Intelligent collector for insulation monitoring of alternating-current medium-voltage system

Abstract

The utility model discloses an intelligent collector used for insulation monitoring of an AC medium voltage system, the intelligent collector comprises a box body and a box cover, the box body is provided with a control panel, and the box body is internally provided with a power supply board, a control board, a signal amplification board, a filter, a transformer and the like. The intelligent collector provided by the utility model can collect a leakage current signal in a neutral point ungrounded power network, locates a fault point of a load branch, and is convenient for maintenance and debugging of the power network; the circuit board can be plugged up and down, so that the circuit board is convenient to maintain and replace; the box body is divided into different subareas, so that electromagnetic interference among different components can be effectively reduced, and the working stability of equipment is improved; functional modularization and position layout are carried out, so that the creepage distance and the electrical clearance of a medium-voltage system can be met, the anti-interference capability of equipment is enhanced, and maintenance and debugging are facilitated; the device has the advantages of interference resistance, convenience in maintenance, large operation space, high structural stability and the like.

Description

Technical Field

[0001] The utility model relates to the field of power grid fault location, in particular to an intelligent collector for insulation monitoring of an AC medium voltage system. Background Art

[0002] In a ship power system, the ungrounded neutral point method is generally used to reduce the overload current during the ground short circuit of the power system, keep the three-phase power of the system balanced, thus ensure the safety of the system, and maintain the stability and continuity of the system power supply.

[0003] Therefore, studying the monitoring problem of the insulation state of the AC medium voltage power network, and timely locating the fault point of the load branch and solving the problem when the power network fails is of great significance for ensuring the normal operation of the power network, the power supply continuity of the power system, and reducing the labor intensity of the staff.

[0004] In practical applications, especially in the scenario of a ship operating at sea, the intelligent collector faces many challenges. The hull is easily affected by shaking at sea, and the working environment is under high salt and high humidity conditions. These factors make the electronic components in the intelligent collector have a certain possibility of damage and repair. However, the existing technology has problems of complex and difficult operation when repairing the intelligent collector. Summary of the Utility Model

[0005] In view of the above deficiencies in the current technology, the utility model provides an intelligent collector for insulation monitoring of an AC medium voltage system, which can collect unbalanced current signals of the power network, locate the fault point, facilitate the maintenance and debugging of the power network, and has the advantages of anti-interference, easy maintenance, large operation space, and strong structural stability.

[0006] To achieve the above object, the embodiments of the utility model adopt the following technical solutions:

[0007] An intelligent collector for insulation monitoring of an AC medium voltage system, the intelligent collector includes a box body with a hollow interior and a box cover detachably connected to the box body. A control panel is arranged on the outer wall of the box body, and a partition board, a circuit board, and a power conversion component are arranged inside the box body; the box body is divided into a first partition and a second partition by the partition board; the first partition includes at least two symmetrically arranged inner walls, the circuit board is connected between the two inner walls, and vertical circuit board slots are arranged on the inner walls, and the circuit board is detachably fixed in the circuit board slots; the second partition includes fixing holes, and the power conversion component is installed in the second partition through the fixing holes.

[0008] According to one aspect of the utility model, a power switch, a fuse, and a plurality of electrical connectors are arranged on the control panel.

[0009] According to one aspect of the present utility model, the electrical connector includes a grounding terminal, a two-core electrical connection, and a plurality of four-core electrical connections; the two-core electrical connection, the fuse, and the power switch are connected in sequence.

[0010] According to one aspect of the present utility model, the circuit board includes: a power supply board, a control board, and a signal amplification board; the power supply board is respectively connected to the control board and the signal amplification board, the control board is connected to the signal amplification board, and the control panel is connected to the power supply board, the control board, and the signal amplification board.

[0011] According to one aspect of the present utility model, the power conversion component includes: a filter and a transformer; the filter, the transformer, and the power supply board are connected in sequence.

[0012] According to one aspect of the present utility model, the box body includes an inner shell; a vertical circuit board slot is provided on one side of the inner shell opposite to the first partition and the partition board for installing the circuit board; fixing holes are provided on one side of the inner shell opposite to the second partition and the partition board for installing the power conversion component; partition board slots corresponding in position are provided on two sides of the inner shell parallel to the control panel for installing the partition board.

[0013] According to one aspect of the present utility model, the box cover is detachably installed at the top end of the box body through fasteners.

[0014] According to one aspect of the present utility model, a cable port for accommodating a cable to pass through is provided on the partition board.

[0015] According to one aspect of the present utility model, fixing plates are provided at the four corners of the bottom of the box body, and the fixing plates are provided with fixing holes.

