Power distribution network medium and low voltage cooperative control system based on IEC international standard

Abstract

The invention discloses a low-voltage cooperative control system in a power distribution network based on an IEC international standard, and particularly relates to the technical field of low-voltage control. Comprising a standard formulation module, a security data acquisition monitoring module, a security data processing analysis module, a security state assessment early warning module, a security cooperative control module, a security assessment optimization module and a security automatic upgrade module. By adopting the standard formulating module, the low-voltage cooperative control system has the advantages that data subjected to encryption cooperative processing are transmitted to the position of the safety state assessment early warning module, safety cooperative processing of low-voltage cooperative control data can be realized, and high safety of cooperative control is realized, so that the problem that the low-voltage cooperative control system is not high in reliability due to more system control data in the low-voltage cooperative control process is solved. And the switching control safety is difficult to guarantee, so that a safety control problem is very easy to occur in a low-voltage cooperative control process, and the safety of cooperative control is influenced.

Description

Technical Field

[0001] The present invention relates to the field of low voltage control technology, and more specifically, to a low voltage coordinated control system in a distribution network based on IEC international standards. Background Art

[0002] The low-voltage coordinated control system in the international standard distribution network has multiple uses, mainly in improving energy utilization efficiency and reducing the conversion links. The application of low-voltage DC power distribution technology can reduce the conversion links between DC sources and loads, thereby improving energy utilization efficiency and optimizing voltage and power quality. By following the IEC international standard, the voltage and power quality of the low-voltage DC system can be optimized, thereby further improving energy utilization efficiency.

[0003] In the existing public documents, the patent announcement number CN118367563A discloses a low-voltage power coordinated control system for the power distribution network. The system reduces the energy loss caused by the flow of reactive power during the power supply process by understanding the reactive compensation requirements of the power supply paths of each target power supply end in real time and performing corresponding reactive compensation processing. After the power supply to the target area is completed in the set time period of the day, the power supply quality of the target area in the set time period of the day is evaluated based on the reactive compensation benefit coefficient and the active matching benefit coefficient, realizing the closed loop of power supply dispatching management optimization, thereby promoting the power grid to develop in a more efficient, smarter and more environmentally friendly direction. However, the system still has the following problems.

[0004] Although the low-voltage collaborative control system of the international standard can realize low-voltage collaborative control during use, the safety of switching control is difficult to guarantee due to the large amount of system control data during the low-voltage collaborative control process. This leads to safety control problems that are very likely to occur during the low-voltage collaborative control process, affecting the safety of the collaborative control. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides the following technical solutions: a low voltage collaborative control system for a distribution network based on the IEC international standard, comprising a standard setting module, a safety data acquisition and monitoring module and a safety data processing and analysis module, wherein the safety data acquisition and monitoring module is communicatively connected to the output end of the standard setting module, and the safety data processing and analysis module is docked to the output end of the safety data acquisition and monitoring module through a data line; the output end of the safety data processing and analysis module is communicatively connected to a safety status assessment and early warning module, the docking end of the safety status assessment and early warning module is connected to a safety collaborative control module, and the output end of the safety collaborative control module is connected to a safety assessment optimization module; the wireless end of the safety assessment optimization module is docked to a safety automatic upgrade module.

[0006] Preferably, the standard-setting module and the safety data acquisition and monitoring module are connected by a 5G network wireless router, and the number of 5G network wireless routers is set to two. The standard-setting module includes a communication data verifier, an operation data standard verifier and a low-voltage collaborative standard operation host, and the output end of the communication data verifier is fixedly connected to the input end of the operation data standard verifier, and the output end of the operation data standard verifier is fixedly connected to the input end of the low-voltage collaborative standard operation host. The output order of the communication data verifier, the operation data standard verifier and the low-voltage collaborative standard operation host is arranged in sequence from front to back, and the communication data verifier and the low-voltage collaborative standard operation host are symmetrically connected about the operation data standard verifier.

