Nuclear grade charging system, control method and nuclear grade charging paralleling system

Abstract

The application provides a nuclear-grade charging system, a control method and a nuclear-grade charging parallel system. The nuclear-grade charging system comprises N controllers and N parallelly connected power conversion modules; each controller comprises at least N output ports; N is a positive integer and N is greater than or equal to 2; an Ith output port of an Ith controller is connected with an Ith power conversion module; the Ith output port of the Ith controller outputs a driving signal for controlling the Ith power conversion module; I is a positive integer and 1 is less than or equal to I and I is less than or equal to N. When any one controller or any multiple controllers fail, as long as at least one controller can work normally, the normally working controller can control the corresponding power conversion module to work, the nuclear-grade charging system output is ensured to be uninterrupted, and the reliability is extremely strong; in addition, when all the controllers work normally, only one output port is used, therefore, the remaining output ports of all the controllers can be used for expansion.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of charging, in particular to a nuclear-grade charging system, a control method and a nuclear-grade charging parallel system. BACKGROUND

[0002] A charging system can charge a device to be charged. For a charging system applied to a nuclear power plant, since the energy of the nuclear power plant is dangerous, once the charging system is powered off, it will have an incalculable consequence, therefore, the nuclear power plant charging system has higher requirements for the reliability of the system.

[0003] At present, the charging system realizes the above functions through the control of a main control module, however, when the main control module fails, the charging system will be powered off. In order to solve the problem that the failure of a single main control module causes the charging system to be powered off, a standby main control module is arranged, and when the main control module fails, the standby main control module is switched to control. However, this way still needs a certain time when the main control module is switched to the standby main control module, and in this period of time, the main control module fails to work, the standby main control module has not started to work, and is still in a powered-off state, so the reliability is poor. SUMMARY

[0004] The embodiments of the present application provide a nuclear-grade charging system, a control method and a nuclear-grade charging parallel system, to solve the problem that the existing charging system is powered off when the main control module fails, and the reliability is poor.

[0005] In a first aspect, the embodiments of the present application provide a nuclear-grade charging system, comprising N controllers and N power conversion modules connected in parallel; each controller comprises at least N output ports; N is a positive integer and N≥2;

[0006] The Ith output port of the Ith controller is connected with the Ith power conversion module; the Ith output port of the Ith controller outputs a driving signal used for controlling the Ith power conversion module; I is a positive integer and 1≤I≤N.

[0007] In a possible implementation, when K controllers fail and the remaining N-K controllers work normally, K power conversion modules controlled by the K controllers are controlled by the N-K controllers; K is a positive integer and 1≤K≤N-1.

[0008] In a possible implementation, the N controllers are communicatively connected;

[0009] When any one controller detects that itself fails, the any one controller sends a failure signal to other controllers; the any one controller is used for controlling a target power conversion module;

[0010] The controller receiving the failure signal determines a target controller according to a preset rule.

[0011] The target controller controls an output of a drive signal for controlling a target power conversion module.

[0012] In a possible implementation, the N controllers are communicatively connected;

[0013] The N controllers achieve current sharing control of the N power conversion modules through mutual communication.

[0014] In a possible implementation, the nuclear charging system further comprises at least two power supplies;

[0015] Each power supply supplies power to the N controllers.

[0016] In a possible implementation, the power supply comprises a power supply adapter board and a power supply board;

[0017] The first input end of the power supply adapter board is connected to an AC input source, the second input end of the power supply adapter board is connected to a DC input source, the output end of the power supply adapter board outputs first DC power, the input end of the power supply board is connected to the output end of the power supply adapter board, and the output end of the power supply board outputs second DC power for supplying power to the N controllers.

[0018] In a possible implementation, for each controller, each output port of the controller is connected to a corresponding power conversion module.

[0019] In a possible implementation, the nuclear charging system further comprises N drive adapter boards;

[0020] The Lth output port of each controller is connected to the Lth power conversion module through the Lth drive adapter board; L is a positive integer, and 1≤L≤N.