[0016] According to one aspect of the present utility model, the partition board is a metal partition board, and the partition board is used to reduce electromagnetic interference between the circuit board and the power conversion component.

[0017] Advantages of the implementation of the present utility model:

[0018] The technical solution provided by the present utility model provides an intelligent collector for insulation monitoring in an AC medium-voltage system, which can collect leakage current signals in a non-grounded neutral power network, locate the fault points of the load branches, and facilitate the maintenance and debugging of the power network.

[0019] The intelligent collector provided by this application fixes the circuit board in the circuit board slot in a pluggable manner inside the box body. While ensuring that the fixed circuit board does not shake, the circuit board can be easily inserted and removed vertically, thus facilitating the maintenance and replacement of the circuit board. By setting up a filter, it can effectively eliminate the power supply clutter interference signal, effectively improve the electromagnetic compatibility of the device and the reliability of the device operation. By setting up a partition board to divide the box body into different partitions, it can effectively reduce the electromagnetic interference between different components and increase the working stability of the device.

[0020] Applying the intelligent collector provided by this application for functional modularization and position layout can meet the creepage distance and electrical clearance of the medium-voltage system, enhance the anti-interference ability of the device, and facilitate maintenance and debugging.

[0021] The intelligent collector provided by this application has the advantages of anti-interference, easy maintenance, large operating space, and strong structural stability. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 It is an exploded structural schematic diagram of an intelligent collector for insulation monitoring of an AC medium-voltage system according to the present utility model;

[0024] Figure 2 It is a three-dimensional structural schematic diagram of an intelligent collector for insulation monitoring of an AC medium-voltage system according to the present utility model;

[0025] Figure 3 It is a three-dimensional cross-sectional view of an intelligent collector for insulation monitoring of an AC medium-voltage system according to the present utility model.

[0026] Reference Numerals: 1, box body; 2, box cover; 3, control panel; 4, partition board; 5, circuit board; 6, power conversion component; 7, fixing plate; 31, power switch; 32, fuse; 331, grounding terminal; 332, 2-core electrical connection; 333, 4-core electrical connection; 51, power supply board; 52, control board; 53, signal amplification board; 61, filter; 62, transformer. Detailed Description of the Embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment 1

[0029] As Figure 1 、 2 As shown in

[0030] and 3, an intelligent collector for insulation monitoring of an AC medium voltage system, the intelligent collector includes a box body 1 with a hollow interior and a box cover 2 detachably connected to the box body 1. A control panel 3 is provided on the outer wall of the box body 1, and a partition board 4, a circuit board 5, and a power conversion component 6 are provided inside the box body 1; the box body 1 is divided into a first partition and a second partition by the partition board 4; the first partition includes at least two symmetrically arranged inner walls, the circuit board 5 is connected between the two inner walls, and vertical circuit board grooves are provided on the inner walls, and the circuit board 5 is detachably fixed in the circuit board grooves; the second partition includes fixing holes, and the power conversion component 6 is installed in the second partition through the fixing holes.

[0031] Preferably, the box cover 2 is detachably installed on the top of the box body 1 through fasteners, and the fasteners are generally bolts.

[0032] The control panel 3 is connected to the power board 51 to supply power to the power board 51. In actual application, the power board 51 converts external power supply into direct current output, and the direct current output by the power board 51 is ±5V to supply power to the control board 52 and the signal amplification board 53.

[0033] The control panel 3 is connected to an external power network. The signal amplification board 53 amplifies the signal of the external power network input by the control panel 3 and outputs it to the control board 52. The control board 52 collects and calculates the signal to analyze whether there is a fault in the external power network branch.

[0034] In actual application, a connector is provided on the control panel 3, which can be connected to an external current sensor to collect the unbalanced current in the power network and transmit it to the signal amplification board 53. The signal amplification board 53 amplifies the collected current signal and converts it into a voltage signal, which is transmitted to the control board 52.

[0035] The control board 52 collects the voltage signals transmitted by the signal amplification board 53 of the calculation signal, and analyzes whether there is a fault in the power network branch connected to the intelligent collector.

[0036] The working principle of the intelligent collector is as follows: The control panel 3 is connected to an external current sensor. When there is a problem in the power network, a leakage current will be generated. The current sensor senses the leakage current in the power network and transmits it to the signal amplification board 53 through the control panel 3; then the current signal is amplified by the signal amplification board 53 and converted into a voltage signal, which is transmitted to the control board 52; the control board 52 collects and calculates the voltage signal, analyzes whether there is a fault in the power network branch connected to the intelligent collector, and thus locates the fault point of the load branch.

