Electricity verification locking system and control method and state prompting method thereof

Abstract

The invention relates to the technical field of power equipment, and discloses an electricity testing locking system and a control method and a state prompting method thereof, which are used for still keeping the electricity testing locking of an isolation grounding device under the condition of power loss of a secondary power supply. An electricity testing locking controller in the electricity testing locking system is provided with a super capacitor which is charged when a secondary power supply works normally and responds to triggering of a power supply awakening button when the secondary power supply loses power, so that the super capacitor provides temporary electric energy for the electricity testing locking controller through an internal electrical loop; the super capacitor supplies power to the power supply module through a second normally open contact and a third normally open contact of the relay in the discharge control loop. The electricity verification locking controller is provided with a second open contact connected to the isolation grounding device switch unlocking loop. Therefore, unlocking and locking control is carried out on the isolation grounding device based on an unlocking and locking instruction output by the electricity testing and locking controller after electricity testing of the contact network.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power equipment, in particular to an electric test locking system and a control method and a state prompting method thereof. BACKGROUND

[0002] In a rail transit traction power supply system, an isolation grounding device is used to realize the opening and closing operation of the isolation switch and the grounding switch of the catenary. In order to protect the personal safety of the operator, a voltage sensor is usually arranged inside the device to monitor the voltage of the catenary in real time. When the catenary is electrified, the electric test locking function of the device will automatically lock the cabinet door electromagnetic lock of the device, so as to prohibit the operator from opening the cabinet door lock of the device, and through the electrified indicator light on the device panel, the operator is prompted that the primary busbar connected with the catenary inside is electrified, so as to protect the personal safety of the operator.

[0003] However, the above functions all need to be powered by the secondary power supply of the device itself. When the secondary power supply is powered off, the operator can only forcibly open the cabinet door by using a mechanical key and use a manual electric tester to test the electricity. This process has safety hazards. SUMMARY

[0004] The present application provides an electric test locking system and a control method and a state prompting method thereof, which are used to realize electric test locking and state prompting when the secondary power supply is powered off, so as to improve the safety of the operation process.

[0005] The first aspect of the present application provides an electric test locking system, comprising: a voltage sampling module, a power supply module, an electric test locking controller, a switch unlocking loop for controlling the isolation grounding device to perform unlocking operation, a super capacitor, a relay, and a power supply wake-up button. The electric test locking controller is provided with an electric test collection channel, a second open-out contact point for outputting the electric test result of the catenary, and a fourth open-out contact point for outputting the electric test result of the secondary power supply. The second open-out contact point is connected to the switch unlocking loop. The input end of the power supply module and the power supply end of the electric test locking controller are connected with an external secondary power supply. The output end of the power supply module is connected with the voltage sampling module and the switch unlocking loop. The relay comprises a first normally open contact point, a second normally open contact point, a third normally open contact point, and a coil. The second normally open contact point, the first normally open contact point, the coil, the fourth open-out contact point, and the third normally open contact point are connected in series to form a discharge control loop. The power supply wake-up button is connected in parallel with the first normally open contact point in the discharge control loop. The second normally open contact point and the third normally open contact point are connected to the input end of the power supply module, respectively. The super capacitor is connected with the charging output interface of the electric test locking controller and the discharge control loop. The electricity detection locking controller is used for controlling the fourth outgoing contact to be disconnected when the secondary power supply is normally powered, charging and storing energy for the super capacitor, and controlling the fourth outgoing contact to be closed in response to the triggering of the power supply wake-up button when the secondary power supply is powered off, so as to provide temporary working voltage for the electricity detection locking controller and the power supply module through the super capacitor, so as to realize the unlocking control of the isolation grounding device through the second outgoing contact after the catenary electricity detection.

[0006] In some examples, the voltage sampling module comprises a first voltage sensor and a second voltage sensor, and the electricity detection collection channel comprises a first electricity detection collection channel and a second electricity detection collection channel. The first voltage sensor is provided with a first input loop connected to the catenary loop and a first output loop connected to the first electricity detection collection channel. The second voltage sensor is provided with a second input loop connected to the catenary loop and a second output loop connected to the second electricity detection collection channel.

[0007] In some examples, the electricity detection locking system further comprises a first indicator lamp control loop for controlling the working of the catenary electrification indicator lamp, and the electricity detection locking controller is further provided with a first outgoing contact for outputting the catenary electricity detection result. The first outgoing contact is connected to the first indicator lamp control loop, and the output end of the power supply module is connected to the first indicator lamp control loop.