[0021] In a second aspect, an embodiment of the present application provides a control method, applied to any one of the controllers in the nuclear charging system as described in the first aspect or any possible implementation of the first aspect, and the control method comprises the following steps:

[0022] Controlling an output of a drive signal for controlling a corresponding power conversion module;

[0023] When receiving a failure signal sent by any one of the other controllers and determining that the controller is a target controller according to a preset rule, controlling an output of a drive signal for controlling a target power conversion module; the target power conversion module is a power conversion module controlled by a failed controller.

[0024] In a third aspect, an embodiment of the present application provides a nuclear charging parallel system, comprising at least two nuclear charging systems as described in the first aspect or any possible implementation of the first aspect;

[0025] The output ends of the nuclear level charging systems are connected in parallel; each controller included in each nuclear level charging system is connected in communication;

[0026] When at least one power conversion module in the nuclear level charging parallel system fails, each controller in the nuclear level charging parallel system communicates with each other to realize current sharing control of the normally working power conversion modules in the nuclear level charging parallel system.

[0027] The embodiment of the present application provides a nuclear level charging system, a control method and a nuclear level charging parallel system, the nuclear level charging system comprises N power conversion modules and N controllers; each controller comprises at least N output ports; N is a positive integer and N>=2; the Ith output port of the Ith controller is connected with the Ith power conversion module; the Ith output port of the Ith controller outputs a driving signal used for controlling the Ith power conversion module; I is a positive integer and 1<=I<=N. In the nuclear level charging system, even if any controller or any multiple controllers fail, as long as at least one controller can work normally, the normally working controller can control the corresponding power conversion module to work, the nuclear level charging system output is ensured to be uninterrupted, and the reliability is extremely strong; in addition, each controller comprises at least N output ports, but only one output port is used when each controller works normally, therefore, the remaining output ports of each controller can be used for expansion, and therefore, the nuclear level charging system is convenient for expansion. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0029] Figure 1 It is a structure schematic diagram of the nuclear level charging system provided by the embodiment of the present application;

[0030] Figure 2 It is a flow schematic diagram of the control method provided by the embodiment of the present application;

[0031] Figure 3 It is a schematic diagram of the controller provided by the embodiment of the present application. DETAILED DESCRIPTION

[0032] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0034] See Figure 1 The diagram shows a schematic of the structure of the nuclear-level charging system provided in an embodiment of the present invention.

[0035] The aforementioned nuclear-grade charging system includes N controllers 11 and N power conversion modules 12 connected in parallel; each controller 11 includes at least N output ports; N is a positive integer and N≥2;

[0036] The I-th output port of the I-th controller 11 is connected to the I-th power conversion module 12; the I-th output port of the I-th controller 11 outputs a drive signal for controlling the I-th power conversion module 12; I is a positive integer, and 1≤I≤N.

[0037] It should be noted that, in order to ensure the clarity of the attached diagram, Figure 1 Only the nuclear-level charging system containing two controllers 11 and two power conversion modules 12 is shown in the figure. Figure 1 Although both controllers in the diagram are labeled 11, they represent two different controllers. Figure 1 Although the power conversion modules in the diagram are all labeled 12, they represent two different power conversion modules.

[0038] In this embodiment, for I from 1 to N, the I-th output port of the I-th controller 11 is connected to the I-th power conversion module 12; the I-th output port of the I-th controller 11 outputs a drive signal for controlling the I-th power conversion module 12. That is, the first output port of the first controller 11 is connected to the first power conversion module 12, the second output port of the second controller 11 is connected to the second power conversion module 12, ..., the N-th output port of the N-th controller 11 is connected to the N-th power conversion module 12.

