 top of telescopic link is extended or the telescopic link two 2 that shortens in step with telescopic link 1, telescopic link two 2 sets up between push pedal 8, telescopic link two 2 comprises many parallel arrangement's horizontal pole 9, as shown in fig. 1 and 2, be located two horizontal poles 9 of 8 levels bonding in left push pedal, be located another horizontal pole 9 of 8 levels bonding in the push pedal on right side, four horizontal poles 9 are parallel to each other and adjacent horizontal pole 9 laminates each other, sliding connection cuboid massive structure's slider 3 on the telescopic link two 2, the clear hole 10 that supplies telescopic link two 2 to pass is processed out on the slider 3, as shown in fig. 4, process out four protruding one 11 on the clear hole 10 inner wall, every horizontal pole 9 lower extreme all processes out and supplies protruding one 11 gliding spout one 12, slider 3 can be at the telescopic link two 2 free horizontal slip this moment. Set up the spacing subassembly one of 3 positions of control slider on the telescopic link two 2, spacing subassembly one is the bolt 13 that two or more intervals of threaded connection set up in 3 sides of slider set, the embodiment is two bolts 13, the star type handle 24 bonds on the 13 nuts of bolt, the double-screw bolt tip of bolt 13 bonds the disc, prevent that bolt 13 breaks away from slider 3 when increasing area of contact between 13 double-screw bolts of bolt and the diaphragm, set up on the horizontal pole 9 with the 3 inside wall contacts of slider and supply the gliding clear away groove 14 of disc, two discs have at least one horizontal pole 9 of laminating completely this moment, it is fixed with slider 3.
The upper part of the sliding block 3 is inserted with a sliding plate 4, the sliding plate 4 is of a cuboid plate-shaped structure, the sliding plate 4 can only slide along the direction vertical to the first telescopic rod 1 and the second telescopic rod 2, the sliding block 3 is provided with a second limiting component for limiting the position of the sliding plate 4, the second limiting component is a second bolt 25 in threaded connection with the top of the sliding block, the top end of the second bolt 25 is bonded with a star-shaped handle 24, the bottom end of the second bolt 25 is provided with a disc, a groove 26 is processed on the inner top surface of the sliding block 3, and the disc can be immersed into the groove 26 to prevent; the magnetic sensor 5 is provided at one end of the sliding plate 4.
In order to increase the depth length of the magnetic sensor 5 towards the interior of the switch cabinet, the sliding plate 4 is of a cuboid shell-shaped structure with one open end, the inserting plate 15 is inserted inwards from the opening of the sliding plate 4, a second driving component for driving the inserting plate 15 to move and position is arranged between the sliding plate 4 and the inserting plate 15, the second driving component is a second screw 27, one end of the second screw 27 is in threaded connection with the inserting plate 15, the other end of the second screw is bonded with a second bearing, a round hole is processed on the end face, not opened, of the sliding plate 4, the peripheral surface of the bearing is bonded on the inner wall of the round hole, and a; the non-opened end of the sliding plate 4 is detachably provided with a distance sensor 16, and the distance sensor 16 is arranged in the following way: the vertical plates 28 are vertically bonded on the top surface and the bottom surface of the distance sensor 16, a through hole for the distance sensor 16 to pass through is processed on the sliding plate 4, after one end of the distance sensor 16 provided with a measuring end is inserted into the through hole, the vertical plate 28 is positioned outside the sliding plate 4, the vertical plate 28 is fixedly mounted on the sliding plate 4 through a bolt III, the sensor is used for measuring the distance between the distance sensor 16 and one end of the inserting plate 15 at the moment, preferably, the distance between the end surface of the inserting plate 15 and the inner end surface of the sliding rod is measured, and the magnetic sensor 5 is mounted at the other.
The three-phase generating line probably installs on the inner wall that the cubical switchboard is just to the opening part, also probably installs on cubical switchboard both sides wall, for convenient magnetic sensor 5 detects the three-phase generating line homoenergetic that is located the optional position, and picture peg 15 other end can be dismantled and set up magnetic sensor 5, as shown in fig. 5, and the setting mode is: the side of the magnetic sensor 5 without the induction end is bonded with the concave frame 29, the end surface and two side surfaces of the inserting plate 15 are both provided with inserting holes 30 for inserting the vertical plates 28 of the concave frame, and a user can vertically insert one vertical plate 28 of the concave plate into the corresponding inserting hole 30 as required to realize static connection between the magnetic sensor 5 and the inserting plate 15.
