CN216051923U - Medium-voltage cabinet comprehensive measurement and control display device and medium-voltage cabinet - Google Patents
Medium-voltage cabinet comprehensive measurement and control display device and medium-voltage cabinet Download PDFInfo
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- CN216051923U CN216051923U CN202122239370.9U CN202122239370U CN216051923U CN 216051923 U CN216051923 U CN 216051923U CN 202122239370 U CN202122239370 U CN 202122239370U CN 216051923 U CN216051923 U CN 216051923U
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Abstract
The application discloses medium voltage cabinet synthesizes and observes and controls display device and medium voltage cabinet includes: the control input circuit is configured to set a zero sequence voltage alarm value of the medium voltage cabinet; and the zero sequence voltage alarm and reset circuit is electrically connected with the MCU system circuit, is configured to alarm when the zero sequence voltage of the medium voltage cabinet exceeds the zero sequence voltage alarm value, and stops alarming after reset operation. According to the technical scheme provided by the embodiment of the application, the zero sequence voltage alarm and reset circuit is integrated on the measurement and control display device, the zero sequence voltage value is visualized, the zero sequence voltage alarm value is set according to the actual condition of a project, the sensitivity of insulation failure alarm is ensured, various alarm modes can be set through the alarm circuit, operation and maintenance personnel can quickly respond according to alarm information, and the device has better popularization significance and practical application effect in a medium-voltage power distribution system.
Description
Technical Field
The utility model relates to the field of distribution high-voltage equipment, in particular to a medium-voltage cabinet comprehensive measurement and control display device and a medium-voltage cabinet.
Background
In a medium-voltage power distribution system with nominal voltage of 1 kV-35 kV, a large number of indoor armored movable type centrally installed cabinets generally comprise a power supply incoming cabinet, a ring network incoming and outgoing cabinet, a bus PT (Potential Transformer) cabinet and a Transformer feeder cabinet, wherein the centrally installed cabinets are mature in type, and a three-phase PT is installed in the bus PT cabinet and is used for providing bus voltage monitoring, an auxiliary loop power supply, main loop zero sequence voltage and the like for a power distribution secondary system.
The zero sequence voltage value of the main circuit is obtained by the phasor sum of the A phase voltage Ua, the B phase voltage Ub and the C phase voltage Uc which are connected by the three-phase PT secondary winding according to an open delta. When the three-phase voltage is completely symmetrical, the zero-sequence voltage is 0, when the insulation failure of the power distribution system causes single-phase or two-phase grounding fault, the zero-sequence voltage is generated, and the magnitude depends on the grounding degree, so the measured zero-sequence voltage can be used as a means for judging the insulation failure.
The existing technical scheme is that a voltage relay is selected, an empirical starting voltage of 30V is set, when insulation failure occurs, an auxiliary contact of the voltage relay acts, a protection device is not generally arranged on a PT cabinet, so that a remote signaling contact of a cabinet protection device is required to be connected through hard wiring, then the signal is communicated to a background, and signals of a handcart test position, a handcart working position, an alternating current and direct current micro-break alarm, a heater broken wire alarm and the like of the PT cabinet are required to be connected through hard wiring to the cabinet protection device.
Another kind of technical scheme is bus protection device, can accomplish insulating warning and alarm value setting, but the atmospheric control of generating line PT cabinet, handcart position demonstration, chassis car electric control function is realized alone by different components and parts respectively, installs on instrument room panel.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defects or shortcomings in the prior art, it is desirable to provide a medium voltage cabinet integrated measurement and control display device and a medium voltage cabinet.
In a first aspect, a comprehensive measurement and control display device for a medium voltage cabinet is provided, which comprises:
the control input circuit is configured to set a zero sequence voltage alarm value of the medium voltage cabinet;
and the zero sequence voltage alarm and reset circuit is electrically connected with the MCU system circuit, is configured to alarm when the zero sequence voltage of the medium voltage cabinet exceeds the zero sequence voltage alarm value, and stops alarming after reset operation.
