Medium-voltage air-pressurized cabinet control panel dynamically displaying working state of bus and control method thereof

Abstract

The application relates to a medium-voltage air-charge cabinet control panel and a control method for dynamically displaying the working state of a bus, wherein the control panel is provided with an LED lamp strip for displaying the working state of the bus; the LED lamp strip for displaying the working state of the bus comprises three lamp strip bands; the three lamp strips are respectively displayed as yellow, green and red; three sensors are arranged in the control cabinet for each phase of the bus; the sensors for each phase comprise an upper inlet bushing sensor, a vacuum switch tube lower port sensor and a lower outlet wire bus bushing end sensor; secondary voltage signals are sensed by the sensors, are led out from the cabinet body through an aviation plug, and three sensors are arranged for each phase; the sensors are connected with the lamp strips; each sensor controls a section of the lamp strip. The medium-voltage air-charge cabinet control panel and the control method can faster find problems, more accurately display fault positions, timely eliminate faults, are safe and reliable, and guarantee safe operation of equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to a switch cabinet panel, in particular to a medium-voltage gas-insulated switchgear control panel dynamically displaying busbar working state. BACKGROUND

[0002] When the medium-voltage gas-insulated switchgear is running, because there is a high voltage inside, once a fault occurs, the switch cabinet will be automatically tripped, which will affect power supply, and in severe cases, the switch cabinet will explode and burn, causing casualties.

[0003] In the prior art, conventional medium-voltage switch cabinets are more advanced generation by generation, various protections make the circuit run more safely, and now there are remote and intelligent controls to find faults and immediately stop operation for maintenance, but the display on the panel has always used traditional panels, and the workers cannot intuitively perceive whether the cabinet body is safe or not, and the live condition is unknown, and many power supply companies still adopt the traditional voting system, and many electricians mistakenly enter the live operating room, resulting in major safety accidents.

[0004] According to the national grid standardization, the analog bus of the panel uses a certain color, line type and width. As an electrician, the on-site monitoring of the gas-insulated switchgear is only to determine whether the cabinet body is running by the live display on the cabinet body, and at present, there are many live indication manufacturers in China, the quality is not strictly controlled, the voltage indication is not sensitive, and there are still a large number of safety hazards in safety. SUMMARY

[0005] In view of the deficiencies in the prior art, the present application provides a medium-voltage gas-insulated switchgear control panel dynamically displaying busbar working state, which can display the circuit condition in the switch cabinet in real time, improve the intuitiveness of the display panel, and timely find safety hazards.

[0006] The technical scheme adopted by the present application is as follows:

[0007] The medium-voltage gas-insulated switchgear control panel dynamically displaying busbar working state comprises a control panel, and a plurality of LED light strips arranged on the control panel and used for displaying the working state of the busbar.

[0008] The LED light strips displaying the working state of the busbar comprise three light strip bands.

[0009] Each light strip band represents one phase, and the light strip uses a 3mm wide light strip.

[0010] The three light strip bands are displayed as yellow, green and red respectively.

[0011] The three light strip bands are arranged in the order of yellow, green and red from top to bottom and left to right.

[0012] The light strips are arranged according to the positions of the busbars in the control cabinet, and the control panel is provided with circular LED lights with a diameter of 30mm at the closing and opening holes of the busbars.

[0013] Green light is the passage state, A, B, C three-phase.

[0014] The control cabinet is provided with three sensors for each phase of the bus; the sensors for each phase include an upper incoming bushing sensor, a vacuum switch tube lower port sensor, and a lower outgoing line bus bushing end sensor; the sensors sense secondary voltage signals, which are transmitted out of the cabinet body by aviation plugs; each phase is provided with three sensors; the sensors are connected to the light bar; each sensor controls a section of the light bar.

[0015] Temperature sensors are arranged at the incoming end copper bus, isolation static knife, and outgoing end copper bus of each phase in the switch cabinet; the temperature on the copper bus is transmitted out by secondary wires through aviation plugs, and finally displayed on the panel, realizing real-time display of the temperature in the cabinet.

