High-voltage frequency converter IRIG-B code time synchronization redundancy system

Abstract

The invention belongs to the field of automatic time synchronization, and particularly relates to a high-voltage frequency converter IRIG-B code time synchronization redundancy system, which comprises power plant total time service equipment serving as an IRIG-B code time source; the IRIG-B code decoding module comprises a plurality of decoding modules which are connected in parallel and is used for decoding an IRIG-B code and generating an IRIG-B code time message; the frequency converter PLC redundancy control system is a multi-frequency converter PLC control system and is used for carrying out time validity judgment on an IRIG-B code time message and determining IRIG-B code time synchronization data; the frequency converter main control system is a multi-frequency converter main control system and is used for generating a time effective flag bit according to the IRIG-B code time setting data; the water-cooling system PLC redundant system is a multi-water-cooling system PLC redundant system and is used for generating a time effective flag bit according to the IRIG-B code time setting data; and the frequency converter man-machine interface and the water cooling system man-machine interface are used for judging the time effective flag bit and determining the use time of the frequency converter man-machine interface and the use time of the water cooling system man-machine interface. The system is high in processing speed and high in output precision.

Description

Technical Field

[0001] The invention belongs to the field of automatic time synchronization, and in particular relates to a high-voltage frequency converter IRIG-B code time synchronization redundancy system. Background Art

[0002] In recent years, with the improvement of the automation level of power plants, computer monitoring systems, microcomputer protection devices, microcomputer fault recording devices and various data management machines have been widely used in power plants, and the coordination of these automatic devices requires an accurate and unified time. When a power system fails, it can not only realize the operation monitoring and post-accident fault analysis of all systems in the station under a unified time reference, but also analyze the cause and process of the accident through the sequence of each protection action, switch opening and closing, and accurate time. With the increasing complexity of the power grid, the increase in installed capacity and the expansion of the power grid, providing a clock reference for standard time has become an urgent need for power plants, substations and even the entire power system. The unification of clocks is an important measure to ensure the safe operation of the power system and improve the operation level. It is one of the most basic requirements of the integrated substation automation system.

[0003] As an important equipment in nuclear power plants, the control systems of high-voltage inverters are all designed with dual redundancy or multiple redundancy. Therefore, the inverter's timing system should also adopt a multiple redundancy method to ensure the reliability of timing of each device while being compatible with the existing product design structure.

[0004] At present, in the field of B-code timing, most technologies focus on the design and manufacture of B-code equipment. Therefore, it is necessary to develop a redundant design focusing on B-code in the nuclear power inverter timing system to meet the high reliability requirements of nuclear power. Summary of the invention

[0005] The object of the present invention is to provide a high-voltage frequency converter IRIG-B code timing redundancy system, which has the characteristics of fast processing speed and high output accuracy and can meet the high-precision requirements of the equipment for time.

[0006] The technical solution to achieve the purpose of the present invention is:

[0007] A high-voltage frequency converter IRIG-B code timing redundancy system, the system comprising: a power plant total timing device, an IRIG-B code decoding module, a frequency converter PLC redundancy control system, a frequency converter main control system, a water cooling system PLC redundancy system, a frequency converter human-machine interface, and a water cooling system human-machine interface;

[0008] The power plant's total timing equipment is the source of IRIG-B code time and provides accurate timing for the inverter system;

[0009] The IRIG-B code decoding module is a plurality of decoding modules connected in parallel, which is used to decode the IRIG-B code, generate the IRIG-B code time message, and calibrate the time of the device;

[0010] The inverter PLC redundant control system is a multi-inverter PLC control system, which is used to judge the time validity of the IRIG-B code time message and determine the IRIG-B code timing data;

[0011] The inverter master control system is a multi-inverter master control system, which is used to generate a time valid flag according to the IRIG-B code timing data; the water cooling system PLC redundant system is a multi-water cooling system PLC redundant system, which is used to generate a time valid flag according to the IRIG-B code timing data;

[0012] The inverter human-machine interface is used to judge the time validity flag and determine the usage time of the inverter human-machine interface; the water cooling system human-machine interface is used to judge the time validity flag and determine the usage time of the water cooling system human-machine interface.