The device comprises an audible and visual alarm device and a reset button, wherein the audible and visual alarm device and the reset button are both electrically connected with the zero sequence voltage alarm and reset circuit,
the acousto-optic alarm device is configured to perform acousto-optic alarm when the zero sequence voltage alarm and reset circuit alarms, and stop acousto-optic alarm after reset;
the reset button is configured to reset the zero sequence voltage alarm and reset circuit after being pressed.
The system comprises a voltage measuring circuit, wherein the voltage measuring circuit is electrically connected with the MCU system circuit and is configured to measure three-phase voltage and zero-sequence voltage values of the medium-voltage cabinet.
The device comprises a temperature and humidity control circuit, a temperature and humidity sensor and a heater,
the temperature and humidity sensor is electrically connected with the temperature and humidity control circuit, is configured to detect the temperature and the humidity of the medium-voltage cabinet and transmit the detected temperature and the detected humidity to the temperature and humidity control circuit,
the temperature and humidity control circuit is electrically connected with the MCU system circuit and the heater and is configured to control the start and stop of the heater according to the received temperature and humidity.
The device comprises a display circuit which is electrically connected with the MCU system circuit, the voltage measuring circuit and the temperature and humidity control circuit,
is configured to receive and display the three-phase voltage, the zero-sequence voltage value and the detected temperature and humidity of the medium voltage cabinet.
The system may include an electric chassis control circuit electrically connected to the MCU system circuit, and configured to control a moving direction and a moving position of the electric chassis, where the moving position includes at least a storage position of the electric chassis, a test position of the electric chassis, and a working position of the electric chassis.
The MCU system circuit is electrically connected with the MCU system circuit and is configured to be in communication connection with the outside.
In an implementation, the communication circuit includes at least a serial communication circuit and an ethernet communication circuit.
The integrated measurement and control display device comprises a power supply and is used for supplying power to the integrated measurement and control display device of the medium voltage cabinet.
In a second aspect, a medium voltage cabinet is provided, which comprises the above integrated measurement and control display device.
According to the technical scheme provided by the embodiment of the application, the zero sequence voltage alarm and reset circuit is integrated on the measurement and control display device, the zero sequence voltage value is visualized, the zero sequence voltage alarm value is set according to the actual condition of a project, the sensitivity of insulation failure alarm is ensured, various alarm modes can be set through the alarm circuit, operation and maintenance personnel can quickly respond according to alarm information, and the device has better popularization significance and practical application effect in a medium-voltage power distribution system.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural view of a comprehensive measurement and control display device of a medium voltage cabinet in this embodiment.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, the present embodiment provides a comprehensive measurement and control display device for a medium voltage cabinet, including:
the system comprises an MCU system circuit 10 and a control input circuit 20 connected with the MCU system circuit 10, wherein the control input circuit 20 is configured to set a zero sequence voltage alarm value of the medium voltage cabinet;
and a zero sequence voltage alarm and reset circuit 30 electrically connected to the MCU system circuit 10, configured to alarm when the zero sequence voltage of the medium voltage cabinet exceeds the zero sequence voltage alarm value, and stop alarming after a reset operation.
According to the technical scheme provided by the embodiment of the application, the zero sequence voltage alarm and reset circuit 30 is integrated on the measurement and control display device, the zero sequence voltage value is visualized, the zero sequence voltage alarm value is set according to the actual condition of a project, the sensitivity of insulation failure alarm is ensured, various alarm modes can be set through the alarm circuit, operation and maintenance personnel can quickly respond according to alarm information, and the device has better popularization significance and practical application effect in a medium-voltage power distribution system.