[0008] In some examples, the electricity detection locking system further comprises a second indicator lamp control loop for controlling the working of the secondary power supply power-off indicator lamp, and the electricity detection locking controller is further provided with a third outgoing contact for outputting the secondary power supply electricity detection result. The third outgoing contact is connected to the second indicator lamp control loop, and the output end of the power supply module is connected to the second indicator lamp control loop.

[0009] The second aspect of the present application provides a control method of an electricity detection locking system, which is applied to the above-mentioned electricity detection locking system and comprises the following steps: when the secondary power supply is normally powered, the fourth outgoing contact is controlled to be disconnected by the electricity detection locking controller, and the super capacitor is charged and stored energy; When the secondary power supply is powered off, the fourth outgoing contact is controlled to be closed by the electricity detection locking controller, and in response to the power supply wake-up operation, temporary working voltage is provided for the electricity detection locking controller and the power supply module through the super capacitor, so as to realize the unlocking control of the isolation grounding device through the second outgoing contact by the electricity detection locking controller after the catenary electricity detection, and the fourth outgoing contact is controlled to be disconnected when the super capacitor is discharged to a first preset time length, so as to stop the super capacitor power supply.

[0010] In some examples, after providing temporary operating voltage to the voltage detection interlock controller and the power module via the supercapacitor, the method further includes: In response to the contact network voltage testing operation, voltage is acquired through the voltage testing acquisition channel so that the voltage testing interlock controller can perform contact network voltage testing. If the contact wire voltage test result shows that the contact wire is energized, the second open contact is controlled not to open, so as to keep the switch unlocking circuit in the open state, thereby locking the isolation grounding device, and the fourth open contact is controlled to open after a second preset time to stop the power supply of the supercapacitor, wherein the second preset time is less than the first preset time.

[0011] In some examples, after the voltage is acquired through the voltage acquisition channel in response to the overhead contact line voltage testing operation, so that the voltage testing interlock controller performs overhead contact line voltage testing, the method further includes: If the contact network voltage test result is no voltage, then control the second open contact to open, and in response to the unlocking operation, conduct the switch unlocking circuit; The supercapacitor is controlled to stop discharging when the voltage detection interlock controller detects that the unlocked state of the isolation grounding device has been maintained for a second preset time. The supercapacitor is controlled to stop discharging when the unlocked state of the isolation grounding device is not detected for a third preset time, wherein the third preset time is less than the second preset time.

[0012] A third aspect of this application provides a control method for a voltage detection interlocking system, comprising acquiring a first voltage through a first voltage detection acquisition channel and acquiring a second voltage through a second voltage detection acquisition channel; When both the first voltage and the second voltage are less than a preset voltage threshold, the second open contact is controlled to open, and the switch unlocking circuit is connected in response to the unlocking operation to unlock the isolation grounding device. When at least one of the first voltage and the second voltage is greater than the voltage threshold, the second open contact is controlled not to open, so as to disconnect the switch unlocking circuit and lock the isolation grounding device.

[0013] The fourth aspect of this application provides a status indication method for a voltage detection interlocking system, wherein a first voltage is obtained through a first voltage detection acquisition channel, and a second voltage is obtained through a second voltage detection acquisition channel; When both the first voltage and the second voltage are less than a preset voltage threshold, the first open contact is controlled not to open, so as to keep the first indicator light control circuit in an open state. When at least one of the first voltage and the second voltage is greater than the voltage threshold, the first open contact is controlled to open to connect the first indicator light control circuit and illuminate the contact wire power indicator light.

[0014] The fifth aspect of this application provides a status indication method for a voltage detection interlocking system, comprising: controlling the third open contact not to open when the secondary power supply is supplied by the voltage detection interlocking controller, so as to maintain the disconnected state of the second indicator light control circuit; When the secondary power supply fails, the voltage detection interlock controller controls the third open contact to open, thereby connecting the second indicator light control circuit and illuminating the secondary power supply failure indicator light under the power supply of the supercapacitor.

