Control method of direct current inversion loop and related device

Abstract

The invention discloses a control method and a control device of a direct-current inverter loop, inverter loop control equipment and a computer readable storage medium. The method comprises the following steps that: power supply control equipment starts a double-inverter alternate switching working mode; switching judgment processing is carried out based on the acquired running state data of the direct-current inverter loop, and a current inverter object is obtained; wherein the direct-current inverter loop is provided with a double-inverter circuit; when the current inverter object is a first inverter, sending a control signal to access a control loop of the first inverter into an inverter loop; and when the current inverter object is the second inverter, sending a control signal to access the control loop of the second inverter into the inverter loop. The reliability of an inversion loop of a single inverter is improved, and the problem that power cannot be supplied due to faults of the inverter is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of power equipment, and more specifically, relates to a control method and a control device for a DC inverter circuit, an inverter circuit control device, and a computer-readable storage medium. Background Art

[0002] In substations, especially switch stations with voltage levels of 330 kV and above where the external power supply is unstable, an uninterruptible power supply (UPS) system is usually used to ensure continuous power supply to equipment.

[0003] In the related art, most widely used UPS systems adopt a single inverter working mode. However, during the operation of the single inverter system, since it only relies on a single inverter for power conversion, once the inverter fails, the entire UPS system will lose its inverter function, resulting in it having to rely on a bypass power supply for power supply, which greatly reduces the reliability of power supply. Secondly, due to the unstable power supply of the substation, the battery packs in the station are often seriously aged, especially the aging degree of different battery packs is different, resulting in uneven power supply performance. When the AC power supply is interrupted, the difference in the power supply capacity of the battery pack may further aggravate the instability of the power supply. In addition, the current single inverter system fails to fully utilize the advantages of the dual DC system in the substation, resulting in waste of resources and reduced power supply efficiency.

[0004] Therefore, how to improve the reliability of the inverter circuit of a single inverter and avoid the problem of power failure due to inverter failure is a key issue that technicians in this field are concerned about. Summary of the invention

[0005] The purpose of the present application is to provide a control method, a control device, an inverter circuit control device and a computer-readable storage medium for a DC inverter circuit to improve the reliability of the inverter circuit of a single inverter and avoid the problem of power failure due to inverter failure.

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a control method for a DC inverter circuit, comprising:

[0007] The power control device starts the dual inverter rotation switching working mode;

[0008] Performing switching judgment processing based on the acquired operating status data of the DC inverter circuit to obtain the current inverter object; wherein the DC inverter circuit is provided with a dual inverter circuit;

[0009] When the current inverter object is the first inverter, sending a control signal to connect the control loop of the first inverter to the inverter loop;

[0010] When the current inverter object is the second inverter, a control signal is sent to connect the control loop of the second inverter to the inverter loop.

[0011] Optionally, switching judgment processing is performed based on the acquired operating status data of the DC inverter circuit to obtain a current inverter object, including:

[0012] Acquiring operating status data in the DC inverter circuit;

[0013] Reasoning the operating status data based on an inverter switching model to obtain a current inverter object;

[0014] The inverter switching model is obtained by model training based on historical operating status data.

[0015] Optionally, switching judgment processing is performed based on the acquired operating status data of the DC inverter circuit to obtain a current inverter object, including:

[0016] Acquiring operating status data in the DC inverter circuit;

[0017] Determining whether the inverter is currently in a long-term working state based on the operating state data;

[0018] If so, another inverter is used as the current inverter object.

[0019] Optionally, also include:

[0020] Performing battery life monitoring on multiple batteries of the DC inverter circuit to obtain battery life data of each battery;

[0021] The power supply load distribution ratio is adjusted based on the battery life data of each of the storage batteries.

[0022] Optionally, also include:

[0023] The power control device performs phase tracking processing to obtain a phase tracking result;

[0024] A phase adjustment is performed based on the phase tracking result.

[0025] Optionally, also include:

[0026] The power supply control device performs automatic inspection processing according to a preset plan.

[0027] Optionally, the DC inverter circuit includes: two DC power supply interfaces, one 380V AC mains power supply interface, one 220V AC working bypass power supply interface, and one 220V AC maintenance bypass power supply interface.

