10kv high-voltage cabinet secondary circuit training demonstration device and verification method thereof

Abstract

The present application relates to a kind of 10kV high voltage cabinet secondary circuit training demonstration device and its verification method, the device includes movable support and demonstration board, demonstration board is provided with electrical diagram display area, device display area, operation area and function verification area, function verification area is provided with closing verification module, opening verification module, anti-jump function verification module and control circuit breakage verification module, electrical diagram display area is provided with high voltage cabinet secondary control circuit and breakage monitoring control circuit, and operation area is provided with operating switch.The device can show the switch and operating components required for 10kV high voltage cabinet switching operation on the same plane through electrical diagram display area, device display area, operation area and function verification area, combined with the high voltage cabinet secondary control circuit and breakage monitoring control circuit shown in electrical diagram display area for synchronous analysis, can accurately simulate 10kV high voltage cabinet switching operation secondary circuit and show to scholar, provide intuitive training effect.

Description

Technical Field

[0001] This invention relates to the field of training technology for secondary circuits in substation engineering, and in particular to a training demonstration device for secondary circuits of a 10kV high-voltage switchgear and its verification method. Background Technology

[0002] With the development of smart grids, in order to improve the equipment fault analysis capabilities of grassroots substation operation and maintenance personnel and enhance their technical skills, it is necessary to regularly train operation and maintenance personnel on the working principles of electrical equipment and fault diagnosis methods, based on their professional work requirements. In particular, it is essential to conduct comprehensive and intuitive analysis and learning on the secondary control circuits, where knowledge is often weak, to further equip operation and maintenance personnel with the ability to fully ensure the safety and reliability of daily operation and maintenance of substation equipment.

[0003] Currently, training on secondary control circuits in 10kV high-voltage switchgear of substations is limited to physical demonstrations and on-site equipment instruction. Because components are installed on different planes within the substation, and local space may be severely limited, there is a lack of intuitive and dedicated training spaces and facilities. Furthermore, the compact wiring layout of secondary circuits within the equipment enclosures makes them difficult to clearly demonstrate, posing a significant challenge for beginners in maintenance. Additionally, the training process for operation and maintenance personnel is greatly affected by outdoor environmental factors, hindering the regular implementation of skills training activities. Based on these issues, there is an urgent need for an open, visual training and teaching device suitable for substation equipment, enabling frontline operation and maintenance personnel to improve their ability to troubleshoot and analyze equipment secondary circuit faults and their technical skills. Summary of the Invention

[0004] This invention provides a training demonstration device and verification method for the secondary circuit of a 10kV high-voltage switchgear, which solves the technical problem that existing training on the secondary control circuit of a 10kV high-voltage switchgear in substations cannot demonstrate the wiring of the substation's secondary circuit, resulting in poor training effectiveness.

[0005] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0006] A training and demonstration device for the secondary circuit of a 10kV high-voltage switchgear includes a movable support and a demonstration board mounted on the support. The demonstration board is provided with an electrical diagram display area, a component display area, an operation area, and a function verification area. The function verification area is provided with a closing verification module, a tripping verification module, an anti-pumping function verification module, and a control circuit disconnection verification module. The electrical diagram display area is provided with the high-voltage switchgear secondary control circuit and the disconnection monitoring control circuit. The operation area is provided with an operation switch for controlling the operation of the high-voltage switchgear secondary control circuit and the disconnection monitoring control circuit.

[0007] The closing verification module is used to control the disconnection monitoring control circuit and the high-voltage cabinet secondary control circuit to meet the closing conditions through the operation switch, and then use the closing switch of the operation switch to perform closing verification.

[0008] The trip verification module is used to control the disconnection monitoring control circuit and the high-voltage cabinet secondary control circuit to meet the tripping conditions through the operation switch, and then use the tripping switch of the operation switch to perform tripping verification.

[0009] The anti-pumping function verification module is used to control the secondary control circuit of the high-voltage cabinet to meet the circuit breaker tripping conditions through the operation switch, and then use the closing switch of the operation switch to verify the anti-pumping function.

[0010] The control circuit disconnection verification module is used to perform disconnection verification by detecting the voltage at the connection terminals connected to the opening and closing circuits of the high-voltage cabinet secondary control circuit when the opening and closing circuits of the high-voltage cabinet are in an abnormal state.

[0011] Preferably, the operating switch includes a trip / close changeover switch, an energy storage micro switch, a test switch, a working switch, an energy storage switch, a near / remote control switch, a reclosing switch, a protection trip switch, an anti-pump relay, a closing switch, and a tripping switch; the high-voltage switchgear secondary control circuit includes a tripping circuit, a closing circuit, and an energy storage circuit; the disconnection monitoring and control circuit is equipped with a tripping relay and a closing relay, the tripping relay is also connected to a first terminal, the first terminal is connected to a second terminal and a first connection terminal of the closing circuit, the second terminal is connected to a second connection terminal of the closing circuit; the closing relay is also connected to a third terminal, the third terminal is connected to a third connection terminal of the tripping circuit.

[0012] Preferably, the closing conditions are as follows: controlling the open / close switch to the open position, the energy storage micro switch to the non-energy storage position, controlling the test switch, the working switch, and the energy storage switch to all start so that the energy storage element of the energy storage circuit is energized; controlling the energy storage micro switch to the energy-stored position and the contacts of the energy storage micro switch in the closing circuit to close so that the closing circuit is in the waiting-to-close state, controlling the contacts of the energy storage micro switch in the energy storage circuit to open and the energy storage switch to open; and controlling the near / far control switch to ground.

[0013] The closing verification using the closing switch of the aforementioned operating switch includes: controlling the closing switch to start, energizing the closing coil of the closing circuit; if the opening / closing selector switch is switched to the closing position, then the contacts of the opening / closing selector switch in the closing circuit are opened, the closing coil is de-energized, the energy storage micro switch is switched to the non-energy storage position, and the contacts of the reclosing switch are closed, thus completing the closing verification.

[0014] Preferably, the tripping conditions are: controlling the tripping / closing selector switch to the closed position, the energy storage micro switch to the non-energy storage position, controlling both the test switch and the working switch to start, so that the tripping circuit is in the tripping state and controlling the near-to-far control switch to be grounded;

[0015] The trip verification using the trip switch of the aforementioned operating switch includes: controlling the trip switch to start, energizing the trip coil of the trip circuit, and if controlling the trip-close switch to be thrown to the trip position, then the contacts of the trip-close switch in the trip circuit will open, the trip coil will be de-energized, and the contacts of the protection trip switch will close, thus completing the trip verification.