In order to facilitate a user to accurately master the position of the magnetic sensor 5, the second telescopic rod 2 is provided with a first scale 6, namely scales are machined on the top surfaces of the four cross rods 9; a second scale 7 is processed on the upper top surface of the sliding plate 4, the second scale 7 is two and is respectively arranged on two sides of the top surface of the sliding plate 4, and when the magnetic sensor 5 is arranged on the end surface of the inserting plate 15, the second scale 7 on one side is referred; when the magnetic sensor 5 is arranged on the side of the insert plate 15, the division of the first scale 6 and the second scale 7 can be freely selected by a person skilled in the art according to the needs, referring to the second scale 7 on the other side.
When the anti-falling device is used, the magnetic sensor 5 is installed at a proper position, the first telescopic rod 1 is horizontally placed into the switch cabinet, the circular ring 20 is rotated, the push plate 8 is tightly pressed on the side wall of the switch cabinet, and in order to prevent the first telescopic rod 1 from falling, the rubber anti-sliding layer 17 is bonded on the side face, which is in contact with the side wall of the switch cabinet; loosening the two bolts I13, sliding the sliding block 3 to a proper position left and right according to the scale I6, and then tightening one of the bolts I13 to enable the disc on the bolt I13 to be tightly pressed on the cross rod 9 to fix the sliding block 3; loosening the second bolt 25, moving the sliding plate 4 according to the second scale 7, moving to a proper position, and then tightening the second bolt 25 to fix the sliding plate 4; when the switch cabinet is deep and the length of the sliding plate 4 is not enough to send the magnetic sensor 5 to a proper position, the star-shaped handle 24 is held by hand to rotate the second screw 27, and the length of the inserted rod extending out of the sliding plate 4 is controlled according to the indication number displayed by the distance sensor 16. According to the mode, the relative positions of the sliding block 3, the sliding plate and the inserting plate 15 are adjusted, and the detection of the three-phase bus is completed.
The three-phase busbar of the switch cabinet can be regarded as parallel copper bars, the width of each phase of busbar is c, the thickness of each phase of busbar is d, and the distance between every two adjacent phase of busbars is L. And (2) mounting a magnetic sensor close to each phase busbar, and assuming that the distance from each corresponding magnetic sensor to the phase busbar is b and the distance from the corresponding magnetic sensor to the left edge of the phase busbar is a, so that two parameters a and b determine the topological structure of the magnetic sensor array. The distance L between the busbars, the actual width d and the thickness of each phase of busbar can be obtained according to the measurement of the switch cabinet in practical application.
The basic premise for measuring current using magnetic sensors is the linearity and superposition of the magnetic field, including linear superposition in space and frequency. The linear superposition in space refers to the linear relation between the intensity of the current and the magnetic field intensity generated by a point specified in space by the current, and for the multiphase current, the magnetic field intensity of the point is the vector superposition of the magnetic field intensity generated by each phase current at the point. Frequency linearity refers to the fact that for a given point in space, the magnetic induction coefficient of a current at that point is a certain value at a particular frequency. For a current of known frequency and phase, the induced magnetic field generated at a particular point is in phase with its same frequency, i.e., the magnetic field at that particular point is a superposition of the induced magnetic fields at that point for each frequency component of a given current.
Under the conditions of low frequency and small harmonic interference of a power grid, only the fundamental component of a current signal can be considered, the delay effect of a magnetic field and the skin effect generated by eddy current are ignored, and the relationship between the sensor voltage and the three-phase current is as follows:
obtained by a large number of experiments. And (3) adopting the mode of independently electrifying the current phase by phase to acquire the output of the three-phase magnetic sensor and calculating the corresponding induction coefficient. For example, the A-phase busbar is separately electrified, the B, C two phases are disconnected, and the values of c11, c12 and c13 can be calculated according to the voltage output signals of the three-phase magnetic sensor. And respectively calculating the values of the other two groups of vectors by the same experimental method, and finally obtaining the value of the coefficient matrix C.