[0028] The present application also provides a control device for a DC inverter circuit, comprising:

[0029] Working mode switching module, used to start dual inverter wheel switching working mode;

[0030] A switching judgment module, used to perform switching judgment processing based on the acquired operating status data of the DC inverter circuit to obtain a current inverter object; wherein the DC inverter circuit is provided with a dual inverter circuit;

[0031] A first inverter access module, used for sending a control signal to access the control loop of the first inverter into the inverter loop when the current inverter object is the first inverter;

[0032] The second inverter access module is used to send a control signal to access the control loop of the second inverter into the inverter loop when the current inverter object is the second inverter.

[0033] The present application also provides an inverter circuit control device, comprising:

[0034] Memory for storing computer programs;

[0035] A processor is used to implement the steps of the control method described above when executing the computer program.

[0036] The present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the control method described above are implemented.

[0037] A control method for a DC inverter circuit provided in the present application includes: a power supply control device starts a dual inverter wheel switching working mode; a switching judgment process is performed based on the acquired operating status data of the DC inverter circuit to obtain a current inverter object; wherein the DC inverter circuit is provided with a dual inverter circuit; when the current inverter object is a first inverter, a control signal is sent to connect the control circuit of the first inverter to the inverter circuit; when the current inverter object is a second inverter, a control signal is sent to connect the control circuit of the second inverter to the inverter circuit.

[0038] It has the following beneficial effects:

[0039] The dual inverters are switched by power control equipment. When the current inverter fails or operates abnormally, the system will automatically switch to another inverter to work. The switching mechanism not only improves the fault tolerance of the inverter circuit, but also reduces the downtime of the system, thereby greatly improving the reliability and stability of the entire system. The introduction of this control method effectively avoids the negative impact of a single inverter failure on the system operation and ensures the efficient operation of the DC inverter circuit under various working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0041] Figure 1 A flow chart of a control method for a DC inverter circuit provided in an embodiment of the present application;

[0042] Figure 2 A schematic diagram of the structure of a DC inverter circuit provided in an embodiment of the present application;

[0043] Figure 3 A schematic diagram of the structure of a control device for a DC inverter circuit provided in an embodiment of the present application;

[0044] Figure 4 A schematic diagram of the structure of the inverter circuit control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] The core of the present application is to provide a control method, a control device, an inverter circuit control device and a computer-readable storage medium for a DC inverter circuit to improve the reliability of the inverter circuit of a single inverter and avoid the problem of power failure due to inverter failure.

[0046] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] A control method for a DC inverter circuit provided by the present application is described below through an embodiment.

[0048] Please refer to Figure 1 , Figure 1 A flow chart of a control method for a DC inverter circuit provided in an embodiment of the present application.

[0049] In this embodiment, the method may include:

[0050] S101, the power control device starts the dual inverter rotation switching working mode;

[0051] This step is to enable the power control device to start the dual inverter rotation switching working mode. The power control device manages the working status of the dual inverters to ensure that the two inverters are used alternately.

[0052] The power control device issues commands to control the inverter's wheel-cutting working mode, that is, to make the two inverters work alternately according to preset time or conditions, which can balance the usage frequency of the two inverters, extend their service life, and reduce excessive wear of a single inverter.

[0053] S102, performing switching judgment processing based on the acquired operating status data of the DC inverter circuit to obtain a current inverter object; wherein the DC inverter circuit is provided with a dual inverter circuit;

[0054] Based on S101, this step aims to perform switching judgment processing based on the acquired operating status data of the DC inverter circuit to obtain the current inverter object; wherein the DC inverter circuit is provided with a dual inverter circuit. By real-time monitoring of the operating status data, the system can decide which inverter should be connected to work at present. Analyze the collected data, such as current, voltage, load conditions, usage time, battery health, etc., and make judgments based on these data. Improve the adaptability and response speed of the system, so that the inverter can operate in the best state, and improve the efficiency and stability of the overall system.

[0055] Furthermore, this step may include:

[0056] Step 1, obtaining operating status data in a DC inverter circuit;

[0057] Step 2: Inferring the operating status data based on the inverter switching model to obtain the current inverter object; wherein the inverter switching model is obtained by model training based on historical operating status data.

[0058] Among them, the switching judgment of the inverter is performed based on the acquired operating status data of the DC inverter circuit. The working status of the inverter will affect its performance and life, so it is very important to monitor and evaluate it in real time. Through the acquired operating status data and the inverter switching model, the system can judge the current inverter state. First, the system will obtain the operating status data in the DC inverter circuit. It can include current, voltage, temperature, battery life, and inverter working time. Then, the inverter switching model is used to infer these data. The inverter switching model is trained based on historical operating data and is used to predict and evaluate the current inverter state. Finally, the results obtained by reasoning will help determine the current inverter object and ensure the reliable operation of the inverter. In this way, dynamic management and optimization of the inverter can be achieved, the risk of failure can be reduced, and the reliability of the system can be improved. Reasoning based on the model trained based on historical data can improve the accuracy of judgment, enable the system to better adapt to different operating states, and improve the overall performance and life of the inverter.