[0037] The beneficial effects of this embodiment are as follows: This intelligent collector can collect and analyze the leakage current in the power network, locate the fault point of the load branch, and facilitate the maintenance and debugging of the power network. By setting a circuit board slot inside the box body, the circuit board is fixed in the circuit board slot in a pluggable manner. While the circuit board will not shake when fixed, the circuit board can be easily inserted and removed up and down, thus facilitating the maintenance and replacement of the circuit board; by setting a partition board, the box body is divided into different partitions, which can effectively reduce the electromagnetic interference between different components and increase the working stability of the equipment. This intelligent collector has a box cover that can be detachably installed on the box body, and the box cover can be opened to repair and replace the internal components, making disassembly, installation, maintenance, and repair more convenient.

[0038] Embodiment 2

[0039] As Figure 1 、 2 As shown in and 3, an intelligent collector for insulation monitoring of an AC medium-voltage system, the intelligent collector includes a box body 1 with a hollow interior and a box cover 2 detachably connected to the box body 1. A control panel 3 is provided on the outer wall of the box body 1. A partition board 4, a circuit board 5, and a power conversion component 6 are provided inside the box body 1; the box body 1 is divided into a first partition and a second partition by the partition board 4; the first partition includes at least two symmetrically arranged inner walls, the circuit board 5 is connected between the two inner walls, and vertical circuit board slots are provided on the inner walls, and the circuit board 5 is fixed in the circuit board slots in a pluggable manner; the second partition includes fixing holes, and the power conversion component 6 is installed in the second partition through the fixing holes.

[0040] The control panel 3 is provided with a power switch 31, a fuse 32, and a number of electrical connectors.

[0041] The electrical connectors include a grounding terminal 331, a 2-core electrical connection, and a number of 4-core electrical connections; the 2-core electrical connection, the fuse 32, and the power switch 31 are connected in sequence.

[0042] The circuit board 5 includes: a power supply board 51, a control board 52, and a signal amplification board 53; the power supply board 51 is respectively connected to the control board 52 and the signal amplification board 53, the control board 52 is connected to the signal amplification board 53, and the control panel 3 is connected to the power supply board 51, the control board 52, and the signal amplification board 53.

[0043] The control panel 3 is connected to an external power network. The signal amplification board 53 amplifies the signal of the external power network input by the control panel 3 and outputs it to the control board 52. The control board 52 collects and calculates the signal to analyze whether there is a fault in the external power network branch.

[0044] The power conversion component 6 includes: a filter 61 and a transformer 62; the filter 61, the transformer 62, and the power supply board 51 are connected in sequence.

[0045] Preferably, the box body 1 includes an inner shell; a vertical circuit board slot is provided on one side of the inner shell opposite to the partition board 4 in the first partition for installing the circuit board 5; fixing holes are provided on one side of the inner shell opposite to the partition board 4 in the second partition for installing the power conversion component 6; partition board slots corresponding in position are provided on two sides of the inner shell parallel to the control panel for installing the partition board 4.

[0046] The box cover 2 is detachably installed at the top end of the box body 1 through fasteners, and the fasteners are generally bolts.

[0047] Preferably, a cable port for accommodating cables to pass through is provided on the partition board 4.

[0048] Preferably, fixing plates 7 are provided at the four corners of the bottom of the box body 1, and the fixing plates 7 are provided with fixing holes. During actual use, bolts can be used to fix the intelligent collector in a certain position by using the fixing holes.

[0049] Preferably, the partition board 4 is a metal partition board, and the partition board 4 is used to reduce electromagnetic interference between the circuit board 5 and the power conversion component 6.

[0050] In this embodiment, a grounding terminal, one 2-core electrical connection, and six 4-core electrical connection joints are provided on the control panel 3. The grounding terminal is used for grounding to ensure the safe and stable operation of the intelligent collector. The six 4-core electrical connection joints have different functions.

[0051] The 2-core electrical connection, the fuse 32, and the power switch 31 are connected in sequence. The intelligent collector is turned on through the power switch 31 on the control panel 3, and the fuse 32 can provide overload protection for the intelligent collector to prevent internal components from being burned out.

[0052] The power switch 31, filter 61, transformer 62, and power supply board 51 are connected in sequence. The two-core electrical connection joint on the control panel 3 is connected to an external 220V AC power supply. The AC power supply passes through the filter 61 and transformer 62 and is supplied to the power supply board 51. The power supply board 51 converts the alternating current into direct current and outputs ±5V direct current to power the control board 52 and signal amplification board 53.