[0039] The N controllers 11 are all the same controller 11, and each controller 11 can generate driving signals for controlling the N power conversion modules 12 respectively and output through different output ports. That is, for each controller 11, the first output port of the controller 11 can output a driving signal for controlling the first power conversion module 12, the second output port of the controller 11 can output a driving signal for controlling the second power conversion module 12, and the Nth output port of the controller 11 can output a driving signal for controlling the Nth power conversion module 12. However, to ensure reliability, when the N controllers 11 are all working normally, each controller 11 only controls its corresponding power conversion module 12, and other power conversion modules 12 are controlled by other corresponding controllers 11. For example, the first power conversion module 12 is controlled by the first controller 11, the second power conversion module 12 is controlled by the second controller 11, and the Nth power conversion module 12 is controlled by the Nth controller 11. The order of the power conversion modules 12 and the controllers 11 can be set according to actual needs. The order of the output ports of the controllers 11 can be set according to actual needs, but the N controllers 11 can use the same order rule to sort their own output ports.

[0040] The input end of the N power conversion modules 12 connected in parallel is used to connect an input power supply, and the output end of the N power conversion modules 12 connected in parallel is used to connect a device to be charged. The power conversion module 12 can be a rectifier module, an inverter module, or other power conversion modules, which are not limited here. When the power conversion module 12 is a rectifier module, the input end of the N rectifier modules connected in parallel is used to connect an alternating current power supply, and the output end of the N rectifier modules connected in parallel is used to connect a device to be charged. When the power conversion module 12 is an inverter module, the input end of the N inverter modules connected in parallel is used to connect a direct current power supply, and the output end of the N inverter modules connected in parallel is used to connect a device to be charged.

[0041] Exemplarily, when N = 2, the nuclear-level charging system includes 2 controllers 11 and 2 power conversion modules 12 connected in parallel; each controller 11 includes at least 2 output ports; that is, the nuclear-level charging system can include a first controller, a second controller, and first and second power conversion modules connected in parallel.

[0042] The first output port of the first controller is connected with the first power conversion module, and the second output port of the second controller is connected with the second power conversion module. The first output port of the first controller outputs a first driving signal for controlling the first power conversion module, and the second output port of the second controller outputs a second driving signal for controlling the second power conversion module.

[0043] When N=3, the nuclear-grade charging system can include a first controller, a second controller, a third controller, and a first power conversion module, a second power conversion module, and a third power conversion module connected in parallel.

[0044] A first output port of the first controller is connected with the first power conversion module, a second output port of the second controller is connected with the second power conversion module, and a third output port of the third controller is connected with the third power conversion module. The first output port of the first controller outputs a first driving signal for controlling the first power conversion module; the second output port of the second controller outputs a second driving signal for controlling the second power conversion module; and the third output port of the third controller outputs a third driving signal for controlling the third power conversion module.

[0045] The method for each controller 11 to generate a driving signal of each power conversion module 12 can be implemented by using an existing method, and is not specifically limited herein.

[0046] The nuclear-grade charging system provided by the embodiment includes N power conversion modules 12 and N controllers 11; each controller 11 includes at least N output ports; N is a positive integer and N≥2; an Ith output port of an Ith controller 11 is connected with an Ith power conversion module 12; the Ith output port of the Ith controller 11 outputs a driving signal for controlling the Ith power conversion module 12; I is a positive integer and 1≤I≤N. In the nuclear-grade charging system, even if any one controller 11 or any multiple controllers 11 fail, as long as at least one controller 11 can work normally, the normally working controller 11 can control the corresponding power conversion module 12 to work, thereby ensuring that the nuclear-grade charging system outputs uninterrupted power supply and has extremely high reliability; in addition, each controller 11 includes at least N output ports, but only one output port is used when each controller 11 works normally, and therefore the remaining output ports of each controller 11 can be used for expansion, so that the nuclear-grade charging system is convenient for expansion.

[0047] In some embodiments, when K controllers 11 fail and the remaining N-K controllers 11 work normally, K power conversion modules 12 controlled by the K controllers 11 are controlled by the N-K controllers 11; K is a positive integer and 1≤K≤N-1.

[0048] The failure of a controller 11 means that the controller 11 is faulty and cannot work normally, i.e., cannot control the power conversion module 12 currently controlled by the controller 11. The normal working of a controller 11 means that the controller 11 can output a corresponding driving signal through a corresponding output port to control the power conversion module 12.

