Multi-channel comprehensive improvement method and system for voltage qualified rate of power distribution network, and medium

Abstract

The invention relates to a multi-channel comprehensive improvement method and system for the voltage qualification rate of a power distribution network and a medium. Defining related threshold values, and screening distribution transformers and users with abnormal voltage in a target unit; outputting a bus gear shifting scheme; bus gear shifting scheme effect simulation is carried out; adjusting a bus gear shifting scheme; outputting a distribution transformer gear shifting scheme; simulating the effect of the distribution transformer gear shifting scheme; adjusting a distribution transformer gear shifting scheme; positioning a local voltage weak point; outputting a local voltage weak point treatment scheme; and a unit is guided to carry out voltage treatment. According to the invention, the first calculation and the second adjustment of the bus and distribution transformer gear shifting work can be realized, and the effectiveness of the gear shifting work and the safe and stable operation of a power grid are guaranteed.

Description

Technical Field

[0001] The present application relates to the field of electric power grid technology, and in particular to a method, system and medium for comprehensively improving the voltage qualification rate of a distribution network through multiple channels. Background Art

[0002] The low voltage in weak grid areas, high voltage in high cable rate areas, and seasonal load voltage bidirectional over-limit problems such as coal-to-electricity and well access are more prominent. Industrial parks such as precision manufacturing have higher requirements for voltage quality. At the same time, social and economic development has put forward higher requirements for power supply voltage management. At present, the voltage management of various provincial grid companies relies heavily on manual experience, and the model adopted is "problem first, then management", which has become increasingly difficult to meet the needs of high-standard voltage quality.

[0003] At present, the voltage management method relies heavily on the experience of operators. The operations of different personnel may lead to different results, which increases uncertainty. At the same time, the existing voltage management method cannot achieve a preliminary assessment of the management results, which may lead to a lack of effectiveness and low capital utilization. In addition, the current management model of "problem first, management later" has a certain lag, and the user complaint rate caused by low voltage problems is relatively high. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a method, system and medium for comprehensively improving the voltage qualification rate of a distribution network through multiple channels, which can realize the "calculation before adjustment" of busbar and distribution transformer adjustment work, and ensure the effectiveness of the adjustment operation and the safe and stable operation of the power grid.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a method for comprehensively improving the voltage qualification rate of a distribution network through multiple channels, comprising the following steps:

[0007] Data collection, taking a single busbar and its connected distribution transformer and users within the unit as the research object, collecting voltage data on the low-voltage side of all buses, distribution transformers, and users at all times within the unit;

[0008] Define relevant thresholds to filter out abnormal voltage distribution transformers and users within the target unit;

[0009] Output busbar adjustment plan, select abnormal distribution transformers according to abnormal distribution transformer screening criteria, set adjustment criteria and carry out busbar adjustment;

[0010] Simulation of the effectiveness of busbar adjustment scheme;

[0011] Busbar adjustment scheme adjustment: Based on the busbar adjustment scheme simulation results, adjust the busbar adjustment scheme until it meets the requirements, thereby guiding the busbar adjustment;

[0012] Output distribution transformer adjustment plan, select abnormal areas after busbar adjustment according to abnormal area selection criteria, set adjustment criteria and carry out distribution transformer adjustment;

[0013] Simulation of the effectiveness of the distribution transformer adjustment plan;

[0014] Adjust the distribution transformer shifting scheme, based on the simulation results of the distribution transformer shifting scheme, adjust the distribution transformer shifting scheme until it meets the requirements, and then guide the distribution transformer shifting;

[0015] Local voltage weak points are located. According to the above-mentioned final busbar-distribution transformer step-by-step adjustment scheme and its simulation results, abnormal distribution transformers and substations are screened in combination with the screening standards for abnormal distribution transformers and substations, and local voltage weak points are located.

[0016] Output local voltage weak point treatment plan, combined with historical typical cases of voltage treatment, according to the problem type, investment, treatment effect of the guidance output optimal voltage treatment plan;

[0017] Guide the units to carry out voltage management, based on the busbar-voltage step-by-step adjustment plan and the local voltage weak point management plan, guide the target units to carry out voltage management and achieve comprehensive improvement of voltage quality.

