Lightning arrester action simulation test method and system and power supply device

Abstract

The invention discloses a method and system for simulating a lightning arrester action test and a power supply device, and relates to the field of lightning arrester action tests.The system comprises an uninterruptible power supply system, a voltage regulator, an isolation transformer, a rectifier, an alternating current and direct current change-over switch and a protection circuit, and the uninterruptible power supply system, the voltage regulator, the isolation transformer, the rectifier and the protection circuit are connected in sequence; a terminal on one side, which is not connected with the rectifier, of the protection circuit is a connecting end used for being connected with a secondary side terminal of the voltage transformer; one end of the AC-DC change-over switch is connected with the input end of the rectifier, and the other end of the AC-DC change-over switch is connected with the output end of the rectifier; a primary side terminal of the voltage transformer is a lightning cut-off voltage input end; and a secondary side terminal of the voltage transformer is used for supplying power to a controller of the automatic recloser. According to the invention, stable, adjustable and safe electric energy can be provided for the secondary side terminal of the voltage transformer in a lightning arrester action simulation test.

Description

Technical Field

[0001] This application relates to the technical field of arrester operation tests, and particularly to a method, a system, and a power supply device for simulating an arrester operation test. Background Art

[0002] An automatic recloser is a highly intelligent switching device that has a controller itself and can automatically perform opening or reclosing operations according to a set program under different line conditions, and then automatically reset or lock. The controller of the automatic recloser can be powered by the secondary side of a potential transformer (PT). Specifically, the primary side of the potential transformer can be connected to the power grid, so that an induced electromotive force is generated on the secondary side and powers the controller of the automatic recloser. Arresters are often connected to the power grid to protect electrical equipment connected to the power grid from the harm of high transient overvoltages generated by lightning strikes. When the arrester operates (i.e., grounds), a current with an extremely fast rate of change and an extremely high peak value will be generated in the power grid, and then a voltage with an extremely fast rate of change and an extremely high peak value will also be generated on the secondary side of the potential transformer. This voltage with an extremely fast rate of change and an extremely high peak value may cause the controller of the automatic recloser to malfunction (such as the controller reseting), and may even cause damage to the controller of the automatic recloser.

[0003] Therefore, it is necessary to test the controller of the automatic recloser before it is put into use. Summary of the Invention

[0004] In view of the above problems, this application provides a method, a system, and a power supply device for simulating an arrester operation test, so as to achieve the purpose of providing stable, adjustable, and safe electric energy for the secondary side terminals of the potential transformer in the simulated arrester operation test. The specific solutions are as follows:

[0005] A first aspect of this application provides a power supply device for simulating an arrester operation test, including: an uninterruptible power supply system, a voltage regulator, an isolation transformer, a rectifier, an AC / DC changeover switch, and a protection circuit.

[0006] The uninterruptible power supply system has a power input terminal. The power output terminal of the uninterruptible power supply system is connected to the input terminal of the voltage regulator. The output terminal of the voltage regulator is connected to the input terminal of the isolation transformer. The output terminal of the isolation transformer is connected to the input terminal of the rectifier. The output terminal of the rectifier is connected to one terminal of the protection circuit. The other terminal of the protection circuit is a connection terminal for connecting to the secondary side terminals of the potential transformer.

[0007] One end of the AC / DC changeover switch is connected to the input terminal of the rectifier, and the other end of the AC / DC changeover switch is connected to the output terminal of the rectifier.

[0008] The primary side terminal of the voltage transformer is the lightning cut-off voltage input terminal, and the lightning cut-off voltage input to the lightning cut-off voltage input terminal is used to simulate the voltage generated when the lightning arrester operates;

[0009] The secondary side terminal of the voltage transformer is used to supply power to the controller of the automatic reclosing switch.

[0010] In a possible implementation manner, it further includes: a voltage measurement device and a time delay relay,

[0011] The time delay relay is arranged on the line between the voltage measurement device and the secondary side terminal of the voltage transformer. The time delay relay is in a closed state when the voltage regulator adjusts the voltage at the output end of the voltage regulator and delays to disconnect; the time delay relay is also in a closed state when the voltage measurement device measures the voltage and delays to disconnect.

[0012] In a possible implementation manner, it further includes: a remote operation module, a human-computer interaction module, and a grounding module,

[0013] The human-computer interaction module is respectively connected to the remote operation module, the voltage regulator, the rectifier, and the grounding module.