[0049] The N controllers 11 in the embodiment can be redundant to each other, and when part of the controllers 11 fail to work, the power conversion modules 12 controlled by the failed controllers 11 can be taken over by the remaining controllers 11 that can normally work. The takeover rules can be set according to actual needs, and are not specifically limited here. For example, the normally working controllers 11 can be randomly selected to take over, or can take over in turn according to the average principle, and the like.

[0050] The N controllers 11 in the embodiment can be redundant to each other, and when part of the controllers 11 fail to work, the power conversion modules 12 controlled by the failed controllers 11 can be taken over by the remaining controllers 11 that can normally work. The takeover rules can be set according to actual needs, and are not specifically limited here. For example, the normally working controllers 11 can be randomly selected to take over, or can take over in turn according to the average principle, and the like.

[0051] Exemplarily, when N = 2, as described above, the nuclear charging system can include a first controller, a second controller, and a first power conversion module and a second power conversion module connected in parallel. When the first controller fails and the second controller normally works, a first output port of the second controller outputs a first drive signal for controlling the first power conversion module, and a second output port of the second controller outputs a second drive signal for controlling the second power conversion module; when the second controller fails and the first controller normally works, a first output port of the first controller outputs a first drive signal for controlling the first power conversion module, and a second output port of the first controller outputs a second drive signal for controlling the second power conversion module.

[0052] When N = 3, as described above, the nuclear charging system can include a first controller, a second controller, a third controller, and a first power conversion module, a second power conversion module, and a third power conversion module connected in parallel. When the first controller fails and the second controller and the third controller normally work, the first drive signal can be output by a first output port of the second controller for controlling the first power conversion module, or the first drive signal can be output by a first output port of the third controller for controlling the first power conversion module. When only the second controller fails or only the third controller fails, the control conditions are similar and are not described again. When the first controller and the second controller fail and only the third controller normally works, a first output port of the third controller outputs a first drive signal for controlling the first power conversion module, a second output port of the third controller outputs a second drive signal for controlling the second power conversion module, and a third output port of the third controller outputs a third drive signal for controlling the third power conversion module. When only the first controller or the second controller normally works, the conditions are similar and are not described again.

[0053] In some embodiments, the N controllers 11 are communicatively connected;

[0054] When any one of the controllers 11 detects that it is failed, it sends a failure signal to the other controllers 11; the any one of the controllers 11 is configured to control a target power conversion module;

[0055] The controller 11 receiving the failure signal determines a target controller according to a preset rule;

[0056] The target controller controls its output to output a drive signal for controlling the target power conversion module.

[0057] The controllers 11 can be communicatively connected through a bus, for example, a CAN (Controller Area Network) bus. Through mutual communication, the controllers 11 can know the status of each other.

[0058] When any one of the controllers 11 in the nuclear charging system detects that it is failed, it can report its failure signal.

[0059] The controller 11 in normal operation can receive the failure signal through the bus, and can determine whether it is the target controller according to an internally preset rule. The target controller is the controller 11 taking over the control of the power conversion module (target power conversion module) corresponding to the failed controller 11.

[0060] The target controller can control its corresponding output port to output a drive signal for controlling the target power conversion module, so as to control the target power conversion module. For example, assuming that the third controller is failed, the target power conversion module is the third power conversion module, and the target controller can control its third output port to output a drive signal for controlling the third power conversion module.

[0061] The preset rule can be set according to actual requirements. For example, the preset rule can be to randomly select the target controller from the controllers 11 in normal operation; or to determine the target controller from the controllers 11 in normal operation according to a predetermined order; or to determine the target controller based on the number of power conversion modules 12 currently controlled by the controllers 11 in normal operation, and select the controller 11 controlling the least number of power conversion modules 12 as the target controller, if there are at least two target controllers, determine the final target controller 11 according to a preset order; and the like.

[0062] In some possible implementations, the N controllers 11 can compete for a master, and the master executes the control strategy described above to determine the target controller. When the master fails, the remaining normal working controllers 11 re-competes for the master. The N controllers 11 can also each execute the control strategy described above to determine the target controller according to the same preset rule.

