Load control method, system, storage medium and device based on single fault of main network

Abstract

The present invention provides a method, system, storage medium and equipment for load control based on a single fault of a main grid, and belongs to the technical field of electric power systems. The load control method includes: if there are two main transformers, after one of them fails, the power is transferred to another main transformer; if there are three or more main transformers, after one of them fails, the power is transferred according to the post-fault operation mode maintained in the system, that is, the rated capacity of the main transformer in normal operation is obtained respectively, and the current load of the main transformer and the load after the main transformer is transferred are calculated according to the formula: ((faulty main transformer operation load + normal main transformer operation load) / normal main transformer rated capacity) × 100%, and then according to the load situation after the transfer, the three processing processes of load transfer, controllable industrial dedicated line and controllable industrial transformation are followed to find out the lines that can alleviate the overload of the main transformer. The load control method can automatically calculate the optimal transfer plan, reduce manual workload, save working time, and improve work efficiency.

Description

Technical Field

[0001] The present invention relates to the field of smart grid technology, and in particular to a method, system, storage medium and device for load control based on a single fault in a main grid. Background Art

[0002] In the power industry, when a main transformer in a substation fails, the team members need to rely on experience to determine the operation mode after the failure and transfer the power to the lines controlled by the faulty main transformer. However, the transfer may cause the load rate of the transferred main transformer to be too high, so the load of the main transformer needs to be transferred. The transfer process is: first transfer the corresponding distribution network line load, then transfer the controllable industrial dedicated line load, and finally use the controllable industrial dedicated transformer load transfer. However, due to the complex calculation of the line data in each link, the team members spent a lot of time in judging whether the transfer plan can be calculated, and could not quickly calculate the optimal transfer plan. Summary of the invention

[0003] The purpose of the present invention is to provide a load control method and system based on a single fault in the main network. The load control method and system based on a single fault in the main network can automatically calculate the optimal transfer plan, reduce manual workload, save working time, and improve work efficiency.

[0004] In order to achieve the above object, the first aspect of the present invention provides a load control method based on a single fault of a main network, the load control method based on a single fault of a main network comprising:

[0005] If there are two main transformers, if one fails, the power will be transferred to the other main transformer;

[0006] If there are three or more main transformers, when one of them fails, the power supply will be transferred according to the post-failure operation mode maintained in the system, that is, the load rate of the main transformer in normal operation is obtained respectively, according to the formula:

[0007] The current load of the main transformer and the load after the main transformer overload are calculated by ((faulty main transformer operating load + normal main transformer operating load) / normal main transformer rated capacity) × 100%. Then, according to the load situation after the overload, the three processing processes of load overload, controllable industrial dedicated line and controllable industrial transformation are followed in turn to find out the lines that can alleviate the overload of the main transformer.

[0008] Preferably, the load control method based on a single fault of the main grid also includes visually displaying the post-fault operation mode when a fault occurs in the main transformer.

[0009] Preferably, the corresponding post-fault operation mode and the load rate of the normal main transformer after power transfer are displayed according to the faulty main transformer.

[0010] Preferably, based on the operating relationship between the main transformers in the dispatching profession in the power grid, the formula of ((faulty main transformer operating load + normal main transformer operating load) / normal main transformer rated capacity) × 100% is used to calculate whether the load rate of the main transformer after power transfer exceeds 100% to determine whether power transfer is required.

[0011] Preferably, when the normal main transformer load rate exceeds 100%, the following steps are performed:

[0012] Step 1: In the load transfer of distribution network lines, the line connection relationship controlled by the substation to which the faulty main transformer belongs is displayed, and the optimal line transfer strategy is displayed;

[0013] Step 2: If the load rate of the main transformer still exceeds 100% after the load transfer of the distribution network line, the controllable industrial dedicated line controlled by the substation is displayed according to the substation, and the load transfer is performed;

[0014] Step 3: If the load rate of the main transformer after step 2 is still over 100%, the controllable industrial transformer controlled by the substation will be used for power transfer.