[0018] The data collection is specifically as follows: i ,PDY ni 、YDY ki Indicates that the subscripts n and k represent different distribution transformers and users respectively, and i represents different voltage collection times. The number of distribution transformers, users, and voltage collection in the unit is defined as N, K, and I respectively, and the value ranges of n, k, and i are as follows:

[0019]

[0020] The definition of relevant thresholds, screening target unit voltage abnormal distribution transformer, user specific is,

[0021] (1) Locating abnormal voltage distribution transformers: traverse the voltage data of all distribution transformers and count the number of abnormal points.

[0022]

[0023]

[0024] In the above formula (2), PDY min Indicates the lower threshold of the distribution transformer voltage, PDY max Indicates the upper threshold of the distribution transformer voltage, PDYDY ni ,PDYGY niIt is an intermediate variable used to indicate whether the nth distribution transformer exceeds the limit at the i-th point. The former is equal to 1, indicating that the distribution transformer voltage exceeds the lower limit, and the latter is equal to 1, indicating that the distribution transformer voltage exceeds the upper limit. n Indicates the number of points where the voltage of the nth distribution transformer exceeds the lower limit, PDYGYN n Indicates the number of points where the voltage of the nth distribution transformer exceeds the upper limit. The screening criteria for abnormal voltage distribution transformers are based on PDYDYN n ,PDYGYN n The value of is determined as shown in the following formula.

[0025]

[0026]

[0027] In the above formula (4), α represents the threshold value of abnormal distribution transformer voltage points, PDYDY n ,PDYGY n It is an intermediate variable, which is used to indicate whether the nth distribution transformer is defined as a low-voltage or high-voltage abnormal distribution transformer. If it is equal to 1, it is defined as a voltage abnormal distribution transformer, and if it is equal to 0, it is defined as a normal distribution transformer.

[0028] (2) Locate the abnormal voltage area, traverse the voltage data of all collection points in all areas and count the number of abnormal points.

[0029]

[0030]

[0031] In the above formula (6), TDY min Indicates the lower voltage threshold of the substation, TDY max Indicates the upper voltage threshold of the substation, TDYDY ki TDYGY ki It is an intermediate variable used to indicate whether the kth station exceeds the limit at the i-th point. 1 indicates that the limit is exceeded, and 0 indicates that the limit is not exceeded. k TDYGYN k Indicates the number of voltage limit points in the kth transformer area. The screening criteria for abnormal voltage distribution transformers are based on TDYDNY k TDYGYN k The value of is determined as shown in the following formula:

[0032]

[0033]

[0034] In the above formula (8), β represents the threshold value of abnormal distribution transformer voltage points, TDYDY kTDYGY k It is an intermediate variable used to indicate whether the kth substation is defined as a voltage abnormality substation. If it is equal to 1, it is defined as a voltage abnormality substation, and if it is equal to 0, it is defined as a normal substation.

[0035] The output busbar adjustment plan selects abnormal distribution transformers according to the abnormal distribution transformer selection criteria, and sets the adjustment criteria to carry out busbar adjustment as follows:

[0036]

[0037] In the above formula (10), γ represents the threshold judgment condition for bus adjustment, MXTD represents whether bus adjustment is to be carried out, 1 means bus adjustment needs to be carried out, and 0 means bus adjustment does not need to be carried out.

[0038] The simulation of the effectiveness of the busbar adjustment scheme is as follows:

[0039] Model building

[0040] Assuming that the number of variables of a single busbar that needs to be adjusted is N, combined with the random forest algorithm, based on MDY i ,PDY ni Establish feature engineering, MDY i represents the voltage of the target bus at time i, PDY ni Indicates the voltage of the nth distribution transformer connected to the target bus at time i. i As the input of the model, PDY ni The busbar adjustment scheme effectiveness simulation model is constructed with one-dimensional input and N-dimensional output as the output of the model;

[0041] Model Training

[0042] Conduct model training and explore MDY i With PDY ni The corresponding relationship between them;

[0043] Simulation of the effectiveness of the transmission gear adjustment plan

[0044] Using the trained model, the low-voltage side voltage of the bus after the preliminary bus adjustment plan is implemented is input. For a five-speed transformer, the voltage changes by 2.5% per gear, or for a three-speed transformer, the voltage changes by 5% per gear. The model automatically outputs all the distribution transformer voltage data of the bus after the adjustment.

[0045] According to the abnormal area screening criteria, the abnormal areas after busbar adjustment are screened, and the adjustment criteria are set to carry out distribution transformer adjustment.