[0015] In the technical solution provided in this application, a supercapacitor is installed on the voltage detection interlock controller. When the secondary power supply is normal, the supercapacitor is charged and stored. When the secondary power supply fails, a temporary energy storage module provides temporary power to the power module and the voltage detection interlock controller. This enables the voltage sampling module to collect voltage data from the contact network circuit when the secondary power supply fails, and the voltage detection interlock controller to perform contact network voltage detection. The second open contact connected to the switch unlocking circuit is used to control the on / off state of the switch unlocking circuit. This allows the voltage detection interlock controller to control the locking and unlocking of the isolation grounding device when the secondary power supply fails, thus improving operational safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the voltage detection display and voltage detection interlocking principle in the voltage detection interlocking system of this application; Figure 2 This is a schematic diagram of the discharge control circuit of the supercapacitor in the voltage detection interlocking system of this application; Figure 3 This is a schematic diagram of the interface of the voltage detection interlocking controller in the voltage detection interlocking system of this application; Figure 4 This is a schematic diagram of an embodiment of the control method for the voltage detection interlocking system in this application; Figure 5 This is a control logic diagram of the control method for the voltage detection interlocking system in this application; Figure 6 This is another control logic diagram of the control method for the voltage detection interlocking system in this application; Figure 7 This is a schematic diagram of another embodiment of the control method for the voltage detection interlocking system in this application; Figure 8 This is a schematic diagram of an embodiment of the status indication method of the voltage detection interlocking system in this application; Figure 9This is a schematic diagram of another embodiment of the status indication method of the voltage detection interlocking system in this application. Detailed Implementation

[0017] This application provides a voltage detection interlocking system and its control method and status indication method, which are used to realize the voltage detection interlocking function when the secondary power supply fails.

[0018] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. Furthermore, the terms “comprising” or “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0019] The voltage detection interlocking system 100 in this application is used for voltage detection display and voltage detection interlocking of isolation grounding devices. See [link to application]. Figures 1-3 As shown, the voltage detection interlocking system 100 includes a power supply module 110, a voltage sampling module 120, a voltage detection interlocking controller 1n, a switch unlocking circuit 130 for controlling the isolation grounding device to perform unlocking operations, a supercapacitor 141, a relay, and a power wake-up button 142.

[0020] The aforementioned voltage detection interlock controller is equipped with a voltage detection acquisition channel, a second output contact D02 for outputting the voltage detection result of the contact network, and a fourth output contact D02 for outputting the voltage detection result of the secondary power supply. The second output contact is connected to the switch unlocking circuit 130. The input terminal of the power module 110 and the power terminal of the voltage detection interlock controller are connected to an external secondary power supply (LN), and the output terminal of the power module 110 is connected to the voltage sampling module 120 and the switch unlocking circuit 130. See Figure 2 The aforementioned relay includes a first normally open contact KA1, a second normally open contact KA2, a third normally open contact KA3, and a coil KA. The second normally open contact KA2, the first normally open contact KA1, the coil KA, the fourth open contact D04, and the third normally open contact KA3 are connected in series to form a discharge control circuit 140. The power wake-up button 142 and the first normally open contact KA1 are connected in parallel in the discharge control circuit 140. The second normally open contact KA2 and the third normally open contact KA3 are respectively connected to the input terminals (C+ and C-) of the power module 110.

[0021] The supercapacitor 141 is connected to the charging output interface and the discharge control circuit 140 of the voltage detection interlock controller ln, such as... Figure 3 The 4X part of the LN interlocking controller for electrical testing.

[0022] The voltage detection interlock controller ln is used to control the fourth open contact D04 to open and charge the supercapacitor 141 to store energy when the secondary power supply is normal. When the secondary power supply fails, in response to the triggering of the power wake-up button 142, it controls the fourth open contact D04 to close, so as to provide temporary working voltage to the voltage detection interlock controller ln and the power module 110 through the supercapacitor 141, so as to realize the unlocking and unlocking control of the isolation grounding device through the second open contact D02 after the contact network voltage detection.

[0023] The aforementioned power wake-up button is a self-reset button. When the secondary power supply to the device fails, pressing the power wake-up button on the device panel activates the coil circuit of relay KA. At this time, the relay KA coil draws power from the supercapacitor, and the three normally open contacts of relay KA, KA1, KA2, and KA3, are respectively turned on. When the power wake-up button is released, KA1 continues to maintain the power circuit of coil KA, forming a self-holding state. After KA2 and KA3 are turned on, the supercapacitor supplies power to the voltage detection interlock controller through its internal electrical circuit, and externally supplies power to the DC12 power module through C+ and C-, further powering devices such as the voltage sensor, electromagnetic lock, contact wire energized indicator, and secondary power failure indicator.