[0014] In a possible implementation manner, the protection circuit includes: a first resistor, a second resistor, a first inductor, a second inductor, and a first capacitor;

[0015] The first end of the first resistor is connected to the first end of the first inductor, the first end of the second resistor is connected to the first end of the second inductor, the first end of the first capacitor is connected to the first end of the first resistor, and the second end of the first capacitor is connected to the first end of the second resistor;

[0016] The second end of the first inductor is connected to one secondary side terminal of the voltage transformer, and the second end of the second inductor is connected to the other secondary side terminal of the voltage transformer,

[0017] The second ends of the first resistor and the second resistor are connected to the output end of the rectifier.

[0018] In a possible implementation manner, it further includes: a voltage divider. The first input end of the voltage divider is connected to one secondary side terminal of the voltage transformer through one of the time delay relays, and the second input end of the voltage divider is connected to the other secondary side terminal of the voltage transformer through the other time delay relay,

[0019] The voltage measurement device is connected to the output end of the voltage divider.

[0020] In a possible implementation, it further includes: a housing and a grounding module. The uninterruptible power supply system, voltage regulator, isolation transformer, and rectifier are all arranged inside the housing.

[0021] The grounding module includes: a grounding switch and an infrared sensing device. The infrared sensing device is arranged on the panel of the housing. The infrared sensing device is connected to the grounding switch, and the grounding switch is connected to the housing. When the infrared sensing device outputs a signal that meets the requirements, the grounding switch closes to ground the housing. When the infrared sensing device does not output a signal that meets the requirements, the grounding switch opens.

[0022] In a possible implementation, an insulating support and universal wheels are further arranged below the housing, and the bottom of the housing is connected through the insulating support and the universal wheels.

[0023] In a possible implementation, it further includes: a human-machine interaction module arranged on the housing. The human-machine interaction module is respectively connected to the voltage regulator, the rectifier, and the grounding module. A manual control button is also arranged on the housing. The manual control button includes: an emergency stop button, a DC / AC switching button, a manual boost button, and a manual step-down button.

[0024] The second aspect of this application provides a system for simulating the operation test of a lightning arrester, including: a voltage transformer and a power supply device for simulating the operation test of a lightning arrester provided in the first aspect or any implementation manner of the first aspect. The primary side terminal of the voltage transformer is a lightning cut-off voltage input terminal, and the lightning cut-off voltage input to the lightning cut-off voltage input terminal is used to simulate the voltage generated when the lightning arrester operates.

[0025] The secondary side terminal of the voltage transformer is used to supply power to the controller of the automatic reclosing switch, and the housing of the voltage transformer is grounded.

[0026] The second aspect of this application provides a method for simulating the operation test of a lightning arrester, including:

[0027] Powering the secondary side terminal of the voltage transformer through the power supply device for simulating the operation test of a lightning arrester provided in the first aspect or any implementation manner of the first aspect. Among them, the secondary side terminal of the voltage transformer is connected to the controller of the automatic reclosing switch to supply power to the controller of the automatic reclosing switch, and the housing of the voltage transformer is grounded.

[0028] Inputting a lightning cut-off voltage to the primary side terminal of the voltage transformer.

[0029] With the above technical solutions, a method, a system and a power supply device for simulating the operation test of a lightning arrester provided by this application can be powered by an uninterruptible power supply system, effectively ensuring the stability of power supply; the output voltage can be adjusted by a voltage regulator, the voltage regulator and the uninterruptible power supply system are protected by an isolation transformer, a DC voltage or an AC voltage can be selected for output through a rectifier and an AC / DC changeover switch, and a protection circuit is used to prevent the adverse effects brought by the lightning cut-off voltage on the primary side of the voltage transformer to devices such as the uninterruptible power supply system, the voltage regulator, the isolation transformer, and the rectifier. It can be seen that a power supply device for simulating the operation test of a lightning arrester provided by this application can provide stable, adjustable and safe electric energy for the secondary side terminals of the voltage transformer in the simulation of the operation test of the lightning arrester. Description of the Drawings

[0030] In combination with the drawings and with reference to the following specific embodiments, the above and other features, advantages and aspects of the various embodiments of the present disclosure will become more apparent. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic and the original parts and elements are not necessarily drawn to scale.

[0031] Figure 1 It is a schematic structural diagram of a power supply device for simulating the operation test of a lightning arrester provided by this application;

[0032] Figure 2 It is a schematic structural diagram of a protection circuit provided by this application;

[0033] Figure 3 It is a schematic structural diagram of another power supply device for simulating the operation test of a lightning arrester provided by this application;

[0034] Figure 4 It is a schematic structural diagram of another power supply device for simulating the operation test of a lightning arrester provided by this application;

[0035] Figure 5 It is a schematic structural diagram of another power supply device for simulating the operation test of a lightning arrester provided by this application;

[0036] Figure 6 It is a schematic structural diagram of another power supply device for simulating the operation test of a lightning arrester provided by this application;

[0037] Figure 7 It is a schematic structural diagram of the housing of a power supply device for simulating the operation test of a lightning arrester provided by this application;

[0038] Figure 8 It is a schematic connection diagram of the grounding switch and the housing provided by this application;

[0039] Figure 9Flow chart of a method for simulating the operation test of a lightning arrester provided by this application. Detailed implementation manners

[0040] The embodiments of this application will be described below in conjunction with the accompanying drawings in the embodiments of this application. The terms used in the implementation manners part of this application are only used to explain the specific embodiments of this application, rather than being intended to limit this application.