[0046] Single distribution transformer adjustment process:

[0047]

[0048] In the above formula (11), θ represents the threshold judgment condition for carrying out the distribution transformer adjustment, PBTD represents whether to carry out the distribution transformer adjustment, and PBTD is equal to 1, indicating that the distribution transformer adjustment needs to be carried out, and 0, indicating that the distribution transformer adjustment does not need to be carried out.

[0049] The simulation of the effectiveness of the distribution transformer adjustment plan is as follows:

[0050] (1) Model establishment

[0051] Assuming that the number of users that need to be adjusted is M, combined with the random forest algorithm, based on PDY i 、YDY mi Building feature engineering, PDY i Indicates the voltage of the target distribution transformer at time i, YDY mi It represents the voltage of the target distribution transformer connected to the mth user at time i. i As the input of the model, YDY mi The output of the model is regarded as a one-dimensional input and M-dimensional output distribution transformer adjustment scheme effectiveness simulation model;

[0052] (2) Model training

[0053] Conduct model training and explore PDY i with YDY mi The corresponding relationship between them;

[0054] (3) Simulation of the effectiveness of the transmission gear adjustment plan

[0055] Using the trained model, the voltage on the low-voltage side of the distribution transformer after the preliminary distribution transformer adjustment plan is implemented is input. The voltage is changed by 2.5% for a five-speed transformer or 5% for a three-speed transformer. The model automatically outputs the voltage data of all users carried by the distribution transformer after the adjustment.

[0056] In a second aspect, an embodiment of the present application provides a system for comprehensively improving the voltage qualification rate of a distribution network through multiple channels, including a memory and a processor, wherein the memory includes a program for a method for comprehensively improving the voltage qualification rate of a distribution network through multiple channels, and when the program for the method for comprehensively improving the voltage qualification rate of a distribution network through multiple channels is executed by the processor, the following steps are implemented: data collection, taking a single bus within a unit and its connected distribution transformers and users as research objects, collecting voltage data of all bus low-voltage sides, distribution transformer low-voltage sides, and user sides within the unit at all times; defining relevant thresholds, screening distribution transformers and users with abnormal voltage within the target unit; outputting a bus adjustment plan, screening abnormal distribution transformers according to abnormal distribution transformer screening criteria, setting adjustment criteria to carry out bus adjustment; simulating the effectiveness of the bus adjustment plan; adjusting the bus adjustment plan, adjusting the bus adjustment plan based on the simulation results of the bus adjustment plan until the requirements are met, thereby guiding the bus adjustment ; Output distribution transformer adjustment plan, select abnormal substations after bus adjustment according to abnormal substation screening standards, set adjustment criteria to carry out distribution transformer adjustment; Simulate the effectiveness of distribution transformer adjustment plan; Adjust distribution transformer adjustment plan, adjust the distribution transformer adjustment plan based on the simulation results of the distribution transformer adjustment plan until the requirements are met, and then guide the distribution transformer adjustment; Locate local voltage weak points, according to the above-mentioned final version of the bus-distribution transformer step-by-step adjustment plan and its simulation results, combined with the abnormal distribution transformer and substation screening standards to select abnormal distribution transformers and substations, and locate local voltage weak points; Output local voltage weak point control plan, combined with historical typical cases of voltage control, according to the problem type, investment, and control results, provide guidance to output the optimal voltage control plan; Guide units to carry out voltage control, based on the bus-voltage step-by-step adjustment plan and the local voltage weak point control plan, guide target units to carry out voltage control and achieve comprehensive improvement of voltage quality.

[0057] In a third aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the method for comprehensively improving the voltage qualification rate of a distribution network through multiple channels as described above are implemented.

[0058] Compared with the prior art, the present invention has the following beneficial effects:

[0059] 1. This application sets quantitative analysis indicators for distribution transformers and user voltage over-limit situations, supports early analysis of abnormal voltage problems, and changes the traditional voltage management model of "problems first, then management" to "early discovery, early prevention".

[0060] 2. This application uses the random forest algorithm to complete the calculation of voltage qualification rate and over-limit situation after voltage regulation, and realizes the preliminary evaluation of the adjustment effect.

[0061] 3. This application can realize the “calculate first, then adjust” of busbar and distribution transformer adjustment work, ensuring the effectiveness of the adjustment operation and the safe and stable operation of the power grid.