[0015] A second aspect of the present invention provides a system for implementing the above-mentioned load control method based on a single failure of a main network, the system comprising:

[0016] The data acquisition module is used to collect the substation and line contact relationship diagram of the maintenance line, and obtain the operation data by combining the controllable industrial dedicated line, controllable industrial dedicated transformer and main transformer operation mode;

[0017] The data processing module is used to calculate whether the load rate of the main transformer after the transfer is over 100% based on the operating relationship between the main transformers of the dispatching profession in the power grid through the formula of ((faulty main transformer operating load + normal main transformer operating load) / normal main transformer rated capacity) × 100%, and is set to be able to display the line contact relationship controlled by the substation to which the faulty main transformer belongs in the distribution network line load transfer when the normal main transformer load rate exceeds 100%, and at the same time display the optimal line transfer strategy; if the main transformer load rate still exceeds 100% after the distribution network line transfer, the controllable industrial dedicated line controlled by the substation is displayed according to the substation, and the transfer is carried out; if the main transformer load rate still exceeds 100% after the controllable industrial dedicated line transfer, the controllable industrial dedicated transformer controlled by the substation is transferred, and the final processing result is transmitted to the solution display module;

[0018] The solution display module is used to display the operation mode after a fault.

[0019] Preferably, the data collected by the data collection module includes:

[0020] Line ledger information: line of the substation, line current carrying capacity, line name, busbar, switch number and operation and maintenance unit;

[0021] Substation ledger information: rated capacity of main transformer;

[0022] Contact diagram: line contact relationship, controllable industrial dedicated line and controllable industrial dedicated transformer;

[0023] Business operation data: line current, line active power, line load, main transformer active power and main transformer load data.

[0024] A third aspect of the present invention provides a storage medium, comprising: a computer program, which, when executed by a processor, implements the above-mentioned load control method based on a single failure of a main network.

[0025] The fourth aspect of the present invention provides a device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned load control method based on a single failure of the main network when executing the computer program.

[0026] According to the above technical scheme, the present invention is based on the operation data of the power grid equipment, for the main transformer with fault, combined with the line load transfer, controllable industrial dedicated line and controllable industrial dedicated transformer operation rules, and uses machine learning technology to realize off-site transfer and industrial control measures for the faulty main transformer that is still overloaded after internal load transfer, automatically generate solutions to solve the overload situation of the main transformer, and improve the high-reliability response capability to sudden failures, peak loads and other events.

[0027] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0029] Figure 1 It is a flow chart of a load control method based on a single failure of a main network provided according to the present invention. DETAILED DESCRIPTION

[0030] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0031] It should be noted that the acquisition, transmission, storage, use, and processing of data in the technical solution of this application are in compliance with the relevant provisions of national laws and regulations. In the embodiments of this application, some existing solutions in the industry such as certain software, components, and models may be mentioned, which should be considered as exemplary. Their purpose is only to illustrate the feasibility of implementing the technical solution of this application, but it does not mean that the applicant has or will necessarily use the solution.

[0032] See also Figure 1 On the one hand, the present invention provides a load control method based on a single fault of a main network, and the load control method based on a single fault of a main network includes:

[0033] If there are two main transformers, if one fails, the power will be transferred to the other main transformer;

[0034] If there are three or more main transformers, when one of them fails, the power supply will be transferred according to the post-fault operation mode maintained in the system, that is, the rated capacity of the main transformer in normal operation is obtained respectively, according to the formula:

[0035] The current load of the main transformer and the load after the main transformer overload are calculated by ((faulty main transformer operating load + normal main transformer operating load) / normal main transformer rated capacity) × 100%. Then, according to the load situation after the overload, the three processing processes of load overload, controllable industrial dedicated line and controllable industrial transformation are followed in turn to find out the lines that can alleviate the overload of the main transformer.

[0036] Among them, the load control method based on a single fault of the main grid also includes visually displaying the post-fault operation mode when a main transformer fails.

[0037] During the intuitive display, in order to facilitate the team members to intuitively understand the specific situation of the fault and the current status and post-transfer status of the main transformer, preferably, the corresponding post-fault operating mode and the load rate of the normal main transformer after transfer are displayed according to the faulty main transformer.