[0016] The upper incoming line bushing sensor reflects the live condition of the bus above the vacuum switch tube, including the live condition of the main bus;

[0017] The sensor from the lower port of the vacuum switch tube to the upper port of the disconnector reflects whether the vacuum switch tube is closed; if it is closed, the upper port of the disconnector is live; if the disconnector is also closed, the sensor of the lower outgoing line bushing is also live, and the entire cabinet is live;

[0018] The upper and lower incoming and outgoing line bushings are provided with sensors, which can be led out by secondary wires;

[0019] The lower port of the vacuum switch tube is provided with a ring-shaped sensor, which is sleeved on the vacuum tube; the voltage signal is led out by the box body front plate through aviation plugs.

[0020] Temperature sensors are attached to the incoming end, outgoing end, and isolation static knife of each phase of copper bus; the temperature values are transmitted through aviation plugs and then connected to the LED light bar on the panel.

[0021] A control method for a medium-voltage gas-filled cabinet control panel dynamically displaying the working state of the bus,

[0022] The LED light bar is provided with four brightness levels: 1 for power off, 2 for low voltage (low voltage range), 3 for normal voltage (normal voltage range), and 4 for overvoltage (overvoltage range), and the switch operating state line.

[0023] The sensor of a certain phase in the control cabinet is not live; the LED light bar at the corresponding position on the panel appears to be power off; when the LED light bar is extinguished;

[0024] The voltage of a certain phase in the control cabinet is low or high, and the voltage signal of the sensor at that position also changes accordingly; the LED light bar changes in brightness according to the change in voltage, and also displays the running state of the gas-filled cabinet according to the brightness level;

[0025] The panel of LED is provided with display temperature, and displays the temperature of the bus and switch in the gas-filled cabinet. The gas-filled cabinet is prevented from running at too high temperature.

[0026] The control cabinet shell is provided with a live induction device for displaying whether the voltage of the control cabinet is safe and whether it is at the same potential with the ground. The device displays whether the cabinet shell and panel are well grounded, whether there is leakage, whether the potential is safe, and whether it can be approached for monitoring or maintenance.

[0027] The live induction device is isolated from the switch cabinet and is connected to the ground by a separate wire. The electromagnetic induction is used to induce whether the panel and shell are live.

[0028] The beneficial effects of the present application relative to the prior art are as follows:

[0029] The medium-voltage gas-filled cabinet control panel dynamically displays the working state of the bus, is intuitive, uses photoelectric technology, prompts the monitoring staff to find problems faster, makes good timely protection, and can more accurately understand which part has a problem.

[0030] The medium-voltage gas-filled cabinet control panel dynamically displays the working state of the bus, and can prompt the running state of the switch cabinet, such as whether it is grounded after being isolated, which can be clearly displayed.

[0031] The medium-voltage gas-filled cabinet control panel dynamically displays the working state of the bus, and can clearly display whether a switch is closed in place during a power-on test. If a certain switch is not closed in place, it is displayed as abnormal. If a certain point has poor contact, although it is displayed as normal, the temperature of the point will definitely be abnormal, and the temperature will have a corresponding prompt.

[0032] The medium-voltage gas-filled cabinet control panel dynamically displays the working state of the bus, and the LED lamp display technology is applied to the medium-voltage gas-filled cabinet panel. The voltage and temperature conditions in the medium-voltage gas-filled cabinet are displayed in real time. When a fault occurs in the medium-voltage gas-filled cabinet, it can be prompted and alarmed. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structure diagram of a bus sensor position of the medium-voltage gas-filled cabinet control panel dynamically displaying the working state of the bus;

[0034] Figure 2 is a structure diagram of the medium-voltage gas-filled cabinet control panel dynamically displaying the working state of the bus;

[0035] Figure 3 is Figure 2 an A enlarged structure diagram of;

[0036] Figure 4 is Figure 2 a B enlarged structure diagram of;

[0037] Figure 5 is Figure 2 C amplification structure schematic diagram.