[0024] The aforementioned fourth open contact D04 is a normally closed contact. When the voltage detection interlock controller detects that the secondary power supply of the device is normal and not de-energized, it will keep D04 in the open state. When the secondary power supply of the device is de-energized, D04 will return to normal closed because the voltage detection interlock controller is de-energized at this time. At this time, pressing the power wake-up button will allow the voltage detection interlock controller to receive power from the supercapacitor.

[0025] In this embodiment, the panel of the isolation grounding device is provided with an opening button 131 and an electromagnetic lock 132. The second opening contact D02, the opening button 131 and the electromagnetic lock 132 all form a switch unlocking circuit 130. When the second opening contact D02 and the opening button 131 are both in the closed state, the electromagnetic lock 132 can be unlocked. When either the second opening contact D02 or the opening button 131 is in the open state, the electromagnetic lock 132 cannot be unlocked.

[0026] The voltage sampling module 120 has a first voltage sensor V1 and a second voltage sensor V2, and the voltage detection acquisition channel includes a first voltage detection acquisition channel and a second voltage detection acquisition channel. The first voltage sensor is equipped with a first input circuit connected to the contact network circuit and a first output circuit connected to the first voltage detection and acquisition channel; the second voltage sensor is equipped with a second input circuit connected to the contact network circuit and a second output circuit connected to the second voltage detection and acquisition channel, such as... Figure 3 The first four contacts in the 3X input unit.

[0027] It is understandable that the isolation interlocking device is mainly used in the voltage detection operation of the contact network circuit of rail transit. It is connected to the contact network circuit through the primary coil circuit. The contact network circuit can include the contact network end, the grounding end (such as the rail), and the circuit consisting of the knife switch connected therein. The first voltage sensor V1 and the second voltage sensor V2 are used to collect the voltage between the contact network and the rail, and the collected voltage value is transmitted to the voltage detection interlocking controller through the first voltage detection acquisition channel and the second voltage detection acquisition channel.

[0028] In some feasible embodiments, the voltage detection interlocking system also includes a first indicator light control circuit 140 for controlling the operation of the contact wire energized indicator light 141, and the voltage detection interlocking controller ln is also provided with a first output contact D01 for outputting the contact wire voltage detection result; the first output contact D01 is connected to the first indicator light control circuit 140, and the output terminal of the power module 110 is connected to the first indicator light control circuit 140.

[0029] In some feasible embodiments, the voltage detection interlocking system also includes a second indicator control circuit 150 for controlling the operation of the secondary power failure indicator 151, and the voltage detection interlocking controller ln is also provided with a third output contact D03 for outputting the voltage detection result of the secondary power supply. The third open contact D03 is connected to the second indicator light control circuit 150, and the output terminal of the power module 110 is connected to the second indicator light control circuit 150.

[0030] See Figure 4 and Figure 5 This application also provides a control method for a voltage detection interlocking system, applied to the aforementioned voltage detection interlocking system. The control method specifically includes the following steps: S401. When the secondary power supply is in normal operation, the fourth open contact is controlled to disconnect by the voltage detection interlock controller, and the supercapacitor is charged and stored.

[0031] It can be understood that when the secondary power supply is normally supplied, the fourth open contact is controlled to disconnect by the voltage detection interlock controller. In this way, even if the power wake-up button is pressed, the supercapacitor cannot start discharging. The supercapacitor automatically charges and stores electrical energy when the secondary power supply is normally supplied.

[0032] S402. When the secondary power supply fails, the fourth open contact is closed by the voltage detection interlock controller. In response to the power wake-up operation, a temporary working voltage is provided to the voltage detection interlock controller and the power module through the supercapacitor. This enables the voltage detection interlock controller to control the interlocking of the isolation grounding device through the second open contact after the contact network is tested for voltage. When the supercapacitor discharges to the first preset time, the fourth open contact is opened to stop the supercapacitor power supply.

[0033] It can be understood that when the secondary power supply fails, the fourth open contact is closed by controlling the voltage detection interlock controller. When the power wake-up button is pressed, the supercapacitor starts to discharge and supplies power to the voltage detection interlock controller and the DC12V power supply. At this time, the device's automatic voltage detection display and voltage detection interlock function work normally.