[0038] Before transferring power, it is necessary to estimate the load of the main transformer after the transfer in advance so as to accurately determine whether the transfer is needed. In order to avoid unnecessary transfer operations that lead to waste of resources, it is preferably based on the operating relationship between the main transformers in the dispatching profession in the power grid (taking the failure of three main transformers as an example: when the 1# main transformer fails, the entire load of the line responsible for the 1# main transformer is borne by the 2# main transformer, and the 3# main transformer operates normally; when the 2# main transformer fails, the entire load of the line responsible for the 2# main transformer is borne by the 1# main transformer, and the 3# main transformer operates normally. The above examples are only examples, and the load transfer should be carried out according to the actual situation of the dispatching profession.), calculate whether the load rate of the main transformer after the transfer exceeds 100% through the formula of ((faulty main transformer operating load + normal main transformer operating load) / normal main transformer rated capacity) × 100% to determine whether the transfer is needed.

[0039] Specifically, after the above calculation, when the normal main transformer load rate exceeds 100%, the following steps are performed:

[0040] Step 1: In the load transfer of distribution network lines, the line connection relationship controlled by the substation to which the faulty main transformer belongs is displayed, and the optimal line transfer strategy is displayed;

[0041] Step 2: If the load rate of the main transformer still exceeds 100% after the distribution network line is transferred, the controllable industrial dedicated line controlled by the substation will be displayed according to the substation, and the supply will be transferred;

[0042] Step 3: If the load rate of the main transformer after step 2 is still over 100%, the controllable industrial transformer controlled by the substation will be used for power transfer.

[0043] Through the above technical solution, based on the operation data of power grid equipment, for the main transformer with fault, combined with the line load transfer, controllable industrial dedicated line and controllable industrial dedicated transformer operation rules, machine learning technology is used to realize off-site transfer and industrial control measures for the faulty main transformer that is still overloaded after internal load transfer, automatically generate solutions to solve the overload of the main transformer, and improve the high-reliability response capability to sudden failures, peak loads and other events.

[0044] Another aspect of the present invention provides a system for implementing the above-mentioned load control method based on a single failure of the main network, the system comprising:

[0045] The data acquisition module is used to collect the substation and line contact relationship diagram of the maintenance line, and obtain the operation data by combining the controllable industrial dedicated line, controllable industrial dedicated transformer and main transformer operation mode;

[0046] The data processing module is used to calculate whether the load rate of the main transformer after the transfer is over 100% based on the operating relationship between the main transformers of the dispatching profession in the power grid through the formula of ((faulty main transformer operating load + normal main transformer operating load) / normal main transformer rated capacity) × 100%, and is set to be able to display the line contact relationship controlled by the substation to which the faulty main transformer belongs in the distribution network line load transfer when the normal main transformer load rate exceeds 100%, and at the same time display the optimal line transfer strategy; if the main transformer load rate still exceeds 100% after the distribution network line transfer, the controllable industrial dedicated line controlled by the substation is displayed according to the substation, and the transfer is carried out; if the main transformer load rate still exceeds 100% after the controllable industrial dedicated line transfer, the controllable industrial dedicated transformer controlled by the substation is transferred, and the final processing result is transmitted to the solution display module;

[0047] The solution display module is used to display the operation mode after a fault.

[0048] Specifically, the data collected by the above data collection module includes:

[0049] Line ledger information: line of the substation, line current carrying capacity, line name, busbar, switch number and operation and maintenance unit;

[0050] Substation ledger information: rated capacity of main transformer;

[0051] Contact diagram: line contact relationship, controllable industrial dedicated line and controllable industrial dedicated transformer;

[0052] Business operation data: line current, line active power, line load, main transformer active power and main transformer load data. The system can quickly display the post-fault operation mode corresponding to the faulty main transformer, and quickly select the best transfer plan according to the order of the transfer process, and provide intelligent processing measures, saving a lot of time spent by team members in judging whether to transfer and calculating the transfer plan, reducing manual workload and improving work efficiency.

[0053] In addition, the present invention provides a storage medium, which includes: a computer program, which implements the above-mentioned load control method based on a single failure of the main network when executed by a processor.

[0054] In addition, the present invention also provides a device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned load control method based on a single failure of the main network is implemented.