[0013] The IRIG-B code time message data decoded by the IRIG-B code decoding module conforms to the MODBUSRTU protocol, and the IRIG-B code time message data has a total of 25 bytes, including: year, month, day, hour, minute, second and flag bit.

[0014] The IRIG-B code time message decoded by the IRIG-B code decoding module is sent to the inverter PLC redundant control system once every full second.

[0015] The IRIG-B code decoding module is two decoding modules connected in parallel; the inverter PLC redundant control system comprehensively judges the time validity according to the IRIG-B code time message and the communication status of the IRIG-B code decoding module, and selects one of the IRIG-B code time messages in the two IRIG-B code decoding modules as the standard current valid time, that is, the IRIG-B code timing data.

[0016] The inverter human-machine interface judges the time validity flag bit, including: when the time validity flag bit received by the inverter human-machine interface is 1, it indicates that the time is correct and valid, and the IRIG-B code is used to align the time data; when the time validity flag bit received by the inverter human-machine interface is 0, the inverter human-machine interface will not use the IRIG-B code to align the time data, but use the system internal time for timing;

[0017] The water cooling system human-machine interface judges the time validity flag bit, including: when the time validity flag bit received by the water cooling system human-machine interface is 1, it indicates that the time is correct and valid, and the IRIG-B code is used to sync the time data; when the time validity flag bit received by the water cooling system human-machine interface is 0, the water cooling human-machine interface will not use the IRIG-B code to sync the time data, but use the system internal time for timing.

[0018] When the inverter human-machine interface or water-cooling system human-machine interface uses IRIG-B code to synchronize time data, time synchronization is performed once a second, that is, the system time of the inverter human-machine interface or water-cooling system human-machine interface is updated once a second.

[0019] The inverter PLC redundant control system includes a remote IO communication module and a CPU module, and the remote IO communication module is connected to the CPU module to form a ring network; the remote IO communication module receives the IRIG-B code time message, and sends the IRIG-B code time message to the CPU module of the inverter, and the CPU module performs time validity judgment after receiving the IRIG-B code time message, determines the IRIG-B code timing data, and sends the determined IRIG-B code timing data to the remote IO communication module, and the remote IO communication module receives the IRIG-B code timing data, and sends the IRIG-B code timing data to the inverter main control system and the water cooling system PLC redundant system.

[0020] The CPU module includes two CPU modules, which are interconnected to ensure uninterrupted communication between the two CPU modules; one CPU module serves as a main CPU module to perform a process control role, and the other CPU module serves as a backup CPU module. Real-time data is synchronized between the main CPU module and the backup CPU module. When the main CPU module fails, the main CPU module and the backup CPU module can be quickly switched; the remote IO communication module includes two remote IO communication modules, each remote IO communication module is connected to a CPU module, the two remote IO communication modules are interconnected, and the remote IO communication module and the CPU module form a redundant ring network.

[0021] The inverter master control system includes three inverter master control systems, each of which is provided with two independent RS485 serial interfaces, which are respectively connected to two remote IO communication modules, and adopts MODBUSRTU communication bus. Data transmission has CRC check to ensure data reliability; the IRIG-B code timing data of the current effective inverter master control system is used as the timing data in the three inverter master control systems.

[0022] The water cooling system PLC redundant system comprises two water cooling system PLC redundant systems, each of which is provided with an RS485 serial interface, connected to a remote IO communication module, and adopts the MODBUSRUT bus protocol; in the two water cooling system PLC redundant systems, the IRIG-B code timing data received by the main water cooling system PLC redundant system is used as the timing data.

[0023] The system also includes an Ethernet switch, through which the inverter main control system is connected to the inverter human-machine interface, and the water cooling system PLC redundant system is connected to the water cooling system human-machine interface.