[0016] Preferably, the circuit breaker tripping condition is as follows: controlling the opening / closing selector switch to the closing position, activating the closing switch and the anti-pumping relay of the closing circuit; the anti-pumping function verification using the closing switch of the operating switch includes: closing the closing switch, and if the coil of the anti-pumping relay in the closing circuit is de-energized and its contacts are open, the anti-pumping function verification of the secondary control circuit of the high-voltage switchgear is completed.

[0017] Preferably, the control circuit disconnection verification module is further configured to obtain the voltage of the first terminal and the second terminal according to the abnormality of the closing circuit; if the voltage of the first terminal and the second terminal are both positive, then there is an internal fault in the 10kV high-voltage switchgear; if the voltage of the first terminal and the second terminal are both negative, then there is a fault in the protection trip switch of the 10kV high-voltage switchgear; it is also configured to obtain the voltage of the third terminal according to the abnormality of the opening circuit; if the voltage of the third terminal is positive, then there is an internal fault in the 10kV high-voltage switchgear; if the voltage of the third terminal is negative, then there is a fault in the protection trip switch of the 10kV high-voltage switchgear.

[0018] When the secondary control circuit of the high-voltage switchgear is in the open state, the trip relay is activated. If the closing coil of the closing circuit is burned out, the open / close switch is not switched properly, the energy storage micro switch is not engaged properly, and / or the negative current of the closing circuit cannot be transmitted to the first terminal, causing the trip relay to lose magnetism, then the closing circuit is abnormal at this time.

[0019] When the secondary control circuit of the high-voltage switchgear is in the closed state, the closing relay is activated; if the opening coil of the opening circuit is burned out, the opening / closing switch is not switched properly and / or the negative current of the opening circuit cannot be transmitted to the third terminal, causing the closing relay to lose magnetism, then the opening circuit is abnormal at this time.

[0020] Preferably, the 10kV high-voltage switchgear secondary circuit training demonstration device includes a drive display module, which drives the operation of display elements. The display elements are installed at the connection points of various devices in the high-voltage switchgear secondary control circuit and the disconnection monitoring control circuit. The display elements are used to monitor the operation status of the high-voltage switchgear secondary control circuit and the disconnection monitoring control circuit in real time. The drive display module includes a microprocessor and a display drive submodule and a signal transmission submodule connected to the microprocessor. The microprocessor outputs electrical signals to control the operation of the display elements, and the display drive submodule and the signal transmission submodule transmit the electrical signals to the display elements.

[0021] The present invention also provides a verification method for a 10kV high-voltage switchgear secondary circuit training demonstration device, which is applied to the aforementioned 10kV high-voltage switchgear secondary circuit training demonstration device. The verification method includes the following steps:

[0022] The operation switch controls the disconnection monitoring control circuit and the high-voltage cabinet secondary control circuit to meet the closing conditions, and then the closing switch of the operation switch is used to perform the closing verification.

[0023] The circuit breaker monitoring control circuit and the high-voltage cabinet secondary control circuit are controlled by the operation switch to meet the tripping conditions, and then the tripping switch of the operation switch is used to perform tripping verification.

[0024] The secondary control circuit of the high-voltage cabinet is controlled by the operation switch to meet the circuit breaker tripping conditions, and then the anti-tripping function is verified by the closing switch of the operation switch.

[0025] If the opening and closing circuits of the secondary control circuit of the high-voltage cabinet are in an abnormal state, the disconnection is checked by detecting the voltage at the connection terminals connected to the opening and closing circuits of the secondary control circuit of the high-voltage cabinet.

[0026] The closing conditions are as follows: control the opening / closing selector switch to the opening position, the energy storage micro switch to the non-energy storage position, control the test switch, working switch and energy storage switch to start so that the energy storage element of the energy storage circuit is energized; control the energy storage micro switch to the energy-stored position and the contacts of the energy storage micro switch in the closing circuit to close so that the closing circuit is in the waiting-to-close state, then control the contacts of the energy storage micro switch in the energy storage circuit to open and the energy storage switch to open; and control the near-field and remote control switch to be grounded.

[0027] The tripping conditions are as follows: control the tripping / closing switch to the closed position, control the energy storage micro switch to the non-energy storage position, control the test switch and the working switch to start, so that the tripping circuit is in the tripping state and control the near-far control switch to be grounded;

[0028] The circuit breaker tripping condition is as follows: controlling the opening / closing selector switch to be thrown to the closing position, and activating the anti-tripping relay of the closing switch and the closing circuit.

[0029] Preferably, the closing verification using the closing switch of the operating switch includes: controlling the closing switch to start, energizing the closing coil of the closing circuit, and if controlling the opening / closing selector switch to be thrown to the closing position, then the contacts of the opening / closing selector switch in the closing circuit are opened, the closing coil is de-energized, the energy storage switch is opened, and the contacts of the reclosing switch are closed, thus completing the closing verification;

[0030] The trip verification using the trip switch of the aforementioned operating switch includes: controlling the trip switch to start, energizing the trip coil of the trip circuit, and if controlling the trip-close switch to be thrown to the trip position, then the contacts of the trip-close switch in the trip circuit will open, the trip coil will be de-energized, and the contacts of the protection trip switch will close, thus completing the trip verification;

[0031] The anti-pumping function verification using the closing switch of the aforementioned operating switch includes: closing the closing switch; if the coil of the anti-pumping relay in the closing circuit is de-energized and its contacts are open, the anti-pumping function verification of the secondary control circuit of the high-voltage switchgear is completed.

[0032] Preferably, the verification method of the 10kV high-voltage switchgear secondary circuit training demonstration device includes: obtaining the voltage of the first terminal and the second terminal according to the abnormality of the closing circuit; if the voltage of the first terminal and the second terminal are both positive, then there is an internal fault in the 10kV high-voltage switchgear; if the voltage of the first terminal and the second terminal are both negative, then there is a fault in the protection trip switch of the 10kV high-voltage switchgear.

[0033] If the tripping circuit is abnormal, the voltage of the third terminal is obtained. If the voltage of the third terminal is positive, there is an internal fault in the 10kV high-voltage switchgear; if the voltage of the third terminal is negative, there is a fault in the protection tripping switch of the 10kV high-voltage switchgear.

[0034] When the secondary control circuit of the high-voltage switchgear is in the open state, the trip relay is activated. If the closing coil of the closing circuit is burned out, the open / close switch is not switched properly, the energy storage micro switch is not engaged properly, and / or the negative current of the closing circuit cannot be transmitted to the first terminal, causing the trip relay to lose its magnetism, then the closing circuit is abnormal at this time.

