WO2021196627A1

WO2021196627A1 - Bidirectional converter-based forsmark effect suppression method and apparatus

Info

Publication number: WO2021196627A1
Application number: PCT/CN2020/128613
Authority: WO
Inventors: 杜伟; 杨文泉; 白秋梁; 陈志彬; 戴永辉
Original assignee: 科华恒盛股份有限公司; 漳州科华技术有限责任公司
Priority date: 2020-03-31
Filing date: 2020-11-13
Publication date: 2021-10-07
Also published as: CN111342502A; CN111342502B

Abstract

A bidirectional converter-based Forsmark effect suppression method and apparatus. A bidirectional converter is connected in parallel to a rectifier module in an electrical device, and the rectifier module is used for converting an alternating current inputted to the electrical device into a direct current, and outputting same to a direct current bus of the electrical device. Said method comprises: monitoring the voltage of a direct current bus of an electrical device (101); and if it is monitored that the voltage of the direct current bus is greater than a preset voltage threshold, controlling a bidirectional converter to enter a first working mode, wherein in the first working mode, the bidirectional converter is used for feeding the energy of the direct current bus of the electrical device back to an access power grid (102), thereby effectively suppressing the Forsmark effect, and guaranteeing the normal operation of a system.

Description

Forsmark effect suppression method and device based on bidirectional converter

The patent application of this application claims the priority of the Chinese patent application No. CN202010242764.7 filed on March 31, 2020. The disclosure of the earlier application is incorporated into this application by reference in its entirety.

Technical field

This application belongs to the field of power technology, and in particular relates to a method and device for suppressing the Forsmark effect based on a bidirectional converter.

Background technique

Forsmark effect refers to the phenomenon that the DC bus voltage fluctuates due to the sudden change of the surge voltage of the AC input to the grid, and its fluctuation range exceeds the tolerance range of the inverter's device performance, thereby causing the output AC voltage to be interrupted or abrupt.

The Forsmark effect phenomenon is widespread in the circuits of electrical equipment. Due to the sudden change of AC input to the grid (connected to the grid), the voltage is transmitted to the DC bus through the rectifier circuit, which causes the voltage of the DC bus to increase suddenly and exceeds the DC input of the inverter. The voltage point causes the output to power down. When the DC bus voltage suddenly increases, it may even cause damage to the IGBT tube of the inverter and affect the normal operation of the system.

technical problem

In view of this, the present application provides a method and device for suppressing the Forsmark effect based on a bidirectional converter to solve the problem of the Forsmark effect in the circuit of the electrical equipment caused by the sudden change of the AC input power grid.

Technical solutions

The first aspect of the application provides a Forsmark effect suppression method based on a bidirectional converter, the bidirectional converter is connected in parallel with a rectifier module in an electrical device, and the rectifier module is used to convert AC power input to the electrical device into DC power is output to the DC bus of the electrical equipment, and the suppression method includes:

Monitor the DC bus voltage of electrical equipment;

If it is monitored that the DC bus voltage is greater than a preset voltage threshold, controlling the bidirectional converter to enter the first working mode;

Wherein, in the first working mode, the bidirectional converter is used to feed back the energy of the DC bus of the rectifier module to the grid.

Based on the first aspect of the present application, in the first possible implementation manner of the first aspect, after the controlling the bidirectional converter to enter the first working mode, the method further includes:

If it is monitored that the DC bus voltage is not greater than the voltage threshold, the bidirectional converter is controlled to exit the first working mode.

Based on the first aspect of the present application or the first possible implementation manner of the first aspect, in a second possible implementation manner, the electrical device further includes an energy storage unit connected to the DC bus, and the rectifier module A charger with charging function is included, and the suppression method further includes:

Acquiring the working status of the charger;

Correspondingly, after the monitoring of the DC bus voltage of the electrical equipment, the method further includes:

If it is monitored that the DC bus voltage is not greater than the voltage threshold, the operating mode of the bidirectional converter is controlled based on the operating state of the charger.

