CN218481602U - Distribution-type current measuring device for transformer area - Google Patents
Distribution-type current measuring device for transformer area Download PDFInfo
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- CN218481602U CN218481602U CN202222411306.9U CN202222411306U CN218481602U CN 218481602 U CN218481602 U CN 218481602U CN 202222411306 U CN202222411306 U CN 202222411306U CN 218481602 U CN218481602 U CN 218481602U
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Abstract
The utility model discloses a platform district distributing type current measurement device, including the measurement ring, wherein: the output end of the metering ring is electrically connected with the input end of the integrator; the output end of the integrator is electrically connected with the input end of the alternating current-direct current conversion unit; the output end of the alternating current-direct current conversion unit is electrically connected with the input end of the control unit; the control unit is electrically connected with a wireless communication module; the integrator, the control unit and the wireless communication module are respectively and electrically connected with the power supply module; the measuring ring is sleeved on a cable of the measured platform area. The utility model has the advantages that: the problem of low pressure platform district side narrow environment current pincers be difficult to use and the uncertain action of line loss is difficult to the investigation fixed is solved, measure accurate, convenient to use, intelligent degree is high, and is safe firm, can be applicable to various use scenarios.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a distributed current measuring device for a transformer area.
Background
At present, in the process of analyzing the electric quantity loss and the potential safety hazard of a high-loss transformer area by electric inspection personnel, firstly, when a user side is checked, the current of a line of the user side entering the house is measured by using a clamp-type ammeter, and then the current is compared with the current of the ammeter to judge. For the electric quantity loss at the low-voltage transformer area side in the range from the outlet of the transformer to the electric meter box, a method for comparing the currents at two ends of a clamp-on ammeter field sectional card is generally adopted.
The method for comparing the current of the clamp-on current meter has the problems that the data are asynchronous and only rough judgment can be carried out; meanwhile, the method can only be effective on the site with high loss problems such as electric quantity loss, potential safety hazard and the like. In actual work, electric quantity abnormal loss modes have diversity, for example, hidden engineering night electricity stealing or when an electricity stealing user detects that power supply company workers are on-site troubleshooting, a power stealing line is disconnected, a cable sheath is damaged, an overhead line discharges electricity to the ground but is not serious or intermittent, three-phase individual time periods are seriously unbalanced, and the like.
The patent with the publication number of CN112130018A discloses a line loss inspection device, which comprises a line and a line loss inspection device, wherein an electric energy meter is installed on the line, and a first current transformer is installed on the line on one side of the electric energy meter; the line loss inspection device is electrically connected with four pincerlike ampere meters, and is provided with a first current transformer and a line loss inspection device, so that secondary currents of all the current transformers are collected on one device, the difference value of currents of a main transformer and a sub transformer is automatically calculated, the line loss inspection device can send data with the current difference value larger than 0.2A in a short message or wireless mode, and the loss reason of the electric quantity of a low-voltage line in a transformer area can be quickly found out.
However, due to the size and type limitations of the clamp-on ammeter, in a part of sites, especially in a cable branch box with a narrow space, the ABC three phases are arranged tightly, the clamp-on ammeter is difficult to penetrate through gaps and cannot be detected and checked, in the case of electricity stealing, the electricity stealing behavior is recovered by an electricity stealing person after a detection person arrives at the site, and the detection person starts to walk behind, in such a situation, the detection person of a power supply company is difficult to fix evidence and confirm problems, sometimes, the position of line loss is difficult to have intuitive feeling, and the follow-up arrangement cannot be performed according to the situation of line loss.
Disclosure of Invention
The utility model provides a be not enough to prior art, the utility model provides a measure accurate, convenient to use, intelligent degree height, safe firm, can be applicable to the platform district distributing type current measuring device of various use scenes to solve above-mentioned pincerlike table and be difficult for the fixed problem of investigation of the uncertain action of line loss in the difficult use of low pressure platform district end.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
a distribution-type current measuring device comprises a metering ring, wherein the output end of the metering ring is electrically connected with the input end of an integrator; the output end of the integrator is electrically connected with the input end of the alternating current-direct current conversion unit; the output end of the alternating current-direct current conversion unit is electrically connected with the input end of the control unit; the control unit is electrically connected with a wireless communication module; the integrator, the control unit and the wireless communication module are respectively electrically connected with the power supply module; and the measuring ring is sleeved on the cable of the measured platform area.