[0063] Exemplarily, when N = 2, as described above, the nuclear level charging system can include a first controller, a second controller, and a first power conversion module and a second power conversion module connected in parallel. The first controller sends a first failure signal to the second controller when detecting that the first controller itself fails, and the second controller controls a first output port of the second controller to output a first drive signal when receiving the first failure signal. The second controller sends a second failure signal to the first controller when detecting that the second controller itself fails, and the first controller controls a second output port of the first controller to output a second drive signal when receiving the second failure signal.

[0064] When N = 3, as described above, the nuclear level charging system can include a first controller, a second controller, a third controller, and a first power conversion module, a second power conversion module, and a third power conversion module connected in parallel. The first controller sends a first failure signal to the second controller and the third controller when detecting that the first controller itself fails, and the second controller and the third controller determine a target controller according to a preset rule when receiving the first failure signal. If the second controller is the target controller, the second controller controls a first output port of the second controller to output a first drive signal. If the third controller is the target controller, the third controller controls a first output port of the third controller to output the first drive signal. When the second controller and the third controller fail, the situation is similar, and is not described herein again.

[0065] In some embodiments, the N controllers 11 are communicatively connected;

[0066] The N controllers 11 achieve current sharing control of the N power conversion modules 12 by communicating with each other.

[0067] In this embodiment, the N controllers 11 can obtain the currents of the N power conversion modules 12 by communicating with each other, determine an average current based on the currents of the N power conversion modules 12, take the average current as a current given value, take the current of the corresponding power conversion module 12 as a current actual value, and perform current sharing control to achieve current sharing of the N power conversion modules 12 and prevent the reverse flow problem caused by uneven current of the N power conversion modules 12.

[0068] The N controllers 11 can also communicate with each other to interact with the floating states, realize synchronous floating state conversion of the modules, interact with the key parameters of the modules, realize matching verification of the key parameters of the modules, and interact with the working states and driving states of the modules to realize flexible conversion of the driving signals in the redundancy mode and ensure normal working of the nuclear charging system.

[0069] In some embodiments, the nuclear charging system further comprises at least two power supplies.

[0070] Each power supply supplies power to the N controllers 11.

[0071] In the embodiment, to ensure the power supply reliability of the controllers 11, at least two power supplies are used to supply power to the N controllers 11, and when one power supply fails, the other power supply can ensure the controllers 11 to be powered on, thereby ensuring the reliability of the nuclear charging system.

[0072] In some embodiments, the power supply comprises a power supply adapter board and a power supply board.

[0073] The first input end of the power supply adapter board is connected to an AC input source, the second input end of the power supply adapter board is connected to a DC input source, the output end of the power supply adapter board outputs first DC power, the input end of the power supply board is connected to the output end of the power supply adapter board, and the output end of the power supply board outputs second DC power for supplying power to the N controllers 11.

[0074] The power supply adapter board can comprise a rectifier unit for converting AC power at the first input end thereof into DC power. The power supply adapter board can further comprise a diode, the anode of the diode being connected to the second input end of the power supply adapter board, and the cathode of the diode being connected in parallel to the output of the rectifier unit as the output end of the power supply adapter board, which outputs the first DC power. The power supply board is used to convert the first DC power into second DC power capable of supplying power to the controllers 11. The power supply board can also convert the first DC power into third DC power for supplying power to other devices requiring power.

[0075] The power supply adapter board is connected to two input sources, which can ensure the reliability of power supply.

[0076] The structures of the power supplies can be the same.

[0077] In some embodiments, for each controller 11, each output port of the controller 11 is connected to a corresponding power conversion module 12.

[0078] In the embodiment, the first N output ports of each controller 11 are connected with the corresponding power conversion modules 12, and the remaining output ports can be used as backup or for expansion, etc. For example, the first output port of the controller 11 is connected with the first power conversion module 12, the second output port of the controller 11 is connected with the second power conversion module 12, and so on.