[0035] When the secondary control circuit of the high-voltage switchgear is in the closed state, the closing relay is activated; if the opening coil of the opening circuit is burned out, the opening / closing switch is not switched properly and / or the negative current of the opening circuit cannot be transmitted to the third terminal, causing the closing relay to lose its magnetism, then the opening circuit is abnormal at this time.

[0036] As can be seen from the above technical solutions, the embodiments of the present invention have the following advantages: The 10kV high-voltage switchgear secondary circuit training demonstration device and its verification method include a movable support and a demonstration board. The demonstration board is provided with an electrical diagram display area, a component display area, an operation area, and a function verification area. The function verification area is provided with a closing verification module, a tripping verification module, an anti-pumping function verification module, and a control circuit disconnection verification module. The electrical diagram display area is provided with a high-voltage switchgear secondary control circuit and a disconnection monitoring control circuit. The operation area is provided with an operation switch for controlling the operation of the high-voltage switchgear secondary control circuit and the disconnection monitoring control circuit. This 10kV high-voltage switchgear secondary circuit training and demonstration device, through its electrical diagram display area, component display area, operation area, and function verification area, can display the switches and operating components required for the opening and closing operations of the 10kV high-voltage switchgear on the same plane. Combined with the high-voltage switchgear secondary control circuit and disconnection monitoring control circuit displayed in the electrical diagram display area, it allows for synchronous analysis, accurately simulating the secondary circuit during the opening and closing operations of the 10kV high-voltage switchgear and providing a clear and intuitive training experience for learners. Furthermore, through the closing verification module, opening verification module, anti-pumping function verification module, and control circuit disconnection verification module in the function verification area, manual fault setting and troubleshooting training can be achieved through the coordination of the operation area, electrical diagram display area, and component display area. This enhances the training effect and solves the technical problem of existing training on the secondary control circuit knowledge of 10kV high-voltage switchgear in substations, which suffers from poor training effectiveness due to the inability to demonstrate substation secondary circuit wiring. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the structure of the 10kV high-voltage switchgear secondary circuit training demonstration device according to an embodiment of the present invention;

[0039] Figure 2This is an electrical schematic diagram of the secondary control circuit of the high-voltage switchgear in the training and demonstration device for the secondary circuit of the 10kV high-voltage switchgear described in this embodiment of the invention.

[0040] Figure 3 This is an electrical schematic diagram of the interrupted line monitoring and control circuit of the 10kV high-voltage switchgear secondary circuit training demonstration device according to an embodiment of the present invention.

[0041] Figure 4 This is a framework diagram of the drive display module in the 10kV high-voltage switchgear secondary circuit training demonstration device according to an embodiment of the present invention. Detailed Implementation

[0042] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0043] This application proposes a training demonstration device and verification method for the secondary circuit of a 10kV high-voltage switchgear, which solves the technical problem that existing training on the secondary control circuit of a 10kV high-voltage switchgear in substations cannot demonstrate the wiring of the substation's secondary circuit, resulting in poor training effectiveness.

[0044] Example 1:

[0045] Figure 1 This is a schematic diagram of the structure of the 10kV high-voltage switchgear secondary circuit training and demonstration device according to an embodiment of the present invention. Figure 2 This is an electrical schematic diagram of the secondary control circuit of the 10kV high-voltage switchgear secondary circuit training demonstration device according to an embodiment of the present invention. Figure 3 This is an electrical schematic diagram of the interrupted line monitoring and control circuit of the 10kV high-voltage switchgear secondary circuit training demonstration device according to an embodiment of the present invention. Figure 4 This is a framework diagram of the drive display module in the 10kV high-voltage switchgear secondary circuit training demonstration device according to an embodiment of the present invention.

[0046] like Figures 1 to 2As shown, the present invention provides a training and demonstration device for the secondary circuit of a 10kV high-voltage switchgear, including a movable support 10 and a demonstration board 20 mounted on the support 10. The demonstration board 20 is provided with an electrical diagram display area 21, a component display area 22, an operation area 23, and a function verification area 24. The function verification area 24 is provided with a closing verification module 241, a tripping verification module 242, an anti-pumping function verification module 243, and a control circuit disconnection verification module 244. The electrical diagram display area 21 is provided with the secondary control circuit of the high-voltage switchgear and the disconnection monitoring control circuit. The operation area 23 is provided with an operation switch for controlling the operation of the secondary control circuit of the high-voltage switchgear and the disconnection monitoring control circuit.

[0047] It should be noted that the demonstration board 20 integrates drawings, physical diagrams, physical components, and verification modules into one unit. Through the component display area 22, the operating switches required for the opening and closing operations of the 10kV high-voltage switchgear are laid out on the same plane. Combined with the analysis of the high-voltage switchgear secondary control circuit, disconnection monitoring control circuit, closing verification module, opening verification module, anti-pumping function verification module, and control circuit disconnection verification module, it realizes a 1:1 scale simulation of the complete control process of the secondary circuit in the opening and closing operations of the 10kV high-voltage switchgear. This increases the correspondence between the 10kV high-voltage switchgear equipment and secondary drawings, the practicality of personnel participation, the observability of switching changes, and the operability of fault diagnosis and measurement.

[0048] like Figure 1 As shown, in this embodiment of the invention, the bracket 10 is used to support the demonstration board 20.

[0049] It should be noted that the bracket 10 includes a support frame 11 and a pulley 12 installed at the bottom of the support frame 11. The bracket 10 of this 10kV high-voltage switchgear secondary circuit training demonstration device moves the demonstration board 20 through the pulley 12. Combined with the lightweight and small size of the demonstration board 20, it enables classroom-style training of the 10kV high-voltage switchgear secondary circuit training demonstration device, allowing for hands-on practice anytime and anywhere. Faults can also be set up for competitions to find defects.

[0050] like Figure 2 and Figure 3 As shown in this embodiment of the invention, the electrical diagram display area 21 is used to display the electrical schematic diagrams of the secondary control circuit and the disconnection monitoring control circuit of the high-voltage switchgear. The secondary control circuit of the high-voltage switchgear includes a tripping circuit, a closing circuit, and an energy storage circuit.

[0051] It should be noted that the disconnection monitoring and control circuit is also equipped with a warning light for disconnection alerts.

[0052] like Figure 1 As shown, in this embodiment of the invention, the device display area 22 is used to display various components in the secondary control circuit and the disconnection monitoring control circuit of the high-voltage switchgear.