[0024] The Ethernet switch includes two Ethernet switches, one for connecting the frequency converter human-machine interface and the three-frequency converter main control system, and the other for connecting the water cooling system human-machine interface and the water cooling system PLC redundancy system.

[0025] The beneficial technical effects of the present invention are:

[0026] The present invention provides a high-voltage frequency converter IRIG-B code time synchronization redundant system, which first decodes the IRIG-B code, generates standard time data that conforms to the MODBUSRTU protocol after decoding, and outputs the time message from the RS485 serial interface to the frequency converter PLC redundant control system for time synchronization and time validity judgment. The frequency converter PLC redundant control system simultaneously sends the message to the three frequency converter main control system and the water cooling system PLC redundant system through the MODBUSRTU bus, and sends the message to the frequency converter human-machine interface and the water cooling system human-machine interface through Ethernet, which is used to calibrate the time of the equipment. It has the characteristics of fast processing speed and high output accuracy, and can meet the high-precision requirements of the equipment for time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the frequency converter IRIG-B code timing redundancy system in Example 1 provided by the present invention;

[0028] Figure 2 This is a decoding schematic diagram of the IRIG-B code decoding module in Example 1 provided by the present invention. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0030] The invention provides a high-voltage frequency converter IRIG-B code timing redundancy system, comprising: a power plant total timing device, an IRIG-B code decoding module, a frequency converter PLC redundancy control system, a frequency converter main control system, a water cooling system PLC redundancy system, a frequency converter human-machine interface, and a water cooling system human-machine interface.

[0031] The power plant's total timing equipment is the source of IRIG-B code time and provides accurate timing for the inverter system.

[0032] The IRIG-B code decoding module is a plurality of decoding modules connected in parallel, which is used to decode the IRIG-B code. After decoding each frame of input code elements, an IRIG-B code time message of the MODBUSRUT protocol is generated, which is used to calibrate the time of the device.

[0033] The inverter PLC redundant control system is a multi-inverter PLC control system, which is used to judge the time validity of IRIG-B code time messages and determine the IRIG-B code timing data.

[0034] The inverter master control system is a multi-inverter master control system, which is used to generate a time valid flag according to the IRIG-B code timing data; the water cooling system PLC redundant system is a multi-water cooling system PLC redundant system, which is used to generate a time valid flag according to the IRIG-B code timing data.

[0035] The inverter human-machine interface is used to judge the time validity flag and determine the usage time of the inverter human-machine interface; the water cooling system human-machine interface is used to judge the time validity flag and determine the usage time of the water cooling system human-machine interface.

[0036] The power plant's total timing equipment, IRIG-B code decoding module, and inverter PLC redundant control system are connected in sequence. The inverter PLC redundant control system is connected to the inverter main control system and the water cooling system PLC redundant system respectively. The inverter main control system is connected to the inverter human-machine interface, and the water cooling system PLC redundant system is connected to the water cooling system human-machine interface.

[0037] The power plant's total timing equipment is connected to the IRIG-B code decoding module inside the inverter through a shielded cable. The power plant's total timing equipment sends the IRIG-B code time pulse signal to the IRIG-B code decoding module; the IRIG-B code decoding module receives the IRIG-B code time pulse signal, converts the IRIG-B code time pulse signal into serial communication data, generates an IRIG-B code time message of the MODBUSRUT protocol, and sends the IRIG-B code time message to the inverter PLC redundant control system of the inverter; the inverter PLC redundant control system receives the IRIG-B code time message, then makes a time validity judgment, determines the IRIG-B code timing data, and sends the IRIG-B code The timing data is sent to the inverter main control system and the water cooling system PLC redundant system; the inverter main control system receives the IRIG-B code timing data, generates a time validity flag according to the IRIG-B code timing data, and sends the time validity flag to the inverter human-machine interface. The inverter human-machine interface receives the time validity flag and determines the usage time of the inverter human-machine interface according to the time validity flag; the water cooling system PLC redundant system receives the IRIG-B code timing data, generates a time validity flag according to the IRIG-B code timing data, and sends the time validity flag to the water cooling system human-machine interface. The water cooling system human-machine interface receives the time validity flag and determines the usage time of the water cooling system human-machine interface according to the time validity flag.

