A lightning protection power supply protection box and electrical system

Abstract

The embodiment of the present application discloses a lightning protection power supply protection box and electrical system, which relates to the field of rail transit. It can monitor and track data on lightning intrusion into power cables in real time, reduce the risk of damage to low-voltage sensitive equipment in follow-up step-down substations, realize "condition-based repair" in operation and maintenance, and improve the safety and reliability of subway low-voltage equipment operation. The lightning protection power supply protection box includes a box body, a lightning protection module and a remote sensing monitoring module, wherein the lightning protection module is connected to the power cable and is used to protect the power cable and discharge lightning into the ground; the remote sensing monitoring module, the remote sensing monitoring module and the lightning protection module are arranged in the box body, and the remote sensing monitoring module is electrically connected to the lightning protection module to monitor the lightning current information of the power cable. The lightning protection power supply protection box provided in the embodiment of the present application is used to discharge lightning from the power cable.

Description

Technical Field

[0001] The present application relates to, but is not limited to, the field of rail transportation, and in particular to a lightning protection power supply protection box and an electrical system. Background Art

[0002] The low-voltage control power supply of the following step-down substation (including the power supply of the transformer temperature controller) is generally fed from the AC / DC panel system of the step-down substation and led to the following step-down substation through the outdoor cable trench.

[0003] In conjunction with the lightning protection design of the subway's low-voltage system, primarily referring to GB 50057-2010, "Code for Lightning Protection Design of Buildings," low-voltage surge protectors are installed at the input terminals of the step-down substation's 220 / 380V AC and DC (110V or 220V) panels for lightning protection. However, lightning protection measures are not implemented at the AC and DC input terminals of the step-down substation, where the AC and DC panels feed the power to the follower step-down substation. In actual engineering applications, when lightning strikes the field or in adjacent areas, the resulting lightning electromagnetic pulse can couple to these low-voltage power cables. Due to the lack of protection, this can cause damage to sensitive low-voltage equipment in the follower step-down substation, impacting the safe and reliable operation of the subway's low-voltage equipment.

[0004] To this end, the present application provides a lightning protection power supply protection box and an electrical system. Summary of the Invention

[0005] The embodiment of the present application provides a lightning protection power supply protection box and electrical system, which relates to the field of rail transit. It can monitor and track data on lightning intrusion into power cables in real time, reduce the risk of damage to low-voltage sensitive equipment in follow-up step-down substations, realize "condition-based repair" in operation and maintenance, and improve the safety and reliability of subway low-voltage equipment operation.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0007] In the first aspect, an embodiment of the present application provides a lightning protection power supply protection box, including a box body, a lightning protection module and a remote sensing monitoring module, wherein the lightning protection module is connected to the power cable for protecting the power cable and allowing lightning to discharge into the ground; the remote sensing monitoring module, the remote sensing monitoring module and the lightning protection module are arranged in the box body, and the remote sensing monitoring module is electrically connected to the lightning protection module for monitoring the lightning current information of the power cable.

[0008] The lightning protection power supply protection box provided in the embodiment of the present application has a lightning protection module connected to the power cable for coupling the power cable so that the lightning portion received by the power cable can be discharged into the ground through the lightning protection module, thereby preventing the lightning current from following the power cable and invading the follow-up step-down substation, causing damage to the equipment inside the substation. At the same time, it also avoids damage to the power cable, reducing costs, and a remote sensing monitoring module is also provided in the lightning protection power supply protection box. The remote sensing detection module and the lightning protection module are both integrated inside the box. At the same time, the remote sensing monitoring module is electrically connected to the lightning protection module to monitor the lightning current information of the power cable. , it can track and collect data on lightning intrusion into the power cable and the operation of the lightning protection module in real time, monitor the entire life cycle of the lightning protection module, and provide lightning data information for the optimization and transformation of the project in the later stage. Compared with the related technology, no protective measures are taken for the AC input and DC input terminals of the step-down substation fed from the AC panel or DC panel to the follow-up step-down substation, resulting in the lightning electromagnetic pulse generated when a ground flash occurs being coupled to the power cable. The lightning protection power supply protection box provided by this application is provided with a lightning protection module for the lightning electromagnetic pulse that impacts the power cable, providing it with a discharge channel. That is, the lightning protection power supply protection box provided by this application can monitor and track data on lightning intrusion into the power cable in real time, reduce the risk of damage to low-voltage sensitive equipment in the follow-up step-down substation, realize "status repair" in operation and maintenance, and improve the safety and reliability of the operation of low-voltage equipment in the subway.

