One-key sequential control switch cabinet
The switchgear with one-click sequential control automates and interlocks the operation of the switchgear, solves the risk of misoperation in traditional manual operation, improves the safety and efficiency of the power system, and reduces operation and maintenance costs.
Patent Information
- Application Number
- CN202423140083.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Traditional 10kV switchgear operation relies on manual operation, which poses a risk of misoperation, increases the complexity and cost of operation and maintenance, especially in unattended substations or remote areas, and affects the safety and efficiency of the power system.
The switchgear is designed with one-button sequential control. It uses a programmable logic controller to be electrically connected to the circuit breaker and the three-position operating mechanism. It has a one-button sequential control logic program to realize the automation and interlocking of operations such as closing, opening, isolation and grounding. It is equipped with a monitoring module for real-time status feedback and fault early warning.
It improves the safety and efficiency of the power system, reduces operation and maintenance costs, ensures the accuracy and reliability of operation, reduces misoperation, and is suitable for unattended substations or remote areas.
Smart Images
Figure CN223797755U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to power system technical field especially relates to a switchgear of one button sequence control. BACKGROUND
[0002] Under the prior art framework, 10kV switch cabinet is the core component of power system, is responsible for performing line maintenance, equipment maintenance, load adjustment and other key tasks. The completion of these tasks depends on the closing, opening, isolation (as a special opening form) and grounding core operations. Closing operation ensures the smoothness of the circuit, and supplies power to the equipment. Opening operation cuts off the circuit to create a safe environment for maintenance. Isolation operation separates the device part from the power supply to prevent electric shock or short circuit during maintenance. Grounding operation connects the device to the ground to protect personal and equipment safety and prevent electric shock and lightning strikes.
[0003] However, these operations traditionally need to be completed manually by the operator on site, requiring high professional skills and rigorous attitude, and the switch cabinet needs to be equipped with complex safety protection measures. Despite this, human negligence is still difficult to avoid, which may cause equipment damage, power grid accidents or even personal injury. Especially in unattended power rooms or remote areas, a dedicated operator needs to be dispatched, increasing the complexity and cost of operation and maintenance and reducing the efficiency of the power system.
[0004] With the intensification of the automation and intelligentization trend of distribution network systems, we urgently need to develop an intelligent switch cabinet product that integrates closing, opening, isolation and grounding core functions and has one-key sequence control capability. SUMMARY
[0005] The utility model aims at overcoming the insufficient prior art and provides a switch cabinet of one button sequence control.
[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0007] The switch cabinet of one button sequence control is provided with a cabinet body and a control system arranged on the cabinet body. The control system includes a controller, a circuit breaker operating mechanism and a three-position operating mechanism. The controller is a programmable logic controller provided with a one-key sequence control logic program. The controller is electrically connected with the circuit breaker operating mechanism and the three-position operating mechanism, so that the controller controls the circuit breaker operating mechanism to perform closing and opening operations on the vacuum circuit breaker chamber of the switch cabinet through the one-key sequence control logic program, and controls the three-position operating mechanism to perform closing and opening operations on the grounding switch of the switch cabinet. An interlocking device is arranged between the circuit breaker operating mechanism and the three-position operating mechanism to ensure mutual locking during operation.
[0008] The utility model discloses, the controller is equipped with one button sequence control logic program, and the circuit breaker operating mechanism and three position operating mechanism are all connected with the controller through electric connection, ensure the accurate delivery of instruction. The controller passes through one button sequence control logic program, not only can control the circuit breaker operating mechanism to the vacuum circuit breaker chamber in switch cabinet carries out the closing and opening operation, still can command three position operating mechanism to carry out the closing and opening action of switch cabinet's earthing switch. And the interlocking device is arranged between the circuit breaker operating mechanism and three position operating mechanism, realizes the interlock function of both in operation, effectively prevents the occurrence of misoperation, effectively reduces the operation and maintenance cost and security problem of manual generation. Especially, the controller of the utility model has one button sequence control logic program, and the program can define and update the sequence control flow of different operation tasks (such as power transmission operation, power failure operation etc.) based on the operation specification and safety requirement of power system, and the program can guide the operation task to execute in sequence, and through the system records operation time, is convenient for post-stage information inquiry, analysis and inspection, improves the work efficiency of entire switch cabinet, protects programmable logic controller and entire switch cabinet from big damage. Compared with prior art, the automatic and intelligent technical means of the utility model effectively solve the problems existing in prior art, improve the safety, reliability and work efficiency of power system, reduce operation and maintenance cost, have remarkable technical progress and practical application value. It is to be explained that the electric connection in the utility model includes direct contact connection, connection through switch or relay control, or connection through capacitor, inductor and other elements.