[0038] Explanation of main component symbols in the drawings:

[0039] In the drawings:

[0040] 1. Upper inlet bushing sensor installation position (output voltage signal)

[0041] 2. Vacuum switch tube lower port sensor installation position (output voltage signal)

[0042] 3. Lower outlet bushing sensor installation position (output voltage signal)

[0043] 4. Ambient temperature monitoring sensor installation position

[0044] 5. Inlet end copper busbar temperature sensor installation position (temperature monitoring)

[0045] 6. Isolation static knife temperature sensor installation position (temperature monitoring)

[0046] 7. Aviation plug (vacuum switch tube sensor secondary line outlet)

[0047] 8. Outlet end copper busbar temperature sensor installation position (temperature monitoring)

[0048] 12. Fault indicator

[0049] 13. (Switch cabinet) gas chamber internal ring temperature display

[0050] 14. Inlet end LED light bar

[0051] 141. Inlet end LED light bar (A phase temperature)

[0052] 142. Inlet end LED light bar (B phase temperature)

[0053] 143. Inlet end LED light bar (C phase temperature)

[0054] 15. Inlet end busbar temperature indication

[0055] 16. Circuit breaker switch indication

[0056] 17. Barometer indication

[0057] 18. Circuit breaker opening and closing button

[0058] 19. Panel explanation

[0059] 210. Manual energy storage hole

[0060] 211. Energy storage indicator light

[0061] 212, Isolated static contact temperature indication

[0062] 213, Vacuum interrupter lower port LED light bar

[0063] 2131, Vacuum interrupter lower port LED light bar (A phase temperature)

[0064] 2132, Vacuum interrupter lower port LED light bar (B phase temperature)

[0065] 2133, Vacuum interrupter lower port LED light bar (C phase temperature)

[0066] 214, Isolating switch closing and opening operation hole

[0067] 215, Isolating switch indicator

[0068] 216, Outlet end LED light bar

[0069] 2161, Outlet end LED light bar (A phase temperature)

[0070] 2162, Outlet end LED light bar (B phase temperature)

[0071] 2163, Outlet end LED light bar (C phase temperature)

[0072] 217, Outlet end busbar temperature indication

[0073] 218, Grounding switch indicator

[0074] 219, Panel and cabinet shell potential indicator

[0075] 220, Grounding switch operation hole

[0076] 221, Electromagnetic lock

[0077] 222, Grounding observation window DETAILED DESCRIPTION

[0078] The application will be described in detail below with reference to the accompanying drawings and examples:

[0079] ATTACHMENT Figures 1-5 It can be known that a medium-voltage gas-filled cabinet control panel dynamically displays the working state of the busbar, and the control panel is provided with an LED light bar for displaying the working state of the busbar.

[0080] The LED light bar for displaying the working state of the busbar comprises three light bar strips.

[0081] Each light bar strip represents a phase, and the light bar uses a 3mm wide light bar.

[0082] The three light bar strips are displayed as yellow, green and red respectively.

[0083] Three light bars are arranged in the order of yellow, green and red from top, middle and bottom and left, middle and right respectively.

[0084] The light bars are set according to the positions of the bus bars in the control cabinet; the control panel is provided with a 30mm circular LED lamp at the closing and opening holes of the bus bars in the control cabinet.

[0085] The green light is on when the path is in the state, and there are A, B and C three phases.

[0086] Each phase of the bus bar in the control cabinet is provided with three sensors; each phase of the sensor includes an upper incoming bushing sensor, a vacuum switch tube lower port sensor and a lower outgoing line bus bushing end sensor; the sensor senses a secondary voltage signal, which is connected to the cabinet through an aviation plug; each phase is provided with three sensors; the sensor is connected with the light bar; each sensor controls a section of the light bar.