[0041] The embodiments of this application will be described below in conjunction with the accompanying drawings. Those of ordinary skill in the art will know that with the development of technology and the emergence of new scenarios, the technical solutions provided by the embodiments of this application are equally applicable to similar technical problems.

[0042] The terms "first", "second", etc. in the description and claims of this application and the above-mentioned accompanying drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, which is only a way of distinction adopted when describing objects with the same attributes in the embodiments of this application. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, so that a process, method, system, product or device including a series of units does not have to be limited to those units, but may include other units not clearly listed or inherent to these processes, methods, products or devices.

[0043] As Figure 1 shown, a power supply device for simulating the operation test of a lightning arrester provided by an embodiment of the present invention includes: an uninterruptible power supply system 100, a voltage regulator 200, an isolation transformer 300, a rectifier 400, an AC-DC changeover switch 500, and a protection circuit 600.

[0044] The uninterruptible power supply system 100 has a power input terminal. The power output terminal of the uninterruptible power supply system 100 is connected to the input terminal of the voltage regulator 200. The output terminal of the voltage regulator 200 is connected to the input terminal of the isolation transformer 300. The output terminal of the isolation transformer 300 is connected to the input terminal of the rectifier 400. The output terminal of the rectifier 400 is connected to one side terminal of the protection circuit 600. The other side terminal of the protection circuit 600 is a connection terminal for connecting the secondary side terminal of the voltage transformer 700. Among them, the secondary side terminal of the voltage transformer 700 is Figure 1 the middle terminals a and b. Using the uninterruptible power supply system 100 as the loop input power supply, the input method is flexible, the device can be portable and movable, and the uninterruptible power supply system 100 can be used as a filtering device to further reduce the interference to the commercial power and avoid the air switch tripping of the commercial power.

[0045] One end of the AC-DC conversion switch 500 is connected to the input end of the rectifier 400, and the other end of the AC-DC conversion switch 500 is connected to the output end of the rectifier 400.

[0046] The primary side terminals of the voltage transformer 700 (i.e., Figure 1 terminal c and terminal d in the middle) are the lightning cut-off voltage input terminals, and the lightning cut-off voltage input to the lightning cut-off voltage input terminals is used to simulate the impulse voltage generated when the lightning arrester operates.

[0047] The secondary side terminals of the voltage transformer 700 are used to supply power to the controller of the automatic reclosing switch.

[0048] The uninterruptible power supply system 100 can be charged with commercial power usually and supply power to the subsequent circuit separately during the test. It is not directly connected to the ground potential, which can avoid the influence of the ground potential rise caused by the lightning cut-off voltage on the primary side of the voltage transformer 700 discharging to the ground.

[0049] The voltage regulator 200 is used for boosting and bucking to be applicable to output different voltage values. The voltage regulator 200 can be divided into automatic control and manual control. The present application can also be provided with a manual boosting button and a manual bucking button for controlling the voltage regulator 200 on the shell of the power supply device for simulating the lightning arrester operation test, for manual boosting or bucking.

[0050] The isolation transformer 300 is used to isolate the ground potential rise caused by the lightning cut-off voltage on the primary side of the voltage transformer 700 discharging to the ground, and is also used to isolate the overvoltage generated after the lightning cut-off voltage is coupled to the secondary side through the primary side of the voltage transformer 700, to protect the voltage regulator 200 and the uninterruptible power supply system 100.

[0051] The rectifier 400 is used to convert the AC voltage into a DC voltage. The rectifier 400 is connected in parallel with the AC-DC conversion switch 500, and the output can be selected as an AC voltage or a DC voltage by controlling the closing and opening of the AC-DC conversion switch 500, to be applicable to different working environments. Specifically, when the AC-DC conversion switch 500 is opened, the DC voltage is output; when the AC-DC conversion switch 500 is closed, the AC voltage is output.

[0052] The protection circuit 600 is used to suppress the ground potential rise caused by the lightning cut-off voltage on the primary side of the voltage transformer 700 discharging to the ground, and the overvoltage coupled to the secondary side through the primary side of the voltage transformer 700, to protect the isolation transformer 300, the rectifier 400, the voltage regulator 200 and the uninterruptible power supply system 100.