[0034] Specifically, in response to the contact network voltage testing operation, voltage is acquired through the voltage testing acquisition channel so that the voltage testing interlock controller can perform contact network voltage testing. If the contact wire is found to be energized, the second open contact is controlled to remain closed to keep the switch unlocking circuit open, thereby locking the isolation grounding device. The fourth open contact is controlled to open after a second preset duration to stop the supercapacitor power supply. The second preset duration is shorter than the first preset duration.

[0035] If the contact network voltage test result is no voltage, the second open contact is controlled to open, and the unlocking operation is activated to unlock the circuit. The supercapacitor is controlled to stop discharging when the voltage test interlock controller detects the unlocked state of the isolation grounding device for a second preset time. The supercapacitor is controlled to stop discharging when the voltage test interlock controller does not detect the unlocked state of the isolation grounding device for a third preset time, wherein the third preset time is less than the second preset time.

[0036] The above-mentioned contact network voltage testing operation can be triggered by pressing the voltage testing button on the device panel. The first, second, and third preset durations can be set according to actual conditions, for example, 10s, 5s, and 3s respectively. After the time limit is exceeded, the supercapacitor discharge will automatically end to achieve low-power operation of the supercapacitor. See [link to relevant documentation]. Figure 6 This paper provides a low-power operating logic for supercapacitors.

[0037] See Figure 7 The control method for this voltage detection interlocking system may specifically include the following steps: S701. Obtain a first voltage through the first voltage detection acquisition channel, and obtain a second voltage through the second voltage detection acquisition channel.

[0038] It is understandable that, such as Figure 1 , Figure 3As shown, for the voltage detection circuit of the voltage detection interlock controller 1n, when the contact network circuit is energized, the first output circuit and the second output circuit will be energized, which will cause the first voltage detection acquisition channel of the voltage detection interlock controller 1n to acquire the first voltage, and the second voltage detection acquisition channel to acquire the second voltage.

[0039] S702. When both the first voltage and the second voltage are less than a preset voltage threshold, the second open contact is controlled to open, and the unlocking circuit of the switch is connected in response to the unlocking operation to unlock the isolation grounding device.

[0040] It is understandable that when both voltage sensors V1 and V2 are below the energized threshold, it indicates that the primary contact busbar inside the device is de-energized. The voltage detection interlock controller will then activate D02. At this time, pressing the door opening button will open the cabinet door of the device and allow for the corresponding operations.

[0041] S703: When at least one of the first voltage and the second voltage is greater than the voltage threshold, the second open contact is controlled not to open, so as to disconnect the switch unlocking circuit and lock the isolation grounding device.

[0042] Understandably, the main control board of the voltage detection interlock controller has a energized threshold. If either of the two voltage samples exceeds this threshold, it indicates that the primary contact busbar inside the device is energized. The voltage detection interlock controller will then activate D02 but not the interlock button. In this situation, even pressing the door open button will prevent the cabinet door from opening, thus protecting the safety of the operators. This method effectively protects the personal safety of on-site operators and prevents electric shock.

[0043] In one embodiment, see Figure 8 This application also provides a status indication method for a voltage detection interlocking system applied to the voltage detection interlocking system described above. The status indication method for the voltage detection interlocking system specifically includes the following steps: S801. Obtain the first voltage through the first voltage detection acquisition channel, and obtain the second voltage through the second voltage detection acquisition channel.

[0044] It is understandable that, such as Figure 1 and Figure 3 As shown, for the voltage detection circuit of the voltage detection interlock controller 1n, when the contact network circuit is energized, the first output circuit and the second output circuit will be energized, which will cause the first voltage detection acquisition channel of the voltage detection interlock controller 1n to acquire the first voltage, and the second voltage detection acquisition channel to acquire the second voltage.

[0045] S802. When both the first voltage and the second voltage are less than the preset voltage threshold, the first output contact is controlled not to open, so as to keep the first indicator light control circuit in the open state.

[0046] It is understandable that, such as Figure 1 and Figure 3 As shown, when both voltage sensors V1 and V2 are below the energized threshold, it indicates that the primary contact busbar inside the device is de-energized. The voltage detection interlock controller retracts D01, and the contact wire energized indicator light goes out.

[0047] S803 When at least one of the first voltage and the second voltage is greater than the voltage threshold, the first open contact is controlled to open to connect the first indicator light control circuit and illuminate the contact wire energized indicator light.