[0038] The interface definition of the IRIG-B code decoding module is shown in Table 1.

[0039] Table 1 IRIG-B code decoding module interface definition

[0040]

[0041] The signal sent from the total timing equipment of the power plant is connected to the B+ / B- input terminal of the IRIG-B code decoding module; the IRIG-B code time message generated after decoding by the IRIG-B code decoding module is output from the T+ / T- time output terminal, which is an RS485 level signal and a standard MODBUSRTU protocol. The communication adopts the Modbus-RTU master-slave mode with the IRIG-B code decoding module as the master station and the inverter PLC redundant control system as the slave station. The Modbus-RTU protocol format is adopted, and the serial port baud rate is 9600bps. The IRIG-B code time message data decoded by the IRIG-B code decoding module is a total of 25 bytes, including: year, month, day, hour, minute, second and flag bit. The IRIG-B code time message decoded by the IRIG-B code decoding module is sent to the inverter PLC redundant control system once every full second.

[0042] In a specific embodiment, the IRIG-B code decoding module is two decoding modules in parallel. The inverter PLC redundant control system comprehensively judges the time validity based on the IRIG-B code time message and the communication status of the IRIG-B code decoding module, and selects one of the IRIG-B code time messages in the two IRIG-B code decoding modules as the standard current valid time, that is, the IRIG-B code timing data. The inverter PLC redundant control system sends the IRIG-B code timing data to the inverter main control system and the water cooling system PLC redundant system respectively. The inverter main control system and the water cooling system PLC redundant system receive the IRIG-B code timing data respectively, generate a time validity flag according to the IRIG-B code timing data, and send the time validity flag to the inverter human-machine interface and the water cooling system human-machine interface.

[0043] When the valid flag bit of the time received by the inverter human-machine interface or the water-cooling system human-machine interface is 1, it means that the time is correct and valid, and the IRIG-B code timing data is used to synchronize the time once a second, that is, the system time of the human-machine interface is updated once a second; when the valid flag bit of the time received by the inverter human-machine interface or the water-cooling system human-machine interface is 0, the inverter human-machine interface and the water-cooling human-machine interface will not use the IRIG-B code timing data, but use the system internal time for timing.

[0044] In another specific embodiment, the inverter PLC redundant control system includes a remote IO communication module and a CPU module, and the remote IO communication module is connected to the CPU module via Ethernet, and the remote IO communication module and the CPU module form a ring network. The IRIG-B code time message decoded by the IRIG-B code decoding module is sent to the remote IO communication module once every full second. The remote IO communication module receives the IRIG-B code time message, and sends the IRIG-B code time message to the CPU module of the inverter. After receiving the IRIG-B code time message, the CPU module performs a time validity judgment, determines the IRIG-B code timing data, and sends the determined IRIG-B code timing data to the remote IO communication module. The remote IO communication module receives the IRIG-B code timing data, and sends the IRIG-B code timing data to the inverter main control system and the water cooling system PLC redundant system.

[0045] In another specific embodiment, a high-voltage inverter IRIG-B code timing redundancy system provided by the present invention also includes an Ethernet switch, the inverter main control system is connected to the inverter human-machine interface through the Ethernet switch, and the water cooling system PLC redundancy system is connected to the water cooling system human-machine interface through the Ethernet switch.

[0046] In another specific implementation, the IRIG-B code decoding module is connected to the remote IO communication module via an RS485 communication line, the remote IO communication module is connected to the CPU module via Ethernet, and the remote IO communication module and the CPU module form a ring network; the remote IO communication module is respectively connected to the inverter main control system and the water cooling system PLC redundant system.