[0009] In a possible implementation provided in the present application, the remote sensing monitoring module includes a processing unit, which is used to process lightning current information of the power cable.

[0010] The lightning protection power supply protection box provided in the embodiment of the present application has a remote sensing monitoring module that can monitor the lightning pulses of lightning invading the power cable or the data parameters of the power cable affected by the lightning pulses. A processing unit is set in the remote sensing monitoring module, and the lightning pulses or other parameters of the lightning invading the power cable monitored can be processed by the processing unit and converted into the required data, thereby providing lightning data information for the later optimization and transformation of the project.

[0011] In a possible implementation provided in the present application, the remote sensing monitoring module includes a communication unit, which is electrically connected to the processing unit and is used to transmit the processed lightning current information to the upper server.

[0012] The lightning protection power supply protection box provided in the embodiment of the present application is provided with a communication unit in the remote sensing monitoring module, and the communication unit is electrically connected to the processing unit. The processing unit transmits the processed unit information to the upper server through the communication unit, so that the personnel located on the upper server can monitor the time, number and peak value of lightning intrusion into the power cable, so that the personnel on the upper server can make instructions according to the real-time situation.

[0013] In a possible implementation provided in the present application, the remote sensing monitoring module includes a display unit, which is electrically connected to the processing unit and is used to display processed information.

[0014] The lightning protection power supply protection box provided in the embodiment of the present application is provided with a display unit in the remote sensing monitoring module, and the display unit is electrically connected to the processing unit, so that on-site operation and maintenance personnel can directly observe the information after power cable processing through the display unit, and facilitate the operation and maintenance personnel to make real-time adjustments.

[0015] In a possible implementation provided in the present application, the display unit includes a touch screen, and the touch screen is arranged outside the box.

[0016] The lightning protection power supply protection box provided in the embodiment of the present application is provided with a touch screen on the outside of the box, which allows operation and maintenance personnel to observe the time, number and peak value of lightning intrusion in real time without opening the lightning protection power supply protection box, thereby improving the operational safety factor of the operation and maintenance personnel.

[0017] In a possible implementation provided in the present application, a DC input line and an AC input line are provided between the power cable and the lightning protection module, with two DC input lines and one AC input line.

[0018] The lightning protection power supply protection box provided in the embodiment of the present application is provided with a DC incoming line and an AC incoming line between the power cable and the lightning protection module, realizing the power distribution function of the lightning protection power supply protection box, and one AC incoming line can provide multiple AC feeders, and two DC incoming lines work together to provide multiple DC feeders, ensuring that the DC incoming line is uninterrupted and realizing backup of the input end, and the two DC incoming lines themselves can also be connected in parallel to facilitate the normal operation of the lightning protection power supply protection box.

[0019] In a possible implementation provided in the present application, a plurality of branch incoming lines are provided corresponding to the DC incoming line and the AC incoming line.

[0020] The lightning protection power supply protection box provided in the embodiment of the present application has multiple branch lines corresponding to the DC line and the AC line, which are provided for special needs in engineering applications, such as system expansion, and a type of electrical components can also be connected to a corresponding branch line, which facilitates the classified management of the lightning protection power supply protection box.

[0021] In a possible implementation provided in the present application, the lightning protection module includes a switching power supply and a surge protector. The switching power supply is connected to the surge protector and the power cable through a DC input line and an AC input line to protect the power cable from lightning.

[0022] The lightning protection power supply protection box provided in the embodiment of the present application has many advantages, such as the surge protector has a quick response time, large absorption and discharge capacity; at the same time, it uses the latest arc extinguishing technology to avoid the occurrence of fire; the temperature control ability protects the circuit and a protection mechanism is set up internally; it carries a power status indicator light to clearly indicate its working status; the structure can be effective and rigorous, and the operation is stable. Therefore, the lightning protection module selects the method of using a surge protector for lightning protection, and sets a switching power supply and a surge protector. The surge protector, the switching power supply and the power cable are connected through a DC incoming line and an AC incoming line to protect the power cable from lightning.