[0007] When this technology is in use, the standard formulation module mainly implements standard data verification through the communication data verifier, and the operation data standard verifier enables the operation data standard to be verified and formulated, and the low-voltage collaborative standard operation host can operate under the low-voltage collaborative protocol standard. Current safety detection is performed by the current safety detector, voltage safety detection is performed by the voltage safety detector, temperature safety detection is performed by the temperature safety detector, and data verification detection is performed by the data verification detector. After data verification, it is transmitted to the security data processing and analysis module for security data analysis and processing, and the encryption processing host continues to perform encryption processing. The encrypted and collaboratively processed data is transmitted to the location of the security status assessment and early warning module.

[0008] Preferably, the safety data acquisition and monitoring module includes a current safety detector, a voltage safety detector, a temperature safety detector, a low voltage calibration detector and a data verification detector; The input end of the voltage safety detector is connected to the current safety detector, and the output end of the voltage safety detector is connected to the temperature safety detector. The low-voltage proofreading detector is fixed on the output end of the temperature safety detector, and the data verification detector is connected to the output end of the low-voltage proofreading detector; the detection sequence of the current safety detector, voltage safety detector, temperature safety detector, low-voltage proofreading detector and data verification detector is detected and operated in sequence from front to back. The safety data processing and analysis module includes an encryption analysis host, an encryption processing host and a safety rating host; the encryption analysis host is fixed on the input end of the encryption processing host, and the safety rating host is fixed on the output end of the encryption processing host. The safety status assessment and early warning module includes an encryption assessment host and a safety status display as well as a safety early warning host and a remote early warning light; the encryption assessment host is fixed on the input end of the safety status display, and the safety early warning host is fixed on the output end of the safety status display, and the remote early warning light is welded on one side of the safety early warning host. The safety collaborative control module includes a low-voltage branch switching switch and a current operation collaborative switching switch as well as a voltage collaborative operation switching switch and an encryption collaborative operation control host; The low-voltage branch switching switch is fixed on the input end of the current operation cooperative switching switch, and the voltage cooperative operation switching switch is fixed on the output end of the current operation cooperative switching switch. The encrypted cooperative operation control host is connected to the communication end of the voltage cooperative operation switching switch, and the encrypted cooperative operation control host is displayed to be connected to a control display.

[0009] When this technology is in use, the security status assessment and early warning module will be re-encrypted and evaluated by the encryption assessment host to ensure that the encrypted data is at a higher security level. After being processed by the security early warning host, the remote early warning light will realize the early warning processing. If the risk is high, a red light will be displayed, and if the risk is low, a green light will be displayed. The evaluated data will be collaboratively controlled by the security collaborative control module, which mainly includes the low-voltage branch switching switch for low-voltage branch switching, and the current operation collaborative switching switch can realize the current operation collaborative switching, and the voltage collaborative operation switching can be realized through the voltage collaborative operation switching switch.

[0010] Preferably, the security assessment optimization module includes an optimization docking device and an encryption assessment machine, the output end of the optimization docking device is communicatively connected to a security encryption assessment instrument, and the security encryption assessment instrument and the encryption assessment machine are communicatively connected; the output end of the security encryption assessment instrument is fixedly connected to an information storage assessment device. The output end of the standard setting module is fixedly connected to a security password control switch and a security update instrument, and the security update instrument is fixed on the output end of the security password control switch, and the output end of the security update instrument is connected to upgrade storage 1 and upgrade storage 2.

[0011] When this technology is used, the data is evaluated and optimized through the security evaluation optimization module, the encryption evaluation machine realizes encryption evaluation optimization processing, the information storage evaluator processes and runs after information evaluation, and then is processed by the security evaluation optimization module and sent to the security automatic upgrade module to realize security automatic upgrade processing. At the same time, the security automatic upgrade module realizes the security password control switching processing of the security password control switch, and the coordinated control data can be stored in the upgrade storage 1, and the upgrade storage 2 will be backed up and stored again.