Based on the second possible implementation manner of the first aspect of the present application, in a third possible implementation manner, the controlling the working mode of the bidirectional converter based on the working state of the charger includes:

If the working state of the charger is a non-fault state, controlling the two-way converter to enter the second working mode;

Wherein, in the second working mode, the bidirectional converter is on standby.

Based on the second possible implementation manner of the first aspect of the present application, in the fourth possible implementation manner, the controlling the working mode of the bidirectional converter based on the working state of the charger further includes:

If the working state of the charger is a fault state, controlling the two-way converter to enter the third working mode;

Wherein, in the third working mode, the bidirectional converter is used to convert and output the grid voltage to the load of the electrical device, and to charge the energy storage unit of the electrical device.

The second aspect of the present application provides a Forsmark effect suppression device based on a bidirectional converter, the bidirectional converter is connected in parallel with a rectifier module in an electrical device, and the rectifier module is used to convert AC power input to the electrical device into DC power is output to the DC bus of the electrical equipment, and the suppression device includes:

A monitoring unit for monitoring the DC bus voltage of the electrical equipment;

A control unit, configured to control the bidirectional converter to enter the first working mode when the monitored DC bus voltage is greater than a preset voltage threshold;

Wherein, in the first working mode, the bidirectional converter is used to feed back the energy of the DC bus of the electrical equipment to the grid.

Based on the second aspect of the present application, in the first possible implementation manner of the second aspect, the control unit is further configured to control the bidirectional voltage when the monitored DC bus voltage is not greater than the voltage threshold. The converter exits the first working mode.

Based on the second aspect of the present application or the first possible implementation manner of the second aspect, in a second possible implementation manner, the electrical device further includes an energy storage unit connected to the DC bus, and the rectifier module A charger with charging function is included, and the suppression device further includes:

A status acquiring unit, configured to acquire the working status of the charger;

Correspondingly, the control unit is further configured to, when the monitored DC bus voltage is not greater than the voltage threshold, control the working mode of the bidirectional converter based on the working state of the charger.

Based on the second possible implementation manner of the second aspect of the present application, in the third possible implementation manner, the control unit is further configured to, if the working state of the charger is a non-fault state, control the bidirectional The converter enters the second working mode; wherein, in the second working mode, the bidirectional converter is on standby.

Based on the second possible implementation manner of the second aspect of the present application, in the fourth possible implementation manner, the control unit is further configured to, if the working state of the charger is a fault state, control the two-way conversion The device enters the third working mode; wherein, in the third working mode, the two-way converter is used to convert the voltage connected to the grid and output to the load of the electrical device, and to transfer the voltage to the electrical device The energy storage unit is charged.

The third aspect of the present application provides a terminal. The terminal includes a memory, a processor, and a computer program that is stored in the memory and can run on the processor. The processor executes the computer program when the computer program is executed. The steps of the method for suppressing the Forsmark effect based on the bidirectional converter as described above in the first aspect of the present application are the same.

The fourth aspect of the embodiments of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it implements any of the above-mentioned first aspects of the present application The steps of the Forsmark effect suppression method based on the bidirectional converter.

Beneficial effect

This application monitors the DC bus voltage of the electrical equipment, and when it is monitored that the DC bus voltage is greater than a preset voltage threshold, the two-way converter is controlled to enter the first working mode, wherein, in the first working mode, all The bidirectional converter is used to feed back the energy of the DC bus of the electrical equipment to the grid. This application presets a voltage threshold that reflects the sudden increase of the DC bus voltage. When it is monitored that the DC bus voltage is greater than the threshold, it means that the voltage of the AC input grid (connected to the grid) has a sudden change, and the DC bus voltage suddenly increases beyond the limit. At this time, the energy of the DC bus is fed back to the grid through the bidirectional converter, thereby suppressing the Forsmark effect and ensuring the normal operation of the system.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only of the present application. For some embodiments, for those of ordinary skill in the art, other drawings may be obtained based on these drawings without creative labor.