[0062] 4. This application implements the voltage quality improvement in accordance with the voltage management idea of ​​"first the whole, then the local", and can achieve higher voltage management results with less cost investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0064] Figure 1 It is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0065] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0066] The terms "comprises," "comprising," or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0067] The terms "first", "second", etc. are only used to distinguish one entity or operation from another entity or operation, and should not be understood as indicating or implying relative importance, nor should they be understood as requiring or implying any such actual relationship or order between these entities or operations.

[0068] like Figure 1 The proposal shown here constructs a method for accurately identifying the actual operating gear of the distribution transformer, including data collection, voltage weak point location, overall busbar-distribution transformer gear adjustment plan, gear adjustment plan effectiveness simulation, feedback and correction, local voltage weak point location, local voltage management plan, and guidance for various units to carry out voltage management. The overall flow chart is as follows Figure 1 As shown:

[0069] The specific process is as follows:

[0070] 1. Data Collection

[0071] Taking a single busbar and its connected distribution transformer and user in the unit as the research object, the voltage data of the low-voltage side of all buses, the low-voltage side of distribution transformers and the user side in the unit at all times are collected, and the MDY i ,PDY ni 、YDY ki Indicates that the subscripts n and k represent different distribution transformers and users respectively, and i represents different voltage collection times. The number of distribution transformers, users, and voltage collection in the unit is defined as N, K, and I respectively, and the value ranges of n, k, and i are as follows:

[0072]

[0073] Define relevant thresholds to filter abnormal voltage distribution transformers and users within the target unit

[0074] (1) Locating abnormal voltage distribution transformers: traverse the voltage data of all collection points of all distribution transformers and count the number of abnormal points.

[0075]

[0076]

[0077] In the above formula (2), PDY min Indicates the lower threshold of the distribution transformer voltage, PDY max Indicates the upper threshold of the distribution transformer voltage, PDYDY ni ,PDYGY ni PDYDYN is an intermediate variable used to indicate whether the nth distribution transformer exceeds the limit at the i-th point. The former is equal to 1, indicating that the distribution transformer voltage exceeds the lower limit, and the latter is equal to 1, indicating that the distribution transformer voltage exceeds the upper limit. n Indicates the number of points where the voltage of the nth distribution transformer exceeds the lower limit, PDYGYN n Indicates the number of points where the voltage of the nth distribution transformer exceeds the upper limit. The screening criteria for abnormal voltage distribution transformers are based on PDYDYN n ,PDYGYN n The value of is determined as shown in the following formula.

[0078]

[0079]

[0080] In the above formula (4), α represents the threshold value of abnormal distribution transformer voltage points, PDYDY n ,PDYGY n It is an intermediate variable used to indicate whether the nth distribution transformer is defined as a low-voltage or high-voltage abnormal distribution transformer. If it is equal to 1, it is defined as a voltage abnormal distribution transformer, and if it is equal to 0, it is defined as a normal distribution transformer.

[0081] (2) Locate the abnormal voltage area, traverse the voltage data of all collection points in all areas and count the number of abnormal points.

[0082]

[0083]

[0084] In the above formula (6), TDY min Indicates the lower voltage threshold of the substation, TDY max Indicates the upper voltage threshold of the substation, TDYDY ki TDYGY ki It is an intermediate variable used to indicate whether the kth station exceeds the limit at the i-th point. 1 indicates that the limit is exceeded, and 0 indicates that the limit is not exceeded. k TDYGYN k Indicates the number of voltage limit points in the kth transformer area. The screening criteria for abnormal voltage distribution transformers are based on TDYDNY k TDYGYN k The value of is determined as shown in the following formula.

[0085]

[0086]

[0087] In the above formula (8), β represents the threshold value of abnormal distribution transformer voltage points, TDYDY k TDYGY k It is an intermediate variable used to indicate whether the kth substation is defined as a voltage abnormality substation. If it is equal to 1, it is defined as a voltage abnormality substation, and if it is equal to 0, it is defined as a normal substation.

[0088] Output busbar adjustment scheme

[0089] According to the abnormal distribution transformer screening criteria in step 2, select abnormal distribution transformers, set the adjustment criteria to carry out busbar adjustment, as follows:

[0090]

[0091] In the above formula (10), γ represents the threshold judgment condition for bus adjustment, MXTD represents whether bus adjustment is to be carried out, 1 means bus adjustment needs to be carried out, and 0 means bus adjustment does not need to be carried out.