[0053] It should be noted that the components include the opening / closing changeover switch SL3, the energy storage micro switch S1, the test switch S8, the working switch S9, the energy storage switch F1, the near / remote control switch QK, the energy storage element M, the closing switch HA, and the opening switch TA, etc. Among them, the energy storage element M can be an energy storage motor.

[0054] like Figure 1 As shown, in this embodiment of the invention, the operating area 23 is used to house the operating switches for the secondary control circuit and the disconnection monitoring control circuit of the high-voltage switchgear. The operating switches include a trip / close changeover switch SL3, an energy storage microswitch S1, a test switch S8, a working switch S9, an energy storage switch F1, a near / remote control switch QK, a reclosing switch HBJ, a protection trip switch TBJ, an anti-pumping relay K0, a closing switch HA, and a tripping switch TA.

[0055] It should be noted that the operating area 23 is equipped with terminal block X1, energy storage indicator PY1, remote trip button YTJ, remote close button YHJ, etc. Terminal block X1 is connected to each connection terminal of the secondary control circuit and the disconnection monitoring control circuit of the high-voltage cabinet, which facilitates the detection of the voltage of each connection terminal of the secondary control circuit and the disconnection monitoring control circuit through terminal block X1, and determines whether the secondary control circuit and the disconnection monitoring control circuit are normal. This greatly promotes the rapid mastery of the secondary circuit principle and fault diagnosis method by substation workers, saves the training cost of workers, and greatly improves the training quality and efficiency.

[0056] like Figure 3 As shown in this embodiment of the invention, the voltage of both the secondary control circuit of the high-voltage switchgear and the disconnection monitoring control circuit adopts 220V AC mains input, which has a high degree of matching with the external power supply. The disconnection monitoring control circuit is equipped with a trip relay TWJ and a close relay HWJ. The trip relay TWJ is also connected to the first terminal D47. The first terminal D47 is connected to the second terminal D46 and the first connection terminal 12 of the closing circuit. The second terminal D46 is connected to the second connection terminal 14 of the closing circuit. The close relay HWJ is also connected to the third terminal D45. The third terminal D45 is connected to the third connection terminal 31 of the tripping circuit.

[0057] It should be noted that the trip relay TWJ is the trip monitoring relay, which monitors the status of the closing circuit when the circuit breaker is in the tripped state. The closing relay HWJ is the closing monitoring relay, which monitors the status of the opening circuit when the circuit breaker is in the closed state. The warning light is used to issue a "circuit open" signal, which is generated by connecting the normally closed contact of the trip relay TWJ and the normally closed contact of the closing relay HWJ in series. Only when both the trip relay TWJ and the closing relay HWJ are de-energized, and their normally closed contacts are both closed, can the circuit be connected and the "circuit open" signal be issued.

[0058] like Figure 1 As shown, in this embodiment of the invention, the closing verification module 241 is used to control the disconnection monitoring control circuit and the high-voltage cabinet secondary control circuit to meet the closing conditions through an operating switch, and then performs closing verification using the closing switch of the operating switch. The opening verification module 242 controls the disconnection monitoring control circuit and the high-voltage cabinet secondary control circuit to meet the opening conditions through an operating switch, and then performs opening verification using the opening switch of the operating switch. The anti-pumping function verification module 243 is used to control the high-voltage cabinet secondary control circuit to meet the circuit breaker tripping conditions through an operating switch, and then performs anti-pumping function verification using the closing switch of the operating switch. The control circuit disconnection verification module 244 is used to perform disconnection verification by detecting the voltage at the connection terminals connected to the opening and closing circuits of the high-voltage cabinet secondary control circuit if the opening and closing circuits of the high-voltage cabinet are abnormal.

[0059] It should be noted that this 10kV high-voltage switchgear secondary circuit training demonstration device, through the cooperation of four areas—functional verification area 24, operation area 23, electrical diagram display area 21, and component display area 22—can accurately simulate the secondary circuit during the opening and closing operations of a 10kV high-voltage switchgear and display it to trainees, providing an intuitive training effect. Furthermore, through the closing verification module 241, opening verification module 242, anti-pumping function verification module 243, and control circuit disconnection verification module 244 in the functional verification area, after manually setting fault defects, the cooperation between the operation area 23, electrical diagram display area 21, and component display area 22 enables fault point troubleshooting training.

[0060] The 10kV high-voltage switchgear secondary circuit training and demonstration device provided by this invention includes a movable support and a demonstration board. The demonstration board is equipped with an electrical diagram display area, a component display area, an operation area, and a function verification area. The function verification area is equipped with a closing verification module, a tripping verification module, an anti-pumping function verification module, and a control circuit disconnection verification module. The electrical diagram display area is equipped with the high-voltage switchgear secondary control circuit and the disconnection monitoring control circuit. The operation area is equipped with an operation switch for controlling the operation of the high-voltage switchgear secondary control circuit and the disconnection monitoring control circuit. This 10kV high-voltage switchgear secondary circuit training and demonstration device, through its electrical diagram display area, component display area, operation area, and function verification area, can display the switches and operating components required for the opening and closing operations of the 10kV high-voltage switchgear on the same plane. Combined with the high-voltage switchgear secondary control circuit and disconnection monitoring control circuit displayed in the electrical diagram display area, it allows for synchronous analysis, accurately simulating the secondary circuit during the opening and closing operations of the 10kV high-voltage switchgear and providing a clear and intuitive training experience for learners. Furthermore, through the closing verification module, opening verification module, anti-pumping function verification module, and control circuit disconnection verification module in the function verification area, manual fault setting and troubleshooting training can be achieved through the coordination of the operation area, electrical diagram display area, and component display area. This enhances the training effect and solves the technical problem of existing training on the secondary control circuit knowledge of 10kV high-voltage switchgear in substations, which suffers from poor training effectiveness due to the inability to demonstrate substation secondary circuit wiring.

[0061] In one embodiment of the present invention, the closing conditions are as follows: the opening / closing switch S3 is switched to the opening position, the energy storage micro switch S1 is switched to the non-energy storage position, the test switch S8, the working switch S9, and the energy storage switch F14 are all activated to energize the energy storage element M in the energy storage circuit; the energy storage micro switch S1 is switched to the energy storage position and the contacts of the energy storage micro switch S1 in the closing circuit are closed, so that the closing circuit is in the waiting-to-close state, the contacts of the energy storage micro switch S1 in the energy storage circuit are opened and the energy storage switch F1 is opened; and the near-to-far control switch QK is grounded.