[0055] The following is a specific implementation method for illustrating the load control method based on a single failure of the main network provided by the present invention:

[0056] Step 1: Select the faulty substation and generate a solution by taking the 1# main transformer of substation A as an example;

[0057] Step 2. Obtain the line and main transformer data of the A substation, including line ledger information: the line of the substation, line current carrying capacity, line name, busbar, switch number, and operation and maintenance unit; substation ledger information: rated capacity of the main transformer; contact diagram: line contact relationship, controllable industrial dedicated line, and controllable industrial dedicated transformer; business operation data: line current, line active power, line load, main transformer active power, and main transformer load data;

[0058] Step 3: Calculate and select:

[0059] (1) Calculate the load rate of the 2# main transformer after the power supply is switched when the 1# main transformer of substation A fails: ((line load of the normal main transformer + line load of the faulty main transformer) / rated capacity of the normal main transformer) × 100%;

[0060] Take the load rate of 2# main transformer as 130% after power transfer as an example.

[0061] (2) Obtain the line connection relationship of the A substation and calculate the optimal transfer route for display:

[0062] Obtain the incoming line related to the line belonging to substation A from the contact relationship, and calculate the load of the line after the transfer and the load of the main transformer corresponding to the incoming line according to the formula: ((load of the incoming line + load of the outgoing line) / current carrying capacity of the incoming line) * 100%; find the optimal incoming line according to the three processes of transfer capacity, line allowable current carrying capacity, and number of low-voltage users of the line:

[0063] If the transfer capacity is large, it will be the optimal line. When the difference in transfer capacity does not exceed 10%, the line with a large allowable current carrying capacity will be selected as the optimal line. If the difference in allowable current carrying capacity does not exceed 10%, the line with the fewest low-voltage users controlled in the line will be selected as the optimal line.

[0064] Through the contact relationship, it is found that the transfer line of line A1 corresponds to lines B1 and C1, and through the above rules, it is calculated that line B1 is the optimal line of line A1.

[0065] (3) After calculating the optimal route, calculate the load rate of line B1 after the transfer:

[0066] According to the line's current carrying capacity and power flow, calculate the line's load rate after transfer: ((load of the outgoing line + load of the incoming line) / line current carrying capacity) × 100%;

[0067] According to the above formula, after the A1 line is transferred to the B1 line, the load rate of the B1 line will become 41.8%.

[0068] (4) According to the process of alleviating the load rate of the main transformer: load transfer → controllable industrial dedicated line → controllable industrial dedicated transformer, the process of alleviating the load rate after the main transformer transfer is carried out.

[0069] 1) The system automatically selects the lines in load transfer, adds up the active power of the lines to get the total active power, and calculates whether the overload situation of substation A has been alleviated. That is, the overload rate after transfer - ((line load - load transfer) / rated capacity of main transformer) × 100%;

[0070] According to the above formula, after the load transfer of the 2# main transformer, the load rate will be 118%, which has been alleviated but is still overloaded, so it is necessary to continue the processing of the controllable industrial dedicated line.

[0071] 2) According to the above judgment, the overload situation of the 2# main transformer has not been solved, so the system automatically selects the controllable industrial dedicated line, adds the active power of the lines to get the total active power, and calculates whether the overload situation of substation A has been alleviated. That is, the overload load rate after transfer - ((line load - load transfer - controllable industrial dedicated line) / rated capacity of the main transformer) × 100%;

[0072] According to the above formula, after the load transfer of the 2# main transformer, the load rate will be 108%, which has been alleviated but is still overloaded, so it is necessary to continue to process the controllable industrial special transformer.

[0073] 3) The load transfer and controllable industrial dedicated line process did not solve the overload situation of the 2# main transformer, so the system automatically checked the controllable industrial dedicated transformer line, added the active power of the lines to get the total active power, and calculated whether the overload situation of substation A was alleviated. That is, the overload rate after transfer - ((line load - load transfer - controllable industrial dedicated line - controllable industrial dedicated transformer) / rated capacity of the main transformer) × 100%;

[0074] According to the above formula, after the 2# main transformer is transferred through load, the load rate will be 98%, which has alleviated the overload situation of the 2# main transformer.

[0075] Step 4: Output and display the solution:

[0076] According to the results of the above process, an intelligent solution is output: when the 2# main transformer of substation A fails, load transfer of 2.3WM, industrial dedicated line load control of 4.5WM, and industrial dedicated transformer load control of 3.2WM are adopted. After taking measures, the load rate of 2# main transformer is reduced to 98%.

