A power distribution network voltage qualified rate multi-channel comprehensive improvement method and system and medium

Abstract

The application relates to a power distribution network voltage qualified rate multi-channel comprehensive improvement method and system and a medium, the method comprises the following steps: data collection; defining related thresholds, screening voltage abnormal distribution transformers and users in target units; outputting bus regulation schemes; bus regulation scheme effect simulation; bus regulation scheme adjustment; outputting distribution transformer regulation schemes; distribution transformer regulation scheme effect simulation; distribution transformer regulation scheme adjustment; local voltage weak point positioning; outputting local voltage weak point treatment schemes; and guiding units to carry out voltage treatment. The application can realize "calculation before regulation" of bus and distribution transformer regulation work, guarantee the effectiveness of regulation work and the safe and stable operation of a power grid.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of power grids, in particular to a power distribution network voltage qualified rate multi-channel comprehensive improvement method and system and a medium. BACKGROUND

[0002] The low-voltage problem in weak grid areas, the high-voltage problem in high-cable-rate areas, the voltage two-way out-of-limit problem of seasonal loads such as coal-to-electricity conversion and motor well pumping, and the higher voltage quality requirement of precision manufacturing industrial parks have become more and more prominent. At the same time, the social and economic development has put forward higher requirements for power supply voltage management. At present, the voltage management of various network companies depends heavily on manual experience, and the mode adopted is "problem first, management later", which has become more and more difficult to meet the demand for high-standard voltage quality.

[0003] At present, the voltage management mode depends largely on the experience of operators, and different operators may lead to different results, increasing uncertainty. At the same time, the existing voltage management mode cannot achieve pre-evaluation of management effectiveness, which may lead to unsatisfactory management effect and low capital utilization rate. In addition, the current "problem first, management later" management mode has a certain lag, and the user complaint rate caused by low voltage problems is high. SUMMARY

[0004] The purpose of the embodiments of the application is to provide a power distribution network voltage qualified rate multi-channel comprehensive improvement method, system and medium, which can realize "calculation first and adjustment later" of bus and distribution transformer adjustment work, and guarantee the effectiveness of adjustment work and safe and stable operation of the power grid.

[0005] To achieve the above purpose, the application provides the following technical scheme:

[0006] In a first aspect, the embodiments of the application provide a power distribution network voltage qualified rate multi-channel comprehensive improvement method, which includes the following steps:

[0007] Data collection: taking a single bus and its connected distribution transformer and users in a unit as the research object, collecting voltage data of all buses, distribution transformers and user sides at all times in the unit;

[0008] Defining related thresholds, screening voltage abnormal distribution transformers and users in the target unit;

[0009] Outputting a bus adjustment scheme, screening abnormal distribution transformers according to the abnormal distribution transformer screening standard, and setting adjustment criteria to carry out bus adjustment;

[0010] Bus adjustment scheme effectiveness simulation;

[0011] Bus adjustment scheme adjustment: based on the simulation results of the bus adjustment scheme, the bus adjustment scheme is adjusted until the requirements are met, thereby guiding the bus adjustment;

[0012] Output distribution transformer regulation scheme, according to the abnormal substation screening standard, screen the bus regulation abnormal substation, set the regulation criterion to carry out distribution transformer regulation;

[0013] Distribution transformer regulation scheme simulation;

[0014] Distribution transformer regulation scheme adjustment, based on the simulation results of the distribution transformer regulation scheme, adjust the distribution transformer regulation scheme until the requirements are met, and then guide the distribution transformer regulation;

[0015] Local voltage weak point positioning, according to the final version of the bus-distribution transformer step-by-step regulation scheme and its simulation results, combined with the abnormal distribution transformer and substation screening standard, screen the abnormal distribution transformer and substation, and locate the local voltage weak point;

[0016] Output local voltage weak point treatment scheme, combined with historical voltage treatment typical cases, according to its problem type, investment, treatment effect input, guide output the optimal voltage treatment scheme;

[0017] Guiding units to carry out voltage treatment, based on the bus-voltage step-by-step regulation scheme and the local voltage weak point treatment scheme, guiding the target unit to carry out voltage treatment, and realizing the comprehensive improvement of voltage quality.