[0047] Example 1

[0048] like Figure 1 As shown, a high-voltage inverter IRIG-B code timing redundancy system provided by the present invention includes: a power plant total timing equipment A1, an IRIG-B code decoding module B1 / B2, an inverter PLC redundant control system C1 / C2 / C3 / C4, an inverter main control system D1 / D2 / D3, a water cooling system PLC redundant system D4 / D5, an Ethernet switch E1 / E2, an inverter human-machine interface F1, and a water cooling system human-machine interface F2.

[0049] A1 is the main timing equipment of the power plant and the time source of the IRIG-B code.

[0050] B1 / B2 are two identical IRIG-B code decoding modules, used in pairs for redundancy, to convert B code pulse signals into serial communication data.

[0051] C1 / C2 / C3 / C4 is a variable frequency PLC redundant control system, C1 and C2 are a set of redundant CPU modules. C3 and C4 are a set of redundant remote IO communication modules, and the hardware configurations of the two sets are exactly the same.

[0052] D1 / D2 / D3 is a three-inverter master control system. The three inverter master control hardware is exactly the same and serves as backup for each other. Each inverter master control system has two RS485 serial ports with the same hardware structure and communication protocol, which are used for redundancy.

[0053] D4 / D5 is a water cooling system PLC redundant system, one master and one slave are backup for each other. The hardware configuration is also exactly the same. It communicates with the upper inverter PLC redundant control system through RS485 serial interface, MODBUSRUT bus protocol, and communicates with the human-machine interface of this system (such as touch screen) through Ethernet.

[0054] E1 / E2 are Ethernet switches, E1 is the interface switch between the inverter human-machine interface and the three-inverter main control system. E2 is the interface switch between the water cooling system human-machine interface and the water cooling system PLC redundant system.

[0055] F1 / F2 is the inverter human-machine interface and the water cooling system human-machine interface, which can be specifically the inverter touch screen and the water cooling system touch screen, which store alarm records and operating time. It is the core equipment of the time synchronization application and is connected to the upper-level inverter main control system and the water cooling system PLC redundant system through two Ethernet switches respectively.

[0056] like Figure 1 As shown, A1 is the total timing equipment of the power plant, which is connected to the IRIG-B code decoding module inside the inverter by a shielded cable to provide accurate timing for the inverter system.

[0057] B1 and B2 are two identical IRIG-B code decoding modules. The IRIG-B decoding module is a device specifically used to decode the IRIG-B code. After decoding each frame of input code elements, it generates a MODBUSRUT communication message for calibrating the device.

[0058] The schematic diagram of IRIG-B code decoding module is as follows Figure 2 As shown, the input end of the IRIG-B code decoding module uses the same B code signal in parallel to output two standard MODBUSRTU protocol time message data to the two remote IO communication modules of the inverter PLC redundant control system.

[0059] C1 / C2 / C3 / C4 is a redundant control system for inverter PLC. C1 / C2 is the central controller (i.e., CPU module), one for use and one for backup. The two are connected through the X5 optical fiber port on the controller and equipped with two optical cables, each with two cores, one for receiving data and one for sending data. The two optical cables are redundant to ensure uninterrupted communication. One of the two PLCCPU modules in the redundant system performs the process control role, and the other CPU module serves as a follower CPU. During operation, the roles of each CPU module may change. All relevant data are synchronized from the main CPU module to the backup CPU module through the redundantly connected optical cable. Since the real-time data synchronization between the main CPU module and the backup CPU module ensures that the CPU modules can be quickly switched when the main CPU module fails.

[0060] C3 / C4 is the remote IO communication module of the inverter PLC redundant control system. It forms a redundant ring network through the Ethernet port X6 and the X6 port of the CPU module, and adopts the NAP S2 redundancy protocol to ensure the coordination of the network data link.

[0061] The main CPU module of the inverter PLC redundant control system exchanges data with the two remote IO communication modules through the Ethernet ring network. The two IRIG-B code decoding modules send the B code time message to the X5 interface of the C3 and C4 remote IO communication modules through the RS485 communication line respectively. The inverter PLC determines which time data is valid and transmits it as the IRIG-B code timing data to the inverter main control system and the water cooling system PLC redundant system.