[0087] The incoming end copper bus bar, the isolation static knife and the outgoing end copper bus bar of each phase in the switch cabinet are respectively provided with temperature sensors, the temperature on the copper bus bar is connected to the panel through the aviation plug by the secondary line, and the temperature in the cabinet is displayed in real time.

[0088] The upper incoming bushing sensor reflects the electrified condition of the bus bar above the vacuum switch tube, including the electrified condition of the main bus bar;

[0089] The sensor from the lower port of the vacuum switch tube to the upper port of the disconnector reflects whether the vacuum switch tube is closed; if it is closed, the upper port of the disconnector is electrified; if the disconnector is also closed, the sensor of the lower outgoing bushing is also electrified, and the whole cabinet is electrified;

[0090] The upper and lower incoming and outgoing bushings are provided with sensors, which can be led out by the secondary line;

[0091] The lower port of the vacuum switch tube is provided with a ring-shaped sensor, which is sleeved on the vacuum tube, and the voltage signal is led out by the aviation plug through the front panel of the box.

[0092] The incoming end, outgoing end and isolation static knife of each phase of copper bus bar are provided with temperature sensors, which transmit the temperature value through the aviation plug and are connected to the LED light bar of the panel.

[0093] The control method of the control panel of the medium voltage gas-filled cabinet for dynamically displaying the working state of the bus bar,

[0094] The LED light bar is provided with four brightness levels, 1 for power off, 2 for low voltage (low voltage range), 3 for normal voltage (normal voltage range) and 4 for overvoltage (overvoltage range), and the switch operating state line.

[0095] The sensor of a certain phase in the control cabinet is not electrified; the LED light bar at the corresponding position on the panel appears power off, and the LED light bar is extinguished;

[0096] If the voltage of a certain phase in the control cabinet is too low or too high, the voltage signal of the sensor at the place will change accordingly, and the brightness of the LED light bar will change according to the change of the voltage, and the running state of the gas-filled cabinet is displayed according to the brightness level.

[0097] The temperature of the bus and the switch in the gas-filled cabinet is displayed on the panel of the LED, so that the running temperature of the gas-filled cabinet is prevented from being too high.

[0098] The live induction device is arranged on the shell of the control cabinet, and is used for displaying whether the voltage of the control cabinet is safe and whether the voltage is the same as the ground potential; whether the cabinet shell and the panel are well grounded, whether there is leakage, whether the potential is safe, and whether the monitoring or maintenance can be approached.

[0099] The live induction device is isolated from the switch cabinet, and is separately connected to the ground, and the electromagnetic induction is used to induct whether the panel and the shell are live.

[0100] The medium-voltage gas-filled cabinet control panel of the application can dynamically display the working state of the bus, and can intuitively display, use photoelectric technology, prompt the monitoring staff to find problems faster, make timely protection, and more accurately know which part is problematic.

[0101] The medium-voltage gas-filled cabinet control panel of the application can prompt the running state of the switch cabinet, whether the ground is connected after isolation, and can clearly display.

[0102] The medium-voltage gas-filled cabinet control panel of the application can clearly display whether a switch is closed in place during the power-on test, and if a certain switch is not closed in place, the display is abnormal, and if a certain point is not in good contact, although the display is normal, the temperature of the point will be abnormal, and the temperature will have a corresponding prompt.

[0103] The medium-voltage gas-filled cabinet control panel of the application can dynamically display the working state of the bus, and the LED light display technology is applied to the panel of the medium-voltage gas-filled cabinet; the voltage condition and the temperature condition in the medium-voltage gas-filled cabinet are displayed in real time; when a fault occurs in the medium-voltage gas-filled cabinet, the fault can be prompted and alarmed.