[0018] The data collection is specifically MDY i , PDY ni , YDY ki , the subscripts n, k represent different distribution transformers and users, i represents different voltage collection time, the number of distribution transformers, users and voltage collection in the unit is defined as N, K and I, respectively, and the value range of n, k, i is as follows:

[0019]

[0020] The definition of related threshold values for screening voltage abnormal distribution transformers and users in the target unit is as follows:

[0021] (1) Voltage abnormal distribution transformer positioning, traverse all distribution transformer voltage data and count the number of abnormal points,

[0022]

[0023]

[0024] In the above formula (2), PDY min represents the lower limit threshold of the distribution transformer voltage, PDY max represents the upper limit threshold of the distribution transformer voltage, PDYDY ni , PDYGY niPDYDYN is an intermediate variable used to represent whether the n-th distribution transformer at the i-th point position is out of limit, the former equals to 1 indicating that the distribution transformer voltage is below the lower limit, and the latter equals to 1 indicating that the distribution transformer voltage is above the upper limit, PDYDYN n PDYGYN represents the number of voltage lower limit point positions of the n-th distribution transformer, n PDYGYN represents the number of voltage lower limit point positions of the n-th distribution transformer, n n The screening criteria of the voltage abnormal distribution transformer is determined according to the values of PDYDYN n , PDYGYN n , and the specific formula is as follows.

[0025]

[0026]

[0027] In the above formula (4), a represents the threshold value of the number of abnormal point positions of the distribution transformer voltage, PDYDYN n , PDYGYN n is an intermediate variable used to represent whether the n-th distribution transformer is defined as a low-voltage or high-voltage abnormal distribution transformer, equals to 1 indicating that it is defined as a voltage abnormal distribution transformer, and equals to 0 indicating that it is defined as a normal distribution transformer,

[0028] (2) Voltage abnormal transformer positioning, traversing all transformer voltage data of all collection points and counting the number of abnormal point positions.

[0029]

[0030]

[0031] In the above formula (6), TDYDYN min represents the lower limit threshold value of the transformer voltage, TDYDYN max represents the upper limit threshold value of the transformer voltage, TDYDYN ki , TDYGYN ki is an intermediate variable used to represent whether the k-th transformer at the i-th point position is out of limit, equals to 1 indicating that it is out of limit, and equals to 0 indicating that it is not out of limit, TDYDNY k , TDYGYN k represents the number of voltage out-of-limit point positions of the k-th transformer. The screening criteria of the voltage abnormal distribution transformer is determined according to the values of TDYDNY k , TDYGYN k , and the specific formula is as follows,

[0032]

[0033]

[0034] In the above formula (8), β represents the threshold value of the number of abnormal point positions of the transformer voltage, TDYDNY k, TDYGY k is an intermediate variable used to represent whether the kth substation area is defined as a voltage abnormal substation area, equal to 1 indicating being defined as a voltage abnormal substation area, and equal to 0 being defined as a normal substation area.

[0035] The output bus regulation scheme, according to the abnormal distribution transformer screening standard, screens abnormal distribution transformers, and sets the regulation criterion to carry out bus regulation, which is specifically as follows:

[0036]

[0037] In the above formula (10), γ represents the threshold judgment condition for carrying out bus regulation, MXTD represents whether to carry out bus regulation, equal to 1 indicating that bus regulation needs to be carried out, and equal to 0 indicating that bus regulation does not need to be carried out.

[0038] The bus regulation scheme effectiveness simulation is specifically,

[0039] Modeling

[0040] Assuming that a single distribution transformer to be regulated has N distribution transformers, combining the random forest algorithm, based on MDY i , PDY ni , MDY i , and PDY ni , the model is established. i , and PDY ni , a one-dimensional input and N-dimensional output bus regulation scheme effectiveness simulation model is constructed.

[0041] Model training

[0042] Model training is carried out to explore the corresponding relationship between MDY i and PDY ni .