[0009] Further, the circuit breaker operating mechanism is a full-electric vacuum circuit breaker operating mechanism. The circuit breaker operating mechanism in the scheme can accurately control the closing and opening operation of the vacuum circuit breaker, and closely cooperate with the programmable logic controller.
[0010] Further, the three position operating mechanism is a full-electric isolated grounding three position operating mechanism, which is provided with a closing position, a grounding position and an isolation position, and the closing position, the grounding position and the isolation position are all provided with electric operating mechanisms. In the scheme, the three position operating mechanism has high-precision position control capability and reliable mechanical transmission structure. When in the closing position, the three position operating mechanism is connected with the circuit breaker through the electric operating mechanism to realize the closing operation of the circuit; when in the grounding position, it is connected with the grounding switch to ensure the safe grounding of the equipment or line; and when in the isolation position, it cooperates with the isolation switch to realize the complete isolation of the circuit. It is to be explained that the closing position, the grounding position and the isolation position in the scheme respectively refer to the positions of the three position operating mechanism when the switch cabinet is in the working state, the test state and the maintenance state.
[0011] Further, the control system comprises a starting module and an executing module, the starting module comprises a plurality of starting circuits, the executing module is provided with an executing circuit corresponding to each starting module, the starting circuits are connected with the controller, the executing circuit is used to drive the circuit breaker operating mechanism and the three-position operating mechanism to work, and a relay is arranged on the starting circuit and connected to the corresponding executing circuit. According to the scheme, the controller is used to accurately control the signal of the starting circuit, and accurate control of the operating mechanism is realized. The modular design enhances the reliability of the system, ensures that a single circuit failure does not affect the overall operation, and is beneficial to the stability of the power system and rapid processing of faults.
[0012] Further, the starting module comprises an isolating switch closing starting circuit, an isolating switch opening starting circuit, a grounding switch closing starting circuit and a grounding switch opening starting circuit which are connected with the controller respectively; and the executing module is correspondingly provided with an isolating switch closing executing circuit, an isolating switch opening executing circuit, a grounding switch closing executing circuit and a grounding switch opening executing circuit. In the scheme, the executing module is provided with the corresponding executing circuit corresponding to each action of the three-position operating mechanism, and the starting module is provided with the starting circuit corresponding to each executing circuit, so that accurate control can be realized and misoperation can be avoided.
[0013] Further, the starting module comprises an isolating switch selecting starting circuit and a grounding switch selecting starting circuit, and the executing module is correspondingly provided with an isolating switch selecting executing circuit and a grounding switch selecting executing circuit, wherein the isolating switch selecting executing circuit and the grounding switch selecting executing circuit drive the interlocking device to select the isolating switch or the grounding switch. In the scheme, the starting circuit in the starting module is combined with the interlocking device, so that dangerous operation cannot be performed under unpermitted operation conditions (such as closing the isolating switch when the grounding switch is not opened), which is helpful to prevent misoperation and improve the safety of the power system.
[0014] Further, the starting module further comprises a circuit breaker closing starting circuit and a circuit breaker opening starting circuit, and the executing module is correspondingly provided with a circuit breaker closing executing circuit and a circuit breaker opening executing circuit. In the scheme, the executing module is provided with the corresponding executing circuit corresponding to each action of the circuit breaker operating mechanism, and the starting module is provided with the starting circuit corresponding to each executing circuit, so that accurate control can be realized and misoperation can be avoided.
[0015] Further, the monitoring module comprises a grounding switch monitoring circuit, an isolating switch monitoring circuit and a circuit breaker monitoring circuit connected with the controller respectively, the grounding switch monitoring circuit, the isolating switch monitoring circuit and the circuit breaker monitoring circuit check the states of the grounding switch, the isolating switch and the circuit breaker respectively and feed back to the control system. In the scheme, the real-time monitoring and feedback of the switch state by the monitoring module and the accurate control of the controller on the starting module and the execution module can significantly improve the accuracy of the power system operation and can discover and warn the fault in time, so that the automatic control and intelligent management of the power system are realized through the cooperative work of the controller, the monitoring module, the starting module and the execution module, and the operation efficiency and the management level are improved.