[0104] The application firstly sets the inductive sensor (similar to a voltage transformer) on the upper bushing of the A, B and C three-phase bus in the gas-filled cabinet, the lower opening of the vacuum switch tube and the lower outgoing line bus bushing end, and sets the adhesive temperature sensor on the incoming copper bus, the isolation static knife and the outgoing copper bus, so as to induct the voltage signal and the temperature signal, and transmit the signals from the aviation plug, and the signal line is divided into two groups, one group is transmitted to the comprehensive protector to realize local and remote control, and the other group of signal lines is connected to the LED lamp group on the panel, and the functions can be realized as follows:

[0105] 1. Three-phase A, B, C respectively display the charged condition, such as the cabinet operation, the disconnector and the circuit breaker are in the closed state, then the LED light bar of A, B, C is normally displayed with the normal brightness and the circuit breaker indicator and the disconnector indicator are green, the grounding switch light is red, the grounding is broken, the panel voltage sensing light is normally bright, then the switch cabinet has no fault;

[0106] 2. If the circuit breaker is opened, the LED light bar of the lower outlet of the vacuum switch tube and the LED light bar of the outlet end do not display brightness, the circuit breaker indicator is red, the grounding light is normally bright and the panel voltage sensing light is normally displayed, indicating that the circuit breaker is considered to be disconnected;

[0107] 3. If the circuit breaker is closed and the isolation is opened, the LED light bar of the lower outlet of the vacuum switch tube and the LED light bar of the inlet end display normal brightness, the circuit breaker indicator is green, the disconnector indicator is red, the grounding light is normally bright and the panel voltage sensing light is normally displayed, indicating that the disconnector is artificially disconnected;

[0108] 4. If the LED light bar of the lower outlet of the vacuum switch tube and the above LED light display normally, the isolation indicator is red, the grounding switch is green, and the panel voltage sensing light is normally displayed, then the grounding loop is complete, this state is the normal power-off state, the cable door can be opened;

[0109] 5. If the entire cabinet is not charged, all LED light bars do not display, and the voltage sensing light is normal, then this series of cabinets are not charged, which can be understood as the power-off of the upper level switch.

[0110] 6. In the fault state, if three-phase overload, then A, B, C three LED lights are high-brightness displayed, if under-voltage, then low-brightness displayed, if there is a ground fault under a certain phase, then a certain phase displays high-brightness or low-brightness.

[0111] 7. If the temperature of a certain point in the cabinet is too high, the display on the screen can display the temperature value at any time to remind the observer of the change of the temperature in the cabinet.

[0112] Circuit breaker unit operation instructions

[0113] I. Power transmission operation procedure:

[0114] 1. Confirm that the cable door is installed;

[0115] 2. Insert the operating handle into the grounding switch operating hole and rotate it counterclockwise to open the grounding switch;

[0116] 3. Insert the operating handle into the disconnector operating hole and rotate it clockwise to close the disconnector.

[0117] 4. Insert the operating handle into the energy storage operating hole and rotate it clockwise until the energy storage is in place, and the energy storage indicator displays "energy stored";

[0118] 5. Rotate the circuit breaker switch closing button in the counterclockwise direction, and the circuit breaker is closed.

[0119] II. Power-off operation procedure:

[0120] 1. Rotate the circuit breaker switch opening button in the counterclockwise direction, and the circuit breaker is opened.

[0121] 2. Insert the operating handle into the disconnector operating hole and rotate it in the counterclockwise direction to open the disconnector.

[0122] 3. Insert the operating handle into the grounding switch operating hole and rotate it in the clockwise direction to close the grounding switch.

[0123] After confirming the power-off, loosen the bolts on the cabinet door with a wrench, open the door, and perform maintenance.

[0124] The electromagnetic lock has power supply, and the cable side has no power. Press the

[0125] The electromagnetic lock red button can close the grounding switch.

[0126] The electromagnetic lock has power supply, and the cable side has power. Press the

[0127] The electromagnetic lock cannot be unlocked, and the grounding switch cannot be closed.

[0128] The electromagnetic lock key can only be used as an emergency unlocking

[0129] key, and it is strictly prohibited to use it in the normal state.

[0130] The above is only the preferred embodiment of the present application, and does not limit the structure of the present application in any form. Any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the present application are within the scope of the technical solution of the present application.