FIG. 1 is an implementation flowchart of a Forsmark effect suppression method based on a bidirectional converter provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of the work flow when the bidirectional converter provided by the embodiment of the present application enters the first working mode;

FIG. 3 is a schematic diagram of the internal structure of a bidirectional converter provided by an embodiment of the present application;

FIG. 4 is an implementation flowchart of a possible implementation manner of the Forsmark effect suppression method based on the bidirectional converter provided by the embodiment of the present application;

FIG. 5 is a schematic diagram of a working flow of the bidirectional converter provided in an embodiment of the present application entering the second working mode;

FIG. 6 is a schematic diagram of the work flow when the bidirectional converter provided by the embodiment of the present application enters the third working mode;

FIG. 7 is a schematic structural diagram of a Forsmark effect suppression device based on a bidirectional converter provided by an embodiment of the present application;

Fig. 8 is a schematic diagram of a terminal provided by an embodiment of the present application.

Embodiments of the present invention

In the following description, for the purpose of illustration rather than limitation, specific details such as a specific system structure and technology are proposed for a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from obstructing the description of this application.

In order to make the objectives, technical solutions, and advantages of the present application clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

In the embodiments of the present application, electrical equipment refers to a DC bus configured with a DC bus and a rectifier module. The rectifier module is used to convert AC power input to the electrical equipment (which can be input from the grid) into DC power and output to the electrical equipment. device of.

In the embodiment of the present application, a bidirectional converter can be provided in parallel for the rectifier module of the electrical device, and the energy conversion between the DC bus of the electrical device and the grid connected to the electrical device can be realized through the control of the bidirectional converter, so as to suppress the possible occurrence of the electrical device Forsmark effect.

In some other application scenarios, such as when applied to nuclear power plants, electrical equipment is usually equipped with energy storage units (such as battery packs), and the rectifier module is usually a charger with rectification and charging functions, or it may be configured for chargers. A two-way converter is used for the maintenance and quick repair of the battery pack. For example, in the overhaul or inspection every two to three years, the charger is powered off, the two-way converter is enabled to perform the discharge test on the battery pack, and the pre-charge is performed after the test is completed To fully charge the battery, in this application scenario, the bidirectional converter will only be activated during the overhaul or inspection every two to three years. Therefore, the utilization rate of the bidirectional converter is very low and the economic benefits are not high.

Referring to FIG. 1, it shows a flow chart of the implementation of the method for suppressing the Forsmark effect based on a bidirectional converter provided by an embodiment of the present application, which is described in detail as follows:

Step 101: Monitor the DC bus voltage of the electrical equipment.

In electrical equipment, the alternating current connected to the grid is rectified by the rectifier module and then input to the DC bus. According to the voltage situation of the DC bus, it can be judged whether the Forsmark effect phenomenon has occurred; Whether the phenomenon occurs, in order to take countermeasures, this application conducts real-time monitoring of the voltage situation of the DC bus of electrical equipment.

Step 102: If it is monitored that the DC bus voltage is greater than a preset voltage threshold, control the bidirectional converter to enter the first working mode;

In the embodiments of the present application, according to the change law of the voltage on the DC bus when the Forsmark effect occurs, the present application can preset a voltage threshold that reflects the sudden increase of the DC bus voltage. When the system monitors the DC bus voltage of the electrical equipment When it is greater than the preset voltage threshold, it indicates that the grid voltage has exceeded the limit, that is, the Forsmark effect is generated in the electrical equipment circuit. At this time, the control system controls the bidirectional converter to enter the first working mode.

The working process of the bidirectional converter in the first working mode is shown in Figure 2: In the first working mode, the rectifier module 21 maintains a normal working state, that is, rectifies and converts the AC power input from the grid into The direct current energy is input to the direct current bus to supply power to the load 23, and the bidirectional converter 22 inverts the direct current energy of the direct current bus into alternating current energy and feeds it back to the grid to reduce the voltage of the direct current bus.