[0053] Figure 1The connections between the uninterruptible power supply system 100, the voltage regulator 200, the isolation transformer 300, the rectifier 400, the AC-DC changeover switch 500, and the protection circuit 600 are only schematic. In actual applications, the output and input ends of the uninterruptible power supply system 100, the voltage regulator 200, the isolation transformer 300, and the rectifier 400 can each have at least two terminals. At this time, two lines (such as a positive connection line and a negative connection line) can be used to connect to the terminals of different electrical devices. Correspondingly, the two terminals on both sides of the protection circuit 600 can also each have at least two terminals, and two lines (such as a positive connection line and a negative connection line) can be used for connection.

[0054] A power supply device for simulating the operation test of a lightning arrester provided by an embodiment of the present invention can be powered by the uninterruptible power supply system 100, effectively ensuring the stability of the power supply; the output voltage is adjusted by the voltage regulator 200, the voltage regulator 200 and the uninterruptible power supply system 100 are protected by the isolation transformer 300, the output DC voltage or AC voltage can be selected through the rectifier 400 and the AC-DC changeover switch 500, and the protection circuit 600 is used to prevent the adverse effects brought by the lightning cut-off voltage on the primary side of the voltage transformer 700 to devices such as the uninterruptible power supply system 100, the voltage regulator 200, the isolation transformer 300, and the rectifier 400. It can be seen that a power supply device for simulating the operation test of a lightning arrester provided by the present application can provide stable, adjustable and safe electric energy for the secondary side terminals of the voltage transformer 700 in the simulation of the operation test of the lightning arrester. By simulating the voltage generated on the secondary side terminals of the voltage transformer 700 due to the operation of the lightning arrester, the working conditions of the controller of the automatic reclosing switch under this voltage can be tested, so as to optimize the automatic reclosing switch or other devices according to the test results to improve the working performance of the controller of the automatic reclosing switch under this voltage.

[0055] Optionally, as Figure 2 shown, the protection circuit 600 may include: a first resistor R1, a second resistor R2, a first inductor L1, a second inductor L2, and a first capacitor C1.

[0056] The first end of the first resistor R1 is connected to the first end of the first inductor L1, the first end of the second resistor R2 is connected to the first end of the second inductor L2, the first end of the first capacitor C1 is connected to the first end of the first resistor R1, and the second end of the first capacitor C1 is connected to the first end of the second resistor R2.

[0057] The second end of the first inductor L1 is connected to one secondary side terminal of the voltage transformer 700, and the second end of the second inductor L2 is connected to the other secondary side terminal of the voltage transformer 700.

[0058] The second terminal of the first resistor R1 and the second terminal of the second resistor R2 are connected to the output terminal of the rectifier 400.

[0059] Under normal operating conditions, the current flowing through the two resistors and the two inductors is very small, and the voltage drop and power loss are very small; the voltage across the first capacitor C1 is about 220V. Optionally, the first capacitor C1 is selected to be in the microfarad range, and the current flowing through the first capacitor C1 is several tens of milliamperes.

[0060] When the lightning cut-off voltage applied to the primary side of the voltage transformer 700 is cut off by the rod-rod gap and a ground discharge occurs, the discharge voltage frequency is in the MHz range or higher. At this time, the first inductor and the second inductor first attenuate the overvoltage for the first time; at high frequencies, the impedance of the first capacitor is small, and most of the energy of the overvoltage is absorbed by the first capacitor, thereby attenuating the overvoltage for the second time; the first resistor and the second resistor can attenuate the overvoltage for the third time, further suppressing the forward transmission of the overvoltage to the isolation transformer 300. It can be seen that the protection circuit 600 protects the isolation transformer 300, the rectifier 400, the voltage regulator 200 and the uninterruptible power supply system 100.

[0061] Optionally, the first capacitor, the first resistor, the second resistor, the first inductor and the second inductor can be of adjustable structure, and their values can be easily changed. For example, they can be adjustable resistors, or removable designs, and are equipped with components of various specifications.

[0062] As Figure 3 shown, the power supply device for simulating the lightning arrester action test provided by the embodiment of the present invention may further include: a voltage measuring device 810 and a time-delay relay 820.