[0023] In a possible implementation provided in the present application, a fixing member is provided on the outside of the box body for fixing the box body at a target position.

[0024] The lightning protection power supply protection box provided in the embodiment of the present application has fixing parts set on the outside of the box to fix the box in the target position. It adopts a wall-mounted installation method, and the power cable enters and exits from the bottom. There is no need to change the internal layout of the existing cabinet, which is conducive to the later installation and setting of the lightning protection power supply protection box.

[0025] In the second aspect, an embodiment of the present application provides an electrical system, including a step-down substation end, a following step-down substation end, and a power cable. The power cable is connected to the step-down substation end and the following step-down substation end, and the lightning protection power supply protection box provided in the embodiment of the first aspect. The lightning protection power supply protection box is arranged on the power cable to protect the power cable and allow lightning to discharge into the ground.

[0026] The present embodiment provides an electrical system that, because it includes the lightning protection power supply protection box provided by any of the embodiments of the first aspect, achieves the same technical effects. Specifically, it can monitor and track data on lightning intrusion into power cables in real time, reducing the risk of damage to sensitive low-voltage equipment in follower-type step-down substations, enabling "condition-based maintenance" operations, and improving the safety and reliability of subway low-voltage equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A front view of a lightning protection power supply protection box provided in an embodiment of the present application;

[0028] Figure 2 Schematic diagram of the lightning protection power supply box provided in the embodiment of the present application;

[0029] Figure 3 A schematic diagram showing the distribution of electrical components inside a lightning protection power supply protection box according to an embodiment of the present application;

[0030] Figure 4 This is a schematic diagram of the BB cross-section inside the lightning protection power supply protection box provided in an embodiment of the present application.

[0031] Reference numerals

[0032] 1- Cabinet; 11- Fixings; 2- Lightning protection module; 21- Switching power supply; 22- DC surge protector; 23- AC surge protector; 24- DC surge-dedicated backup protector; 25- AC surge-dedicated backup protector; 3- Remote sensing monitoring module; 31- Touch screen; 4- DC incoming line; 41- DC branch incoming line; 5- AC incoming line; 51- AC branch incoming line; 6- DC copper busbar; 7- AC copper busbar; 8- Circuit breaker; 9- Wiring terminals. DETAILED DESCRIPTION

[0033] It should be noted that, unless there is a conflict, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed description in the specific implementation method should be understood as an explanation of the purpose of this application and should not be regarded as an improper restriction on this application.

[0034] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the specific technical solutions of the present application will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application but are not intended to limit the scope of the present application.

[0035] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of this application, unless otherwise specified, "multiple" means two or more.

[0036] In addition, in the embodiments of the present application, directional terms such as "up", "down", "left" and "right" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to changes in the orientation of the components in the drawings.

[0037] In the embodiments of the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integrated connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0038] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0039] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0040] Electricity is a high-quality energy source, and the urban rail transit (subway) power supply system is an important user in the urban power grid. The power supply system is a system that provides electricity for subway operations. On the one hand, it provides traction power for electric passenger cars, and on the other hand, it also provides electricity for other auxiliary facilities serving the operation, including lighting, ventilation, air conditioning, water supply and drainage systems, communications, signals, disaster prevention alarms, escalators, platform shield door systems and other important equipment.

[0041] The subway power supply system is mainly composed of switching stations, traction substations, step-down substations, follow-up step-down substations and other power stations. At present, some subways combine traction substations and step-down substations into one, forming a traction-step-down hybrid substation, referred to as a traction-mixed substation, to optimize the subway power supply structure. Combining the traction substation and the step-down substation into one not only improves the functional integration, but also reduces construction and maintenance costs.