[0016] Further, the control system is further provided with a circuit breaker energy storage circuit, the circuit breaker energy storage circuit is provided with an energy storage switch, and the energy storage switch corresponds to the position of the isolating switch, so that the circuit breaker energy storage circuit is driven to be turned on after the isolating switch closing execution circuit is turned on, and vice versa. The scheme realizes the automation of the energy storage process through the linkage of the energy storage switch and the isolating switch closing execution circuit, and the linkage mechanism makes the maintenance and management of the system more convenient. The operating personnel can judge whether the energy storage motor and other components need to be maintained or replaced by monitoring the working state of the energy storage circuit.
[0017] Further, the monitoring module comprises a circuit breaker energy storage circuit, the circuit breaker energy storage circuit is provided with an energy storage switch, and the energy storage switch corresponds to the position of the isolating switch, so that the circuit breaker energy storage circuit is driven to be turned on after the isolating switch closing execution circuit is turned on, and vice versa. The scheme realizes the automation of the energy storage process through the linkage of the energy storage switch and the isolating switch closing execution circuit, and the linkage mechanism makes the maintenance and management of the system more convenient. The operating personnel can judge whether the energy storage motor and other components need to be maintained or replaced by monitoring the working state of the energy storage circuit. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 The principle of the utility model Figure 1 ;
[0019] Figure 2 The principle of the utility model Figure 2 ;
[0020] Figure 3 It is the circuit connection drawing of the controller;
[0021] Figure 4 It is the circuit layout drawing of the utility model. DETAILED DESCRIPTION
[0022] The embodiments of the utility model are described below in combination with the drawings:
[0023] Referring to Figures 1-4The utility model discloses a switchgear of one -key sequence control is equipped with the cabinet body and sets up the control system on the cabinet body, the control system includes controller PCL, circuit breaker operating mechanism and three position operating mechanism, the controller is programmable logic controller, and it is equipped with one -key sequence control logic program, the controller is electrically connected with circuit breaker operating mechanism, three position operating mechanism respectively, makes the controller through one -key sequence control logic program control circuit breaker operating mechanism executes the closing, opening operation of vacuum circuit breaker room of switchgear to control three position operating mechanism executes the closing, opening operation of switchgear's earthing switch, and still be provided with interlock between circuit breaker operating mechanism and three position operating mechanism to ensure that both realize interlock in the operation process.
[0024] The full-electric vacuum circuit breaker operating mechanism of the circuit breaker operating mechanism can accurately control the opening and closing operation of the vacuum circuit breaker, and is closely matched with the programmable logic controller
[0025] To make the three position operating mechanism have high-precision position control ability and reliable mechanical transmission structure, the three position operating mechanism adopts a full-electric isolated grounding three position operating mechanism, which is provided with a closing position, a grounding position and an isolation position, and the closing position, the grounding position and the isolation position are all provided with electric operating mechanisms, so that when the closing position is reached, the three position operating mechanism is connected to the circuit breaker through the electric operating mechanism to realize the closing operation of the circuit; when the grounding position is reached, it is connected to the grounding switch to ensure the safe grounding of the equipment or the line; and when the isolation position is reached, it cooperates with the isolation switch to realize the complete isolation of the circuit.
[0026] To make the control system have the advantages of precise control and high reliability, the control system includes a starting module and an execution module. The starting module includes a plurality of starting circuits, each of which is closely connected to the controller; and the execution module is provided with an execution circuit corresponding to each starting module for driving the key components such as the circuit breaker operating mechanism and the three position operating mechanism. In particular, each starting circuit is provided with a relay, and the contact of the relay is accurately connected to the corresponding execution circuit. Through the accurate control of the controller on the starting circuit signal, the scheme realizes the accurate control of the operating mechanism. In addition, the modular design not only enhances the overall reliability of the system, but also ensures that the normal operation of the entire system will not be affected when a single circuit fails, thereby facilitating the stability of the power system and the rapid handling of faults.