[0092] Simulation of the effectiveness of busbar adjustment scheme

[0093] (1) Model establishment

[0094] Assuming that the number of variables of a single busbar that needs to be adjusted is N, combined with the random forest algorithm, based on MDY i,PDY ni Establish feature engineering, MDY i represents the voltage of the target bus at time i, PDY ni Indicates the voltage of the nth distribution transformer connected to the target bus at time i. i As the input of the model, PDY ni The output of the model is regarded as a one-dimensional input and N-dimensional output busbar shifting scheme effectiveness simulation model.

[0095] Model Training

[0096] Conduct model training and explore MDY i With PDY ni The corresponding relationship between

[0097] Simulation of the effectiveness of the transmission gear adjustment plan

[0098] Using the trained model, the low-voltage side voltage of the bus after the preliminary bus adjustment plan is implemented is input, and the five-speed transformer changes by 2.5% per gear (or the three-speed transformer changes by 5%). The model automatically outputs all the distribution transformer voltage data of the bus after the adjustment.

[0099] 5. Adjustment of busbar shifting scheme

[0100] Based on the simulation results of the busbar shifting scheme, the busbar shifting scheme is adjusted until the requirements are met, thereby guiding the busbar shifting.

[0101] 6. Output distribution and gear adjustment scheme

[0102] According to the abnormal area screening criteria in step 2, select the abnormal area after busbar adjustment, set the adjustment criteria to carry out distribution transformer adjustment. The following is the single distribution transformer adjustment process:

[0103]

[0104] In the above formula (11), θ represents the threshold judgment condition for carrying out the distribution transformer adjustment, PBTD represents whether to carry out the distribution transformer adjustment, and PBTD is equal to 1, indicating that the distribution transformer adjustment needs to be carried out, and 0, indicating that the distribution transformer adjustment does not need to be carried out.

[0105] 7. Simulation of the effectiveness of the transmission gear adjustment plan

[0106] (1) Model establishment

[0107] Assuming that the number of users that need to be adjusted is M, combined with the random forest algorithm, based on PDY i 、YDY mi Building feature engineering, PDY i Indicates the voltage of the target distribution transformer at time i, YDY mi It represents the voltage of the target distribution transformer connected to the mth user at time i.i As the input of the model, YDY mi The output of the model is regarded as a one-dimensional input and M-dimensional output distribution transformer adjustment scheme effectiveness simulation model.

[0108] (2) Model training

[0109] Conduct model training and explore PDY i with YDY mi The corresponding relationship between

[0110] (3) Simulation of the effectiveness of the transmission gear adjustment plan

[0111] Using the trained model, the voltage on the low-voltage side of the distribution transformer after the preliminary distribution transformer adjustment plan is implemented is input. The voltage of a five-speed transformer is changed by 2.5% per gear (or a three-speed transformer is changed by 5%). The model automatically outputs the voltage data of all users carried by the distribution transformer after the adjustment.

[0112] 8. Adjustment of the transmission gear adjustment plan

[0113] Based on the simulation results of the distribution transformer shift adjustment plan, the distribution transformer shift adjustment plan is adjusted until it meets the requirements, thereby guiding the distribution transformer shift adjustment.

[0114] 9.Location of local voltage weak points

[0115] According to the above final busbar-distribution transformer step-by-step adjustment scheme and its simulation results, combined with the abnormal distribution transformer and substation screening criteria in step 2, abnormal distribution transformers and substations are screened to locate local voltage weak points.

[0116] 10. Solution for managing weak points of local output voltage

[0117] Combined with typical cases of voltage management in the past, the optimal voltage management solution is output based on the problem type, investment, management results and other input guidance;

[0118] 11. Guide units to carry out voltage management

[0119] Based on the busbar-voltage step-by-step adjustment plan and the local voltage weak point management plan, we guide the target units to carry out voltage management and achieve an overall improvement in voltage quality.