[0062] D1 / D2 / D3 is a three-inverter master control system. The X1 and X2 interfaces on the inverter master control system are RS485 serial interfaces. The two interfaces are physically isolated independent interfaces, which are respectively connected to the remote IO communication modules of the two inverter PLC redundant control systems. MODBUSRTU communication bus is used. Data transmission has CRC check to ensure data reliability. The IRIG-B code synchronization data of the current effective inverter master control system is used as the time calibration data in the three inverter master control systems, and the data communication cycle is 100ms.

[0063] D4 / D5 is the water cooling system PLC redundant system, which also uses RS485 serial interface and MODBUSRUT bus protocol. In the two water cooling system PLC redundant systems, the IRIG-B code timing data received by the main water cooling system PLC redundant system is used as the timing data, and the data communication cycle is also 100ms.

[0064] E1 / E2 are Ethernet switches, E1 is the interface switch between the inverter human-machine interface and the three-inverter main control system. E2 is the interface switch between the water cooling system human-machine interface and the water cooling system PLC redundant system.

[0065] F1 / F2 is the inverter human-machine interface and water cooling system human-machine interface, which are connected to the upper inverter main control system and water cooling system PLC redundancy system through two Ethernet switches respectively. It receives the time data and judges according to the valid bit of the time data received together. If the valid bit is 1, the B code time data is used, and if the valid bit is 0, the system time is used.

[0066] The present invention is described in detail above with reference to the accompanying drawings and embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of ordinary technicians in the field without departing from the purpose of the present invention. The contents not described in detail in the present invention can adopt the existing technology.

Claims

1. A high voltage frequency converter IRIG-B code timing redundancy system, characterized in that: The system includes: power plant total timing equipment, IRIG-B code decoding module, inverter PLC redundant control system, inverter main control system, water cooling system PLC redundant system, inverter human-machine interface, water cooling system human-machine interface; The power plant's total timing equipment is the source of IRIG-B code time and provides accurate timing for the inverter system; The IRIG-B code decoding module is a plurality of decoding modules connected in parallel, which is used to decode the IRIG-B code, generate the IRIG-B code time message, and calibrate the time of the device; The inverter PLC redundant control system is a multi-inverter PLC control system, which is used to judge the time validity of the IRIG-B code time message and determine the IRIG-B code timing data; The inverter master control system is a multi-inverter master control system, which is used to generate a time valid flag according to the IRIG-B code timing data; the water cooling system PLC redundant system is a multi-water cooling system PLC redundant system, which is used to generate a time valid flag according to the IRIG-B code timing data; The inverter human-machine interface is used to judge the time validity flag and determine the usage time of the inverter human-machine interface; the water cooling system human-machine interface is used to judge the time validity flag and determine the usage time of the water cooling system human-machine interface.

2. A high-voltage frequency converter IRIG-B code timing redundancy system according to claim 1, characterized in that: The IRIG-B code time message data decoded by the IRIG-B code decoding module conforms to the MODBUSRTU protocol, and the IRIG-B code time message data has a total of 25 bytes, including: year, month, day, hour, minute, second and flag bit.

3. The high-voltage frequency converter IRIG-B code timing redundancy system according to claim 1, characterized in that: The IRIG-B code time message decoded by the IRIG-B code decoding module is sent to the inverter PLC redundant control system once every full second.

4. The high-voltage frequency converter IRIG-B code timing redundancy system according to claim 1, characterized in that: The IRIG-B code decoding module is two decoding modules connected in parallel; the inverter PLC redundant control system comprehensively judges the time validity according to the IRIG-B code time message and the communication status of the IRIG-B code decoding module, and selects one of the IRIG-B code time messages in the two IRIG-B code decoding modules as the standard current valid time, that is, the IRIG-B code timing data.