[0063] The delay relay 820 is arranged on the line between the voltage measuring device 810 and the secondary side terminal of the voltage transformer 700. The delay relay 820 is in a closed state when the voltage regulator 200 adjusts the voltage at the output end of the voltage regulator 200, and delays to open; the delay relay 820 is also in a closed state when the voltage measuring device 810 measures the voltage, and delays to open. When the voltage regulator 200 adjusts the voltage at the output end of the voltage regulator 200, it is necessary for the voltage measuring device 810 to measure the voltage of the secondary side terminal of the voltage transformer 700. At this time, it is necessary for the delay relay 820 to be in a closed state. After the voltage adjustment is completed, the delay relay 820 can be disconnected. In this way, when subsequent tests are carried out, the voltage measuring device 810 can be protected from overvoltage damage. Of course, in addition to measuring the voltage of the secondary side terminal when the voltage regulator 200 adjusts the voltage at the output end of the voltage regulator 200, the user can also manually control the voltage measuring device 810 to measure the voltage of the secondary side terminal of the voltage transformer 700. At this time, it is necessary for the delay relay 820 to be in a closed state. After the voltage measurement is completed, the delay relay 820 can be disconnected. In this way, when subsequent tests are carried out, the voltage measuring device 810 can be protected from overvoltage damage.

[0064] As Figure 4 shown, the power supply device for simulating the action test of the lightning arrester provided by the embodiment of the present invention may further include: a voltage divider 830. The first input end of the voltage divider 830 is connected to a secondary side terminal of the voltage transformer 700 through a delay relay 820, and the second input end of the voltage divider 830 is connected to another secondary side terminal of the voltage transformer 700 through another delay relay 820.

[0065] The voltage measuring device 810 is connected to the output end of the voltage divider 830.

[0066] Specifically, the voltage divider 830 may include a second capacitor C2 and a third capacitor C3. Wherein, the common end of the second capacitor C2 and the third capacitor C3 is the output end of the voltage divider 830.

[0067] Optionally, when measuring AC voltage, both the high-voltage arm and the low-voltage arm of the voltage divider 830 may be capacitors; when measuring DC voltage, the voltage divider 830 may be a resistive voltage divider. Of course, the voltage divider 830 may also be a resistive-capacitive parallel universal voltage divider 830, so that both AC voltage and DC voltage can be measured.

[0068] Optionally, the housing of the voltage divider 830 is not grounded to avoid damage caused by the elevation of the ground potential.

[0069] As Figure 5 shown, in Figure 1On the basis of the above, the power supply device for simulating the arrester action test provided by the embodiment of the present invention may further include: a remote operation module 910, a human-computer interaction module 920 and a grounding module 930,

[0070] The human-machine interaction module 920 is connected to the remote operation module 910 , the voltage regulator 200 , the rectifier 400 , and the grounding module 930 respectively.

[0071] like Figure 6 As shown, in Figure 4 On the basis of the above, the power supply device for simulating the arrester action test provided by the embodiment of the present invention may further include: a remote operation module 910, a human-computer interaction module 920 and a grounding module 930,

[0072] The human-machine interaction module 920 is connected to the remote operation module 910 , the voltage regulator 200 , the rectifier 400 , and the grounding module 930 respectively.

[0073] Optional, such as Figure 7 As shown, the power supply device for simulating the arrester action test provided by the embodiment of the present invention also includes: a housing 1, an uninterruptible power supply system 100 ( Figure 7 Not shown), voltage regulator 200 ( Figure 7 Not shown), isolation transformer 300 ( Figure 7 not shown) and the rectifier 400 ( Figure 7 Not shown) are arranged in the housing.

[0074] The human-machine interaction module 920 may have voltage setting, voltage display, infrared monitoring, and automatic / manual switching functions. When the manual function in the human-machine interaction module 920 is used, the Figure 7The DC / AC switching button 6, voltage divider connection / disconnection button 7, manual boost button 8, and manual buck button 9 are used to manually boost and buck the voltage. When using the automatic function, first set the power supply type to DC or AC in the human-machine interaction module 920, which realizes the corresponding function by controlling the rectifier 400. Subsequently, directly set the voltage value on the user interface of the human-machine interaction module 920. The human-machine interaction module 920 obtains the corresponding test voltage by controlling the voltage regulator 200, and connects the voltage measuring device 810 to the circuit by controlling the time-delay relay 820, and displays the collected voltage on the display interface of the human-machine interaction module 920 in real time. In addition to controlling the operation of the power supply device for the simulated arrester action test, the human-machine interaction module 920 can also monitor the operation status of each module or device in real time. It can monitor the real-time voltage values of the voltage regulator 200, isolation transformer 300, and primary and secondary windings in real time, judge whether there is a fault in boosting or bucking the voltage, and display the status of the time-delay relay 820 to judge whether the voltage measuring device 810 is normally disconnected. When a fault occurs in the power supply device for the simulated arrester action test, the human-machine interaction module 920 will automatically beep and stop running. When the voltage regulator 200 is in the automatic control mode, input the set voltage value in the human-machine interaction module 920. The human-machine interaction module 920 collects the voltage value detected by the voltage measuring device 810, and automatically boosts or bucks the voltage after comparing it with the set value.