[0048] It is understandable that, such as Figure 1 and Figure 3 As shown, when either of the two voltage sensors exceeds the energized threshold, it indicates that the primary contact busbar inside the device is energized. The voltage detection interlock controller then activates D01, illuminating the contact wire energized indicator light. This setup allows for visualization of the contact wire energization results when either voltage sensor detects energization, improving operational safety.

[0049] In one embodiment, see see Figure 9 This application also provides a status indication method for a voltage detection interlocking system applied to the voltage detection interlocking system described above. The status indication method for the voltage detection interlocking system may further include the following steps: S901. When the secondary power supply is supplied, the voltage detection interlock controller controls the third output contact not to open, thereby keeping the control circuit of the second indicator light in an open state.

[0050] It is understandable that, such as Figure 1 and Figure 3 As shown, a secondary power failure indicator light is installed on the panel of the isolation grounding device. A third open contact is added to the voltage detection interlock controller to control the secondary power failure indicator light. D03 is a normally closed open contact. When the voltage detection interlock device detects that the secondary power supply is energized, D03 remains open, and the secondary power failure indicator light goes out.

[0051] S902. When the secondary power supply fails, the voltage detection interlock controller controls the third open contact to open, thereby connecting the second indicator light control circuit and illuminating the secondary power supply failure indicator light under the power supply of the supercapacitor.

[0052] It is understandable that, such as Figure 1 and Figure 3As shown, when the secondary power supply of the device fails, the voltage detection interlock controller is also de-energized. At this time, D03 returns to the normally closed state. Through the power circuit of the secondary power failure indicator light, when the power wake-up button is pressed, the supercapacitor discharges to the DC12V power module, which lights up the secondary power failure indicator light, thus reminding the operators that the secondary power supply has failed and that the secondary power supply of the device should be restored as soon as possible.

[0053] 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.

[0054] 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 this application, 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 this application. 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.

[0055] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 this application.

Claims

1. A charge detection lock system, characterized by, include: The system includes a voltage sampling module, a power supply module, a voltage detection interlock controller, a switch unlocking circuit for controlling the unlocking operation of the isolation grounding device, a supercapacitor, a relay, and a power wake-up button. The voltage detection interlock controller is equipped with a voltage detection acquisition channel, a second output contact for outputting the voltage detection result of the contact network, and a fourth output contact for outputting the voltage detection result of the secondary power supply. The second output contact is connected to the switch unlocking circuit. The input terminal of the power module and the power terminal of the voltage detection interlock controller are connected to an external secondary power supply, and the output terminal of the power module is connected to the voltage sampling module and the switch unlocking circuit. The relay includes a first normally open contact, a second normally open contact, a third normally open contact, and a coil. The second normally open contact, the first normally open contact, the coil, the fourth normally open contact, and the third normally open contact are connected in series to form a discharge control circuit. The power wake-up button is connected in parallel with the first normally open contact in the discharge control circuit. The second normally open contact and the third normally open contact are respectively connected to the input terminal of the power module. The supercapacitor is connected to the charging output interface of the voltage detection interlock controller and the discharge control circuit. The voltage detection interlock controller is used to control the fourth open contact to open and charge the supercapacitor when the secondary power supply is normal, and to control the fourth open contact to close in response to the triggering of the power wake-up button when the secondary power supply fails, so as to provide a temporary working voltage to the voltage detection interlock controller and the power module through the supercapacitor, so as to realize the unlocking and unlocking control of the isolation grounding device through the second open contact after the contact network voltage detection.

2. The charge detection lock system of claim 1, wherein, The voltage sampling module includes a first voltage sensor and a second voltage sensor, and the voltage detection acquisition channel includes a first voltage detection acquisition channel and a second voltage detection acquisition channel. The first voltage sensor is provided with a first input circuit connected to the contact network circuit and a first output circuit connected to the first voltage detection acquisition channel; The second voltage sensor is provided with a second input circuit connected to the contact network circuit and a second output circuit connected to the second voltage detection acquisition channel.

3. The charge detection lock system of claim 2, wherein, It also includes a first indicator light control circuit for controlling the operation of the power indicator light of the contact network, and the power detection interlock controller is also provided with a first output contact for outputting the power detection result of the contact network. The first open contact is connected to the first indicator light control circuit, and the output terminal of the power module is connected to the first indicator light control circuit.