[0120] Taking the distribution network in a certain area of ​​Hubei Province as an example, the distribution network contains 29,687 distribution transformers that need to be adjusted, affecting 1,577,190 users. Combined with the multi-channel comprehensive improvement method of the distribution network voltage qualification rate in the present invention, the voltage quality of the distribution network in the target area is improved. The key indicators of the area before and after the transformation are shown in Table 1:

[0121] Table 1 Statistics of key indicators before and after the transformation of distribution transformers in a certain area of ​​Hubei Province

[0122]

[0123] It can be seen from the contents in Table 1 that after the gear adjustment scheme of the present invention is applied, the heavy overload rate of the distribution transformer, the light no-load rate of the distribution transformer, and the distribution transformer / user voltage qualification rate are greatly reduced, the number of user complaints is significantly reduced, and the voltage quality within the unit can be significantly improved.

[0124] The embodiment of the present application provides a system for comprehensively improving the voltage qualification rate of a distribution network through multiple channels, including a memory and a processor, wherein the memory includes a program of a method for comprehensively improving the voltage qualification rate of a distribution network through multiple channels, and when the program of the method for comprehensively improving the voltage qualification rate of a distribution network through multiple channels is executed by the processor, the following steps are implemented: data collection, taking a single bus in a unit and its connected distribution transformers and users as research objects, collecting voltage data of all bus low-voltage sides, distribution transformer low-voltage sides, and user sides at all times in the unit; defining relevant thresholds, screening distribution transformers and users with abnormal voltage in the target unit; outputting a bus adjustment plan, screening abnormal distribution transformers according to abnormal distribution transformer screening standards, setting adjustment criteria to carry out bus adjustment; simulating the effectiveness of the bus adjustment plan; adjusting the bus adjustment plan, adjusting the bus adjustment plan based on the simulation results of the bus adjustment plan until the requirements are met, thereby guiding the bus adjustment; outputting a bus adjustment plan, filtering abnormal distribution transformers according to abnormal distribution transformer screening standards, and setting adjustment criteria to carry out bus adjustment; Output distribution transformer adjustment plan, select abnormal substations after bus adjustment according to abnormal substation screening standards, set adjustment criteria to carry out distribution transformer adjustment; simulate the effectiveness of distribution transformer adjustment plan; adjust the distribution transformer adjustment plan, based on the simulation results of the distribution transformer adjustment plan, adjust the distribution transformer adjustment plan until the requirements are met, and then guide the distribution transformer adjustment; locate local voltage weak points, according to the above-mentioned final version of the bus-distribution transformer step-by-step adjustment plan and its simulation results, combined with the abnormal distribution transformer and substation screening standards to select abnormal distribution transformers and substations, and locate local voltage weak points; output local voltage weak point control plan, combined with historical typical cases of voltage control, according to the problem type, investment, and control effect of the investment guidance output optimal voltage control plan; guide units to carry out voltage control, based on the bus-voltage step-by-step adjustment plan and the local voltage weak point control plan, guide the target units to carry out voltage control and achieve comprehensive improvement of voltage quality.

[0125] An embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method for comprehensively improving the voltage qualification rate of a distribution network through multiple channels as described above are implemented.

[0126] 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 include computer-usable program code.

[0127] 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 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0128] 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.

[0129] 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.

[0130] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0131] 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.

[0132] 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 tape 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.

[0133] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A multi-channel comprehensive method for improving the voltage qualification rate of a distribution network, characterized in that: The steps include: Data collection, taking a single busbar and its connected distribution transformer and users within the unit as the research object, collecting voltage data on the low-voltage side of all buses, distribution transformers, and users at all times within the unit; Define relevant thresholds to filter out abnormal voltage distribution transformers and users within the target unit; Output busbar adjustment plan, select abnormal distribution transformers according to abnormal distribution transformer screening criteria, set adjustment criteria and carry out busbar adjustment; Simulation of the effectiveness of busbar adjustment scheme; Busbar adjustment scheme adjustment: Based on the busbar adjustment scheme simulation results, adjust the busbar adjustment scheme until it meets the requirements, thereby guiding the busbar adjustment; Output distribution transformer adjustment plan, select abnormal areas after busbar adjustment according to abnormal area selection criteria, set adjustment criteria and carry out distribution transformer adjustment; Simulation of the effectiveness of the distribution transformer adjustment plan; Adjust the distribution transformer shifting scheme, based on the simulation results of the distribution transformer shifting scheme, adjust the distribution transformer shifting scheme until it meets the requirements, and then guide the distribution transformer shifting; Local voltage weak points are located. According to the above-mentioned final busbar-distribution transformer step-by-step adjustment scheme and its simulation results, abnormal distribution transformers and substations are screened in combination with the screening standards for abnormal distribution transformers and substations, and local voltage weak points are located. Output local voltage weak point treatment plan, combined with historical typical cases of voltage treatment, according to the problem type, investment, treatment effect of the guidance output optimal voltage treatment plan; Guide the units to carry out voltage management, based on the busbar-voltage step-by-step adjustment plan and the local voltage weak point management plan, guide the target units to carry out voltage management and achieve comprehensive improvement of voltage quality.