Claims

1. A control panel for a medium-voltage gas-insulated switchgear that dynamically displays the working status of the busbar, characterized in that, The control panel is equipped with LED light strips to display the working status of the busbar; Each phase of the busbar inside the control cabinet is equipped with three sensors; the sensors for each phase include the upper inlet bushing sensor, the lower outlet sensor of the vacuum switch tube, and the lower outlet busbar bushing end sensor; the sensors sense the secondary voltage signal, which is passed out of the cabinet through the aviation connector, and each phase has three sensors; the sensors are connected to the light strips; each sensor controls a section of the light strip. Temperature sensors are installed on the copper busbars at the incoming end, the isolation stationary knife, and the copper busbars at the outgoing end of each phase in the switch cabinet. The temperature on the copper busbars is transmitted through secondary wires and aviation connectors, and finally displayed on the panel to achieve real-time display of the temperature inside the cabinet. The upper inlet bushing sensor reflects the energization status of the busbar above the vacuum switch tube, including the energization status of the main busbar. The sensor from the bottom of the vacuum switch tube to the top of the disconnect switch indicates whether the vacuum switch tube is closed. If it is closed, the top of the disconnect switch is energized. If the disconnect switch is also closed, the sensor on the bottom bushing is also energized, and the entire cabinet is energized. Sensors are installed in the upper and lower inlet and outlet bushings, and can be led out through secondary lines; A ring sensor is mounted on the vacuum tube at the bottom of the vacuum switch tube, and the voltage signal is led out from the front panel of the enclosure via a secondary wire and an aviation connector.

2. The medium-voltage gas-insulated switchgear control panel for dynamically displaying the working status of the busbar according to claim 1, characterized in that: The LED light strip that displays the working status of the busbar includes three light strips.

3. The medium-voltage gas-insulated switchgear control panel for dynamically displaying the working status of the busbar according to claim 1, characterized in that: Each light strip represents one phase, and the light strips used are 3mm wide.

4. The medium-voltage gas-insulated switchgear control panel for dynamically displaying the working status of the busbar according to claim 1, characterized in that: The three light strips display yellow, green, and red colors respectively.

5. The medium-voltage gas-insulated switchgear control panel for dynamically displaying the working status of the busbar according to claim 1, characterized in that: The three light strips are arranged in the order of yellow, green, and red, from top, middle, and bottom, and from left, middle, and right, respectively.

6. The medium-voltage gas-insulated switchgear control panel for dynamically displaying the working status of the busbar according to claim 1, characterized in that: The light strips are installed according to the positions of the busbars inside the control cabinet; the control panel has 30mm round LED lights installed at the opening and closing holes of the busbars in the control cabinet. When the green light is on, the circuit is open, consisting of three phases: A, B, and C.

7. The medium-voltage gas-insulated switchgear control panel for dynamically displaying the working status of the busbar according to claim 1, characterized in that: Temperature sensors are attached to the inlet, outlet, and isolation blades of each phase copper busbar. The temperature values ​​are transmitted through aviation connectors and then connected to the LED light strip on the panel.

8. The control method for the control panel of the medium-voltage gas-insulated switchgear that dynamically displays the working status of the busbar according to any one of claims 1 to 7, characterized in that: A certain phase sensor in the control cabinet will be de-energized; the corresponding LED strip on the panel will lose power and turn off. If the voltage of a certain phase in the control cabinet is low or high, the voltage signal of the sensor at that location will also change accordingly. The brightness of the LED light strip will change according to the voltage change, and it will also display the operating status of the gas filling cabinet according to the brightness level. The LED panel is equipped with a temperature display, showing the temperature of the busbars and switches inside the gas-filled cabinet; The control cabinet is equipped with a live induction device to display whether the control cabinet voltage is safe and whether it is at the same potential as the ground. The live induction device is isolated from the switch cabinet and has a separate lead connected to the ground. It uses electromagnetic induction to detect whether the panel and casing are live.

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