4. The charge detection lock system of claim 1, wherein It also includes a second indicator control circuit for controlling the operation of the secondary power failure indicator, and the voltage detection interlock controller is also provided with a third output contact for outputting the voltage detection result of the secondary power supply. The third open contact is connected to the second indicator light control circuit, and the output terminal of the power module is connected to the second indicator light control circuit.

5. A control method of an electroscope locking system, characterized by, The voltage detection interlocking system applied to any one of claims 1-4, wherein the control method of the voltage detection interlocking system includes: When the secondary power supply is normally powered, the fourth outgoing contact is controlled to be disconnected by the voltage detection locking controller, and the super capacitor is charged to store energy; When the secondary power supply is powered off, the fourth outgoing contact is controlled to be closed by the voltage detection locking controller, and a temporary working voltage is provided to the voltage detection locking controller and the power supply module by the super capacitor in response to a power supply wake-up operation, so that the voltage detection locking controller controls the isolation grounding device through the second outgoing contact after the catenary is electrified, and controls the fourth outgoing contact to be disconnected when the super capacitor is discharged for a first preset time length, so as to stop the super capacitor power supply.

6. The control method of the charge detection interlock system according to claim 5, characterized by, After the temporary working voltage is provided to the voltage detection locking controller and the power supply module by the super capacitor, the method further comprises: In response to a catenary electrification operation, voltage acquisition is performed through the voltage detection acquisition channel, so that the voltage detection locking controller performs catenary electrification; If the catenary electrification result is that the catenary is electrified, the second outgoing contact is controlled not to be outgoing, so as to keep the switch unlocking loop disconnected, to lock the isolation grounding device, and control the fourth outgoing contact to be disconnected when the time length continues for a second preset time length, so as to stop the super capacitor power supply, wherein the second preset time length is less than the first preset time length.

7. The control method of the charge detection interlock system according to claim 6, characterized by, After the voltage acquisition is performed through the voltage detection acquisition channel in response to the catenary electrification operation, so that the voltage detection locking controller performs catenary electrification, the method further comprises: If the catenary electrification result is not electrified, the second outgoing contact is controlled to be outgoing, and the switch unlocking loop is turned on in response to an unlocking operation; The super capacitor is controlled to end discharging by the voltage detection locking controller when the unlocking state of the isolation grounding device is detected to continue for a second preset time length; The super capacitor is controlled to end discharging by the voltage detection locking controller when the unlocking state of the isolation grounding device is not detected to continue for a third preset time length, wherein the third preset time length is less than the second preset time length.

8. A control method of an electroscope locking system, characterized by, The control method of the voltage detection locking system as claimed in claim 2 comprises: The first voltage is obtained through the first voltage detection acquisition channel, and the second voltage is obtained through the second voltage detection acquisition channel; When the first voltage and the second voltage are both less than a preset voltage threshold, the second outgoing contact is controlled to be outgoing, and the switch unlocking loop is turned on in response to an unlocking operation, so as to unlock the isolation grounding device; When at least one of the first voltage and the second voltage is greater than the voltage threshold, the second outgoing contact is controlled not to be outgoing, so as to disconnect the switch unlocking loop and lock the isolation grounding device.

9. A method of indicating the state of an electrosensitive lock system, characterized in that The state prompting method of the voltage detection locking system as claimed in claim 3 comprises: The first voltage is obtained through the first voltage detection acquisition channel, and the second voltage is obtained through the second voltage detection acquisition channel; When both the first voltage and the second voltage are less than a preset voltage threshold, the first open contact is controlled not to open, so as to maintain the off state of the first indicator lamp control circuit; When at least one of the first voltage and the second voltage is greater than the voltage threshold, the first open contact is controlled to open, so as to turn on the first indicator lamp control circuit and light up the contact net electrification indicator lamp.

10. A method of indicating the state of an electrosensitive lock system, characterized in that The state prompting method is applied to the electrification detection locking system as claimed in claim 4, and comprises: When the secondary power supply is powered on, the third open contact is controlled not to open by the electrification detection locking controller, so as to maintain the off state of the second indicator lamp control circuit; When the secondary power supply is powered off, the third open contact is controlled to open by the electrification detection locking controller, so as to turn on the second indicator lamp control circuit and light up the secondary power supply powered-off indicator lamp under the power supply of the super capacitor.

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