CN219247538U - High-voltage distribution comprehensive protection device - Google Patents

Abstract

The utility model provides a high-voltage distribution comprehensive protection device, and belongs to the technical field of mining protectors; the problems of unstable signals, starting components and parts and imperfect functions of the existing comprehensive protector are solved, the comprehensive protector comprises an explosion-proof shell, a display is arranged on the front surface of the explosion-proof shell, a circuit breaker and a protector are arranged in the explosion-proof shell, the protector comprises a main control board, and a 32-bit MCU, a high-speed memory, a communication interface and a communication module are integrated on the main control board; the bus is led out from the mining cable, a disconnecting switch and a circuit breaker are arranged on the bus, and a high-voltage fuse, a voltage transformer and a low-voltage fuse are respectively connected to a three-phase bus at the output end of the disconnecting switch and then connected to the main control board; the switching-off and switching-on ports on the IO interface on the main control board are respectively connected with a switching-off button and a switching-on button through wires and then are connected with a switching-on and switching-off circuit inside the circuit breaker, wherein the circuit of the switching-on button is also connected with a far/near switching button in series; the utility model is applied to comprehensive protection of mine high-voltage power distribution.

Description

High-voltage distribution comprehensive protection device

Technical Field

The utility model provides a high-voltage distribution comprehensive protection device, and belongs to the technical field of mining power supply equipment.

Background

The underground coal mine high-voltage equipment is numerous, and a protector is required to be arranged for the high-voltage distribution equipment to protect and measure equipment such as a breaker and a motor and display detection values, so that the underground coal mine operation is high in construction difficulty and operation complexity, and the safety requirement for equipment operation is very strict. However, the existing comprehensive protector has the problems that signals are unstable, components are started and functions are imperfect, and the working temperature or state of the comprehensive protector cannot be monitored in real time, so that the structure of the existing product must be improved due to the consideration of underground safe operation of a coal mine, the technical index of main components is improved, the functions of a protection device are perfected, and the product can meet the technical performance requirements.

Disclosure of Invention

The utility model provides a high-voltage distribution comprehensive protection device, which aims to solve the problems that the existing comprehensive protector has unstable signals, imperfect starting of components and functions and incapability of monitoring the working temperature or state of the comprehensive protector in real time, and aims to realize the performance and functions of the high-voltage distribution comprehensive protector to meet the requirements under mines by improving hardware or improving the combined connection of hardware modules and/or circuits.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a high-voltage distribution synthesizes protection device, includes explosion-proof housing, explosion-proof housing openly is provided with the display, explosion-proof housing is inside to be provided with circuit breaker and protector, the protector includes the main control board, the integration has 32 bit MCU, high-speed memory, communication interface, communication module on the main control board, MCU passes through the wire and connects high-speed memory, communication interface, display respectively, MCU still passes through AD conversion module and links to each other with the current transformer that sets up on two-phase bus, the voltage transformer that is used for measuring three-phase voltage respectively;

the bus is led out from a mining cable, an isolation mechanism and a circuit breaker are arranged on the bus, a three-phase bus at the output end of the isolation mechanism is respectively connected with a high-voltage fuse and then is connected with the primary side of a voltage transformer, three-phase lines at the secondary side of the voltage transformer are respectively connected with a low-voltage fuse and then are connected with a main control board, and a leakage test button is connected in parallel with a line, which is positioned behind the low-voltage fuse, on a C-phase line at the secondary side of the voltage transformer;

the switching-off and switching-on ports on the IO interface on the main control board are respectively connected with the switching-off button and the switching-on button through wires and then are connected with a switching-on and switching-off circuit in the circuit breaker, wherein the circuit of the switching-on button is also connected with a far/near switching button in series, and one ends of the switching-off button and the switching-on button are respectively connected with the latching ports on the IO interface on the main control board;

the IO interface on the main control board is also provided with wind power input, gas input, a switch state, a circuit breaker trolley entering in place, a trolley retreating in place, a trolley advancing, remote control starting, remote control stopping, descending, determining and resetting ports which are respectively connected with wind power, a gas detection sensor, a circuit breaker chassis truck, a remote control starting button, a remote control stopping button, a shifting button, a determining button and a resetting button under a coal mine through wires.