2. A multi-channel comprehensive method for improving the voltage qualification rate of a distribution network as claimed in claim 1, characterized in that: The data collection is specifically as follows: i ,PDY ni 、YDY ki Indicates that the subscripts n and k represent different distribution transformers and users respectively, and i represents different voltage collection times. The number of distribution transformers, users, and voltage collection in the unit is defined as N, K, and I respectively, and the value ranges of n, k, and i are as follows:

3. A multi-channel comprehensive method for improving the voltage qualification rate of a distribution network as claimed in claim 1, characterized in that: The definition of relevant thresholds, screening target unit voltage abnormal distribution transformer, user specific is, (1) Locating abnormal voltage distribution transformers: traverse the voltage data of all distribution transformers and count the number of abnormal points. In the above formula (2), PDY min Indicates the lower threshold of the distribution transformer voltage, PDY max Indicates the upper threshold of the distribution transformer voltage, PDYDY ni ,PDYGY ni PDYDYN is an intermediate variable used to indicate whether the nth distribution transformer exceeds the limit at the i-th point. The former is equal to 1, indicating that the distribution transformer voltage exceeds the lower limit, and the latter is equal to 1, indicating that the distribution transformer voltage exceeds the upper limit. n Indicates the number of points where the voltage of the nth distribution transformer exceeds the lower limit, PDYGYN n Indicates the number of points where the voltage of the nth distribution transformer exceeds the upper limit. The screening criteria for abnormal voltage distribution transformers are based on PDYDYN n ,PDYGYN n The value of is determined as shown in the following formula. In the above formula (4), α represents the threshold value of abnormal distribution transformer voltage points, PDYDY n ,PDYGY n It is an intermediate variable, which is used to indicate whether the nth distribution transformer is defined as a low-voltage or high-voltage abnormal distribution transformer. If it is equal to 1, it is defined as a voltage abnormal distribution transformer, and if it is equal to 0, it is defined as a normal distribution transformer. (2) Locate the abnormal voltage area, traverse the voltage data of all collection points in all areas and count the number of abnormal points. In the above formula (6), TDY min Indicates the lower voltage threshold of the substation, TDY max Indicates the upper voltage threshold of the substation, TDYDY ki TDYGY ki It is an intermediate variable used to indicate whether the kth station exceeds the limit at the i-th point. 1 indicates that the limit is exceeded, and 0 indicates that the limit is not exceeded. k TDYGYN k Indicates the number of voltage limit points in the kth transformer area. The screening criteria for abnormal voltage distribution transformers are based on TDYDNY k TDYGYN k The value of is determined as shown in the following formula: In the above formula (8), β represents the threshold value of abnormal distribution transformer voltage points, TDYDY k TDYGY k It is an intermediate variable used to indicate whether the kth substation is defined as a voltage abnormality substation. If it is equal to 1, it is defined as a voltage abnormality substation, and if it is equal to 0, it is defined as a normal substation.

4. A multi-channel comprehensive method for improving the voltage qualification rate of a distribution network as claimed in claim 1, characterized in that: The output busbar adjustment plan selects abnormal distribution transformers according to the abnormal distribution transformer selection criteria, and sets the adjustment criteria to carry out busbar adjustment as follows: In the above formula (10), γ represents the threshold judgment condition for bus adjustment, MXTD represents whether bus adjustment is to be carried out, 1 means bus adjustment needs to be carried out, and 0 means bus adjustment does not need to be carried out.