In order to research the distribution condition of the electromagnetic field on the three-phase bus, ANSYS is utilized to carry out simulation on the distribution condition of the magnetic field in the switch cabinet. Through simulation of magnetic field distribution, it can be found that A, B, C has magnetic field distribution around the three-phase bus. The magnetic field intensity of any point in the bus indoor space is the result of vector superposition of A, B, C three-phase magnetic fields, and the magnetic field intensity measured by the magnetic sensor is the vector sum of the magnetic fields generated by the three-phase buses at the point. When the magnetic sensor is at a certain vertical distance d from the bus, the TMR magnetic sensor 5 outputs a value:
assuming that three-phase currents are symmetrical, the voltage output value measured by each magnetic sensor is as follows:
and Cij represents the voltage value of the i-type sensor at the j-type busbar.
Writing the above equation in matrix form:
the coefficient matrix C can be determined experimentally. When a single-phase current is firstly conducted, i2= i3=0, and the voltage output of three sensors is collected, so that C11, C21 and C31 can be calculated correspondingly. Similarly, two other sets of values can be measured separately to obtain the coefficient matrix C.
After the coefficient matrix C is obtained, the actual current value on the bus is obtained by measuring the voltage output value of the magnetic sensor.
Since the coefficient matrix needs to ensure the reversibility, the reversibility is ensured by adopting a method of multiplying the coefficient matrix by a transposed matrix thereof:
namely, it is
The above formula proves that the current value of the three-phase bus can be calculated by measuring the voltage by the sensor through the topological structure of the sensor array.
And acquiring the sensor measurement voltage of the three-phase bus by adopting a sensor array topological structure, and processing and calculating the current of the three-phase bus by utilizing an array mathematical model algorithm on an edge calculation platform.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. A three-phase bus current measuring device of a switch cabinet is characterized by comprising a first telescopic rod (1), the first telescopic rod () 1 is provided with a first driving component which tightly presses two end faces of the first telescopic rod (1) on the side wall of the switch cabinet, a second telescopic rod (2) which extends or shortens synchronously with the first telescopic rod (1) is arranged above the first telescopic rod (1), the second telescopic rod (2) is connected with a sliding block (3) in a sliding way, a first limiting component for controlling the position of the sliding block (3) is arranged on the second telescopic rod (3), a sliding plate (4) is inserted in the sliding block (3), a second limiting component for limiting the position of the sliding plate (4) is arranged on the sliding block (3), one end of the sliding plate (4) is provided with a magnetic sensor (5), the second telescopic rod (2) is provided with a first scale (6), and the sliding plate (4) is provided with a second scale (7).
2. The three-phase bus current measuring device of the switch cabinet as claimed in claim 1, wherein push plates (8) are arranged at two ends of the first telescopic rod (1), the second telescopic rod (2) is arranged between the push plates (8), the second telescopic rod (2) is composed of a plurality of cross rods (9) which are arranged in parallel, a cleaning hole (10) for the second telescopic rod (2) to pass through is formed in the sliding block (3), a plurality of first bulges (11) are arranged on the inner wall of the cleaning hole (10), and a first sliding groove (12) for the first bulges (11) to slide is formed in each cross rod (9).
3. The three-phase bus current measuring device of the switch cabinet as claimed in claim 2, wherein the first limiting component is two or more first bolts (13) arranged at intervals on the side surface of the sliding block (3), and a clearing groove (14) for sliding of the stud end part of the first bolt (13) is arranged on the cross rod (9) contacted with the inner side wall of the sliding block (3).
4. The three-phase bus current measuring device of the switch cabinet according to claim 1, wherein a patch panel (15) is inserted in the sliding plate (4), a second driving component for driving the patch panel (15) to move and position is arranged between the sliding plate (4) and the patch panel (15), a distance sensor (16) is arranged at one end of the sliding plate (4), the distance sensor (16) is used for measuring the distance between the distance sensor (16) and one end of the patch panel (15), and a magnetic sensor (5) is arranged at the other end of the patch panel (15).