[0043] Distribution transformer regulation scheme effectiveness simulation

[0044] Using the trained model, input the bus low-voltage side voltage after the preliminary bus regulation scheme is carried out, and according to the five-step transformer change of 2.5% or the three-step transformer change of 5%, the model automatically outputs the voltage data of all distribution transformers after regulation.

[0045] According to the abnormal substation area screening standard, the abnormal substation area after bus regulation is screened, and the regulation criterion is set to carry out distribution transformer regulation, which is specifically as follows:

[0046] Single distribution transformer regulation process:

[0047]

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

[0049] The simulation results of the distribution transformer adjustment scheme are as follows:

[0050] (1) Model establishment

[0051] Assuming a single transformer requiring relocation serves M users, and combining the random forest algorithm with PDY... i YDY mi Establish feature engineering, PDY i YDY represents the voltage of the target transformer at time i. mi This represents the voltage of the m-th user connected to the target distribution transformer at time i, and PDY i Treating YDY as the input to the model mi The output of the model is regarded as the one-dimensional input and the output of the M-dimensional distribution transformer adjustment scheme to construct a simulation model of the effectiveness of the scheme.

[0052] (2) Model Training

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

[0054] (3) Simulation of the effectiveness of the distribution transformer adjustment scheme

[0055] Using the trained model, input the low-voltage side voltage of the distribution transformer after the initial distribution transformer adjustment scheme is implemented. If the voltage is changed by 2.5% for a five-stage transformer or by 5% for a three-stage transformer, the model will automatically output the voltage data of all users connected to the distribution transformer after the adjustment.

[0056] Secondly, this application provides a multi-channel integrated improvement system for distribution network voltage qualification rate, including a memory and a processor. The memory includes a program for a multi-channel integrated improvement method for distribution network voltage qualification rate. When the program for the multi-channel integrated improvement method for distribution network voltage qualification rate is executed by the processor, it implements the following steps: data collection, taking a single busbar within a unit and its connected transformers and users as research objects, collecting voltage data of the low-voltage side of all busbars, the low-voltage side of transformers, and the user side at all times within the unit; defining relevant thresholds to screen transformers and users with abnormal voltage within the target unit; outputting a busbar adjustment scheme, screening abnormal transformers according to the abnormal transformer screening criteria, setting adjustment criteria to carry out busbar adjustment; simulating the effectiveness of the busbar adjustment scheme; adjusting the busbar adjustment scheme based on the simulation results until the requirements are met, thereby guiding busbar adjustment. The system outputs transformer relocation plans, filters abnormal transformer areas after busbar relocation based on abnormal transformer area screening criteria, and sets relocation criteria for transformer relocation; simulates the effectiveness of the transformer relocation plan; adjusts the transformer relocation plan based on the simulation results until the requirements are met, thereby guiding transformer relocation; locates local voltage weak points, filters abnormal transformers and transformer areas based on the final version of the busbar-transformer step-by-step relocation plan and its simulation results, and locates local voltage weak points; outputs local voltage weak point remediation plans, combines historical typical voltage remediation cases, and guides the output of the optimal voltage remediation plan based on the problem type, investment, and remediation effectiveness; and guides units to carry out voltage remediation, based on the busbar-voltage step-by-step relocation plan and local voltage weak point remediation plans, to guide target units to carry out voltage remediation and achieve a comprehensive improvement in voltage quality.

[0057] Thirdly, embodiments of this application provide a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the multi-channel comprehensive improvement method for distribution network voltage qualification rate as described above.

[0058] Compared with the prior art, the beneficial effects of the present invention are:

[0059] 1. This application sets quantitative analysis indicators for voltage over-limit situations of distribution transformers and users, supporting the early assessment of voltage anomalies and transforming the traditional "problem first, then treatment" voltage management model into "early detection and early prevention".

[0060] 2. This application uses the random forest algorithm to calculate the voltage qualification rate and over-limit situation after voltage regulation, so as to realize the pre-evaluation of the adjustment effect.