[0027] Specifically: the above-mentioned starting module includes isolating switch closing starting circuit, isolating switch opening starting circuit, grounding switch closing starting circuit and grounding switch opening starting circuit connected with the controller respectively; the execution module is correspondingly provided with isolating switch closing execution circuit 3, isolating switch opening execution circuit 4, grounding switch closing execution circuit 5 and grounding switch opening execution circuit 6. In the scheme, the execution module is provided with a corresponding execution circuit corresponding to each action of the three-position operating mechanism, and the starting module is provided with a starting circuit corresponding to each execution circuit, so that accurate control can be realized and misoperation can be avoided.
[0028] According to further optimization of the above scheme: the starting module includes isolating switch selection starting circuit and grounding switch selection starting circuit, and the execution module is correspondingly provided with isolating switch selection execution circuit 1 and grounding switch selection execution circuit 2, and the isolating switch selection execution circuit 1 and the grounding switch selection execution circuit 2 drive the interlocking device to select the isolating switch or the grounding switch. In the scheme, the starting circuit in the starting module is combined with the interlocking device, so that dangerous operation cannot be performed under unallowed operation conditions (such as attempting to close the isolating switch when the grounding switch is not opened), which helps to prevent misoperation and improve the safety of the power system. It should be noted that the interlocking device of the scheme can adopt the existing interlocking scheme for the three-position operating mechanism and the circuit breaker operating mechanism, and the utility model will not be described in detail.
[0029] In order to realize the control of the circuit breaker, the starting module further includes circuit breaker closing starting circuit and circuit breaker opening starting circuit, and the execution module is correspondingly provided with circuit breaker closing execution circuit 7 and circuit breaker opening execution circuit 8. In the scheme, the execution module is provided with a corresponding execution circuit corresponding to each action of the circuit breaker operating mechanism, and the starting module is provided with a starting circuit corresponding to each execution circuit, so that accurate control can be realized and misoperation can be avoided.
[0030] In order to realize the control of the circuit breaker, the starting module further includes circuit breaker closing starting circuit and circuit breaker opening starting circuit, and the execution module is correspondingly provided with circuit breaker closing execution circuit 7 and circuit breaker opening execution circuit 8. In the scheme, the execution module is provided with a corresponding execution circuit corresponding to each action of the circuit breaker operating mechanism, and the starting module is provided with a starting circuit corresponding to each execution circuit, so that accurate control can be realized and misoperation can be avoided.
[0031] The control system further has a circuit breaker energy storage circuit, which is provided with an energy storage switch corresponding to the position of the disconnecting switch, so that the disconnecting switch closing execution circuit 3 is turned on to drive the circuit breaker energy storage circuit to be turned on, and vice versa.
[0032] The monitoring module includes an energy storage monitoring circuit connected with the controller to monitor the state of the energy storage monitoring circuit.
[0033] The utility model further discloses a specific implementation example of the control system:
[0034] The cabinet outer wall is provided with a one-key sequential control power-on button digital control SB4 and a one-key sequential control power-off button SB5.
[0035] Referring to Figure 2 As shown in the figure, the starting module includes: a disconnecting switch selection starting circuit configured with a ninth relay KC9; a grounding switch selection starting circuit configured with a tenth relay KC10; a disconnecting switch closing starting circuit configured with a sixth relay KC6; a disconnecting switch opening starting circuit configured with a fifth relay KC5; a grounding switch closing starting circuit configured with a fourth relay KC4; a grounding switch opening starting circuit configured with a third relay KC3; a circuit breaker closing starting circuit configured with an eighth relay KC8; and a circuit breaker opening starting circuit configured with a seventh relay KC7.
[0036] The execution module includes: a disconnecting switch selection execution circuit 1 provided with a normally open contact of the ninth relay KC9; a grounding switch selection execution circuit 2 provided with a normally open contact of the tenth relay KC10; a disconnecting switch closing execution circuit 3 provided with a normally open contact of the sixth relay KC6; a disconnecting switch opening execution circuit 4 provided with a normally open contact of the fifth relay KC5; a grounding switch closing execution circuit 5 provided with a normally open contact of the fourth relay KC4; a grounding switch opening execution circuit 6 provided with a normally open contact of the third relay KC3; a circuit breaker closing execution circuit 7 provided with a normally open contact of the eighth relay KC8; and a circuit breaker opening execution circuit 8 provided with a normally open contact of the seventh relay KC7.