In the embodiment of the present application, the load 23 can be a DC load or an AC load. If it is a DC load, it can be directly connected to the DC bus of electrical equipment; if it is an AC load, it can be connected to the electrical equipment through an inverter module. The DC bus of the device.

In an embodiment, as shown in FIG. 3, it shows an internal structure and working principle of the bidirectional converter: in this embodiment, the bidirectional converter may include a DC terminal 31, a three-phase half-bridge topology 32, The three-phase isolation step-up transformer 33, the three-phase LC filter 34, the three-phase power grid 35, the first sampling module 36, the control system 37 and the second sampling module 38; wherein the first sampling module 36 collects the voltage and the DC terminal 31 The current is transmitted to the control system 37, and the second sampling module 38 collects the three-phase power grid 35 and the voltage and current filtered by the three-phase LC filter 34 and transmits them to the control system 37, which is used to achieve grid-connected tracking and grid-connection. Power control; since one end of the bidirectional converter is connected to the DC terminal 31 and the other end is connected to the three-phase grid terminal 35, the control system 37 can control the topological structure of the three-phase half-bridge topology 32 to transfer the direct current energy of the DC terminal 31 through the three-phase half-bridge Topology 32, three-phase isolation step-up transformer 33 and three-phase LC filter 34 are inverted into AC power and fed back to three-phase power grid 35; or the AC power of three-phase power grid 35 is boosted by three-phase LC filter 34 and three-phase isolation The transformer 33 and the three-phase half-bridge topology 32 are converted into DC power and input to the DC bus of the DC terminal 31.

Optionally, after the foregoing step 102, it may further include:

Since the bidirectional converter is in the first working mode, it will continue to feed back the energy of the DC bus of the electrical equipment to the grid. After the Forsmark effect is suppressed, if the first working mode is maintained, the DC bus voltage will be lower than the normal value. , Affect the normal operation of the system, and cause unnecessary energy loss. Therefore, in the embodiment of the present application, after controlling the bidirectional converter to work in the first mode, if the monitoring module detects that the DC bus voltage is not greater than the voltage threshold, the bidirectional converter is controlled to exit the In the first working mode, after the bidirectional converter exits the first working mode, it can be in a standby state.

In an embodiment, the above-mentioned electrical equipment may further include an energy storage unit connected to the DC bus, and the above-mentioned rectifier module may include a charger with a charging function. Referring to FIG. 4, the above-mentioned Forsmark effect suppression method based on a bidirectional converter It can also include:

Step 100: Obtain the working status of the charger.

In the embodiment of the present application, the electrical equipment may include an energy storage unit, and correspondingly, the rectifier module may be a charger. The working state of the charger may include a fault state and a non-fault state. The fault state refers to a state in which the charger fails and stops normal operation, and the non-fault state refers to the state when the charger is working normally.

Correspondingly, after the above step 101, it may further include:

Step 103: If it is monitored that the DC bus voltage is not greater than the voltage threshold, control the working mode of the bidirectional converter based on the working state of the charger.

If the charger fails during use, it may cause the entire electrical equipment to crash. The embodiment of this application can set different working modes for the working state of the charger, so that when the charger fails, the bidirectional converter can be used as The backup device performs the original function of the charger to ensure the normal operation of the electrical equipment.

Optionally, in the foregoing step 103, the controlling the working mode of the bidirectional converter based on the working state of the charger may include:

Wherein, in the second working mode, the bidirectional converter is on standby.

When the DC bus voltage monitored by the monitoring module is not greater than the preset voltage threshold, and the working state of the charger is non-faulty, it means that neither the Forsmark effect nor the charger has malfunctioned. At this time, the control system controls two-way conversion. The device works in the second working mode, that is, in the standby state.