Preferably, the input end of the control unit is electrically connected with at least one set of alternating current-direct current conversion unit, integrator and metering ring.
Preferably, the metering ring is a rogowski coil and is fixedly connected to a cable of the measured platform area through an annular bracket.
Preferably, the rogowski coil is a flexible hollow ring-shaped coil.
Preferably, the annular bracket comprises a clamp, a fastening bolt column and a fixing clip; the clamp comprises two semicircular rings, a connecting seat and a fixing bolt, wherein the connecting seat is arranged at two ends of each semicircular ring, and the two semicircular rings are detachably and fixedly connected through the fixing bolt arranged on the connecting seat; the circumferential surface of the hoop is connected with a plurality of fastening bolt columns in a circumferential array through threaded holes; the central axis of the fastening bolt column is perpendicular to the central axis of the hoop; a plurality of fixing clips in a circumferential array are arranged on the end face of the hoop; the fixing clip is connected with the metering ring in an interference fit manner.
Preferably, the fixed card is a line card, the cross section of the line card is a section of major arc, and the metering ring is clamped in the line cards.
Preferably, the control unit is a single-chip microcontroller; the wireless communication module is in communication connection with the cloud server, the cloud server is in wireless communication connection with the terminal device, and the terminal device is a smart phone or a personal computer.
Preferably, the wireless communication module is a mobile communication cellular internet of things module.
Preferably, the power module includes a rechargeable battery and a power management chip electrically connected to each other, and the power management chip is electrically connected to the power input terminals of the integrator, the control unit, and the wireless communication module, respectively.
Preferably, the rechargeable battery uses a lithium battery.
The Rogowski coil is a hollow annular coil, has two types of rigidity and flexibility, and can be directly sleeved on a conductor to be measured to measure alternating current. The theoretical basis of the Rogowski coil for measuring the current is Faraday's law of electromagnetic induction and ampere 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 output voltage of the Rogowski coil is in direct proportion to the differential of the measured current, and the output voltage in direct proportion to the primary current can be obtained by outputting the differential through an integrator.
To sum up, for prior art, the utility model discloses, beneficial effect lies in: the flexible Rogowski coil can conveniently extend into a cable gap in a cable branch box of which a pincerlike meter is difficult to penetrate through a low-voltage station area side, the Rogowski coil can be accurately fixed on a cable to be tested through a unique annular support design, the measurement is more accurate, the optimal arc design of a line card can effectively protect the Rogowski coil, so that the Rogowski coil is difficult to be scratched, the device can simultaneously test multiple groups of data and compare the data by arranging multiple groups of metering rings, integrators and direct current conversion units at the front end of a control unit, for example, one group is arranged at the inlet end of the cable branch box, one group is also respectively arranged at each outlet end, and each group transmits the measured current value back to a cloud server background through a wireless communication module, the backstage through the sum of the comparison incoming line end electric current and the terminal outgoing line multiunit current value of same time and refer to a long-time current record come to judge the line loss condition, if the difference is close to zero, then the platform district line loss is normal, otherwise, it is unusual to explain line loss, for example, there is the action of stealing electricity or the impaired electric leakage of circuit, need investigate, also can use two sets of check whether an independent section cable has the line loss, in addition, this device also can use on-the-spot copper bar to get electricity through power management chip and carry out work, when equipment dismantles convenient demand, can convert rechargeable battery power supply into, it is more nimble to use, through using the lithium cell, the convenience of charging and the time of endurance of device can all obtain better assurance, through mobile communication honeycomb thing allies oneself with the module, can make this device break away from the constraint of wireless local area network, guarantee real-time and the stability of electric current data upload. In conclusion, the device can effectively reduce the arrangement and allocation of on-site patrol personnel of a power supply company, basically realizes the unattended use, is convenient to use, has high intelligent degree, is safe and stable, and can be suitable for various use scenes.