[0037] The monitoring module includes: a grounding switch monitoring circuit configured with a monitoring signal switch S42; a disconnecting switch monitoring circuit configured with a monitoring signal switch S5; a circuit breaker monitoring circuit configured with a circuit breaker monitoring signal switch S8; and an energy storage monitoring circuit configured with a circuit breaker monitoring signal switch S2.
[0038] Referring to the drawings, the controller is provided with a one-key sequential control logic program, an input interface and an output interface, the one-key sequential control logic program including a one-key sequential control power-on logic program 00 and a one-key sequential control power-off logic program 01.
[0039] Input interface:
[0040] Interface X00: receiving the signal of the one-key sequential control power-on button digital control SB4;
[0041] Interface X02: receiving the grounding switch opening signal (S42 switch signal), confirming that the grounding switch has been opened in the power-on process;
[0042] Interface X03: receiving the grounding switch closing signal (S42 switch signal), confirming that the grounding switch has been closed in the power-on process;
[0043] Interface X04: receiving the isolating switch opening signal (S5 switch signal), confirming that the isolating switch has been opened in the power-off process;
[0044] Interface X05: receiving the isolating switch closing signal (S5 switch signal), confirming that the isolating switch has been closed in the power-on process;
[0045] Interface X06: receiving the circuit breaker opening signal (S8 switch signal), confirming that the circuit breaker has been opened in the power-off process;
[0046] Interface X07: receiving the circuit breaker closing signal (S8 switch signal), confirming the state of the circuit breaker in the power-on and power-off processes;
[0047] Interface X08: receiving the energy storage signal (S2 switch signal), confirming that the energy storage of the circuit breaker has been completed in the power-on process.
[0048] Output interface:
[0049] Interface Y02: outputting the signal to start the third relay KC3, controlling the three-position operating mechanism to open the grounding switch;
[0050] Interface Y03: outputting the signal to start the fourth relay KC4, controlling the three-position operating mechanism to close the grounding switch;
[0051] Interface Y04: outputting the signal to start the fifth relay KC5, controlling the three-position operating mechanism to open the isolating switch;
[0052] Interface Y05: outputting the signal to start the sixth relay KC6, controlling the three-position operating mechanism to close the isolating switch;
[0053] Interface Y06: outputting the signal to start the seventh relay KC7, controlling the circuit breaker operating mechanism to open the circuit breaker;
[0054] Interface Y07: output signal starts the eighth relay KC8, controls the closing of the circuit breaker operating mechanism;
[0055] Interface Y08: output signal starts the tenth relay KC10, controls the selection of the ground switch (power-off process);
[0056] Interface Y09: output signal starts the ninth relay KC9, controls the selection of the disconnector output (power-on process).
[0057] Power-on process:
[0058] When the switch cabinet is in a cold standby state, i.e. the circuit breaker is in an open position and the grounding switch is in a closed position, the operator first presses the one-key sequence control power-on button SB4, which starts the one-key sequence control logic program 00 in the controller. The program execution process is as follows:
[0059] The controller receives the grounding switch closing signal from the monitoring signal switch S42 through the input interface X03, confirms that the grounding switch is indeed in a closed state, and delays for 3 seconds to ensure that the signal is stable and accurate.
[0060] Subsequently, the controller outputs a signal through the output interface Y02, which starts the third relay KC3, which drives the three-position operating mechanism to perform the opening operation of the grounding switch (i.e. disconnects the grounding switch). After the grounding switch is disconnected, the controller delays for 1 second, then disconnects Y02 output, at this time the grounding switch in the three-position operating mechanism should have been opened.
[0061] The controller then receives the grounding switch opening signal from the monitoring signal switch S42 through the input interface X02, confirms that the grounding switch has been successfully opened. After confirmation, it delays for another 3 seconds to ensure stable operation.
[0062] The controller outputs a signal through the output interface Y09, which starts the ninth relay KC9, performs the selection operation of the disconnector, and prepares for the subsequent closing of the disconnector. After the selection operation is completed, the controller delays for 1 second and then disconnects the Y09 output.
[0063] After another 3 seconds of delay, the controller outputs a signal through the output interface Y05, which starts the sixth relay KC6, which drives the three-position operating mechanism to perform the closing operation of the disconnector (i.e. closes the disconnector). After the disconnector is closed, the controller delays for 1 second and then disconnects the Y05 output.