[0079] It should be noted that the controller 11 corresponds to the power conversion module 12 one by one, and although the single controller 11 is connected with each power conversion module 12, the controller 11 only controls the corresponding power conversion module 12 when each controller 11 is working normally. The controller 11 is connected with each power conversion module 12, which can realize quick switching control when other controllers 11 fail.

[0080] In some embodiments, the nuclear charging system further comprises N drive adapters;

[0081] The Lth output port of each controller 11 is connected with the Lth power conversion module 12 through the Lth drive adapter; L is a positive integer, and 1≤L≤N.

[0082] In the embodiment, for L from 1 to N, the Lth output port of each controller 11 is connected with the Lth power conversion module 12 through the Lth drive adapter.

[0083] For each controller 11, the first output port of the controller 11 is connected with the first power conversion module 12 through the first drive adapter, the second output port of the controller 11 is connected with the second power conversion module 12 through the second drive adapter, and so on.

[0084] The embodiment realizes the connection between the controller 11 and the power conversion module 12 through the drive adapter, which can simplify the manufacturing process of the nuclear charging system.

[0085] Corresponding to the above nuclear charging system, the embodiment of the application further provides a control method applied to any one of the controllers in any one of the nuclear charging systems described above; see Figure 2 The control method comprises:

[0086] In S201, the controller outputs a driving signal for controlling a corresponding power conversion module.

[0087] In S202, when receiving a failure signal sent by any one of the other controllers and determining that the controller is a target controller according to a preset rule, the controller outputs a driving signal for controlling a target power conversion module; the target power conversion module is a power conversion module controlled by the failed controller.

[0088] For detailed description of the control method, refer to the foregoing description of the nuclear charging system, which will not be repeated here.

[0089] It should be understood that the sequence numbers of the steps in the above embodiments do not mean the execution sequence, and the execution sequence of the processes should be determined according to the functions and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0090] Corresponding to the above nuclear charging system, the embodiments of the present application also provide a nuclear charging parallel system, which comprises at least two nuclear charging systems as described above;

[0091] The output ends of the nuclear charging systems are connected in parallel; each controller included in each nuclear charging system is communicatively connected;

[0092] When at least one power conversion module in the nuclear charging parallel system fails, each controller in the nuclear charging parallel system communicates with each other to achieve current sharing control of the normally operating power conversion modules in the nuclear charging parallel system.

[0093] The embodiments of the present application can achieve current sharing control of the remaining normally operating power conversion modules when at least one power conversion module fails through the communication connection between the controllers, instead of directly shutting down the nuclear charging system with the failed power conversion module, which can reduce the stress borne by each power conversion module, avoid device damage, and further ensure power supply reliability.

[0094] Figure 3 is a schematic diagram of the controller provided by the embodiments of the present application. As shown in Figure 3 The controller 11 of the embodiments includes a processor 40 and a memory 41. The memory 41 is used to store a computer program 42, and the processor 40 is used to call and run the computer program 42 stored in the memory 41 to execute the steps in each of the above control method embodiments, such as Figure 2 S201 to S202 shown in

[0095] By way of example, the computer program 42 can be segmented into one or more modules / units that are stored in the memory 41 and executed by the processor 40 to accomplish the present application. The one or more modules / units can be a series of computer program instruction segments that accomplish a specific function and are used to describe the execution process of the computer program 42 in the controller 11.

[0096] The controller 11 can include, but is not limited to, the processor 40 and the memory 41. Those skilled in the art can understand that the controller 11 can include more or fewer components than those shown in the figure, or combine certain components, or include different components, for example, the controller can also include an input / output device, a network access device, a bus, etc. Figure 3 The controller 11 is merely an example and does not limit the controller 11, and can include more or fewer components than those shown in the figure, or combine certain components, or include different components, for example, the controller can also include an input / output device, a network access device, a bus, etc.

[0097] The processor 40 can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic components, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor.

[0098] The memory 41 can be an internal storage unit of the controller 11, such as a hard disk or a memory of the controller 11. The memory 41 can also be an external storage device of the controller 11, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the memory 41 can include both an internal storage unit and an external storage device of the controller 11. The memory 41 is used to store the computer program and other programs and data required by the controller. The memory 41 can also be used to temporarily store data that has been output or will be output.