[0075] This application uses the human-machine interaction module 920 to read the voltage value in real time, form a negative feedback, and automatically adjust the output voltage of the voltage regulator 200. The two ends of the voltage divider 830 are connected to the circuit through the time-delay relay 820. The voltage divider 830 is connected during the pre-test boosting process and disconnected from the circuit during the test to ensure that the voltage divider 830 is protected from surge overvoltage damage. The voltage divider 830 and the voltage measuring device 810 can be calibrated to meet the requirements of standard metrological traceability.

[0076] The human-machine interaction module 920 can transmit the control information and measurement signals to the remote control module through wireless WIFI via a wireless router. The remote control module has a wireless network card and conducts data transmission and control on the human-machine interaction module 920 through the wireless router. The remote control module precisely controls the human-machine interaction module 920 by configuring dedicated software. This application has the function of remote control, realizing the advantage of being able to be used in a non-test area, greatly improving the integration and intelligence level of the test device, reducing the number of times that test personnel frequently enter and exit the test area, and greatly improving the test safety.

[0077] Optionally, the grounding module 930 includes: a grounding switch and an infrared sensing device. The infrared sensing device is arranged on the panel of the housing (such as Figure 7The four infrared sensing devices 3 shown are respectively arranged at the upper parts of the four side panels of the housing 1. The infrared sensing device is connected to the earthing switch, and the earthing switch is connected to the housing. When the infrared sensing device outputs a signal that meets the requirements, the earthing switch closes to earth the housing. When the infrared sensing device does not output a signal that meets the requirements, the earthing switch opens.

[0078] Optionally, the above infrared sensing device is only one implementation for monitoring the human body. It is also possible to monitor the human body through devices such as cameras and radars. This application does not make any limitations in this regard.

[0079] The above signal that meets the requirements is the signal output when the infrared sensing device senses the presence of a human body within the monitoring range. When a human body appears within the monitoring range, the earthing switch closes, which can ensure that when personnel operate or accidentally touch the housing, the housing is at the earthing potential, protecting the safety of the staff. When no one is detected in the area, the earthing switch is opened to make the housing at the floating potential, protecting the power supply device used for simulating the arrester operation test from overvoltage damage. Optionally, the earthing switch can be installed with an earthing position sensor to display the earthing status of the housing on the human-machine interface. Figure 8 Schematic diagram of the connection between the earthing switch and the housing, as Figure 8 shown, the outer terminal of the bushing 2 passes through the wall is connected to the earthing wire, and the inner terminal realizes the earthing or floating of the housing 1 through the closing or opening of the earthing switch 22. The installation position of the bushing 2 on the housing 1 can refer to Figure 7 . The earthing switch 22 is connected to the housing 1 through the metal support 21, and the metal support 21 realizes the equipotential of the earthing switch 22 and the housing 1. Specifically, when the earthing switch 22 closes, the connection end of the earthing switch 22 extends downward and contacts the connection wire of the inner terminal, thereby realizing the connection from the housing through the metal support 21, the earthing switch 22, the inner terminal, the outer terminal to the earthing wire, and realizing the earthing of the housing. When the earthing switch 22 opens, the connection end of the earthing switch 22 contracts upward, disengages from the connection wire of the inner terminal and maintains a certain distance. An earthing position sensor 23 is also arranged below the earthing switch 22 to monitor the action of the earthing switch 22. The earthing status of the housing 1 can be displayed on the human-machine interface. The earthing switch 22 adopts a linear motion switch, which has the advantages of small volume, light weight, high reliability, etc., can effectively save the internal space and improve the test safety.

[0080] As Figure 7 shown, optionally, an insulating support 10 and a universal wheel 11 are also arranged below the housing. The bottom of the housing is connected through the insulating support and the universal wheel. Specifically, insulating supports 10 are installed at the four corners of the bottom of the housing 1, and the insulating supports 10 ensure the insulation of the housing 1 from the ground; universal wheels 11 are installed at the bottom of the insulating supports 10, and the universal wheels 11 have a self-locking function, which can facilitate safe movement. After moving to the designated position, lock the wheels to ensure safety.

[0081] As Figure 7 shown, optionally, the power supply device for simulating the action test of the lightning arrester provided by the embodiment of the present invention further includes: a man-machine interaction module 920 disposed on the housing, and the man-machine interaction module 920 is respectively connected to the voltage regulator 200, the rectifier 400, and the grounding module 930. A manual control button is also disposed on the housing, and the manual control button includes: an emergency stop button, a DC / AC switching button, a manual boost button, and a manual step-down button.