[0064] When the three-position operating mechanism is in a closed state of the disconnector, the controller receives the disconnector closing signal from the monitoring signal switch S5 through the input interface X05. At the same time, the energy storage motor automatically starts the energy storage process, and the controller receives the energy storage completion signal from the monitoring signal switch S2 through the input interface X08.
[0065] After confirming the completion of energy storage, delay for 3 seconds, the controller outputs a signal through the output interface Y07 to start the eighth relay KC8, which drives the circuit breaker operating mechanism to perform the closing operation of the circuit breaker. After the closing operation of the circuit breaker is completed, delay for 1 second, the controller disconnects the Y07 output.
[0066] Finally, the controller receives the circuit breaker closing signal from the circuit breaker monitoring signal switch S8 through the input interface X07, and confirms that the circuit breaker has been successfully closed. At this point, the one-key sequence control power transmission process is completed, and the switch cabinet completes the power transmission operation.
[0067] Power-off process:
[0068] When the switch cabinet is in the power transmission state, i.e. the circuit breaker and the disconnector are both in the closed position (the circuit breaker closing signal is fed back from the circuit breaker monitoring signal switch S8, and the disconnector closing signal is fed back from the monitoring signal switch S5), the operator starts the one-key sequence control power-off button SB5 to start the one-key sequence control logic program 01 in the controller. The program execution process is as follows:
[0069] The controller receives the circuit breaker closing signal from the circuit breaker monitoring signal switch S8 through the input interface X07, confirms that the circuit breaker is indeed in the closed state, and delays for 3 seconds to ensure that the signal is stable and accurate.
[0070] Subsequently, the controller outputs a signal through the output interface Y06 to start the seventh relay KC7, which drives the circuit breaker operating mechanism to perform the opening operation of the circuit breaker (i.e. disconnect the circuit breaker). After the opening operation of the circuit breaker is completed, the controller delays for 1 second, then disconnects the Y06 output, and waits for the input interface X06 to receive the circuit breaker opening signal from the circuit breaker monitoring signal switch S8.
[0071] After confirming that the circuit breaker has been successfully opened, delay for 3 seconds, the controller outputs a signal through the output interface Y04 to start the fifth relay KC5, which drives the three-position operating mechanism to perform the opening operation of the disconnector (i.e. disconnect the disconnector). After the disconnector opening operation is completed, the controller delays for 1 second, then disconnects the Y04 output, and waits for the input interface X04 to receive the disconnector opening signal from the monitoring signal switch S5.
[0072] After confirming that the disconnector has been successfully opened, delay for 3 seconds, the controller outputs a signal through the output interface Y08 to start the tenth relay KC10 to perform the selection operation of the grounding switch, preparing for the subsequent closing of the grounding switch. After the selection operation is completed, delay for 1 second, the controller disconnects the Y08 output.
[0073] After delaying for 3 seconds, the controller outputs a signal through the output interface Y03 to start the fourth relay KC4, which drives the three-position operating mechanism to perform the closing operation of the grounding switch (i.e. close the grounding switch). After the closing operation of the grounding switch is completed, the controller delays for 1 second and then disconnects the Y03 output.
[0074] Finally, the controller receives the closing signal of the grounding switch from the monitoring signal switch S42 through the input interface X03, and confirms that the grounding switch has been successfully closed. At this point, the one-key sequential control power-off process is completed, and the switch cabinet completes the power-off operation.
[0075] In the utility model, the controller is provided with a one-key sequential control logic program, the circuit breaker operating mechanism and the three-position operating mechanism are connected with the controller through electrical connection, and the accurate transmission of the instruction is ensured. The controller can not only control the circuit breaker operating mechanism to perform the closing and opening operation on the vacuum circuit breaker chamber in the switch cabinet through the one-key sequential control logic program, but also can command the three-position operating mechanism to perform the closing and opening operation on the grounding switch of the switch cabinet. In addition, the interlocking device is arranged between the circuit breaker operating mechanism and the three-position operating mechanism, the interlocking function of the two in operation is realized, and the occurrence of the misoperation is effectively prevented. Compared with the prior art, the controller of the utility model is provided with a one-key sequential control logic program, the program is based on the operation specification and safety requirement of the power system, and defines the sequential control process of different operation tasks (such as power transmission operation, power-off operation and the like), which can record the operation time, operation content, device state before operation and device state after operation and the like, is convenient for the information query, analysis and inspection in the later period, improves the working efficiency of the whole switch cabinet, and protects the programmable logic controller and the whole switch cabinet from being damaged.