As an implementation manner, the zero sequence voltage alarm and reset circuit comprises an audible and visual alarm device and a reset button, wherein the audible and visual alarm device and the reset button are both electrically connected with the zero sequence voltage alarm and reset circuit 30,
the sound-light alarm device is configured to perform sound-light alarm when the zero sequence voltage alarm and reset circuit 30 alarms, and stop sound-light alarm after reset;
the reset button is configured to reset the zero sequence voltage alarm and reset circuit 30 upon being pressed.
The embodiment is also provided with an audible and visual alarm device and a reset button, both of which are arranged on the device and are electrically connected with the zero sequence voltage alarm and reset circuit 30, the zero sequence voltage alarm and reset circuit 30 alarms when the detected zero sequence voltage value exceeds the zero sequence voltage alarm value, and the alarm can be given in various modes, for example, the MCU system circuit 10 alarms a remote monitoring worker so that the monitoring worker can know the condition in time; or the acousto-optic alarm device can carry out acousto-optic alarm on site, so that on-site personnel can know the situation in time, and the acousto-optic alarm device stops alarming after resetting;
meanwhile, a reset button is additionally arranged on the measurement and control display device, so that field workers can reset the zero sequence voltage directly through the reset button, or remote reset operation can be carried out through the MCU system circuit 10, remote control workers send reset signals to the MCU system circuit 10, and the MCU system circuit 10 controls the zero sequence voltage alarm and reset circuit 30 to reset.
As an implementation manner, a voltage measurement circuit 40 is included, which is electrically connected to the MCU system circuit 10 and configured to measure three-phase voltage and zero-sequence voltage values of the medium voltage cabinet.
In this embodiment, a voltage measurement circuit 40 is provided, through which three-phase voltages and zero-sequence voltages of the medium voltage cabinet are measured, and the working condition of the medium voltage cabinet is determined according to the measured voltages.
As an implementation, a temperature and humidity control circuit 60, a temperature and humidity sensor 70 and a heater 80 are included,
the temperature and humidity sensor 70 is electrically connected to the temperature and humidity control circuit 60, is configured to detect the temperature and humidity of the medium voltage cabinet and transmit the detected temperature and detected humidity to the temperature and humidity control circuit 60,
the temperature/humidity control circuit 60 is electrically connected to the MCU system circuit 10 and the heater 80, and is configured to control the start and stop of the heater 80 according to the received temperature/humidity.
In this embodiment, a temperature and humidity sensor 70 is further added, the temperature and humidity of the intermediate-voltage cabinet are detected in real time by the temperature and humidity sensor 70, the temperature and humidity sensor 70 is electrically connected to the temperature and humidity control circuit 60, and when the temperature and humidity of the space where the temperature and humidity sensor 70 is located exceeds a limit value, the temperature and humidity control circuit 60 controls the corresponding heater 80 to perform heating operation, so that the space where the temperature and humidity sensor is located recovers the range below the limit value; meanwhile, other components with changed temperature and humidity can be added, such as an air exhaust fan, a moisture absorption and dehumidification device and the like; the temperature and humidity control circuit 60 is electrically connected with the MCU system circuit 10, the temperature and humidity control circuit 60 is controlled through the MCU system circuit 10, for example, the temperature and humidity limit values are set, meanwhile, the temperature and humidity condition of the medium voltage cabinet can be transmitted through the MCU system circuit 10, and a worker can monitor the condition of the medium voltage cabinet remotely.
Further comprises a display circuit 50 electrically connected with the MCU system circuit 10, the voltage measuring circuit 40 and the temperature and humidity control circuit 60,
is configured to receive and display the three-phase voltage, the zero-sequence voltage value and the detected temperature and humidity of the medium voltage cabinet.
The measurement and control display device of this embodiment is further provided with a display circuit 50, the display circuit 50 is electrically connected to the MCU system circuit 10, and receives and displays corresponding data detected or received by the voltage measurement circuit 40 and the temperature and humidity control circuit 60, for example, three-phase voltage data, temperature and humidity data, etc., and the data is displayed by the display circuit 50, which is convenient for a worker to view and record.