5. The three-phase bus current measuring device of the switch cabinet according to claim 4, wherein the magnetic sensor (5) is detachably connected with the other end of the plug board (15), the two scales (7) are respectively arranged on two sides of the sliding board (4), when the magnetic sensor (5) is arranged on the end face of the plug board (15), the two scales (7) on one side are referred to, and when the magnetic sensor (5) is arranged on the side face of the plug board (15), the two scales (7) on the other side are referred to.
6. The three-phase bus current measuring device of the switch cabinet as claimed in claim 2, wherein the side of the push plate (8) contacting with the side wall of the switch cabinet is provided with an anti-slip layer (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011613304.7A CN112666377A (en) | 2020-12-31 | 2020-12-31 | Cubical switchboard three-phase generating line current measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011613304.7A CN112666377A (en) | 2020-12-31 | 2020-12-31 | Cubical switchboard three-phase generating line current measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112666377A true CN112666377A (en) | 2021-04-16 |
Family
ID=75411226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011613304.7A Pending CN112666377A (en) | 2020-12-31 | 2020-12-31 | Cubical switchboard three-phase generating line current measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112666377A (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2396492Y (en) * | 1999-08-27 | 2000-09-13 | 汕头经济特区南粤电器有限公司 | Front-mounted current transformer for switch cubicle |
| JP2013015437A (en) * | 2011-07-05 | 2013-01-24 | Toyota Motor Corp | Current sensor |
| CN103076576A (en) * | 2013-01-06 | 2013-05-01 | 山西省电力公司大同供电分公司 | Magnetic field intensity measuring device |
| CN105823936A (en) * | 2016-05-10 | 2016-08-03 | 国网山东省电力公司莱州市供电公司 | Telescopic current transformer rated ratio testing device |
| CN106501610A (en) * | 2016-11-02 | 2017-03-15 | 王飞 | A kind of switch cabinet bus fully-automated synthesis equipment |
| CN108614144A (en) * | 2018-05-08 | 2018-10-02 | 国网江西省电力有限公司电力科学研究院 | A kind of current sensor based on automatic biasing magnetic electric compound material |
| US20190170793A1 (en) * | 2017-12-05 | 2019-06-06 | Hitachi Metals, Ltd. | Current sensor |
| CN209247826U (en) * | 2018-09-30 | 2019-08-13 | 青岛特锐德电气股份有限公司 | A kind of copper bar support device |
| CN110333378A (en) * | 2019-05-31 | 2019-10-15 | 国网江西省电力有限公司电力科学研究院 | A kind of magnetoelectricity laminate current sensor device based on magnetic convergence effect |
| CN110635378A (en) * | 2019-10-16 | 2019-12-31 | 国网辽宁省电力有限公司抚顺供电公司 | Change 10kV cubical switchboard current transformer auxiliary device |
| CN110857950A (en) * | 2018-08-22 | 2020-03-03 | 力诚仪器股份有限公司 | Current sensing module for current sensor and manufacturing method thereof |
| CN110927432A (en) * | 2019-12-17 | 2020-03-27 | 江西云泰铜业有限公司 | Current measuring device of copper bar type wire |
| CN111123175A (en) * | 2020-03-30 | 2020-05-08 | 江西科技学院 | Magnetic variable measuring device and measuring method thereof |
| CN111537926A (en) * | 2020-05-20 | 2020-08-14 | 河北工业大学 | Measuring system and measuring method suitable for multi-scene space magnetic field |
-
2020
- 2020-12-31 CN CN202011613304.7A patent/CN112666377A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2396492Y (en) * | 1999-08-27 | 2000-09-13 | 汕头经济特区南粤电器有限公司 | Front-mounted current transformer for switch cubicle |
| JP2013015437A (en) * | 2011-07-05 | 2013-01-24 | Toyota Motor Corp | Current sensor |
| CN103076576A (en) * | 2013-01-06 | 2013-05-01 | 山西省电力公司大同供电分公司 | Magnetic field intensity measuring device |
| CN105823936A (en) * | 2016-05-10 | 2016-08-03 | 国网山东省电力公司莱州市供电公司 | Telescopic current transformer rated ratio testing device |
| CN106501610A (en) * | 2016-11-02 | 2017-03-15 | 王飞 | A kind of switch cabinet bus fully-automated synthesis equipment |
| US20190170793A1 (en) * | 2017-12-05 | 2019-06-06 | Hitachi Metals, Ltd. | Current sensor |