[0012] Technical effects and advantages of the present invention: The present invention adopts a standard formulation module, which mainly realizes standard data verification through a communication data verifier, and an operating data standard verifier enables the operating data standard to be verified and formulated, while the low-voltage collaborative standard operating host can operate under the low-voltage collaborative protocol standard, mainly through a current safety detector for current safety detection, and a voltage safety detector for voltage safety detection. The low-voltage proofreading detector can perform proofreading detection under a low-voltage state, and after data verification, it is transmitted to the security data processing and analysis module for security data analysis and processing, and the security rating host implements security rating processing. The encrypted and collaboratively processed data is transmitted to the security status assessment and early warning module position, so that the low-voltage collaborative control data can be safely collaboratively processed, so that the security control can be greatly improved in the low-voltage collaborative control process, and the high security of collaborative control can be achieved.

[0013] The present invention adopts a safety status assessment and early warning module to perform re-encryption assessment processing through an encrypted assessment host, displays the safety status through a safety status display, and implements safety early warning processing for data with lower security levels by the safety early warning host. After processing by the safety early warning host, early warning processing is implemented by a remote early warning light. The evaluated data is collaboratively controlled by a safety collaborative control module, and a current operation collaborative switching switch can realize current operation collaborative switching. Encrypted operation processing is implemented by the encrypted collaborative operation control host to realize operation processing operations.

[0014] 3. The present invention utilizes the data to achieve evaluation optimization through a security evaluation optimization module, in which the optimization docking is mainly performed through an optimization docking device. After the encryption evaluation machine and the optimization docking device realize encryption and optimization processing, the data is processed by a security encryption evaluation instrument, and the information storage evaluator performs information evaluation and processing. After being processed by the security evaluation optimization module, the data is transmitted to the security automatic upgrade module to realize security automatic upgrade processing. The security password control switch realizes security update processing through a security update instrument, realizes two-level security encryption storage, and realizes double automatic optimization processing of collaboratively controlled data, thereby greatly improving processing security. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the operation of the low voltage coordinated control system of the distribution network based on the IEC international standard of the present invention.

[0016] Figure 2 This is a schematic diagram of the operation of the standard formulation module of the present invention.

[0017] Figure 3 This is a schematic diagram of the operation of the safety data acquisition and monitoring module of the present invention.

[0018] Figure 4 This is a schematic diagram of the operation of the security data processing and analysis module of the present invention.

[0019] Figure 5 This is a schematic diagram of the operation of the safety status assessment and early warning module of the present invention.

[0020] Figure 6 This is a schematic diagram of the operation of the safety collaborative control module of the present invention.

[0021] Figure 7 This is a schematic diagram of the operation of the security assessment optimization module of the present invention.

[0022] Figure 8 This is a schematic diagram of the operation of the safe automatic upgrade module of the present invention.

[0023] The accompanying drawings are marked as follows: 1. Standard formulation module; 2. Safety data acquisition and monitoring module; 3. Safety data processing and analysis module; 4. Safety status assessment and early warning module; 5. Safety collaborative control module; 6. Safety assessment and optimization module; 7. Safety automatic upgrade module; 8. Communication data verifier; 9. Operation data standard verifier; 10. Low-voltage collaborative standard operation host; 11. Current safety detector; 12. Voltage safety detector; 13. Temperature safety detector; 14. Low-voltage proofreading detector; 15. Data verification detector; 16. Encryption analysis host; 17. Encryption processing host 1. Safety rating host; 2. Encryption assessment host; 3. Safety status display; 4. Safety warning host; 5. Remote warning light; 6. Low voltage branch switch; 7. Current operation coordination switch; 8. Voltage coordination switch; 9. Encryption coordination control host; 10. Control display; 11. Optimization docking device; 12. Encryption assessment machine; 13. Security encryption assessor; 14. Information storage assessor; 15. Security password control switch; 16. Security updater; 17. Upgrade storage 18. Upgrade storage 29. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] As attached Figure 1-8 The low-voltage coordinated control system for the distribution network based on the IEC international standard shown in the figure includes a standard-setting module 1, a safety data acquisition and monitoring module 2, and a safety data processing and analysis module 3. The safety data acquisition and monitoring module 2 is communicatively connected to the output end of the standard-setting module 1, and the safety data processing and analysis module 3 is connected to the output end of the safety data acquisition and monitoring module 2 through a data line; the output end of the safety data processing and analysis module 3 is communicatively connected to a safety state assessment and early warning module 4, the docking end of the safety state assessment and early warning module 4 is connected to a safety coordinated control module 5, and the output end of the safety coordinated control module 5 is connected to a safety assessment optimization module 6; the wireless end of the safety assessment optimization module 6 is connected to a safety automatic upgrade module 7. The standard-setting module 1 and the safety data acquisition and monitoring module 2 are connected by a 5G network wireless router, and the number of 5G network wireless routers is set to two.