5. A multi-channel comprehensive method for improving the voltage qualification rate of a distribution network as claimed in claim 1, characterized in that: The simulation of the effectiveness of the busbar adjustment scheme is as follows: Model building Assuming that the number of variables of a single busbar that needs to be adjusted is N, combined with the random forest algorithm, based on MDY i ,PDY ni Establish feature engineering, MDY i represents the voltage of the target bus at time i, PDY ni Indicates the voltage of the nth distribution transformer connected to the target bus at time i. i As the input of the model, PDY ni The busbar adjustment scheme effectiveness simulation model is constructed with one-dimensional input and N-dimensional output as the output of the model; Model Training Conduct model training and explore MDY i With PDY ni The corresponding relationship between them; Simulation of the effectiveness of the transmission gear adjustment plan Using the trained model, the low-voltage side voltage of the bus after the preliminary bus adjustment plan is implemented is input. For a five-speed transformer, the voltage changes by 2.5% per gear, or for a three-speed transformer, the voltage changes by 5% per gear. The model automatically outputs all the distribution transformer voltage data of the bus after the adjustment.

6. A multi-channel comprehensive method for improving the voltage qualification rate of a distribution network as claimed in claim 1, characterized in that: According to the abnormal area screening criteria, the abnormal areas after busbar adjustment are screened, and the adjustment criteria are set to carry out distribution transformer adjustment. Single distribution transformer adjustment process: In the above formula (11), θ represents the threshold judgment condition for carrying out the distribution transformer adjustment, PBTD represents whether to carry out the distribution transformer adjustment, and PBTD is equal to 1, indicating that the distribution transformer adjustment needs to be carried out, and 0, indicating that the distribution transformer adjustment does not need to be carried out.

7. A multi-channel comprehensive method for improving the voltage qualification rate of a distribution network as claimed in claim 1, characterized in that: The simulation of the effectiveness of the distribution transformer adjustment plan is as follows: (1) Model establishment Assuming that the number of users served by a single transformer that needs to be adjusted is M, combined with the random forest algorithm, based on PDY i 、YDY mi Building feature engineering, PDY i Indicates the voltage of the target distribution transformer at time i, YDY mi It represents the voltage of the mth user connected to the target distribution transformer at time i. i As the input of the model, YDY mi The output of the model is regarded as a one-dimensional input and M-dimensional output distribution transformer adjustment scheme effectiveness simulation model; (2) Model training Conduct model training and explore PDY i with YDY mi The corresponding relationship between them; (3) Simulation of the effectiveness of the transmission gear adjustment plan Using the trained model, the voltage on the low-voltage side of the distribution transformer after the preliminary distribution transformer adjustment plan is implemented is input. The voltage is changed by 2.5% for a five-speed transformer or 5% for a three-speed transformer. The model automatically outputs the voltage data of all users carried by the distribution transformer after the adjustment.

8. A multi-channel comprehensive improvement system for distribution network voltage qualification rate, characterized in that: The invention comprises a memory and a processor, wherein the memory comprises a program of a method for comprehensively improving the voltage qualification rate of a distribution network through multiple channels, and when the program of the method for comprehensively improving the voltage qualification rate of a distribution network through multiple channels is executed by the processor, the following steps are implemented: data collection, taking a single bus in a unit and its connected distribution transformer and user as research objects, collecting voltage data of the low-voltage side of all buses, the low-voltage side of distribution transformers, and the user side at all times in the unit; Define relevant thresholds to screen out abnormal voltage distribution transformers and users within the target unit; output busbar adjustment plan, screen abnormal distribution transformers according to abnormal distribution transformer screening standards, set adjustment criteria to carry out busbar adjustment; simulate the effectiveness of busbar adjustment plan; adjust the busbar adjustment plan based on the simulation results of the busbar adjustment plan until the requirements are met, and then guide busbar adjustment; output distribution transformer adjustment plan, screen abnormal substations after busbar adjustment according to abnormal substation screening standards, set adjustment criteria to carry out distribution transformer adjustment; simulate the effectiveness of distribution transformer adjustment plan; adjust the distribution transformer adjustment plan based on the simulation results of the distribution transformer adjustment plan The final busbar-distribution transformer step-by-step adjustment scheme and its simulation results are used to select abnormal distribution transformers and substations, and local voltage weak points are located. The local voltage weak point control scheme is output. According to the typical cases of voltage control in the past, the optimal voltage control scheme is output according to the problem type, investment, and control effect. The unit is guided to carry out voltage control. Based on the busbar-voltage step-by-step adjustment scheme and the local voltage weak point control scheme, the target unit is guided to carry out voltage control to achieve comprehensive improvement of voltage quality.

9. 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 the processor, the steps of the multi-channel comprehensive method for improving the voltage qualification rate of the distribution network as described in any one of claims 1-7 are implemented.

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