[0062] The closing verification using the operating switch includes: starting the closing switch HA, energizing the closing coil HC / Y3 in the closing circuit; if the opening / closing selector switch S3 is switched to the closing position, the contacts of the opening / closing selector switch S3 in the closing circuit will open, the closing coil HC / Y3 will be de-energized, the energy storage micro switch S1 will be switched to the non-energy storage position, and the contacts of the reclosing switch BHJ will close, thus completing the closing verification.

[0063] It should be noted that when the closing verification module 241 is in the closing condition, it indicates that the secondary control circuit of the high-voltage switchgear is in the open state, waiting to close. The closing of the contacts of the reclosing switch BHJ indicates that the high-voltage switchgear can achieve the protection reclosing output. In this embodiment, as... Figure 3As shown, grounding of the near-remote control switch QK means that the ③-④ connection terminals of the near-remote control switch QK are connected.

[0064] In one embodiment of the present invention, the tripping condition is as follows: control the tripping / closing switch S3 to the closed position, control the energy storage micro switch S1 to the non-energy storage position, control the test switch S8 and the working switch S9 to start, so that the tripping circuit is in the waiting-to-tripping state and control the near-far control switch QK to be grounded.

[0065] The trip verification using the trip switch with the operating switch includes: starting the trip switch TA, energizing the trip coil TQ / Y2 in the trip circuit; if the trip-close changeover switch S3 is thrown to the trip position, the contacts of the trip-close changeover switch S3 in the trip circuit will open, the trip coil TQ / Y2 will be de-energized, and the contacts of the protection trip switch TBJ will close, thus completing the trip verification.

[0066] It should be noted that when the trip verification module 242 is in the trip condition, it means that the secondary control circuit of the high-voltage switchgear is in the closed state and is waiting to trip.

[0067] like Figure 2 and Figure 3 As shown, in one embodiment of the present invention, the circuit breaker tripping condition is: controlling the opening and closing switch S3 to be thrown to the closing position, activating the closing switch HA and the anti-pumping relay K0 of the closing circuit; the anti-pumping function verification using the closing switch of the operating switch includes: closing the closing switch HA, if the coil of the anti-pumping relay K0 in the closing circuit is de-energized and its contacts are open, the anti-pumping function verification of the secondary control circuit of the high-voltage cabinet is completed.

[0068] It should be noted that the anti-pumping function verification using the closing switch of the operating switch is based on the premise that the secondary control circuit of the high-voltage cabinet is in the closed state. In this embodiment, the coil of the anti-pumping relay K0 is de-energized, that is, the contacts of the anti-pumping relay K0 in the closing circuit are open, which enables the secondary control circuit of the high-voltage cabinet to achieve the function of preventing "circuit breaker tripping".

[0069] In one embodiment of the present invention, the control circuit disconnection verification module 244 is further configured to obtain the voltage of the first terminal D47 and the second terminal D46 according to the abnormality of the closing circuit. If the voltage of the first terminal D47 and the second terminal D46 are both positive, then there is an internal fault in the 10kV high-voltage switchgear; if the voltage of the first terminal D47 and the second terminal D46 are both negative, then there is a fault in the protection trip switch of the 10kV high-voltage switchgear. It is also configured to obtain the voltage of the third terminal D45 according to the abnormality of the opening circuit. If the voltage of the third terminal D45 is positive, then there is an internal fault in the 10kV high-voltage switchgear; if the voltage of the third terminal D45 is negative, then there is a fault in the protection trip switch of the 10kV high-voltage switchgear.

[0070] When the secondary control circuit of the high-voltage switchgear is in the open state, the trip relay TWJ is activated. If the closing coil HC / Y3 of the closing circuit is burned out, the open / close switch S3 is not switched properly, the energy storage micro switch S1 is not thrown properly, and / or the negative current of the closing circuit cannot be transmitted to the first terminal D47, causing the trip relay TWJ to lose its magnetism, then the closing circuit is abnormal at this time.

[0071] When the secondary control circuit of the high-voltage switchgear is in the closed state, the closing position relay HWJ is activated; if the opening coil TQ / Y2 of the opening circuit is burned out, the opening / closing switch S3 fails to switch properly and / or the negative current of the opening circuit cannot be transmitted to the third terminal D45, causing the closing position relay HWJ to lose its magnetism, then the opening circuit is abnormal at this time.

[0072] It should be noted that when the trip relay TWJ starts, it means that the normally closed contact of the trip relay TWJ is open, and the normally closed contact of the closing relay HWJ is closed. The disconnection monitoring and control circuit does not issue a control-back disconnection signal. Conversely, when the closing relay HWJ starts, it means that the normally closed contact of the closing relay HWJ is open, and the normally closed contact of the trip relay TWJ is closed. The disconnection monitoring and control circuit does not issue a control-back disconnection signal. Figure 3 As shown, in this embodiment, the negative current in the closing circuit cannot be transmitted to the first terminal D47. This can be understood as follows: the negative current in the closing circuit cannot travel from QB:12 through the switching mechanism S3-Y3 to reach the first terminal D47 on the right side of the trip relay TWJ, causing the trip relay TWJ to demagnetize. The normally closed contact of the trip relay TWJ then closes, and the disconnection monitoring and control circuit sends a control-back disconnection signal. Similarly, the negative current in the opening circuit cannot be transmitted to the third terminal D45. This can be understood as follows: the negative current in the opening circuit cannot travel from QB:31 through the switching mechanism S3-Y2 to reach the third terminal D45 on the right side of the closing relay HWJ, causing the closing relay HWJ to demagnetize. The normally closed contact of the closing relay HWJ then closes, and the disconnection monitoring and control circuit sends a control-back disconnection signal.

[0073] like Figure 4 As shown, in one embodiment of the present invention, the 10kV high-voltage switchgear secondary circuit training demonstration device includes a drive display module, which is used to drive the operation of the display element LED. The display element is installed at each device connection point of the high-voltage switchgear secondary control circuit and the disconnection monitoring control circuit. The display element is used to monitor the operation status of the high-voltage switchgear secondary control circuit and the disconnection monitoring control circuit in real time. The drive display module includes a microprocessor and a display drive submodule and a signal transmission submodule connected to the microprocessor. The microprocessor is used to output electrical signals to control the operation of the display element, and the display drive submodule and the signal transmission submodule are used to transmit the electrical signals to the display element.