Drawings
Fig. 1 is a schematic diagram of the system structure of the present invention;
FIG. 2 is a schematic perspective view of the ring support of the present invention;
FIG. 3 is a schematic view of the connection structure of the ring-shaped support and the metering ring of the present invention;
fig. 4 is a reference diagram of the usage state of the ring-shaped bracket of the invention;
the device comprises a cable, a metering ring, an integrator, an alternating current-direct current conversion unit, a control unit, a wireless communication module, a 7-annular support, a hoop, a fastening bolt column and a fixing clamp, wherein the cable is 0-1-the metering ring, the integrator is 2-the metering ring, the alternating current-direct current conversion unit is 3-the control unit, the wireless communication module is 5-the annular support is 7-the hoop, the fastening bolt column is 72-and the fixing clamp is 73-the fixing clamp.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
The embodiment provides a technical scheme that: the distributed current measuring device of a platform district of the invention, including measuring the ring 1, wherein: the output end of the metering ring 1 is electrically connected with the input end of the integrator 2; the output end of the integrator 2 is electrically connected with the input end of the alternating current-direct current conversion unit 3; the output end of the AC-DC conversion unit 3 is electrically connected with the input end of the control unit 4; the control unit 4 is electrically connected with a wireless communication module 5; the integrator 2, the control unit 4 and the wireless communication module 5 are respectively electrically connected with the power supply module 6; the metering ring 1 is sleeved on a cable of a tested platform area. The measuring ring 1 is a Rogowski coil and is fixedly connected to a cable of a measured platform area through an annular bracket 7; the annular bracket 7 comprises a hoop 71, a fastening bolt column 72 and a fixing clamp 73; the clamp 71 comprises two semicircular rings, connecting seats and fixing bolts, wherein the connecting seats are arranged at two ends of the two semicircular rings, and the two semicircular rings are detachably and fixedly connected through the fixing bolts arranged on the connecting seats; the circumferential surface of the hoop 71 is connected with a plurality of fastening bolt columns 72 in a circumferential array through threaded holes; the central axis of the fastening bolt column 72 is vertical to the central axis of the clamp 71; a plurality of fixing clips 73 in a circumferential array are arranged on the end surface of the hoop 71; the fixing clip 73 is connected with the metering ring 1 in an interference fit manner; the fixing clips 73 are line clips, the cross sections of the fixing clips 73 are sections of major arcs, and the metering ring 1 is clamped in the fixing clips 73.
And four sets of the alternating current-direct current conversion unit 3, the integrator 2 and the metering ring 1 are arranged by default, wherein the input ends of the control unit 4 are sequentially and electrically connected.
When the device is used, the metering ring 1 transmits measured current data to the integrator 2, an output signal of the integrator 2 is the time integral of an input signal, the integrator 2 can be regarded as a continuous version of a counter, the input from the metering ring 1 can be accumulated and then output to the alternating current-direct current conversion unit 3, and a signal is converted from AC to DC and then reaches the control unit 4.
The control unit 4 is a single-chip microcontroller; the wireless communication module 5 is in communication connection with a cloud server, the cloud server is in wireless communication connection with terminal equipment, and the terminal equipment comprises a smart phone or a personal computer. The power module comprises a rechargeable battery and a power management chip which are electrically connected with each other, and the power management chip is electrically connected with the integrator 2, the control unit 4 and the wireless communication module 5 respectively. The wireless communication module (5) is a mobile communication cellular internet of things module and can be internally provided with real-time positioning functions such as a GPS and the like.
When arranging a plurality of at the scene the utility model discloses a platform district distributing type current measuring device, control unit 4 acquires current data back real-time current data propelling movement to cloud server through wireless communication module 5 with specific time quantum, and this data can be examined and the record by cloud server, and the inspection personnel can acquire this data from wireless communication's cloud server with it through terminal equipment like smart mobile phone or personal computer, judge whether real emergence of line loss and confirm the exact position of line loss through the application on smart mobile phone or the personal computer.