[0059] Furthermore, this step may include:

[0060] Step 1, obtaining operating status data in a DC inverter circuit;

[0061] Step 2: judging whether the current inverter is in a long-term working state based on the operating state data;

[0062] Step 3: If yes, use another inverter as the current inverter object.

[0063] In this optional solution, the operating status data of the DC inverter circuit is used to determine the working status of the inverter, especially the long-term working status. The long-term working state may cause the inverter to overheat or accelerate the loss, so the inverter needs to be switched to maintain the stability and efficiency of the system. The system will first obtain the operating status data in the DC inverter circuit, and then analyze the data to determine whether the current inverter is in a long-term working state. If the judgment result is yes, the system will switch another inverter to the current inverter object, thereby avoiding excessive work and potential overheating problems of a single inverter. The load of the inverter can be effectively balanced, and the long-term operation pressure of a single inverter can be reduced, thereby reducing the failure rate and maintenance cost. By extending the working life of each inverter, the overall reliability and operating efficiency of the system are improved, and the problem of failure of a single inverter to supply power is avoided.

[0064] S103, when the current inverter object is the first inverter, sending a control signal to connect the control loop of the first inverter to the inverter loop;

[0065] Based on S102, this step ensures that the first inverter can directly participate in the control of the inverter circuit when necessary. The system sends a specific control signal to connect the control circuit of the first inverter to the inverter circuit to achieve power conversion, ensuring that when the first inverter is working, the system can effectively utilize its function to ensure the stability and efficiency of power conversion.

[0066] S104: When the current inverter object is the second inverter, send a control signal to connect the control loop of the second inverter to the inverter loop.

[0067] On the basis of S102, it is ensured that the second inverter can participate in the control when needed. The system sends a control signal according to the judgment result, so that the control circuit of the second inverter is connected to the inverter circuit, which optimises the use of the inverter and ensures that when the second inverter needs to work, the system can smoothly convert power, thereby improving the flexibility and reliability of the system.

[0068] In summary, this embodiment realizes the rotation switching of dual inverters through the power control device. When the current inverter object fails or operates abnormally, the system will automatically switch to another inverter to work. The switching mechanism not only improves the fault tolerance of the inverter circuit, but also reduces the downtime of the system, thereby greatly improving the reliability and stability of the entire system. The introduction of this control method effectively avoids the negative impact of a single inverter failure on the system operation and ensures the efficient operation of the DC inverter circuit under various working conditions.

[0069] Optionally, this embodiment may further include:

[0070] The battery life of multiple batteries in the DC inverter circuit is monitored to obtain the battery life data of each battery; and the power supply load distribution ratio is adjusted based on the battery life data of each battery.

[0071] It can be seen that in this optional solution, battery life monitoring of multiple batteries is performed, and the power supply load distribution ratio is adjusted according to the monitoring results, which can ensure that the batteries operate in the best state and avoid power supply instability or system failure due to battery aging.

[0072] Specifically, the battery life of multiple batteries in the DC inverter circuit is monitored to obtain the battery life data of each battery. Based on this data, the system will adjust the distribution ratio of the power supply load to optimize the battery efficiency and extend the service life of the overall system. This adjustment can be achieved by optimizing the load distribution strategy or adjusting the operating mode. By monitoring the battery life and dynamically adjusting the load distribution, the risk of excessive use and premature failure of the battery can be reduced, and the stability and reliability of the system can be improved. At the same time, this approach can also improve the energy efficiency and economy of the system.

[0073] Optionally, this embodiment may further include:

[0074] The power control device performs phase tracking processing to obtain a phase tracking result; and performs phase adjustment based on the phase tracking result.

[0075] This optional solution involves phase tracking and adjustment of the power control device. Phase tracking is to ensure that the phase of the power system matches the actual load and optimize the performance and stability of the power system.

[0076] The power control device first performs phase tracking processing to obtain phase tracking results. The system then adjusts the phase of the power supply based on these results. This can optimize the operating state of the system by adjusting the phase of the power supply to make it more compatible with the load requirements. Phase tracking and adjustment can improve the power quality of the power supply system and reduce energy efficiency losses and equipment failures caused by phase mismatch. At the same time, it improves the operating stability and reliability of the system, helping to maintain efficient and stable power supply.