[0074] It should be noted that LED display elements are installed on the electrical diagram display area corresponding to the connection points of various components in the high-voltage switchgear secondary control circuit and the disconnection monitoring control circuit. These LEDs monitor in real time whether components such as the opening / closing transfer switch SL3, energy storage micro switch S1, test switch S8, working switch S9, energy storage switch F1, near / remote control switch QK, reclosing switch HBJ, protection trip switch TBJ, anti-pumping relay K0, closing switch HA, and opening switch TA have normal operating electrical signals. For example: if the LED corresponding to a component displays a green indicator light, it indicates that the component is working normally, representing that the component's contacts are closed, the coil is energized, or the corresponding circuit is conductive; if the LED displays a red indicator light, it indicates that the component is not working normally, representing that the component's contacts are open, the coil is de-energized, or the corresponding circuit is not conductive; if the LED displays a flashing indicator light, it indicates that the component or its corresponding circuit has malfunctioned. The 10kV high-voltage switchgear secondary circuit training and demonstration device can clearly display the specific operating status of the secondary control circuit through display elements.

[0075] In this embodiment of the invention, the voltage driving the display module is AC 220V converted to DC 5V, providing operating voltage to the microprocessor and all display components. The AC 220V to DC 5V conversion involves rectification, step-down, regulation, and filtering to output DC 5V, which is then transmitted to the microprocessor as a switching signal.

[0076] It should be noted that the drive display module converts four channels of AC 220V voltage / six channels of DC 220V voltage into DC 5V voltage through rectification, step-down, regulation, and filtering via an external power input port. This voltage is then sent to the microprocessor, and the display driver submodule transmits the electrical signals to the LED control ports connected to the display elements to achieve signal display. Simultaneously, the signal transmission submodule can transmit switching signals to the microprocessor for display element control. In this embodiment, the drive display module can also directly control all display elements through programming code, greatly simplifying the number of components in the high-voltage cabinet's secondary control circuit. The high-voltage cabinet's secondary control circuit uses 220V AC mains input, ensuring high compatibility with external power supplies. The display elements use AC 220V to DC 5V voltage, providing operating voltage to the microprocessor and all LED indicator lights, and also powering the switching signal conversion of components. The display driver submodule applies the electrical signals from the microprocessor to the LED control port, thereby achieving precise control of the display element. The signal transmission submodule removes noise, malfunctions, and errors from the electrical signal before connecting it to the microprocessor. This allows for precise capture of the control signals required by the secondary control circuit of the high-voltage switchgear, enabling flexible control of the display element's on / off state.

[0077] In this embodiment of the invention, the 10kV high-voltage switchgear secondary circuit training and demonstration device sets display elements at the connection points of various components in the high-voltage switchgear secondary control circuit and the disconnection monitoring control circuit. These display elements monitor whether there are conductive electrical signals at the connection points of each component in the high-voltage switchgear secondary control circuit, providing a clear and intuitive display of the specific operating status of the high-voltage switchgear secondary control circuit. This 10kV high-voltage switchgear secondary circuit training and demonstration device, after comprehensively considering the current situation and actual needs of substation maintenance personnel, arranges the switches and operating components required for the opening and closing operations of the 10kV high-voltage switchgear in a planar layout. It uses a drive display module to install monitoring display elements at the connection points of each component in the high-voltage switchgear secondary control circuit, thereby monitoring the conduction signal status at the connection points of the circuit components in real time. This greatly simplifies the number of components controlling the high-voltage switchgear secondary control circuit, enables visual analysis of the high-voltage switchgear secondary control circuit, and helps operators carry out equipment inspection and maintenance troubleshooting work in a timely and accurate manner. In addition, the demonstration board is characterized by its mobility, light weight, and small size through its support frame. Combined with functional verification methods in various scenarios, it can realize classroom-style training, save on training costs for operators, improve training quality and efficiency, and fill the gap in the current market for teaching demonstration devices for troubleshooting secondary circuit faults in high-voltage switchgear.

[0078] Example 2:

[0079] The present invention also provides a verification method for a 10kV high-voltage switchgear secondary circuit training demonstration device, which is applied to the aforementioned 10kV high-voltage switchgear secondary circuit training demonstration device. The verification method includes the following steps:

[0080] The operating switch controls the disconnection monitoring control circuit and the high-voltage cabinet secondary control circuit to meet the closing conditions, and then the closing switch of the operating switch is used to verify the closing.

[0081] The tripping conditions are met by controlling the disconnection monitoring control circuit and the high-voltage cabinet secondary control circuit through the operation switch. Then, the tripping verification is performed by using the tripping switch of the operation switch.

[0082] The secondary control circuit of the high-voltage cabinet is controlled by operating the switch to meet the circuit breaker tripping conditions, and then the anti-tripping function is verified by using the closing switch of the operating switch.

[0083] If the opening and closing circuits of the secondary control circuit of the high-voltage switchgear are in an abnormal state, the disconnection is checked by detecting the voltage at the connection terminals connected to the opening and closing circuits of the secondary control circuit of the high-voltage switchgear.

[0084] The closing conditions are as follows: the control switch for opening and closing is set to the open position, the energy storage microswitch is set to the non-energy storage position, the control switch for testing, the working switch, and the energy storage switch are all activated to energize the energy storage element in the energy storage circuit; the control switch for energy storage is set to the energy storage position and the contacts of the energy storage microswitch in the closing circuit are closed, so that the closing circuit is in the ready-to-close state, then the control switch for energy storage is set to open and the energy storage switch is opened; and the control switch for near and far control is grounded.

[0085] The tripping conditions are as follows: control the tripping / closing selector switch to the closed position, control the energy storage micro switch to the non-energy storage position, control both the test switch and the working switch to start, so that the tripping circuit is in the ready-to-tripping state and control the near-to-far control switch to be grounded.

[0086] The circuit breaker tripping condition is: the control switch for opening and closing is thrown to the closed position, and the anti-pumping relay of the closing switch and the closing circuit is activated.

[0087] In this embodiment of the invention, the closing verification using the closing switch of the operating switch includes: controlling the closing switch to start, energizing the closing coil of the closing circuit, and if controlling the opening and closing changeover switch to be thrown to the closing position, then the contacts of the opening and closing changeover switch in the closing circuit are opened, the closing coil is de-energized, the energy storage switch is opened, and the contacts of the reclosing switch are closed, thus completing the closing verification.

[0088] The trip verification using the operating switch includes: controlling the trip switch to start, energizing the trip coil in the trip circuit, and if the control switch to open is thrown to the trip position, the contacts of the switch to open in the trip circuit will open, the trip coil will be de-energized, and the contacts of the protection trip switch will close, thus completing the trip verification.