For the working process of the bidirectional converter in the second working mode, refer to Figure 5: In the second working mode, the charger 51 maintains a normal working state, rectifies the AC power input from the grid into DC power and inputs it to the DC On the one hand, the energy of the bus bar and the DC bus bar supplies power to the load 23, and on the other hand charges the energy storage unit 54 of the electrical equipment, and the bidirectional converter 22 is in a standby state to save energy consumption.

In the embodiment of the present application, when the working state of the charger is a fault state, the bidirectional converter can be controlled to enter the third working mode to perform the function of the charger and ensure the normal operation of the electrical equipment.

The working flow of the bidirectional converter in the third working mode can be referred to Fig. 6: Since the charger 51 is connected in parallel with the bidirectional converter 22, and the bidirectional converter has the function of rectifying the current, the bidirectional converter can replace the charger. Its function in the electrical equipment circuit; in the third operating mode, the bidirectional converter 22 replaces the charger 51, converts the AC energy connected to the grid into DC energy and outputs it to the DC bus. The DC bus energy is on the one hand Supplying power to the load 23, on the other hand, charging the energy storage unit 54, to ensure the normal operation of the electrical equipment system, and also improve the efficiency of the bidirectional converter, and improve economic benefits.

It can be seen from the above that this application monitors the DC bus voltage of the electrical equipment, and when the monitored DC bus voltage is greater than the preset voltage threshold, the bidirectional converter can be controlled to feed back the energy of the DC bus of the electrical equipment Connecting back to the grid effectively suppresses the Forsmark effect, and when the charger of the electrical equipment fails, the bidirectional converter can be controlled to replace the charger to ensure the normal operation of the system and at the same time improve the efficiency of the bidirectional converter. Improve economic efficiency.

It should be understood that the size of the sequence number of each step in the foregoing embodiment does not mean the order of execution. The execution sequence of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

The following are device embodiments of the application. For details that are not described in detail, reference may be made to the corresponding method embodiments above.

FIG. 7 shows a schematic structural diagram of a Forsmark effect suppression device based on a bidirectional converter provided by an embodiment of the present application. For ease of description, only the parts related to the embodiment of the present application are shown, and the details are as follows:

As shown in FIG. 7, the Forsmark effect suppression device 7 based on the bidirectional converter includes: a monitoring unit 71 and a control unit 72.

The monitoring unit 71 is used to monitor the DC bus voltage of the electrical equipment;

In the embodiment of the present application, the bidirectional converter is connected in parallel with the rectifier module in the electrical device, and the rectifier module is used to convert AC power input to the electrical device into DC power and output to the DC bus of the electrical device.

The control unit 72 is configured to control the bidirectional converter to enter the first working mode when the monitored DC bus voltage is greater than a preset voltage threshold;

Optionally, the control unit 72 is further configured to control the bidirectional converter to exit the first working mode when the monitored DC bus voltage is not greater than the voltage threshold.

Optionally, the electrical equipment further includes an energy storage unit connected to the DC bus, the rectifier module includes a charger with a charging function, and correspondingly, the Forsmark effect suppression device 7 based on a bidirectional converter further includes:

Correspondingly, the control unit 72 is further configured to, when the monitored DC bus voltage is not greater than the voltage threshold, control the working mode of the bidirectional converter based on the working state of the charger.

Optionally, the control unit 72 is further configured to, if the working state of the charger is a non-fault state, control the two-way converter to enter the second working mode; wherein, in the second working mode, the The bidirectional converter is on standby.

Optionally, the control unit 72 is further configured to, if the working state of the charger is a fault state, control the two-way converter to enter a third working mode; wherein, in the third working mode, the two-way The converter is used to convert and output the voltage connected to the grid to the load of the electrical equipment, and to charge the energy storage unit of the electrical equipment.