[0077] Optionally, this embodiment may further include:

[0078] The power control equipment performs automatic inspections according to the preset plan.

[0079] This option involves automatic inspection of the power control device. Automatic inspection ensures that all components of the system are working properly and detects and handles potential problems in a timely manner. The power control device performs automatic inspections according to a preset plan. This includes regular checks of various equipment indicators such as voltage, current, temperature, etc. to ensure the normal operation of the system. The inspection results are used to detect equipment failures, performance degradation or other abnormal conditions, and take appropriate measures to repair or adjust them. Automatic inspection can improve the maintenance efficiency of the system, reduce the need for manual inspections, and detect and handle equipment problems in a timely manner, thereby improving the stability and reliability of the system. Inspections through preset plans can also ensure that the system is running in an optimal state and reduce unexpected failures and downtime.

[0080] Please refer to Figure 2 , Figure 2 A schematic diagram of the structure of a DC inverter circuit provided in an embodiment of the present application.

[0081] Optionally, the DC inverter circuit of this embodiment includes: two DC power supply interfaces, one 380V AC mains power supply interface, one 220V AC working bypass power supply interface, and one 220V AC maintenance bypass power supply interface.

[0082] In this optional solution, the DC inverter circuit is the circuit of the uninterruptible power supply device, which defines the composition of the DC inverter circuit, including multiple power supply interfaces. These interfaces ensure that the system can obtain power from different power sources and maintain stable operation in different working modes.

[0083] The DC inverter circuit includes two DC power supply interfaces, one 380V AC mains power supply interface, one 220V AC working bypass power supply interface and one 220V AC maintenance bypass power supply interface. Different interfaces are used for different power supply and standby modes to ensure that the system can provide stable power supply under various working and maintenance conditions.

[0084] This multi-interface design provides flexible power supply options and backup solutions, improving the redundancy and reliability of the system. In normal operation, maintenance or emergency situations, the system can switch power sources according to actual needs, ensuring the continuity and stability of power supply, reducing downtime and maintenance costs.

[0085] Among them, the uninterruptible power supply equipment has the function of automatically monitoring the working bypass AC power supply and has an automatic following function. The two sets of inverters adopt a regular rotation working mode and have an automatic inspection function to ensure that the equipment is in normal working mode for a long time. The equipment can be used for switch stations, terminal load substations and important load collection and feeding substations where the AC power supply in the station is relatively weak; it can greatly improve the power supply reliability of the substation control layer equipment; make full use of the resource advantages of the dual-set DC system of 330kV and above substations to further improve the power supply reliability; the two sets of inverters adopt a regular rotation working mode and have an automatic inspection function to ensure that the equipment is in normal working mode for a long time.

[0086] A control device for a DC inverter circuit provided in an embodiment of the present application is introduced below. The control device for a DC inverter circuit and a control method for a DC inverter circuit described below can refer to each other.

[0087] Please refer to Figure 3 , Figure 3 A schematic diagram of the structure of a control device for a DC inverter circuit provided in an embodiment of the present application.

[0088] In this embodiment, the device may include:

[0089] The working mode switching module 100 is used to start the dual inverter wheel switching working mode;

[0090] The switching judgment module 200 is used to perform switching judgment processing based on the acquired operating state data of the DC inverter circuit to obtain the current inverter object; wherein the DC inverter circuit is provided with a dual inverter circuit;

[0091] The first inverter access module 300 is used to send a control signal to access the control loop of the first inverter into the inverter loop when the current inverter object is the first inverter;

[0092] The second inverter access module 400 is used to send a control signal to access the control loop of the second inverter into the inverter loop when the current inverter object is the second inverter.

[0093] This application also provides an inverter circuit control device, please refer to Figure 4 , Figure 4 This is a schematic diagram of the structure of an inverter circuit control device provided in an embodiment of the present application. The inverter circuit control device may include:

[0094] Memory for storing computer programs;

[0095] The processor is used to implement the steps of any one of the above-mentioned methods for controlling a DC inverter circuit when executing a computer program.

[0096] like Figure 4 , which is a schematic diagram of the structure of an inverter circuit control device, the inverter circuit control device may include: a processor 10, a memory 11, a communication interface 12 and a communication bus 13. The processor 10, the memory 11 and the communication interface 12 communicate with each other through the communication bus 13.

[0097] In the embodiment of the present application, the processor 10 may be a central processing unit (CPU), an application specific integrated circuit, a digital signal processor, a field programmable gate array or other programmable logic devices.