And an insulation resistance test port and a power supply port are also arranged on the IO interface on the main control board, wherein the insulation resistance test port is connected with an insulation resistance monitoring device through a wire.

And the input and the output of the IO interface on the main control board are electrically isolated.

The communication module comprises a wired communication module and a wireless communication module, and the main control board is in bidirectional communication with the wireless remote controller through the wireless communication module.

The display is provided with a display screen, a shift button, a determination button, a reset button and a breaker charging indicator lamp.

The communication interface comprises an external communication interface, a 485 communication interface and an anti-override optical fiber interface, wherein the 485 communication interface is connected with the upper computer through a wire.

And the protector is communicated with a ground monitoring center through an RS485 or CAN bus communication interface.

Compared with the prior art, the utility model has the following beneficial effects: the intelligent comprehensive protector for high-voltage power distribution can safely, reliably and stably operate, can send electrical parameters, operation parameters, electric quantity information, equipment working conditions and fault information of underground electrical equipment to a dispatching center, and can also receive commands such as remote control, fixed value setting and the like sent by the dispatching center to realize remote operation.

Drawings

The utility model is further described below with reference to the accompanying drawings:

fig. 1 is a schematic circuit diagram of the present utility model.

Detailed Description

As shown in FIG. 1, the utility model provides a comprehensive protection device for high-voltage power distribution, which adopts a 32-bit high-performance MCU with the model of STM32F103, so that the device has strong real-time performance and reliability. The sampling density of 64 points per cycle and the frequency synchronous tracking technology enable the device to have high protection and measurement precision. The high-speed memory with high reliability is used for setting parameters, protecting fixed values and storing event records, the high-capacity memory is used for recording fault data, all data are not lost when power is lost, unlimited erasing and writing of electricity measurement are supported in real time (interval 1 s), and partial information is not lost due to sudden power failure of the device electricity measurement. All inputs and outputs of the protector are electrically isolated (including insulation resistance monitoring), and the electromagnetic compatibility is good. By matching with the wireless remote controller, operators can realize various operations and fixed value setting of the switch under the condition of no power failure in the pit. The intelligent power supply directly powered by the PT can ensure the reliable action of the protector after 20S of power failure, and the fault information is uploaded to the ground monitoring center, so that the influence of the power supply of the device on the PT is reduced due to the low-power consumption characteristic. The complete hardware self-detection and on-line detection functions, and the protection reliability is improved. The device has no adjustable element inside, which not only ensures the consistency, interchangeability and reliability of products, but also is convenient for users to use. The utility model organically integrates the mining power supply equipment technology and the automation technology, and ensures the reliable, safe and efficient realization of the functions.

The electrical schematic diagram of the utility model is shown in fig. 1, the following table 1 is the name of each component in fig. 1, and the utility model mainly comprises a current transformer, a voltage transformer, a main control board and a display. The hollow current transformer is selected and directly threaded on the two-phase bus, so that an electric signal proportional to the primary side current can be obtained. The voltage sensor signal is provided with a three-phase voltage (rated output voltage is 100V) by a transformer, namely, the transformation ratio is 6000/100 (or 10000/100, capacity 30 VA).

Table 1 the names of the components in fig. 1.

The protection device provided by the utility model can rapidly sample the acquired analog quantity and switching value and complete various operation processes, and can display the system current, the power grid line voltage value, the electric degree and the insulation resistance value on a display screen in real time; when faults occur, the tripping time CAN be determined according to the fault property, related fault parameters are memorized so as to be convenient for inquiry, and the fault tripping time CAN also be communicated with a ground monitoring center through an RS485 or CAN bus communication interface when necessary.

The working principle of the utility model is as follows: when the protection device is installed in the flameproof high-voltage switch, the front door must be closed before the switch is closed, the grounding switch device is positioned at the opening position, the isolation device (the circuit breaker handcart) is positioned at the in-place position, the front door locking switch is positioned at the closing position, the circuit breaker is charged completely, the display charging indicator lights are lightened, the self-checking is completed after the protector is electrified, the nodes 410 and 411 are connected, the closing button is pressed, and then the switch can be closed, otherwise, the switch cannot be closed.