5. The high-voltage frequency converter IRIG-B code timing redundancy system according to claim 1, characterized in that: The inverter human-machine interface judges the time validity flag bit, including: when the time validity flag bit received by the inverter human-machine interface is 1, it indicates that the time is correct and valid, and the IRIG-B code is used to align the time data; when the time validity flag bit received by the inverter human-machine interface is 0, the inverter human-machine interface will not use the IRIG-B code to align the time data, but use the system internal time for timing; The water cooling system human-machine interface judges the time validity flag bit, including: when the time validity flag bit received by the water cooling system human-machine interface is 1, it indicates that the time is correct and valid, and the IRIG-B code is used to sync the time data; when the time validity flag bit received by the water cooling system human-machine interface is 0, the water cooling human-machine interface will not use the IRIG-B code to sync the time data, but use the system internal time for timing.

6. A high-voltage frequency converter IRIG-B code timing redundancy system according to claim 1, characterized in that: When the inverter human-machine interface or water-cooling system human-machine interface uses IRIG-B code to synchronize time data, time synchronization is performed once a second, that is, the system time of the inverter human-machine interface or water-cooling system human-machine interface is updated once a second.

7. The high-voltage frequency converter IRIG-B code timing redundancy system according to claim 1, characterized in that: The inverter PLC redundant control system includes a remote IO communication module and a CPU module, and the remote IO communication module is connected to the CPU module to form a ring network; the remote IO communication module receives the IRIG-B code time message, and sends the IRIG-B code time message to the CPU module of the inverter, and the CPU module performs time validity judgment after receiving the IRIG-B code time message, determines the IRIG-B code timing data, and sends the determined IRIG-B code timing data to the remote IO communication module, and the remote IO communication module receives the IRIG-B code timing data, and sends the IRIG-B code timing data to the inverter main control system and the water cooling system PLC redundant system.

8. A high-voltage frequency converter IRIG-B code timing redundancy system according to claim 7, characterized in that: The CPU module includes two CPU modules, which are interconnected to ensure uninterrupted communication between the two CPU modules; one CPU module serves as a main CPU module to perform a process control role, and the other CPU module serves as a backup CPU module. Real-time data is synchronized between the main CPU module and the backup CPU module. When the main CPU module fails, the main CPU module and the backup CPU module can be quickly switched; the remote IO communication module includes two remote IO communication modules, each remote IO communication module is connected to a CPU module, the two remote IO communication modules are interconnected, and the remote IO communication module and the CPU module form a redundant ring network.

9. A high-voltage frequency converter IRIG-B code timing redundancy system according to claim 8, characterized in that: The inverter master control system includes three inverter master control systems, each of which is provided with two independent RS485 serial interfaces, which are respectively connected to two remote IO communication modules, and adopts MODBUSRTU communication bus. Data transmission has CRC check to ensure data reliability; the IRIG-B code timing data of the current effective inverter master control system is used as the timing data in the three inverter master control systems.

10. The high-voltage frequency converter IRIG-B code timing redundancy system according to claim 8, characterized in that: The water cooling system PLC redundant system comprises two water cooling system PLC redundant systems, each of which is provided with an RS485 serial interface, connected to a remote IO communication module, and adopts the MODBUSRUT bus protocol; in the two water cooling system PLC redundant systems, the IRIG-B code timing data received by the main water cooling system PLC redundant system is used as the timing data.

11. The high voltage frequency converter IRIG-B code timing redundancy system according to claim 1, characterized in that: The system also includes an Ethernet switch, through which the inverter main control system is connected to the inverter human-machine interface, and the water cooling system PLC redundant system is connected to the water cooling system human-machine interface.

12. A high voltage frequency converter IRIG-B code timing redundancy system according to claim 11, characterized in that: The Ethernet switch includes two Ethernet switches, one for connecting the frequency converter human-machine interface and the three-frequency converter main control system, and the other for connecting the water cooling system human-machine interface and the water cooling system PLC redundancy system.

Images