[0042] Among them, the switchgear supplies 35KV three-phase AC power from the mains to the traction power supply system and the transformer substation through a 35KV ring network. In simple terms, it is an oversized switch. When it is open, it continuously obtains power from the mains to meet the power needs of various subway operations. When it is closed, it disconnects from the mains to meet the needs of subway inspection and maintenance. It can be seen that the switchgear does not assume the function of traction voltage reduction; the traction substation is a substation whose main function is to supply power to the DC traction system. In simple terms, it converts 35KV three-phase AC power into 1500V DC power through a rectifier transformer and a rectifier to supply power to the contact rail, and then introduces 1500V DC power into the train through the train's collector shoe to meet the train traction and train auxiliary The power demand of the equipment; the step-down substation is a substation that provides AC power to important equipment such as lighting, ventilation, air conditioning, water supply and drainage systems, communications, and signal lights at the station; the traction step-down hybrid substation combines traction and step-down functions, providing traction power for trains on the one hand and various power needs for the station and equipment on the other; the follow-up step-down substation: divided into station follow-up step-down substations and interval follow-up step-down substations, these substations use power cables to convert 35kV three-phase AC power from traction substations or step-down substations, and then step down the power to low-voltage three-phase AC power through a power transformer to power AC380 / 220V equipment such as lighting and power. The follow-up step-down substation is located far away from the power load or is located at another load center, making it less economical to directly use low-voltage cables for power supply. A step-down substation built at another load center, which indirectly draws high voltage power from the high-voltage cabinet of the step-down substation, is called a branch step-down substation or a follower step-down substation.

[0043] The low-voltage control power supply of the follower step-down substation (including the power supply of the transformer temperature controller) is fed from the AC / DC panel system of the step-down substation and led to the follower step-down substation through an outdoor cable trench. To this end, an embodiment of the present application provides an electrical system, including a traction end connected to the step-down substation from a power cable and a follower end connected to the follower step-down substation, and a lightning protection power supply protection box provided by an embodiment of the present application is connected to the end of the cable, which is used to couple the power cable so that lightning can flow into the ground, monitor and track the data of lightning intrusion into the power cable in real time, reduce the risk of damage to low-voltage sensitive equipment in the follower step-down substation, and improve the safety and reliability of the operation of low-voltage equipment in the subway.

[0044] Reference Figure 1 and Figure 2An embodiment of the present application provides a lightning protection power supply protection box, including a box body 1, a lightning protection module 2 and a remote sensing monitoring module 3, wherein the lightning protection module 2 is connected to the power cable and is used to protect the power cable and discharge lightning into the ground; the remote sensing monitoring module 3, the remote sensing monitoring module 3 and the lightning protection module 2 are arranged in the box body 1, and the remote sensing monitoring module 3 is electrically connected to the lightning protection module 2 and is used to monitor the lightning current information of the power cable.

[0045] The lightning protection power supply protection box provided by the embodiment of the present application has a lightning protection module 2 connected to the power cable for protecting the power cable, so that the lightning part received by the power cable can be discharged into the ground through the lightning protection module 2, thereby preventing the lightning current from following the cable to invade the follow-up step-down substation, causing damage to the equipment inside the substation, and also preventing damage to the power cable, thereby reducing costs. In addition, a remote sensing monitoring module 3 is also provided in the lightning protection power supply protection box, and the remote sensing detection module 3 and the lightning protection module 2 are arranged inside the box body 1. At the same time, the remote sensing monitoring module 3 is electrically connected to the lightning protection module 2 for monitoring the lightning current information of the power cable. The device can track and collect data on lightning intrusion into the power cable and the operation of the lightning protection module 2 in real time, monitor the entire life cycle of the lightning protection module 2, and provide lightning data information for the later optimization and transformation of the project. Compared with the related technology, no protective measures are taken for the AC input and DC input terminals of the step-down substation fed from the AC panel or DC panel to the follow-up step-down substation, resulting in the lightning electromagnetic pulse generated when a ground flash occurs being coupled to the power cable. The lightning protection power supply protection box provided by the application is provided with a lightning protection module 2 for the lightning electromagnetic pulse that impacts the power cable, providing a discharge channel for it. That is, the lightning protection power supply protection box provided by the application can monitor and track data on lightning intrusion into the cable in real time, reduce the risk of damage to low-voltage sensitive equipment in the follow-up step-down substation, realize "status repair" of operation and maintenance, and improve the safety and reliability of the operation of low-voltage equipment in the subway.