[0026] In this technical solution, as shown in the attached Figure 2-4 As shown, the standard formulation module 1 includes a communication data checker 8, an operation data standard checker 9, and a low-voltage collaborative standard operation host 10, and the output end of the communication data checker 8 is fixedly connected to the input end of the operation data standard checker 9, and the output end of the operation data standard checker 9 is fixedly connected to the input end of the low-voltage collaborative standard operation host 10. The output sequence of the communication data checker 8, the operation data standard checker 9, and the low-voltage collaborative standard operation host 10 is arranged from front to back, and the communication data checker 8 and the low-voltage collaborative standard operation host 10 are symmetrically connected with respect to the operation data standard checker 9. The safety data acquisition monitoring module 2 includes a current safety detector 11, a voltage safety detector 12, a temperature safety detector 13, a low voltage proofreading detector 14 and a data verification detector 15; the input end of the voltage safety detector 12 is connected to the current safety detector 11, and the output end of the voltage safety detector 12 is connected to the temperature safety detector 13, the low voltage proofreading detector 14 is fixed on the output end of the temperature safety detector 13, and the data verification detector 15 is connected to the output end of the low voltage proofreading detector 14; the detection order of the current safety detector 11, the voltage safety detector 12, the temperature safety detector 13, the low voltage proofreading detector 14 and the data verification detector 15 is detected and run in sequence from front to back.

[0027] The security data processing and analysis module 3 includes an encryption analysis host 16 , an encryption processing host 17 and a security rating host 18 ; the encryption analysis host 16 is fixed on the input end of the encryption processing host 17 , while the security rating host 18 is fixed on the output end of the encryption processing host 17 .

[0028] In this technical solution, as shown in the attached Figure 5-6 As shown, the safety status assessment and warning module 4 includes an encryption assessment host 19, a safety status display 20, a safety warning host 21, and a remote warning light 22; the encryption assessment host 19 is fixed on the input end of the safety status display 20, and the safety warning host 21 is fixed on the output end of the safety status display 20, and the remote warning light 22 is welded on one side of the safety warning host 21. The safety collaborative control module 5 includes a low-voltage branch switch 23, a current operation collaborative switch 24, a voltage collaborative operation switch 25, and an encryption collaborative operation control host 26; the low-voltage branch switch 23 is fixed on the input end of the current operation collaborative switch 24, and the voltage collaborative operation switch 25 is fixed on the output end of the current operation collaborative switch 24, the encryption collaborative operation control host 26 is connected to the communication end of the voltage collaborative operation switch 25, and the encryption collaborative operation control host 26 is connected to the control display 27.

[0029] In this technical solution, as shown in the attached Figure 7-8 As shown, the security assessment optimization module 6 includes an optimization docking device 28 and an encryption assessment machine 29. The output end of the optimization docking device 28 is communicatively connected to a security encryption assessment device 30, and the security encryption assessment device 30 is communicatively connected to the encryption assessment machine 29; the output end of the security encryption assessment device 30 is fixedly connected to an information storage assessment device 31. The output end of the standard formulation module 1 is fixedly connected with a security password control switch 32 and a security updater 33, and the security updater 33 is fixed on the output end of the security password control switch 32. The output end of the security updater 33 is connected with an upgrade storage 1 34 and an upgrade storage 2 35, so that the data can be evaluated and optimized through the security evaluation optimization module 6, the encryption evaluation machine 29 implements encryption evaluation optimization processing, and the security encryption evaluation processing is carried out by the security encryption evaluation instrument 30. The information storage evaluator 31 performs information evaluation and processing, and then the security evaluation optimization module 6 processes and transmits it to the security automatic upgrade module 7 to implement security automatic upgrade processing, the security password control switching processing of the security password control switch 32, and the security updater 33 implements security update processing. For the collaborative control data, the upgrade storage 1 34 can be operated and stored, and the upgrade storage 2 35 will be backed up and stored again.