[0089] The anti-pumping function verification using the closing switch of the operating switch includes: closing the closing switch, if the coil of the anti-pumping relay in the closing circuit is de-energized and its contacts are open, the anti-pumping function verification of the secondary control circuit of the high-voltage cabinet is completed.

[0090] In this embodiment of the invention, the verification method of the 10kV high-voltage switchgear secondary circuit training demonstration device includes: obtaining the voltage of the first terminal and the second terminal according to the abnormality of the closing circuit; if the voltage of the first terminal and the second terminal are both positive, then there is an internal fault in the 10kV high-voltage switchgear; if the voltage of the first terminal and the second terminal are both negative, then there is a fault in the protection trip switch of the 10kV high-voltage switchgear.

[0091] If the trip circuit is abnormal, obtain the voltage of the third terminal. If the voltage of the third terminal is positive, there is an internal fault in the 10kV high-voltage switchgear; if the voltage of the third terminal is negative, there is a fault in the protection trip switch of the 10kV high-voltage switchgear.

[0092] When the secondary control circuit of the high-voltage switchgear is in the open state, the trip relay is activated. If the closing coil of the closing circuit is burned out, the open / close switch is not switched properly, the energy storage micro switch is not engaged properly, and / or the negative current of the closing circuit cannot be transmitted to the first terminal, causing the trip relay to lose its magnetism, then the closing circuit is abnormal at this time.

[0093] When the secondary control circuit of the high-voltage switchgear is in the closed state, the closing position relay is activated; if the opening coil of the opening circuit is burned out, the opening / closing switch is not switched properly and / or the negative current of the opening circuit cannot be transmitted to the third terminal, causing the closing position relay to lose magnetism, then the opening circuit is abnormal at this time.

[0094] It should be noted that the content of the 10kV high-voltage switchgear secondary circuit training demonstration device in Embodiment 2 has already been described in Embodiment 1, and the content of the 10kV high-voltage switchgear secondary circuit training demonstration device will not be described again in Embodiment 2.

[0095] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0096] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0097] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0098] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0099] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0100] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A training and demonstration device for the secondary circuit of a 10kV high-voltage switchgear, comprising a movable support and a demonstration board mounted on the support, characterized in that, The demonstration board is equipped with an electrical diagram display area, a component display area, an operation area, and a function verification area. The function verification area is equipped with a closing verification module, a tripping verification module, an anti-pumping function verification module, and a control circuit disconnection verification module. The electrical diagram display area is equipped with a high-voltage cabinet secondary control circuit and a disconnection monitoring control circuit. The operation area is equipped with operation switches for controlling the operation of the high-voltage cabinet secondary control circuit and the disconnection monitoring control circuit. The closing verification module is used to control the disconnection monitoring control circuit and the high-voltage cabinet secondary control circuit to meet the closing conditions through the operation switch, and then use the closing switch of the operation switch to perform closing verification. The trip verification module is used to control the disconnection monitoring control circuit and the high-voltage cabinet secondary control circuit to meet the tripping conditions through the operation switch, and then use the tripping switch of the operation switch to perform tripping verification. The anti-pumping function verification module is used to control the secondary control circuit of the high-voltage cabinet to meet the circuit breaker tripping conditions through the operation switch, and then use the closing switch of the operation switch to verify the anti-pumping function. The control circuit disconnection verification module is used to perform disconnection verification by detecting the voltage at the connection terminals connected to the opening and closing circuits of the high-voltage cabinet secondary control circuit when the opening and closing circuits of the high-voltage cabinet are in an abnormal state. The operating switches include a trip / close switch, an energy storage micro switch, a test switch, a working switch, an energy storage switch, a near / remote control switch, a reclosing switch, a protection trip switch, an anti-pumping relay, a closing switch, and a trip switch; the high-voltage switchgear secondary control circuit includes a trip circuit, a closing circuit, and an energy storage circuit; the disconnection monitoring and control circuit is equipped with a trip relay and a closing relay, the trip relay is also connected to a first terminal, the first terminal is connected to a second terminal and a first connection terminal of the closing circuit, the second terminal is connected to a second connection terminal of the closing circuit; the closing relay is also connected to a third terminal, the third terminal is connected to a third connection terminal of the trip circuit; The control circuit disconnection verification module is also used to obtain the voltage of the first terminal and the second terminal according to the abnormality of the closing circuit. If the voltage of the first terminal and the second terminal are both positive, then there is an internal fault in the 10kV high-voltage switchgear; if the voltage of the first terminal and the second terminal are both negative, then there is a fault in the protection trip switch of the 10kV high-voltage switchgear. It is also used to obtain the voltage of the third terminal according to the abnormality of the opening circuit. If the voltage of the third terminal is positive, then there is an internal fault in the 10kV high-voltage switchgear; if the voltage of the third terminal is negative, then there is a fault in the protection trip switch of the 10kV high-voltage switchgear. When the secondary control circuit of the high-voltage switchgear is in the open state, the trip relay is activated. If the closing coil of the closing circuit is burned out, the open / close switch is not switched properly, the energy storage micro switch is not engaged properly, and / or the negative current of the closing circuit cannot be transmitted to the first terminal, causing the trip relay to lose magnetism, then the closing circuit is abnormal at this time. When the secondary control circuit of the high-voltage switchgear is in the closed state, the closing relay is activated; if the opening coil of the opening circuit is burned out, the opening / closing switch is not switched properly and / or the negative current of the opening circuit cannot be transmitted to the third terminal, causing the closing relay to lose magnetism, then the opening circuit is abnormal at this time.

2. The 10kV high-voltage switchgear secondary circuit training and demonstration device according to claim 1, characterized in that, The closing conditions are as follows: control the opening / closing switch to the opening position, control the energy storage micro switch to the non-energy storage position, control the test switch, the working switch and the energy storage switch to start so that the energy storage element of the energy storage circuit is energized; control the energy storage micro switch to the energy storage position and control the contacts of the energy storage micro switch in the closing circuit to close so that the closing circuit is in the waiting-to-close state, then control the contacts of the energy storage micro switch in the energy storage circuit to open and the energy storage switch to open. And control the grounding of the near-field and remote-field switch; The closing verification using the closing switch of the aforementioned operating switch includes: controlling the closing switch to start, energizing the closing coil of the closing circuit; if the opening / closing selector switch is switched to the closing position, then the contacts of the opening / closing selector switch in the closing circuit are opened, the closing coil is de-energized, the energy storage micro switch is switched to the non-energy storage position, and the contacts of the reclosing switch are closed, thus completing the closing verification.