[0076] According to the disclosure and teaching of the above description, the technical personnel in the technical field of the utility model can also change and modify the above embodiment. Therefore, the utility model is not limited to the specific embodiment disclosed and described above, and some modifications and changes of the utility model should also fall within the protection scope of the claims of the utility model. In addition, although some specific terms are used in the specification, these terms are only for convenience of description, and do not constitute any limitation on the utility model.
Claims
1. A switchgear for one-key sequence control, characterized in that, The cabinet body is provided with a control system, which comprises a controller, a circuit breaker operating mechanism and a three-position operating mechanism. The controller is a programmable logic controller, which is provided with a one-key sequence control logic program. The controller is electrically connected with the circuit breaker operating mechanism and the three-position operating mechanism, so that the controller controls the circuit breaker operating mechanism to perform closing and opening operations on the vacuum circuit breaker chamber of the switch cabinet through the one-key sequence control logic program, and controls the three-position operating mechanism to perform closing and opening operations on the grounding switch of the switch cabinet. An interlocking device is arranged between the circuit breaker operating mechanism and the three-position operating mechanism to ensure mutual locking during operation.
2. Switchgear according to claim 1, characterized in that The circuit breaker operating mechanism is a full-electric vacuum circuit breaker operating mechanism.
3. Switchgear according to claim 1, characterized in that The three-position operating mechanism is a full-electric isolated grounding three-position operating mechanism, which is provided with a closing position, a grounding position and an isolation position, and is provided with an electric operating mechanism corresponding to the closing position, the grounding position and the isolation position.
4. Switchboard according to claim 1, characterized in that The control system comprises a starting module and an execution module. The starting module comprises a plurality of starting circuits, and the execution module is provided with an execution circuit corresponding to each starting module. The starting circuits are connected with the controller. The execution circuit is used to drive the circuit breaker operating mechanism and the three-position operating mechanism to work. A relay is arranged on the starting circuit, and the contact of the relay is connected to the corresponding execution circuit.
5. Switchgear according to claim 4, characterized in that The starting module comprises a disconnecting switch closing starting circuit, a disconnecting switch opening starting circuit, a grounding switch closing starting circuit and a grounding switch opening starting circuit which are respectively connected with the controller. The execution module is correspondingly provided with a disconnecting switch closing execution circuit, a disconnecting switch opening execution circuit, a grounding switch closing execution circuit and a grounding switch opening execution circuit.
6. Switchboard according to claim 4, characterized in that The starting module comprises a disconnecting switch selection starting circuit and a grounding switch selection starting circuit. The execution module is correspondingly provided with a disconnecting switch selection execution circuit and a grounding switch selection execution circuit. The disconnecting switch selection execution circuit and the grounding switch selection execution circuit respectively drive the interlocking device to select the disconnecting switch or the grounding switch.
7. Switchboard according to claim 4, characterized in that The starting module further comprises a circuit breaker closing starting circuit and a circuit breaker opening starting circuit. The execution module is correspondingly provided with a circuit breaker closing execution circuit and a circuit breaker opening execution circuit.
8. The switchgear of claim 1, wherein: The control system further comprises a monitoring module. The monitoring module comprises a grounding switch monitoring circuit, a disconnecting switch monitoring circuit and a circuit breaker monitoring circuit which are respectively connected with the controller. The grounding switch monitoring circuit, the disconnecting switch monitoring circuit and the circuit breaker monitoring circuit respectively monitor the states of the grounding switch, the disconnecting switch and the circuit breaker, and feed back to the control system.
9. Switchboard according to claim 5, characterized in that: The control system is further provided with a circuit breaker energy storage circuit, which is provided with an energy storage switch. The energy storage switch corresponds to the position of the disconnecting switch, so that the circuit breaker energy storage circuit is synchronously turned on when the disconnecting switch is closed, and is turned off when the disconnecting switch is opened.
10. Switchgear according to claim 9, characterized in that The control system further comprises a monitoring module. The monitoring module comprises an energy storage monitoring circuit which is connected with the controller to monitor the state of the energy storage monitoring circuit.