[0030] The working principle of the low-voltage coordinated control system of the distribution network based on the IEC international standard of the present invention is as follows: Step 1: During safety processing, the standard setting module 1 is specified according to the standard, wherein the standard setting module 1 mainly realizes standard data verification through the communication data verifier 8, and the operation data standard is verified and formulated through the operation data standard verifier 9, and the low-voltage collaborative standard operation host 10 can operate under the low-voltage collaborative protocol standard. After being formulated by the standard setting module 1, the safety data acquisition and monitoring module 2 is used to realize safety data acquisition and monitoring, wherein the current safety detection is mainly carried out by the current safety detector 11, the voltage safety detection is carried out by the voltage safety detector 12, the temperature safety detection is carried out by the temperature safety detector 13, the low-voltage proofreading detector 14 can perform proofreading detection under low voltage, and the data verification detector 15 performs data verification detection. After data verification, it is then transmitted to the safety data processing and analysis module 3 for safety data analysis and processing, and then the encryption analysis host 16 is used for encryption analysis, and then the encryption processing host 17 continues to perform encryption processing, and the safety rating host 18 realizes safety rating processing, and the data after encryption and collaborative processing is transmitted to the safety status assessment and early warning module 4.

[0031] Step 2: During the collaborative control of safety assessment, the safety status assessment and early warning module 4 is subjected to a re-encryption assessment process through the encryption assessment host 19, and the safety status is displayed through the safety status display 20 to ensure that the encrypted data is at a higher security level. For data with a lower security level, the safety early warning host 21 implements safety early warning processing, and after being processed by the safety early warning host 21, the remote early warning light 22 implements early warning processing, and the wind direction status is remotely prompted through the safety early warning host 21. If the risk is high, a red light will be displayed, and if the risk is low, a green light will be displayed. The evaluated data is collaboratively controlled by the safety collaborative control module 5, which mainly includes the low-voltage branch switching switch 23 for low-voltage branch switching, and the current operation collaborative switching switch 24 can realize the current operation collaborative switching, and the voltage collaborative operation switching is realized through the voltage collaborative operation switching switch 25, and the encryption collaborative operation control host 26 realizes the encryption operation processing, and the control display 27 is followed for control display processing.

[0032] Step 3: During security assessment optimization, the data is evaluated and optimized through the security assessment optimization module 6, where the optimization docking is mainly performed through the optimization docking device 28, and the encryption assessment machine 29 performs encryption assessment optimization processing. After the encryption assessment machine 29 and the optimization docking device 28 perform encryption and optimization processing, the data is processed through the security encryption assessment instrument 30 for security encryption assessment processing. The data is transmitted to the information storage assessment device 31 through the security encryption assessment device 30, and the information storage assessment device 31 performs information evaluation and processing operation, and then the data is processed by the security assessment optimization module 6 and transmitted to the security automatic upgrade module 7 for security automatic upgrade processing. At the same time, the security password control switching processing of the security password control switch 32 is realized through the security automatic upgrade module 7, and the security password control switch 32 performs security update processing through the security update device 33. For the collaborative control data, the upgrade storage device 1 34 can be operated and stored, and the upgrade storage device 2 35 will perform backup storage again.

[0033] The contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A medium and low voltage coordinated control system for a distribution network based on the IEC international standard, comprising a standard formulation module (1), a safety data acquisition and monitoring module (2) and a safety data processing and analysis module (3), characterized in that: The safety data acquisition and monitoring module (2) is communicatively connected to the output end of the standard setting module (1), and the safety data processing and analysis module (3) is connected to the output end of the safety data acquisition and monitoring module (2) via a data line; The output end of the safety data processing and analysis module (3) is communicatively connected to a safety status assessment and early warning module (4), the docking end of the safety status assessment and early warning module (4) is connected to a safety coordination control module (5), and the output end of the safety coordination control module (5) is connected to a safety assessment optimization module (6); The wireless terminal of the security assessment optimization module (6) is connected to a security automatic upgrade module (7).