It can be seen from the above that this application monitors the DC bus voltage of the electrical equipment, and when the monitored DC bus voltage is greater than a preset voltage threshold, the bidirectional converter is controlled to feed back the energy of the DC bus of the electrical equipment It is connected to the power grid without being restricted by the output load, effectively suppressing the Forsmark effect phenomenon, and when the charger of the electrical equipment fails, the bidirectional converter can be controlled to replace the charger to ensure the normal operation of the system, and at the same time improve the bidirectional The use efficiency of the converter improves the economic benefit.

Fig. 8 is a schematic diagram of a terminal provided by an embodiment of the present application. As shown in FIG. 8, the terminal 8 of this embodiment includes a processor 81, a memory 82, and a computer program 83 that is stored in the memory 82 and can run on the processor 81. When the processor 81 executes the computer program 83, the steps in the foregoing embodiments of the Forsmark effect suppression method based on bidirectional converters are implemented, for example, steps 101 to 102 shown in FIG. 1 and steps 100 to 100 shown in FIG. Step 103. Alternatively, when the processor 81 executes the computer program 83, the functions of the units in the foregoing device embodiments, for example, the functions of the units 81 to 82 shown in FIG. 8 are realized.

Exemplarily, the computer program 703 may be divided into one or more units, and the one or more units are stored in the memory 702 and executed by the processor 701 to complete the application. The one or more units may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program 703 in the terminal 7. For example, the computer program 703 can be divided into a monitoring unit and a control unit. The specific functions of each unit are as follows:

Monitoring unit, used to monitor the DC bus voltage of electrical equipment;

The terminal 7 may be a computing device such as a desktop computer, a notebook, a palmtop computer, and a cloud server. The terminal 7 may include, but is not limited to, a processor 701 and a memory 702. Those skilled in the art can understand that FIG. 7 is only an example of the terminal 7 and does not constitute a limitation on the terminal 7. It may include more or less components than those shown in the figure, or a combination of certain components, or different components, such as The terminal may also include input and output devices, network access devices, buses, and so on.

The so-called processor 701 may be a central processing unit (Central Processing Unit, CPU), other general-purpose processors, digital signal processors (Digital Signal Processor, DSP), and application specific integrated circuits (Application Specific Integrated Circuits). Integrated Circuit, ASIC), Field Programmable Gate Array (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

The memory 702 may be an internal storage unit of the terminal 7, such as a hard disk or a memory of the terminal 7. The memory 702 may also be an external storage device of the terminal 7, such as a plug-in hard disk equipped on the terminal 7, a smart memory card (Smart Media Card, SMC), or a Secure Digital (SD) card, Flash Card, etc. Further, the memory 702 may also include both an internal storage unit of the terminal 7 and an external storage device. The memory 702 is used to store the computer program and other programs and data required by the terminal. The memory 702 can also be used to temporarily store data that has been output or will be output.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, only the division of the above functional units and modules is used as an example. In practical applications, the above functions can be allocated to different functional units and modules as needed. Module completion, 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. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist alone physically, or two or more units can be integrated into one unit. The above-mentioned integrated units can be hardware-based Formal realization can also be realized in the form of a software functional unit. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the present application. For the specific working process of the units and modules in the foregoing system, reference may be made to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the above-mentioned embodiments, the description of each embodiment has its own focus. For parts that are not described in detail or recorded in an embodiment, reference may be made to related descriptions of other embodiments.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

In the embodiments provided in this application, it should be understood that the disclosed device/terminal and method may be implemented in other ways. For example, the device/terminal embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or Components can be combined or integrated into another system, or some features can be omitted or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

If the integrated module/unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiments and methods, and can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the program is executed by the processor, it can implement the steps of the foregoing method embodiments. Wherein, the computer program includes computer program code, and the computer program code may be in the form of source code, object code, executable file, or some intermediate forms. The computer-readable medium may 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, Read-Only Memory) , Random Access Memory (RAM, Random Access Memory), electrical carrier signal, telecommunications signal, and software distribution media, etc. It should be noted that the content contained in the computer-readable medium can be appropriately added or deleted according to the requirements of the legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to the legislation and patent practice, the computer-readable medium Does not include electrical carrier signals and telecommunication signals.