[0061] 3. This application enables the "calculation before adjustment" of busbar and distribution transformer adjustment work, ensuring the effectiveness of adjustment work and the safe and stable operation of the power grid.

[0062] 4. This application improves voltage quality by following the "overall first, then local" approach to voltage management, which can achieve high voltage management results with relatively low cost. Attached Figure Description

[0063] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0064] Figure 1 This is a flowchart of the method of the present invention. Detailed Implementation

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

[0066] The terms “comprising,” “including,” or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

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

[0068] like Figure 1 The proposed method constructs a precise identification method for the actual operating tap position of distribution transformers, including data collection, voltage weakness point location, overall busbar-transformer tap adjustment scheme, simulation of the effectiveness of the tap adjustment scheme, feedback and correction, local voltage weakness point location, local voltage mitigation scheme, and guidance for various units to carry out voltage mitigation. The overall flowchart is as follows: Figure 1 As shown:

[0069] The specific process is as follows:

[0070] 1. Data collection

[0071] Taking a single busbar in a unit and its connected distribution transformers and users as the research object, collecting voltage data of all buses at low voltage side, distribution transformers at low voltage side and user side at all times, respectively denoted by MDY i , PDY ni , YDY ki , the subscripts n, k respectively represent different distribution transformers and users, 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 range of n, k, i is as follows:

[0072]

[0073] Defining related thresholds, screening voltage abnormal distribution transformers and users in the target unit

[0074] (1) Voltage abnormal distribution transformer positioning, traversing voltage data of all distribution transformers at all collection points and counting the number of abnormal points.

[0075]

[0076]

[0077] In the above formula (2), PDY min represents the lower threshold of distribution transformer voltage, PDY max represents the upper threshold of distribution transformer voltage, PDYDY ni , PDYGY ni are intermediate variables used to represent whether the nth distribution transformer at the ith point exceeds the limit, the former equals 1 indicating that the distribution transformer voltage exceeds the lower limit, and the latter equals 1 indicating that the distribution transformer voltage exceeds the upper limit, PDYDYN n represents the number of voltage lower limit points of the nth distribution transformer, and PDYGYN n represents the number of voltage upper limit points of the nth distribution transformer. The screening criteria of voltage abnormal distribution transformers are determined according to the values of PDYDYN n , PDYGYN n , which are specifically shown in the following formula.

[0078]

[0079]

[0080] In the above formula (4), α represents the threshold of the number of abnormal points of distribution transformer voltage, PDYDY n , PDYGY n are intermediate variables used to represent whether the nth distribution transformer is defined as a low-voltage or high-voltage abnormal distribution transformer, equal to 1 indicating that it is defined as a voltage abnormal distribution transformer, and equal to 0 indicating that it is defined as a normal distribution transformer.

[0081] (2) Voltage abnormal substation area positioning, traversing all substation area all acquisition point voltage data and statistics non-normal point quantity.

[0082]

[0083]

[0084] In the above formula (6), TDY min represents the lower threshold of substation voltage, TDY max represents the upper threshold of substation voltage, TDYDY ki , TDYGY ki is an intermediate variable, which is used to represent whether the kth substation exceeds the limit at the ith point, equal to 1 indicates exceeding the limit, and equal to 0 indicates not exceeding the limit, TDYDNY k , TDYGYN k represents the number of voltage exceeding point of the kth substation. The screening criteria of voltage abnormal distribution transformer is determined according to the value of TDYDNY k , TDYGYN k , which is specifically shown in the following formula.

[0085]

[0086]

[0087] In the above formula (8), β represents the threshold of distribution transformer voltage abnormal point quantity, TDYDY k , TDYGY k is an intermediate variable, which is used to represent whether the kth substation is defined as a voltage abnormal substation, equal to 1 indicates defined as a voltage abnormal substation, and equal to 0 defined as a normal substation.