In this embodiment, the single-chip microcontroller used by the control unit 4 uses an STM32 single-chip microcomputer of an ideographic semiconductor, the ac/dc conversion unit 3 uses a WB5812A ac/dc conversion chip of mianyangweibo electronics, the integrator 2 uses an LMV325I DR chip, the lithium battery uses a lithium battery with a 2200mAh specification, and the mobile communication cellular internet of things module of the wireless communication module 5 uses a remote EC200U module.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A platform district distributed current measuring device, includes measurement ring (1), its characterized in that: the output end of the metering ring (1) is electrically connected with the input end of the integrator (2); the output end of the integrator (2) is electrically connected with the input end of the alternating current-direct current conversion unit (3); the output end of the alternating current-direct current conversion unit (3) is electrically connected with the input end of the control unit (4); the control unit (4) is electrically connected with a wireless communication module (5); the integrator (2), the control unit (4) and the wireless communication module (5) are respectively electrically connected with the power supply module (6); the metering ring (1) is sleeved on a cable (0) of the measured platform area.
2. The block distributed current measurement device of claim 1, wherein: the alternating current-direct current conversion unit (3), the integrator (2) and the metering ring (1) that the input end of the control unit (4) is sequentially electrically connected are not less than one set.
3. The block distributed current measurement apparatus of claim 1, wherein: the metering ring (1) is a Rogowski coil and is fixedly connected to a cable (0) of a measured platform area through an annular support (7).
4. The block distributed current measurement apparatus of claim 3, wherein: the Rogowski coil is a flexible hollow annular coil.
5. The block distributed current measurement apparatus of claim 3, wherein: the annular bracket (7) comprises a hoop (71), a fastening bolt column (72) and a fixing clip (73); the clamp (71) consists of two semicircular rings, a connecting seat and a fixing bolt, wherein the connecting seat is arranged at two ends of each semicircular ring, and the two semicircular rings are detachably and fixedly connected through the fixing bolt arranged on the connecting seat; the circumferential surface of the hoop (71) is connected with a plurality of tightening bolt columns (72) in a circumferential array through threaded holes; the central axis of the fastening bolt column (72) is perpendicular to the central axis of the hoop (71); a plurality of fixing clips (73) in a circumferential array are arranged on the end surface of the hoop (71); the fixing clip (73) is connected with the metering ring (1) in an interference fit manner.
6. The block distributed current measurement apparatus of claim 5, wherein: the fixing cards (73) are line cards, the cross sections of the line cards are sections of major arcs, and the metering rings (1) are clamped in the line cards.
7. The block distributed current measuring apparatus according to any one of claims 1 to 6, wherein: the control unit (4) is a single-chip microcontroller; the wireless communication module (5) is in communication connection with the cloud server, the cloud server is in wireless communication connection with the terminal device, and the terminal device is a smart phone or a personal computer.
8. The block distributed current measuring apparatus of any one of claims 1 to 6, wherein: the wireless communication module (5) is a mobile communication cellular Internet of things module.
9. The block distributed current measuring apparatus according to any one of claims 1 to 6, wherein: the power supply module (6) comprises a rechargeable battery and a power supply management chip which are electrically connected with each other, and the power supply management chip is electrically connected with the power supply input ends of the integrator (2), the control unit (4) and the wireless communication module (5) respectively.
10. The block distributed current measurement apparatus of claim 9, wherein: the rechargeable battery uses a lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222411306.9U CN218481602U (en) | 2022-09-13 | 2022-09-13 | Distribution-type current measuring device for transformer area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222411306.9U CN218481602U (en) | 2022-09-13 | 2022-09-13 | Distribution-type current measuring device for transformer area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218481602U true CN218481602U (en) | 2023-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222411306.9U Active CN218481602U (en) | 2022-09-13 | 2022-09-13 | Distribution-type current measuring device for transformer area |
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| CN (1) | CN218481602U (en) |
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- 2022-09-13 CN CN202222411306.9U patent/CN218481602U/en active Active
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