[0082] Among them, the man-machine interaction module 920 has functions of voltage setting, voltage display, infrared monitoring, and automatic / manual conversion.

[0083] As Figure 7 shown, an emergency stop button 5, a DC / AC switching button 6, a voltage divider access / disconnection button 7, a manual boost button 8, and a manual step-down button 9 are installed on the housing 1.

[0084] Among them, the emergency stop button 5 can forcibly stop the operation of the device; the DC / AC switching button 6 is used to select the input AC voltage or DC voltage; the voltage divider access / disconnection button 7 is used to access or disconnect the voltage divider 830. When the voltage display button of the man-machine interaction module 920 is actively pressed, the time-delay relay 820 closes; after a period of time delay, the time-delay relay 820 disconnects, and the voltage divider 830 is also disconnected from the circuit, protecting the voltage divider 830 and the voltage measuring device 810 from overvoltage damage; the manual boost button 8 is used for manual boosting; the manual step-down button 9 is used for manual step-down.

[0085] Optionally, as Figure 7 shown, one side of the housing 1 is the power input terminal 12 of the uninterruptible power supply system 100, and the other side is the power output terminal 13 (i.e., the other terminal of the protection circuit 600), which is connected by an aviation plug, facilitating plugging and unplugging, and enabling the protection level of the cabinet to reach IP68.

[0086] Preferably, the housing 1 is a front and rear double-opening door, which is convenient for maintenance.

[0087] The grounding switch 22 is fixed on the housing 1 through a metal support 21.

[0088] This application uses infrared monitoring to control the closing and opening of the grounding switch, connects the ground wire through a bushing, and the bottom of the power supply device for simulating the action test of the lightning arrester has an insulating support, ensuring isolation between the housing and the ground during the test process, grounding the device during the approach and use of personnel, and protecting the safety of personnel.

[0089] The embodiment of the present application further provides a system for simulating the operation test of a lightning arrester, including: a voltage transformer 700 and any one of the power supply devices for simulating the operation test of a lightning arrester provided by the embodiment of the present application. The primary side terminal of the voltage transformer 700 is the lightning cut-off voltage input terminal, and the lightning cut-off voltage input to the lightning cut-off voltage input terminal is used to simulate the voltage generated when the lightning arrester operates.

[0090] The secondary side terminal of the voltage transformer 700 is used to supply power to the controller of the automatic reclosing switch, and the housing of the voltage transformer 700 is grounded.

[0091] As Figure 9 shown, the embodiment of the present application further provides a method for simulating the operation test of a lightning arrester, which may include:

[0092] S100. Supply power to the secondary side terminal of the voltage transformer through any one of the power supply devices for simulating the operation test of a lightning arrester provided by the embodiment of the present application, wherein the secondary side terminal of the voltage transformer is connected to the controller of the automatic reclosing switch to supply power to the controller of the automatic reclosing switch, and the housing of the voltage transformer is grounded.

[0093] S200. Input a lightning cut-off voltage to the primary side terminal of the voltage transformer.

[0094] Optionally, the above method may further include:

[0095] When the voltage regulator adjusts the voltage at the output end of the voltage regulator, control the delay relay to be in the closed state and delay to open.

[0096] When the voltage measuring device measures the voltage, control the delay relay to be in the closed state and delay to open.

[0097] Optionally, the above method may further include:

[0098] When the infrared sensing device outputs a signal that meets the requirements, control the earthing switch to close to ground the housing; when the infrared sensing device does not output a signal that meets the requirements, control the earthing switch to open.

[0099] A method for simulating the operation test of a lightning arrester provided by an embodiment of the present invention can supply power to the secondary terminal of a voltage transformer through a power supply device for simulating the operation test of a lightning arrester and input a lightning cut-off voltage to the primary terminal of the voltage transformer. In this way, both the lightning cut-off voltage and the induced voltage induced from the secondary terminal to the primary side exist on the primary terminal of the voltage transformer, which more realistically simulates the voltage at the primary terminal when the lightning arrester is grounded due to being struck by lightning, and further makes the test result of the controller of the automatic reclosing switch more real and reliable in this test scenario. Further, the automatic reclosing switch or other devices can be optimized according to the test results to improve the working performance of the controller of the automatic reclosing switch at this voltage.