The protection device has the advantages of strict design, reliable component selection, excellent production process, special treatment, vibration resistance, interference resistance, corrosion resistance, safety, stability, low power consumption and the like. The explosion-proof type safety protection device can be installed in a series of mining explosion-proof type high-voltage switch cabinets such as BGP (Border gateway protocol) and PBG (public switched telephone network), the protection function of the protector can be set at any time through simple operation, various information on a display screen can be observed through an explosion-proof switch window, and the buttons on the switch body can finish setting and testing of various protection functions of the protector under the condition that a switch shell is not opened on site, so that the safety, reliability and stability of the comprehensive protection device are realized.

The specific structure of the utility model needs to be described that the connection relation between the component modules adopted by the utility model is definite and realizable, and besides the specific description in the embodiment, the specific connection relation can bring about corresponding technical effects, and on the premise of not depending on execution of corresponding software programs, the technical problems of the utility model are solved, the types of the components, the modules and the specific components, the connection modes of the components and the expected technical effects brought by the technical characteristics are clear, complete and realizable, and the conventional use method and the expected technical effects brought by the technical characteristics are all disclosed in patents, journal papers, technical manuals, technical dictionaries and textbooks which can be acquired by a person in the field before the application date, or the prior art such as conventional technology, common knowledge in the field, and the like, so that the provided technical scheme is clear, complete and the corresponding entity products can be reproduced or obtained according to the technical means.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (7)

1. A high-voltage distribution comprehensive protection device is characterized in that: the anti-explosion device comprises an anti-explosion shell, wherein a display is arranged on the front surface of the anti-explosion shell, a circuit breaker and a protector are arranged in the anti-explosion shell, the protector comprises a main control board, a 32-bit MCU, a high-speed memory, a communication interface and a communication module are integrated on the main control board, the MCU is respectively connected with the high-speed memory, the communication interface and the display through leads, and the MCU is also respectively connected with a current transformer arranged on a two-phase bus and a voltage transformer for measuring three-phase voltage through an AD conversion module;

the bus is led out from a mining cable, an isolation mechanism and a circuit breaker are arranged on the bus, a three-phase bus at the output end of the isolation mechanism is respectively connected with a high-voltage fuse and then is connected with the primary side of a voltage transformer, three-phase lines at the secondary side of the voltage transformer are respectively connected with a low-voltage fuse and then are connected with a main control board, and a leakage test button is connected in parallel with a line, which is positioned behind the low-voltage fuse, on a C-phase line at the secondary side of the voltage transformer;

the switching-off and switching-on ports on the IO interface on the main control board are respectively connected with the switching-off button and the switching-on button through wires and then are connected with a switching-on and switching-off circuit in the circuit breaker, wherein the circuit of the switching-on button is also connected with a far/near switching button in series, and one ends of the switching-off button and the switching-on button are respectively connected with the latching ports on the IO interface on the main control board;

the IO interface on the main control board is also provided with wind power input, gas input, a switch state, a circuit breaker trolley entering in place, a trolley retreating in place, a trolley advancing, remote control starting, remote control stopping, descending, determining and resetting ports which are respectively connected with wind power, a gas detection sensor, a circuit breaker chassis truck, a remote control starting button, a remote control stopping button, a shifting button, a determining button and a resetting button under a coal mine through wires.

2. The high voltage distribution comprehensive protection device according to claim 1, wherein: and an insulation resistance test port and a power supply port are also arranged on the IO interface on the main control board, wherein the insulation resistance test port is connected with an insulation resistance monitoring device through a wire.

3. The high voltage distribution comprehensive protection device according to claim 1, wherein: and the input and the output of the IO interface on the main control board are electrically isolated.

4. The high voltage distribution comprehensive protection device according to claim 1, wherein: the communication module comprises a wired communication module and a wireless communication module, and the main control board is in bidirectional communication with the wireless remote controller through the wireless communication module.

5. The high voltage distribution comprehensive protection device according to claim 1, wherein: the display is provided with a display screen, a shift button, a determination button, a reset button and a breaker charging indicator lamp.

6. The high voltage distribution comprehensive protection device according to claim 1, wherein: the communication interface comprises an external communication interface, a 485 communication interface and an anti-override optical fiber interface, wherein the 485 communication interface is connected with the upper computer through a wire.

7. The high voltage distribution comprehensive protection device according to claim 1, wherein: and the protector is communicated with a ground monitoring center through an RS485 or CAN bus communication interface.

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