[0046] like Figure 1 and Figure 2 As shown, the remote sensing monitoring module 3 can monitor the lightning pulses of the power supply lightning invading the power cable or the data parameters of the power cable affected by the lightning pulses. A processing unit is set in the remote sensing monitoring module 3, and the lightning pulses or other parameters of the lightning invading the power cable monitored can be converted into the required data through the processing unit, providing lightning data information for the later optimization and transformation of the project.

[0047] Furthermore, a communication unit is provided within remote sensing monitoring module 3, electrically connected to the processing unit. The processing unit transmits processed unit information to the upper server via the communication unit, enabling personnel at the upper server to monitor the timing, frequency, and peak value of lightning strikes on the power cable, facilitating the upper server's ability to issue instructions based on real-time conditions. It should be noted that the communication unit may also include an RS485 communication port to support unmanned big data systems in the future.

[0048] Furthermore, a display unit is provided in the remote sensing monitoring module 3, and the display unit is electrically connected to the processing unit, so that on-site operation and maintenance personnel can directly observe the information after power cable processing through the display unit, and facilitate real-time adjustment by the operation and maintenance personnel.

[0049] Specifically, a touch screen 31 is set on the outside of the box 1, which allows operation and maintenance personnel to observe the time, number and peak value of lightning intrusion in real time without opening the lightning protection power supply protection box, thereby improving the operation safety factor of the operation and maintenance personnel. The touch screen 31 can use configuration software to store and analyze the data of the built-in processing unit, and configure multiple personal interfaces such as the system main interface, alarm interface and history interface, which is convenient for on-site operation and maintenance personnel to query data.

[0050] In some embodiments provided in this application, Figure 1 and Figure 2 As shown, a DC line 4 and an AC line 5 are provided between the power cable and the lightning protection module 2. There are two DC lines 4 and one AC line 5. The provision of DC lines 4 and AC lines 5 between the power cable and the lightning protection module 2 implements the power distribution function of the lightning protection power supply protection box. One AC line 5 can provide multiple AC feeders, while two DC lines 4 work together to provide multiple DC feeders, ensuring uninterrupted power to the DC line 4 and providing backup for the input end. Furthermore, the two DC lines 4 can be connected in parallel, facilitating the normal operation of the lightning protection power supply protection box.

[0051] It should be noted that a plurality of branch lines are provided corresponding to the DC incoming line 4 and the AC incoming line 5, namely, the DC branch incoming line 41 and the AC branch incoming line 51. If two DC incoming lines 4 and one AC incoming line 5 meet the needs, the DC branch incoming line 41 and the AC branch incoming line 51 are in a disconnected state. If the system is expanded or other electrical components are added to the subway track and need to be provided with power, the DC branch incoming line 41 or the AC branch incoming line 51 can be connected. This setting facilitates the operator's classified management of the lightning protection power supply protection box.

[0052] For example, during the operation of rail transit, there are various ways to protect against lightning. The surge protector has a quick response time and a large absorption and discharge capacity; at the same time, it uses the latest arc extinguishing technology to avoid the occurrence of fire; the temperature control ability protects the circuit and sets a protection mechanism internally; it carries a power status indicator light to clearly show its working status; the structure can be effective and rigorous, and the operation is stable, etc. Therefore, the lightning protection module 2 selects the method of using a surge protector for lightning protection, and sets a switching power supply 21 and a surge protector. The surge protector, the switching power supply 21 and the power cable are connected through a DC input line 4 and an AC input line 5 to protect the power cable from lightning.

[0053] It should be noted that the lightning protection module 2 is provided with two DC input lines 4 and one AC input line 5. The surge protector is used to protect the power cable from lightning. Therefore, the number of surge protectors can be set to one, which is set on the common line of the DC input line 4 and the AC input line 5, or they can be set separately, with a DC surge protector 22 set on the DC input line 4 and an AC surge protector 23 set on the AC input line 5. There are two DC input lines 4. Similarly, there can be one DC surge protector 22, which is set on the common line where the two DC input lines 4 intersect, or two DC surge protectors 22 can be set, which are set correspondingly on the two DC input lines 4.