[0077] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0078] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0079] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0080] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0081] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0082] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0083] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0084] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0085] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A load control method based on a single failure of the main network, characterized in that: The load control method based on a single failure of the main network includes: If there are two main transformers, if one fails, the power will be transferred to the other main transformer; If there are three or more main transformers, when one of them fails, the power supply will be transferred according to the post-failure operation mode maintained in the system, that is, the load rate of the main transformer in normal operation is obtained respectively, according to the formula: The current load of the main transformer and the load after the main transformer overload are calculated by ((faulty main transformer operating load + normal main transformer operating load) / normal main transformer rated capacity) × 100%. Then, according to the load situation after the overload, the three processing processes of load overload, controllable industrial dedicated line and controllable industrial transformation are followed in turn to find out the lines that can alleviate the overload of the main transformer.

2. The load control method based on a single failure of the main network according to claim 1 is characterized in that: The load control method based on a single fault of the main grid also includes visually displaying the post-fault operation mode when a fault occurs in the main transformer.

3. The load control method based on a single failure of the main network according to claim 2 is characterized in that: According to the faulty main transformer, the corresponding post-fault operation mode and the load rate of the normal main transformer after power transfer are displayed.

4. The load control method based on a single failure of the main network according to claim 1 is characterized in that: Based on the operating relationship between the main transformers in the dispatching profession in the power grid, the formula of ((faulty main transformer operating load + normal main transformer operating load) / normal main transformer rated capacity) × 100% is used to calculate whether the load rate of the main transformer after power transfer exceeds 100% to determine whether power transfer is needed.

5. The load control method based on a single failure of the main network according to claim 4 is characterized in that: When the normal main transformer load rate exceeds 100%, perform the following steps: Step 1: In the load transfer of distribution network lines, the line connection relationship controlled by the substation to which the faulty main transformer belongs is displayed, and the optimal line transfer strategy is displayed; Step 2: If the load rate of the main transformer still exceeds 100% after the distribution network line is transferred, the controllable industrial dedicated line controlled by the substation will be displayed according to the substation, and the supply will be transferred; Step 3: If the load rate of the main transformer after step 2 is still over 100%, the controllable industrial transformer controlled by the substation will be used for power transfer.

6. A system for implementing the load control method based on a single failure of the main network as described in any one of claims 1 to 5, characterized in that: The system comprises: The data acquisition module is used to collect the substation and line contact relationship diagram of the maintenance line, and obtain the operation data by combining the controllable industrial dedicated line, controllable industrial dedicated transformer and main transformer operation mode; The data processing module is used to calculate whether the load rate of the main transformer after the transfer exceeds 100% based on the operating relationship between the main transformers of the dispatching profession in the power grid through the formula of ((faulty main transformer operating load + normal main transformer operating load) / normal main transformer rated capacity) × 100%, and is set to be able to display the line contact relationship controlled by the substation to which the faulty main transformer belongs in the distribution network line load transfer when the normal main transformer load rate exceeds 100%, and at the same time display the optimal line transfer strategy; if the main transformer load rate still exceeds 100% after the distribution network line load transfer, the controllable industrial dedicated line controlled by the substation is displayed according to the substation, and the transfer is carried out; if the main transformer load rate still exceeds 100% after the controllable industrial dedicated line transfer, the controllable industrial dedicated transformer controlled by the substation is transferred, and the final processing result is transmitted to the solution display module; The solution display module is used to display the operation mode after a fault.

7. The system according to claim 6, characterized in that The data collected by the data collection module includes: Line ledger information: line of the substation, line current carrying capacity, line name, busbar, switch number and operation and maintenance unit; Substation ledger information: rated capacity of main transformer; Contact diagram: line contact relationship, controllable industrial dedicated line and controllable industrial dedicated transformer; Business operation data: line current, line active power, line load, main transformer active power and main transformer load data.

8. A storage medium, characterized in that: include: A computer program, which, when executed by a processor, implements the load control method based on a single failure of the main network as described in any one of claims 1 to 5.

9. A device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the load control method based on a single failure of the main network as described in any one of claims 1 to 5 is implemented.

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