[0100] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A power supply device for simulating a lightning arrester action test, characterized in that: include: Uninterruptible power supply systems, voltage regulators, isolation transformers, rectifiers, AC / DC converters and protection circuits, The uninterruptible power supply system has a power input end, the power output end of the uninterruptible power supply system is connected to the input end of the voltage regulator, the output end of the voltage regulator is connected to the input end of the isolation transformer, the output end of the isolation transformer is connected to the input end of the rectifier, the output end of the rectifier is connected to one side terminal of the protection circuit, and the other side terminal of the protection circuit is a connection end for connecting the secondary side terminal of the voltage transformer; One end of the AC / DC conversion switch is connected to the input end of the rectifier, and the other end of the AC / DC conversion switch is connected to the output end of the rectifier; The primary terminal of the voltage transformer is a lightning cutoff voltage input terminal, and the lightning cutoff voltage inputted by the lightning cutoff voltage input terminal is used to simulate the voltage generated when the arrester is in action; The secondary side terminals of the voltage transformer are used to supply power to the controller of the automatic recloser.

2. The power supply device for simulating the arrester action test according to claim 1, characterized in that: Also includes: Voltage measuring devices and time-delay relays, The time delay relay is arranged on the line between the voltage measuring device and the secondary terminal of the voltage transformer, and the time delay relay is in a closed state when the voltage regulator adjusts the voltage at the output end of the voltage regulator, and is disconnected with a time delay; The time delay relay is also in a closed state when the voltage measuring device performs voltage measurement, and is opened with a time delay.

3. The power supply device for simulating the arrester action test according to claim 1, characterized in that: Also includes: Remote operation module, human-computer interaction module and grounding module, The human-computer interaction module is connected to the remote operation module, the voltage regulator, the rectifier and the grounding module respectively.

4. The power supply device for simulating the arrester action test according to claim 1, characterized in that: The protection circuit comprises: a first resistor, a second resistor, a first inductor, a second inductor and a first capacitor; The first end of the first resistor is connected to the first end of the first inductor, the first end of the second resistor is connected to the first end of the second inductor, the first end of the first capacitor is connected to the first end of the first resistor, and the second end of the first capacitor is connected to the first end of the second resistor; The second end of the first inductor is connected to one secondary terminal of the voltage transformer, and the second end of the second inductor is connected to the other secondary terminal of the voltage transformer. The second end of the first resistor and the second end of the second resistor are connected to the output end of the rectifier.

5. The power supply device for simulating the arrester action test according to claim 2, characterized in that: Also includes: A voltage divider, wherein a first input end of the voltage divider is connected to a secondary terminal of the voltage transformer through one of the time delay relays, and a second input end of the voltage divider is connected to another secondary terminal of the voltage transformer through another of the time delay relays. The voltage measuring device is connected to the output terminal of the voltage divider.

6. The power supply device for simulating the arrester action test according to claim 1, characterized in that: Also includes: The uninterruptible power supply system, voltage regulator, isolation transformer and rectifier are all arranged in the housing. The grounding module comprises: a grounding switch and an infrared sensing device, wherein the infrared sensing device is arranged on a panel of the housing, the infrared sensing device is connected to the grounding switch, and the grounding switch is connected to the housing; When the infrared sensing device outputs a signal that meets the requirements, the grounding switch is closed to ground the housing; when the infrared sensing device does not output a signal that meets the requirements, the grounding switch is opened.

7. The power supply device for simulating the arrester action test according to claim 6, characterized in that: An insulating support and a universal wheel are also provided below the shell, and the bottom of the shell is connected through the insulating support and the universal wheel.

8. The power supply device for simulating the arrester action test according to claim 6, characterized in that: Also includes: A human-computer interaction module is arranged on the shell, and the human-computer interaction module is respectively connected to the voltage regulator, the rectifier, and the grounding module. Manual control buttons are also arranged on the shell, and the manual control buttons include: an emergency stop button, a DC / AC switching button, a manual boost button, and a manual step-down button.

9. A system for simulating arrester action test, characterized in that: include: A voltage transformer and a power supply device for simulating a lightning arrester action test as described in any one of claims 1 to 8, wherein the primary terminal of the voltage transformer is a lightning cutoff voltage input terminal, and the lightning cutoff voltage inputted by the lightning cutoff voltage input terminal is used to simulate the voltage generated when the lightning arrester is in action; The secondary side terminal of the voltage transformer is used to supply power to the controller of the automatic recloser, and the housing of the voltage transformer is grounded.

10. A method for simulating a lightning arrester action test, characterized in that: The method comprises: Power is supplied to the secondary terminal of the voltage transformer by a power supply device for simulating the arrester action test according to any one of claims 1 to 8, wherein the secondary terminal of the voltage transformer is connected to the controller of the automatic recloser to supply power to the controller of the automatic recloser, and the housing of the voltage transformer is grounded; A lightning interruption voltage is input to the primary terminal of the voltage transformer.

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