| CN108614144A (en) * | 2018-05-08 | 2018-10-02 | 国网江西省电力有限公司电力科学研究院 | A kind of current sensor based on automatic biasing magnetic electric compound material |
| CN110857950A (en) * | 2018-08-22 | 2020-03-03 | 力诚仪器股份有限公司 | Current sensing module for current sensor and manufacturing method thereof |
| CN209247826U (en) * | 2018-09-30 | 2019-08-13 | 青岛特锐德电气股份有限公司 | A kind of copper bar support device |
| CN110333378A (en) * | 2019-05-31 | 2019-10-15 | 国网江西省电力有限公司电力科学研究院 | A kind of magnetoelectricity laminate current sensor device based on magnetic convergence effect |
| CN110635378A (en) * | 2019-10-16 | 2019-12-31 | 国网辽宁省电力有限公司抚顺供电公司 | Change 10kV cubical switchboard current transformer auxiliary device |
| CN110927432A (en) * | 2019-12-17 | 2020-03-27 | 江西云泰铜业有限公司 | Current measuring device of copper bar type wire |
| CN111123175A (en) * | 2020-03-30 | 2020-05-08 | 江西科技学院 | Magnetic variable measuring device and measuring method thereof |
| CN111537926A (en) * | 2020-05-20 | 2020-08-14 | 河北工业大学 | Measuring system and measuring method suitable for multi-scene space magnetic field |
Non-Patent Citations (1)
| Title |
|---|
| 李东昇: "新型高压开关柜电流测量及电磁场模拟仿真", 《中国优秀硕士论文全文数据库》, 15 March 2016 (2016-03-15), pages 32 - 45 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101297200B1 (en) | Point detecting type current measuring device having function of compensating interference by adjacent bus bar | |
| US10613123B2 (en) | Method and apparatus for power quality and synchrophasor monitoring on power lines | |
| CN106405230B (en) | Frequency measurement method and device | |
| Si et al. | Method and experimental study of voltage measurement based on electric field integral with Gauss–Legendre algorithm | |
| CN108362928A (en) | Contact net voltage non-contact type measuring device and method | |
| CN102944745A (en) | Insulator detector for live-line operation of 750kV line | |
| WO2017113754A1 (en) | Method for detecting dynamic reactive power of grid and reactive power detector | |
| CN108696170B (en) | Frequency finite aggregate model predictive control method is determined for two level three-phase inverters | |
| CN106096161B (en) | The emulated computation method of power transmission line power frequency induced voltage and electric current | |
| CN103471735A (en) | Power battery pack internal temperature online detection method and system | |
| CN106249038A (en) | A kind of General portable far-end high-power rudder electromechanics pressure, current measurement and calibrating installation | |
| CN112666377A (en) | Cubical switchboard three-phase generating line current measuring device | |
| CN102809687A (en) | Digital measurement method for alternating-current frequency | |
| CN102981061A (en) | Direct earth capacitance gauge in converting station power distribution system | |
| CN202886473U (en) | 750-kV insulator detector for line hot-line work | |
| EP3033822B1 (en) | Power system control | |
| CN104062501B (en) | Double-transformer substation harmonic wave state estimation method | |
| CN207571192U (en) | A kind of numerically-controlled machine tool energy consumption data device for testing and analyzing | |
| Weiss et al. | Eddy current loss calculation in multiconductor systems | |
| CN202837152U (en) | Corrosion test device for galvanic couple in soil medium | |
| CN106018927B (en) | A kind of phase three-wire three phase-voltage measurement method | |
| CN108334822A (en) | Kalman based on electric vehicle charging nonlinear-load feature and amendment wavelet transform filtering method | |
| CN208432708U (en) | A kind of multichannel string type inverter test device | |
| CN104050360B (en) | Calculating method of loss of harmonic current of electric transmission line in three-phase three-wire system | |
| CN206362620U (en) | A kind of grip device of the quick-fried explosion-proof aluminum casing pressure of test point |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210416 |
|
| RJ01 | Rejection of invention patent application after publication |