The above-mentioned embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, a person of ordinary skill in the art should understand that it can still implement the foregoing The technical solutions recorded in the examples are modified, or some of the technical features are equivalently replaced; these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the application, and should be included in Within the scope of protection of this application.

Claims

A method for suppressing the Forsmark effect based on a bidirectional converter is characterized in that the bidirectional converter is connected in parallel with a rectifier module in an electrical device, and the rectifier module is used to convert alternating current input to the electrical device into direct current and output to The DC bus of the electrical equipment;

The suppression method includes:

Monitoring the DC bus voltage of the electrical equipment;

If it is monitored that the DC bus voltage is greater than a preset voltage threshold, controlling the bidirectional converter to enter the first working mode;

Wherein, in the first working mode, the bidirectional converter is used to feed back the energy of the DC bus of the electrical equipment to the grid.
The method for suppressing the Forsmark effect based on the bidirectional converter according to claim 1, wherein after controlling the bidirectional converter to enter the first working mode, the method further comprises:

If it is monitored that the DC bus voltage is not greater than the voltage threshold, the bidirectional converter is controlled to exit the first working mode.
The method for suppressing the Forsmark effect based on the bidirectional converter according to claim 1 or 2, wherein the electrical equipment further includes an energy storage unit connected to the DC bus, and the rectifier module includes a charging function For the charger, the suppression method further includes:

Acquiring the working status of the charger;

Correspondingly, after the monitoring of the DC bus voltage of the electrical equipment, the method further includes:

If it is monitored that the DC bus voltage is not greater than the voltage threshold, the operating mode of the bidirectional converter is controlled based on the operating state of the charger.
The Forsmark effect suppression method based on the bidirectional converter according to claim 3, wherein the controlling the working mode of the bidirectional converter based on the working state of the charger comprises:

If the working state of the charger is a non-fault state, controlling the two-way converter to enter the second working mode;

Wherein, in the second working mode, the bidirectional converter is on standby.
The Forsmark effect suppression method based on the bidirectional converter according to claim 3, wherein the controlling the working mode of the bidirectional converter based on the working state of the charger comprises:

If the working state of the charger is a fault state, controlling the two-way converter to enter the third working mode;

Wherein, in the third working mode, the bidirectional converter is used to convert and output the voltage connected to the power grid to the load of the electrical device, and to charge the energy storage unit of the electrical device.
A Forsmark effect suppression device based on a bidirectional converter is characterized in that the bidirectional converter is connected in parallel with a rectifier module in an electrical device, and the rectifier module is used to convert alternating current input to the electrical device into direct current and output to For the DC bus of the electrical equipment, the suppression device includes:

A monitoring unit for monitoring the DC bus voltage of the electrical equipment;

A control unit, configured to control the bidirectional converter to enter the first working mode when the monitored DC bus voltage is greater than a preset voltage threshold;

Wherein, in the first working mode, the bidirectional converter is used to feed back the energy of the DC bus of the electrical equipment to the grid.
The Forsmark effect suppression device based on a bidirectional converter according to claim 6, wherein the control unit is further configured to, when the monitored DC bus voltage is not greater than the voltage threshold, control the bidirectional The converter exits the first working mode.
The Forsmark effect suppression device based on the bidirectional converter according to claim 6 or 7, wherein the electrical equipment further includes an energy storage unit connected to the DC bus, and the rectifier module includes a charging function For the charger, the control device further includes:

A status acquiring unit, configured to acquire the working status of the charger;

Correspondingly, the control unit is further configured to, when the monitored DC bus voltage is not greater than the voltage threshold, control the working mode of the bidirectional converter based on the working state of the charger.
A terminal comprising a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the computer program as claimed in claims 1 to 5 Any of the steps of the Forsmark effect suppression method based on the bidirectional converter.
A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, wherein the computer program, when executed by a processor, implements the bidirectional converter-based The steps of the Forsmark effect suppression method.