[0099] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be realized in the form of hardware or software. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction, and do not limit the protection scope of the present application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiments, which will not be described here.

[0100] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in detail in a certain embodiment can be referred to the related description of other embodiments.

[0101] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. A person skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0102] In the embodiments provided by the present application, it should be understood that the disclosed system / controller and method can be implemented in other ways. For example, the above-described system / controller embodiments are only schematic. For example, the division of the modules or units is only a logical function division, and there can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection between each displayed or discussed unit can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or in other forms.

[0103] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0104] In addition, each function unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software function unit.

[0105] The integrated module / unit, if realized in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, all or part of the processes in the above-mentioned embodiment methods can also be completed by a computer program instructing related hardware, and the computer program can be stored in a computer readable storage medium. When the computer program is executed by a processor, the steps of each current flow control method embodiment can be implemented. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms. The computer readable medium can include any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc.

[0106] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A nuclear-grade charging system, characterized in that, It includes N controllers and N power conversion modules connected in parallel; each controller includes at least N output ports; N is a positive integer and N≥2; each controller can generate drive signals for controlling the N power conversion modules respectively, and output them through different output ports; when all N controllers are working normally, each controller only controls its corresponding power conversion module, and other power conversion modules are controlled by other corresponding controllers; for each controller, each output port of the controller is connected to the corresponding power conversion module; The I-th output port of the I-th controller is connected to the I-th power conversion module; the I-th output port of the I-th controller outputs a drive signal for controlling the I-th power conversion module; I is a positive integer, and 1≤I≤N; When K controllers fail and the remaining NK controllers are working normally, the K power conversion modules controlled by the K controllers are controlled by the NK controllers; K is a positive integer, and 1≤K≤N-1.

2. The nuclear-grade charging system according to claim 1, characterized in that, Communication connections between N controllers; When any controller detects its own failure, it sends a failure signal to all other controllers; this controller is used to control the target power conversion module. Upon receiving the failure signal, the controller determines the target controller according to a preset rule; The target controller controls its own output to control the drive signal of the target power conversion module.

3. The nuclear-grade charging system according to claim 1, characterized in that, Communication connections between N controllers; N controllers communicate with each other to achieve current sharing control of N power conversion modules.

4. The nuclear-grade charging system according to claim 1, characterized in that, It also includes at least two power supplies; Each power supply powers all N controllers.

5. The nuclear-grade charging system according to claim 4, characterized in that, The power supply includes a power adapter board and a power board; The first input terminal of the power adapter board is connected to an AC input source, the second input terminal of the power adapter board is connected to a DC input source, the output terminal of the power adapter board outputs a first DC current, the input terminal of the power board is connected to the output terminal of the power adapter board, and the output terminal of the power board outputs a second DC current, which is used to power the N controllers.

6. The nuclear-grade charging system according to claim 1, characterized in that, It also includes N driver adapter boards; The Lth output port of each controller is connected to the Lth power conversion module through the Lth drive adapter board; L is a positive integer, and 1≤L≤N.

7. A control method, characterized in that, The control method, applied to any one of the controllers in the nuclear-grade charging system as described in any one of claims 1 to 6, comprises: The control output is used to control the drive signal of the corresponding power conversion module; When a failure signal is received from any other controller and the controller is determined to be the target controller according to a preset rule, the controller outputs a drive signal to control the target power conversion module; the target power conversion module is the power conversion module controlled by the failed controller.

8. A nuclear-grade charging parallel system, characterized in that, Includes at least two nuclear-grade charging systems as described in any one of claims 1 to 6; The output terminals of each of the nuclear-level charging systems are connected in parallel; each controller included in each of the nuclear-level charging systems is communicatively connected. When at least one power conversion module in the nuclear-grade charging parallel system fails, the controllers in the nuclear-grade charging parallel system communicate with each other to achieve current sharing control of the normally operating power conversion modules in the nuclear-grade charging parallel system.

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