Further, the electric chassis control circuit 90 is electrically connected to the MCU system circuit 10, and is configured to control a moving direction and a moving position of the electric chassis, where the moving position at least includes a storage position of the electric chassis, a test position of the electric chassis, and a working position of the electric chassis.
Generally do not set up electronic chassis car in middling pressure cabinet handcart bottom, generally adopt hand mode to shake in and shake out the bottom of middling pressure cabinet with the chassis car, it is comparatively inconvenient when staff operate this chassis car, and the cost manpower, set up electronic chassis car control circuit 90 in this embodiment, carry out electric control to electronic chassis car through this circuit, through the moving direction and the shift position of control electronic chassis car when needs are used or are accomodate, move it to the position of setting for work, the position of setting for this electronic chassis car is deposited, the position that is used for experimental or the position of work etc. can be confirmed according to actual conditions.
And can show the parameter or operation button relevant with electronic chassis through the display circuit 50 that is connected with MCU system circuit 10 electricity, display circuit 50 can show the position of electronic chassis, and operating position etc. and workman's operation is more convenient to the outward appearance is neater pleasing to the eye, does not need too much line connection.
Further, the MCU system circuit 10 includes a communication circuit 100 electrically connected to the MCU system circuit 10 and configured to be in communication with the outside.
As shown in fig. 1, the communication circuit 100 connected to the MCU system circuit 10 in this embodiment is used to communicate with the outside.
Further, the communication circuit 100 at least includes a serial communication circuit 100 and an ethernet communication circuit 100.
The serial port communication circuit 100 and the ethernet communication circuit 100 are preferably arranged in this embodiment, serial port communication and ethernet communication, such as serial port 485/232 communication and RJ45 ethernet communication, can be respectively realized, and a communication interface and a protocol can be selected and used according to the actual situation of a project.
Further, the integrated measurement and control display device further comprises a power supply 110 for supplying power to the integrated measurement and control display device of the medium voltage cabinet.
The power supply 110 is configured to supply power to the measurement and control display device, and the power supply 110 may be an external power supply 110.
The connection in this embodiment may refer to wired electrical connection between the circuits, or may refer to wireless connection between the circuits, such as bluetooth connection, which is selected according to actual situations.
The integrated measurement and control display device for the medium-voltage cabinet integrates functions of temperature and humidity control, zero sequence voltage alarm, voltage measurement, electric chassis vehicle control and the like, the functions are completed by the set of device, and the integrated measurement and control display device is different from the functions realized by different components and parts, so that the cost of a large number of wires and labor hours can be saved, a large amount of wiring cost in the cabinet and between the cabinets can be saved, the wiring becomes simple, the time consumed by wiring labor and the influence on the current-carrying capacity of the wires due to poor heat dissipation are reduced, the difficulty of fault line inspection is reduced, the panel arrangement of the device is neat and simple, and the operation is convenient; and above-mentioned each circuit all adopts the setting that integrates, can carry out the adaptation of different functions according to the project demand, can not cause the extravagant and idle condition of device module, but reduce cost.
Meanwhile, the remote signaling signal and the alarm signal in the device in the embodiment are diversified in output mode, different communication interfaces and protocols can be selected and used by workers according to the actual conditions of projects, and the power-assisted transformer substation is intelligent, digital and unmanned.
The embodiment also provides a medium voltage cabinet, which comprises the comprehensive measurement and control display device of the medium voltage cabinet.
The medium voltage cabinet in this embodiment can be in the same place humiture control, zero sequence voltage warning, voltage measurement, electronic chassis car control etc. function homogeneous integration, has saved space and wiring cost in the cabinet to the panel of medium voltage cabinet is unknown regular succinct, and it is more convenient to operate.