[0088] Output bus regulation scheme

[0089] According to the abnormal distribution transformer screening criteria in step 2, the abnormal distribution transformer is screened, and the regulation criterion is set to carry out bus regulation, which is specifically as follows:

[0090]

[0091] In the above formula (10), γ represents the threshold judgment condition of carrying out bus regulation, MXTD represents whether to carry out bus regulation, equal to 1 indicates that bus regulation needs to be carried out, and equal to 0 indicates that bus regulation does not need to be carried out.

[0092] Bus regulation scheme effect simulation

[0093] (1) Model establishment

[0094] Assuming that the number of distribution transformers carried by a single bus to be regulated is N, combining the random forest algorithm, based on MDY iPDY ni Establish feature engineering, MDY i PDY represents the voltage of the target bus at time i. ni This represents the voltage of the nth distribution transformer connected to the target bus at time i, and MDY i Treating PDY as input to the model ni The bus adjustment scheme effectiveness simulation model is constructed by treating the output of the model as a one-dimensional input and an N-dimensional output.

[0095] Model training

[0096] Conduct model training and explore MDY i With PDY ni Correspondence between

[0097] Simulation of the effectiveness of the distribution transformer adjustment scheme

[0098] Using the trained model, input the low-voltage side voltage of the bus after the initial bus adjustment scheme is implemented, and change one step of the five-step transformer by 2.5% (or one step of the three-step transformer by 5%). The model will automatically output the voltage data of all distribution transformers connected to the bus after the adjustment.

[0099] 5. Adjustment of busbar spacing scheme

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

[0101] 6. Output transformer range adjustment scheme

[0102] Based on the abnormal transformer area screening criteria in step 2, abnormal transformer areas are screened after busbar re-registration. Re-registration criteria are then set to carry out transformer re-registration. The following is the re-registration process for a single transformer:

[0103]

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

[0105] 7. Simulation of the effectiveness of the distribution transformer adjustment scheme

[0106] (1) Model establishment

[0107] Assuming a single transformer requiring relocation serves M users, and combining the random forest algorithm with PDY... i YDY mi Establish feature engineering, PDY i YDY represents the voltage of the target transformer at time i. mi This represents the voltage of the m-th user connected to the target distribution transformer at time i, and PDYi As the input of the model, YDY mi As the output of the model, a one-dimensional input and an M-dimensional output are constructed, and the effect simulation model of the matching transformer regulation scheme is constructed.

[0108] (2) Model training

[0109] The model is trained to explore the corresponding relationship between PDY i and YDY mi

[0110] (3) Effect simulation of matching transformer regulation scheme

[0111] Using the trained model, the low-voltage side voltage of the matching transformer after the preliminary matching transformer regulation scheme is input, and the one-step change of the five-step transformer is 2.5% (or the one-step change of the three-step transformer is 5%), and the model automatically outputs the voltage data of all users carried by the matching transformer after regulation.

[0112] 8. Matching transformer regulation scheme adjustment

[0113] Based on the simulation results of the matching transformer regulation scheme, the matching transformer regulation scheme is adjusted until the requirements are met, thereby guiding the matching transformer regulation.

[0114] 9. Local voltage weak point positioning

[0115] According to the final version of the busbar-transformer step-by-step regulation scheme and its simulation results, combined with the abnormal transformers and distribution areas in step 2, the abnormal transformers and distribution areas are screened according to the abnormal transformer and distribution area screening standard, and the local voltage weak point is positioned.

[0116] 10. Output local voltage weak point treatment scheme

[0117] Combined with historical voltage treatment typical cases, according to the problem type, investment, treatment effect and other inputs, the optimal voltage treatment scheme is output;

[0118] 11. Guidance for units to carry out voltage treatment

[0119] Based on the busbar-voltage step-by-step regulation scheme and the local voltage weak point treatment scheme, the target unit is guided to carry out voltage treatment, and the voltage quality is comprehensively improved.