3. The 10kV high-voltage switchgear secondary circuit training and demonstration device according to claim 1, characterized in that, The tripping conditions are as follows: control the tripping / closing switch to the closed position, control the energy storage micro switch to the non-energy storage position, control the test switch and the working switch to start, so that the tripping circuit is in the tripping state and control the near-far control switch to be grounded; The trip verification using the trip switch of the aforementioned operating switch includes: controlling the trip switch to start, energizing the trip coil of the trip circuit, and if controlling the trip-close switch to be thrown to the trip position, then the contacts of the trip-close switch in the trip circuit will open, the trip coil will be de-energized, and the contacts of the protection trip switch will close, thus completing the trip verification.

4. The 10kV high-voltage switchgear secondary circuit training and demonstration device according to claim 1, characterized in that, The circuit breaker tripping condition is as follows: control the opening / closing selector switch to be thrown to the closing position, and activate the closing switch and the anti-pumping relay of the closing circuit; the anti-pumping function verification using the closing switch of the operating switch includes: closing the closing switch, and if the coil of the anti-pumping relay in the closing circuit is de-energized and its contacts are open, the anti-pumping function verification of the secondary control circuit of the high-voltage switchgear is completed.

5. The 10kV high-voltage switchgear secondary circuit training and demonstration device according to claim 1, characterized in that, The system includes a drive display module for driving the operation of display elements. The display elements are installed at the connection points of various devices in the high-voltage switchgear secondary control circuit and the disconnection monitoring control circuit. The display elements are used to monitor the operating status of the high-voltage switchgear secondary control circuit and the disconnection monitoring control circuit in real time. The drive display module includes a microprocessor and a display drive submodule and a signal transmission submodule connected to the microprocessor. The microprocessor outputs electrical signals to control the operation of the display elements, and the display drive submodule and the signal transmission submodule transmit the electrical signals to the display elements.

6. A verification method for a training demonstration device for the secondary circuit of a 10kV high-voltage switchgear, characterized in that, When applied to the 10kV high-voltage switchgear secondary circuit training and demonstration device as described in any one of claims 1-5, the verification method includes the following steps: The operation switch controls the disconnection monitoring control circuit and the high-voltage cabinet secondary control circuit to meet the closing conditions, and then the closing switch of the operation switch is used to perform the closing verification. The circuit breaker monitoring control circuit and the high-voltage cabinet secondary control circuit are controlled by the operation switch to meet the tripping conditions, and then the tripping switch of the operation switch is used to perform tripping verification. The secondary control circuit of the high-voltage cabinet is controlled by the operation switch to meet the circuit breaker tripping conditions, and then the anti-tripping function is verified by the closing switch of the operation switch. If the opening and closing circuits of the secondary control circuit of the high-voltage cabinet are in an abnormal state, the disconnection is checked by detecting the voltage at the connection terminals connected to the opening and closing circuits of the secondary control circuit of the high-voltage cabinet. The closing conditions are as follows: control the opening / closing selector switch to the opening position, the energy storage micro switch to the non-energy storage position, control the test switch, working switch and energy storage switch to start so that the energy storage element of the energy storage circuit is energized; control the energy storage micro switch to the energy-stored position and the contacts of the energy storage micro switch in the closing circuit to close so that the closing circuit is in the waiting-to-close state, then control the contacts of the energy storage micro switch in the energy storage circuit to open and the energy storage switch to open; and control the near-field and remote control switch to be grounded. The tripping conditions are as follows: control the tripping / closing switch to the closed position, control the energy storage micro switch to the non-energy storage position, control the test switch and the working switch to start, so that the tripping circuit is in the tripping state and control the near-far control switch to be grounded; The circuit breaker tripping condition is as follows: controlling the opening / closing selector switch to be thrown to the closing position, and activating the anti-tripping relay of the closing switch and the closing circuit.

7. The verification method for the 10kV high-voltage switchgear secondary circuit training demonstration device according to claim 6, characterized in that, The closing verification using the closing switch of the aforementioned operating switch includes: controlling the closing switch to start, energizing the closing coil of the closing circuit, and if controlling the opening / closing selector switch to be thrown to the closing position, then the contacts of the opening / closing selector switch in the closing circuit are opened, the closing coil is de-energized, the energy storage switch is opened, and the contacts of the reclosing switch are closed, thus completing the closing verification. The trip verification using the trip switch of the aforementioned operating switch includes: controlling the trip switch to start, energizing the trip coil of the trip circuit, and if controlling the trip-close switch to be thrown to the trip position, then the contacts of the trip-close switch in the trip circuit will open, the trip coil will be de-energized, and the contacts of the protection trip switch will close, thus completing the trip verification; The anti-pumping function verification using the closing switch of the aforementioned operating switch includes: closing the closing switch; if the coil of the anti-pumping relay in the closing circuit is de-energized and its contacts are open, the anti-pumping function verification of the secondary control circuit of the high-voltage switchgear is completed.

8. The verification method for the 10kV high-voltage switchgear secondary circuit training demonstration device according to claim 7, characterized in that, include: If the closing circuit is abnormal, the voltage of the first terminal and the second terminal is obtained. If the voltage of the first terminal and the second terminal are both positive, then there is an internal fault in the 10kV high-voltage switchgear; if the voltage of the first terminal and the second terminal are both negative, then there is a fault in the protection trip switch of the 10kV high-voltage switchgear. If the tripping circuit is abnormal, the voltage of the third terminal is obtained. If the voltage of the third terminal is positive, there is an internal fault in the 10kV high-voltage switchgear; if the voltage of the third terminal is negative, there is a fault in the protection tripping switch of the 10kV high-voltage switchgear. When the secondary control circuit of the high-voltage switchgear is in the open state, the trip relay is activated. If the closing coil of the closing circuit is burned out, the open / close switch is not switched properly, the energy storage micro switch is not engaged properly, and / or the negative current of the closing circuit cannot be transmitted to the first terminal, causing the trip relay to lose its magnetism, then the closing circuit is abnormal at this time. When the secondary control circuit of the high-voltage switchgear is in the closed state, the closing relay is activated; if the opening coil of the opening circuit is burned out, the opening / closing switch is not switched properly and / or the negative current of the opening circuit cannot be transmitted to the third terminal, causing the closing relay to lose its magnetism, then the opening circuit is abnormal at this time.

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