[0054] It should be noted that in lightning protection projects, surge protectors are usually used together with circuit breakers, such as fuses or air switches. However, current fuses often cannot be coordinated with surge protectors. When the power supply is abnormal or the surge protector fails, the power cable will be struck by lightning or even cause a fire. Therefore, a surge-specific backup protector is installed at the corresponding surge protector to protect the surge protector and maintain the line safety of the power cable. If the circuit is damaged or the circuit breaker refuses to operate during operation, the surge-specific backup protector will work to eliminate the hidden dangers and achieve the function of quick disconnection of small currents at the industrial frequency and no tripping of large current lightning impacts.

[0055] Specifically, a DC surge protector 22 and an AC surge protector 23 are provided in the lightning protection module 2. Correspondingly, a DC surge-specific backup protector 24 is connected in series at the corresponding position of the DC surge protector 22, and an AC surge-specific backup protector 25 is connected in series at the corresponding position of the AC surge protector 23. The position of the surge-specific backup protector is determined according to the position of the surge protector.

[0056] In some other embodiments provided in this application, refer to Figure 1 and Figure 2 A fixing member 11 is provided on the outside of the box body 1 for fixing the box body 1 at a target position.

[0057] The lightning protection power supply protection box provided in the embodiment of the present application has a fixing part 11 set on the outside of the box body 1 to fix the box body 1 at the target position. The wall-mounted installation method is adopted, and the power cable enters and exits from the bottom. There is no need to change the internal layout of the existing cabinet, which is conducive to the later installation and setting of the lightning protection power supply protection box.

[0058] It should be noted that Figure 3 and Figure 4 This is a schematic diagram of the internal electrical component distribution of the lightning protection power supply box. The power cable enters from the bottom of the box 1 and is connected to the terminal 9. The terminal 9 is connected to the DC terminal 6 or AC terminal 7 through the circuit breaker 8 and is connected to the lightning protection module. It is used to protect the power cable from lightning and allow lightning to flow into the ground.

[0059] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A lightning protection power supply protection box, characterized in that: include: Box; a lightning protection module, connected to the power cable, for protecting the power cable and discharging lightning into the ground; A remote sensing monitoring module, wherein the remote sensing monitoring module and the lightning protection module are arranged in the box, and the remote sensing monitoring module is electrically connected to the lightning protection module and is used to monitor lightning current information of the power cable; A DC input line and an AC input line are provided between the power cable and the lightning protection module, wherein the DC input lines are two and the AC input line is one; The DC incoming line and the AC incoming line are provided with a plurality of branch incoming lines corresponding to each other; the plurality of branch incoming lines respectively include a DC branch incoming line and an AC branch incoming line; The lightning protection module includes a switching power supply and a surge protector. The switching power supply is connected to the surge protector and the power cable through the DC input line and the AC input line to protect the power cable from lightning. 2 . The lightning protection power supply protection box according to claim 1 , wherein the remote sensing monitoring module comprises a processing unit configured to process the lightning current information of the power cable.

3. The lightning protection power supply protection box according to claim 2, wherein the remote sensing monitoring module includes a communication unit, which is electrically connected to the processing unit and is used to transmit the processed lightning current information to an upper server. 4 . The lightning protection power supply protection box according to claim 2 , wherein the remote sensing monitoring module comprises a display unit, and the display unit is electrically connected to the processing unit and is used to display the processed lightning current information. 5 . The lightning protection power supply protection box according to claim 4 , wherein the display unit comprises a touch screen, and the touch screen is arranged outside the box.

6. The lightning protection power supply protection box according to claim 1, wherein a fixing piece is provided on the outside of the box body for fixing the box body at a target position.

7. An electrical system, characterized in that: include: Step-down substation end; Follower step-down substation end; A power cable connected to the step-down substation end and the follower step-down substation end; The lightning protection power supply protection box according to any one of claims 1 to 6 is provided on the power cable to protect the power cable and discharge lightning into the ground.

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