2. The low voltage coordinated control system for distribution network based on IEC international standards according to claim 1 is characterized in that: The standard setting module (1) and the safety data collection and monitoring module (2) are connected by a 5G network wireless router, and the number of 5G network wireless routers is set to two.

3. The low voltage coordinated control system for distribution network based on IEC international standards according to claim 1 is characterized in that: The standard setting module (1) comprises a communication data checker (8), an operation data standard checker (9) and a low-voltage collaborative standard operation host (10), and the output end of the communication data checker (8) is fixedly connected to the input end of the operation data standard checker (9), and the output end of the operation data standard checker (9) is fixedly connected to the input end of the low-voltage collaborative standard operation host (10).

4. The low voltage coordinated control system for distribution network based on IEC international standards according to claim 3 is characterized in that: The output sequence of the communication data checker (8), the operation data standard checker (9) and the low-voltage collaborative standard operation host (10) is arranged in sequence from front to back, and the communication data checker (8) and the low-voltage collaborative standard operation host (10) are symmetrically connected with respect to the operation data standard checker (9).

5. The low voltage coordinated control system for distribution network based on IEC international standards according to claim 1 is characterized in that: The safety data acquisition monitoring module (2) comprises a current safety detector (11), a voltage safety detector (12), a temperature safety detector (13), a low voltage calibration detector (14) and a data verification detector (15); The input end of the voltage safety detector (12) is connected to the current safety detector (11), and the output end of the voltage safety detector (12) is connected to the temperature safety detector (13), the low voltage calibration detector (14) is fixed to the output end of the temperature safety detector (13), and the data verification detector (15) is connected to the output end of the low voltage calibration detector (14); The current safety detector (11), the voltage safety detector (12), the temperature safety detector (13), the low voltage calibration detector (14) and the data verification detector (15) are operated in a sequential order from front to back.

6. The low voltage coordinated control system for distribution network based on IEC international standards according to claim 1 is characterized in that: The security data processing and analysis module (3) comprises an encryption analysis host (16), an encryption processing host (17) and a security rating host (18); The encryption analysis host (16) is fixed on the input end of the encryption processing host (17), while the security rating host (18) is fixed on the output end of the encryption processing host (17).

7. The low voltage coordinated control system for distribution network based on IEC international standards according to claim 1 is characterized in that: The safety status assessment and early warning module (4) comprises an encryption assessment host (19), a safety status display (20), a safety early warning host (21), and a remote early warning light (22); The encryption assessment host (19) is fixed on the input end of the safety status display (20), while the safety warning host (21) is fixed on the output end of the safety status display (20), and the remote warning light (22) is welded on one side of the safety warning host (21).

8. The low voltage coordinated control system for distribution network based on IEC international standards according to claim 1 is characterized in that: The safety cooperative control module (5) comprises a low-voltage branch switch (23), a current operation cooperative switch (24), a voltage cooperative operation switch (25) and an encrypted cooperative operation control host (26); The low-voltage branch switch (23) is fixed to the input end of the current operation cooperative switch (24), and the voltage cooperative operation switch (25) is fixed to the output end of the current operation cooperative switch (24). The encrypted cooperative operation control host (26) is connected to the communication end of the voltage cooperative operation switch (25), and the encrypted cooperative operation control host (26) is displayed as being connected to a control display (27).

9. The low voltage coordinated control system for distribution network based on IEC international standards according to claim 1 is characterized in that: The security assessment optimization module (6) comprises an optimization docking device (28) and an encryption assessment machine (29), wherein an output end of the optimization docking device (28) is communicatively connected to a security encryption assessment device (30), and the security encryption assessment device (30) is communicatively connected to the encryption assessment machine (29); The output end of the security encryption evaluator (30) is fixedly connected to an information storage evaluator (31).

10. The low voltage coordinated control system for distribution network based on IEC international standards according to claim 1, characterized in that: The output end of the standard setting module (1) is fixedly connected to a security password control switch (32) and a security update device (33), and the security update device (33) is fixed to the output end of the security password control switch (32), and the output end of the security update device (33) is connected to an upgrade storage device 1 (34) and an upgrade storage device 2 (35).

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