[0053] The four-core electrical connection on the control panel 3 has a joint connected to the signal amplification board 53. The four-core electrical connection on the control panel 3 also has a joint for connecting an external current sensor, which can connect to an external current sensor to collect the unbalanced current in the power grid and transmit it to the signal amplification board 53. The signal amplification board 53 amplifies the collected current signal and converts it into a voltage signal, which is transmitted to the control board 52.

[0054] The control board 52 collects and calculates the voltage signal transmitted by the signal amplification board 53 and analyzes whether there is a fault in the power grid branch where the intelligent collector is connected.

[0055] The four-core electrical connection on the control panel 3 also includes a communication joint, which can be connected to an external host device for communication.

[0056] The working principle of the intelligent collector is as follows: The four-core electrical connection on the control panel 3 is connected to an external current sensor. When there is a problem in the power grid, a leakage current will be generated. The current sensor senses the leakage current in the power grid and transmits it to the signal amplification board 53 through the four-core electrical connection; then the current signal is amplified by the signal amplification board 53 and converted into a voltage signal, which is transmitted to the control board 52; the control board 52 collects and calculates the voltage signal and analyzes whether there is a fault in the power grid branch where the intelligent collector is connected, thereby locating the fault point of the load branch.

[0057] The beneficial effects of this embodiment are as follows: This intelligent collector can collect and analyze the leakage current in the power grid, locate the fault point of the load branch, and facilitate the maintenance and debugging of the power grid. This intelligent collector converts the external AC power supply into internal available DC power to provide power for internal components. This intelligent collector has a box cover that can be detachably installed on the box body, and the box cover can be opened to repair and replace internal components, making disassembly, installation, maintenance, and repair more convenient. There are also fixing plates and fixing holes provided at the bottom of this intelligent collector, which are convenient for installation and fixation. The overall structure of this intelligent collector is simple, easy to manufacture and process, and convenient to use.

[0058] As described above, only the specific implementation manners of the present invention are provided, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. An intelligent collector for insulation monitoring of an AC medium voltage system, the intelligent collector comprising a hollow box (1) and a box cover (2) detachably connected to the box (1), characterized in that: A control panel (3) is arranged on the outer wall of the box (1), and a partition plate (4), a circuit board (5) and a transformer assembly (6) are arranged inside the box (1); the box (1) is divided into a first partition and a second partition by the partition plate (4); the first partition comprises at least two symmetrically arranged inner walls, the circuit board (5) is connected between the two inner walls, a vertical circuit board slot is arranged on the inner wall, and the circuit board (5) is pluggably fixed in the circuit board slot; the second partition comprises a fixing hole, and the transformer assembly (6) is installed in the second partition through the fixing hole.

2. The intelligent collector according to claim 1, characterized in that: The control panel (3) is provided with a power switch (31), a fuse (32), and a plurality of electrical connectors.

3. The intelligent collector according to claim 2, characterized in that: The electrical connector comprises a grounding terminal (331), a 2-core electrical connector (332), and a plurality of 4-core electrical connectors (333); the 2-core electrical connector (332), a fuse (32), and a power switch (31) are connected in sequence.

4. The intelligent collector according to claim 1, characterized in that: The circuit board (5) comprises: a power board (51), a control board (52), and a signal amplifying board (53); the power board (51) is connected to the control board (52) and the signal amplifying board (53), respectively; the control board (52) is connected to the signal amplifying board (53); and the control panel (3) is connected to the power board (51), the control board (52), and the signal amplifying board (53).

5. The intelligent collector according to claim 1, characterized in that: The power conversion component (6) comprises: a filter (61) and a transformer (62); the filter (61), the transformer (62) and the power supply board (51) are connected in sequence.

6. The intelligent collector according to claim 1, characterized in that: The box body (1) comprises an inner shell; a vertical circuit board slot is provided on a side of the inner shell located in the first partition opposite to the partition plate (4), for installing a circuit board (5); a fixing hole is provided on a side of the inner shell located in the second partition opposite to the partition plate (4), for installing a transformer assembly (6); and partition plate slots corresponding in position are provided on both sides of the inner shell parallel to the control panel, for installing the partition plate (4).

7. The intelligent collector according to claim 1, characterized in that: The box cover (2) is detachably mounted on the top of the box body (1) via fasteners.

8. The intelligent collector according to claim 1, characterized in that: The partition plate (4) is provided with a cable opening for accommodating the passage of cables.

9. The intelligent collector according to claim 1, characterized in that: The four corners of the bottom of the box body (1) are provided with fixing plates (7), and the fixing plates (7) are provided with fixing holes.

10. The intelligent collector according to claim 1, characterized in that: The partition plate (4) is a metal partition plate, and the partition plate (4) is used to reduce electromagnetic interference between the circuit board (5) and the power conversion component (6).

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