It will be understood that any orientation or positional relationship indicated above with respect to the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., is based on the orientation or positional relationship shown in the drawings and is for convenience in describing and simplifying the utility model, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be considered limiting of the utility model. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. The utility model provides a medium voltage cabinet synthesizes and observes and control display device which characterized in that includes:
the control input circuit is configured to set a zero sequence voltage alarm value of the medium voltage cabinet;
and the zero sequence voltage alarm and reset circuit is electrically connected with the MCU system circuit, is configured to alarm when the zero sequence voltage of the medium voltage cabinet exceeds the zero sequence voltage alarm value, and stops alarming after reset operation.
2. The integrated measurement, control and display device of the medium voltage cabinet as claimed in claim 1, comprising an audible and visual alarm device and a reset button, wherein the audible and visual alarm device and the reset button are both electrically connected with the zero sequence voltage alarm and reset circuit,
the acousto-optic alarm device is configured to perform acousto-optic alarm when the zero sequence voltage alarm and reset circuit alarms, and stop acousto-optic alarm after reset;
the reset button is configured to reset the zero sequence voltage alarm and reset circuit after being pressed.
3. The integrated measurement, control and display device of the medium voltage cabinet as claimed in claim 1, comprising a voltage measurement circuit electrically connected to the MCU system circuit and configured to measure three-phase voltage and zero-sequence voltage values of the medium voltage cabinet.
4. The integrated measurement and control display device of the medium voltage cabinet as claimed in claim 3, comprising a temperature and humidity control circuit, a temperature and humidity sensor and a heater,
the temperature and humidity sensor is electrically connected with the temperature and humidity control circuit, is configured to detect the temperature and the humidity of the medium-voltage cabinet and transmit the detected temperature and the detected humidity to the temperature and humidity control circuit,
the temperature and humidity control circuit is electrically connected with the MCU system circuit and the heater and is configured to control the start and stop of the heater according to the received temperature and humidity.
5. The integrated measurement and control display device of the medium voltage cabinet as claimed in claim 4, comprising a display circuit electrically connected to the MCU system circuit, the voltage measurement circuit and the temperature and humidity control circuit,
is configured to receive and display the three-phase voltage, the zero-sequence voltage value and the detected temperature and humidity of the medium voltage cabinet.
6. The integrated measurement, control and display device of the medium voltage cabinet according to claim 1, comprising an electric chassis control circuit electrically connected to the MCU system circuit and configured to control a moving direction and a moving position of the electric chassis, wherein the moving position at least comprises a storage position of the electric chassis, a testing position of the electric chassis, and a working position of the electric chassis.
7. The integrated measurement, control and display device of the medium voltage cabinet as claimed in claim 1, comprising a communication circuit electrically connected to the MCU system circuit and configured to be in communication connection with the outside.
8. The integrated measurement, control and display device of the medium voltage cabinet according to claim 7, wherein the communication circuit at least comprises a serial communication circuit and an Ethernet communication circuit.
9. The integrated measurement and control display device of the medium voltage cabinet as claimed in claim 1, further comprising a power supply for supplying power to the integrated measurement and control display device of the medium voltage cabinet.
10. A medium voltage cabinet, characterized in that, comprising the medium voltage cabinet integrated measurement and control display device of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122239370.9U CN216051923U (en) | 2021-09-15 | 2021-09-15 | Medium-voltage cabinet comprehensive measurement and control display device and medium-voltage cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122239370.9U CN216051923U (en) | 2021-09-15 | 2021-09-15 | Medium-voltage cabinet comprehensive measurement and control display device and medium-voltage cabinet |
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| Publication Number | Publication Date |
|---|---|
| CN216051923U true CN216051923U (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122239370.9U Active CN216051923U (en) | 2021-09-15 | 2021-09-15 | Medium-voltage cabinet comprehensive measurement and control display device and medium-voltage cabinet |
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| CN (1) | CN216051923U (en) |
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- 2021-09-15 CN CN202122239370.9U patent/CN216051923U/en active Active
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