[0098] The processor 10 may call a program stored in the memory 11. Specifically, the processor 10 may execute operations in an embodiment of the abnormal IP identification method.

[0099] The memory 11 is used to store one or more programs, which may include program codes, and the program codes include computer operation instructions. In the embodiment of the present application, the memory 11 at least stores programs for implementing the following functions:

[0100] The power control device starts the dual inverter rotation switching working mode;

[0101] Performing switching judgment processing based on the acquired operating status data of the DC inverter circuit to obtain the current inverter object; wherein the DC inverter circuit is provided with a dual inverter circuit;

[0102] When the current inverter object is the first inverter, sending a control signal to connect the control loop of the first inverter to the inverter loop;

[0103] When the current inverter object is the second inverter, a control signal is sent to connect the control loop of the second inverter to the inverter loop.

[0104] In a possible implementation, the memory 11 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function, etc.; the data storage area may store data created during use.

[0105] In addition, the memory 11 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device or other volatile solid-state storage device.

[0106] The communication interface 12 may be an interface of a communication module, and is used to connect to other devices or systems.

[0107] Of course, it should be noted that Figure 4 The structure shown does not constitute a limitation on the inverter circuit control device in the embodiment of the present application. In actual applications, the inverter circuit control device may include Figure 4 More or fewer components than shown, or combinations of certain components.

[0108] The present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above-mentioned methods for controlling a DC inverter circuit can be implemented.

[0109] The computer-readable storage medium may include: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

[0110] For an introduction to the computer-readable storage medium provided in this application, please refer to the above method embodiment, and this application will not go into details here.

[0111] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0112] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0113] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0114] The above is a detailed introduction to a control method, a control device, an inverter circuit control device and a computer-readable storage medium for a DC inverter circuit provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A control method for a DC inverter circuit, characterized in that: include: The power control device starts the dual inverter rotation switching working mode; Performing switching judgment processing based on the acquired operating status data of the DC inverter circuit to obtain the current inverter object; wherein the DC inverter circuit is provided with a dual inverter circuit; When the current inverter object is the first inverter, sending a control signal to connect the control loop of the first inverter to the inverter loop; When the current inverter object is the second inverter, a control signal is sent to connect the control loop of the second inverter to the inverter loop.

2. The control method according to claim 1, characterized in that: Based on the acquired operating status data of the DC inverter circuit, a switching judgment process is performed to obtain the current inverter object, including: Acquiring operating status data in the DC inverter circuit; Reasoning the operating status data based on an inverter switching model to obtain a current inverter object; The inverter switching model is obtained by model training based on historical operating status data.

3. The control method according to claim 1, characterized in that: Based on the acquired operating status data of the DC inverter circuit, a switching judgment process is performed to obtain the current inverter object, including: Acquiring operating status data in the DC inverter circuit; Determining whether the inverter is currently in a long-term working state based on the operating state data; If so, another inverter is used as the current inverter object.

4. The control method according to any one of claims 1 to 3, characterized in that: Also includes: Performing battery life monitoring on multiple batteries of the DC inverter circuit to obtain battery life data of each battery; The power supply load distribution ratio is adjusted based on the battery life data of each of the storage batteries.

5. The control method according to claim 4, characterized in that: Also includes: The power control device performs phase tracking processing to obtain a phase tracking result; A phase adjustment is performed based on the phase tracking result.

6. The control method according to claim 5, characterized in that: Also includes: The power supply control device performs automatic inspection processing according to a preset plan.

7. The control method according to claim 6, characterized in that: The DC inverter circuit includes: two DC power supply interfaces, one 380V AC mains power supply interface, one 220V AC working bypass power supply interface, and one 220V AC maintenance bypass power supply interface.

8. A control device for a DC inverter circuit, characterized in that: include: Working mode switching module, used to start dual inverter wheel switching working mode; A switching judgment module, used to perform switching judgment processing based on the acquired operating status data of the DC inverter circuit to obtain a current inverter object; wherein the DC inverter circuit is provided with a dual inverter circuit; A first inverter access module, used for sending a control signal to access the control loop of the first inverter into the inverter loop when the current inverter object is the first inverter; The second inverter access module is used to send a control signal to access the control loop of the second inverter into the inverter loop when the current inverter object is the second inverter.

9. An inverter circuit control device, characterized in that: include: Memory for storing computer programs; A processor, configured to implement the steps of the control method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the control method according to any one of claims 1 to 7 are implemented.

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