[0120] Taking a power distribution network in Hubei Province as an example, the power distribution network contains 29687 transformers that need to be regulated, and affects 1577190 households that exceed the limit. Combined with the multi-channel comprehensive improvement method of the power distribution network voltage qualification rate in the present application, the voltage quality of the target area power distribution network is improved, and the key indicators of the area before and after the transformation are shown in Table 1:

[0121] Table 1 Key indicators of Hubei Province before and after the transformation of the transformer

[0122] ​

[0123] From the content in Table 1, it can be seen that after the application of the voltage regulation scheme of the application, the distribution transformer heavy overload rate, the distribution transformer light no-load rate, and the distribution transformer / user voltage qualified rate are all greatly reduced, the number of user complaints is significantly reduced, and the voltage quality in the unit can be significantly improved.

[0124] The embodiment of the application provides a power distribution network voltage qualified rate multi-channel comprehensive improvement system, comprising a memory and a processor, the memory comprises a power distribution network voltage qualified rate multi-channel comprehensive improvement method program, and the power distribution network voltage qualified rate multi-channel comprehensive improvement method program is executed by the processor to realize the following steps: data collection, taking a single busbar in a unit and distribution transformers and users connected to the busbar as research objects, collecting voltage data of all busbars on the low-voltage side, distribution transformers on the low-voltage side and user sides at all times in the unit; defining related thresholds, screening voltage abnormal distribution transformers and users in the target unit; outputting a busbar regulation scheme, screening abnormal distribution transformers according to the abnormal distribution transformer screening standard, and setting regulation criteria to carry out busbar regulation; busbar regulation scheme effectiveness simulation; busbar regulation scheme adjustment, adjusting the busbar regulation scheme based on the simulation results of the busbar regulation scheme until the requirements are met, and then guiding the busbar regulation; outputting a distribution transformer regulation scheme, screening abnormal distribution areas after busbar regulation according to the abnormal distribution area screening standard, and setting regulation criteria to carry out distribution transformer regulation; distribution transformer regulation scheme effectiveness simulation; distribution transformer regulation scheme adjustment, adjusting the distribution transformer regulation scheme based on the simulation results of the distribution transformer regulation scheme until the requirements are met, and then guiding the distribution transformer regulation; local voltage weak point positioning, positioning the local voltage weak point according to the final version of the busbar-distribution transformer step-by-step regulation scheme and the simulation results thereof, in combination with the abnormal distribution transformers and distribution areas screened according to the abnormal distribution transformer and distribution area screening standard; outputting a local voltage weak point treatment scheme, inputting an optimal voltage treatment scheme according to the problem type, investment and treatment effectiveness of the historical past voltage treatment typical cases; guiding the unit to carry out voltage treatment, guiding the target unit to carry out voltage treatment based on the busbar-voltage step-by-step regulation scheme and the local voltage weak point treatment scheme, and realizing comprehensive improvement of voltage quality.

[0125] The embodiment of the application provides a computer readable storage medium, and the computer readable storage medium stores a computer program.

[0126] Those skilled in the art should understand that the embodiments of the application can be provided as a method, a system or a computer program product. Therefore, the application can adopt a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware aspects. Moreover, the application can adopt a computer program product implemented on one or more computer readable storage media containing computer usable program codes, including but not limited to disk memory, CD-ROM, optical memory, etc.

[0127] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks Figure 1 means for functionally implementing the steps listed in the flowchart block or blocks.

[0128] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks Figure 1 means for functionally implementing the steps listed in the flowchart block or blocks.

[0129] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 one or more flowcharts and / or blocks Figure 1 means for functionally implementing the steps listed in the flowchart block or blocks.

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

[0131] The memory can include non-persistent memory and / or persistent memory, such as flash memory, read-only memory (ROM), and / or volatile or non-volatile random access memory (RAM), among others. The memory is an example of computer readable media.

[0132] Computer-readable media includes permanent and non-permanent, movable and non-movable media that can implement information storage by any method or technology. The 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 technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible by a computing device. According to the definition herein, computer-readable media does not include transitory media such as modulated data signals and carriers.

[0133] The above only describes the embodiments of the present application and is not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various modifications and changes. 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 method for multi-channel comprehensive improvement of power distribution network voltage eligibility rate, characterized in that, It comprises the following steps: Data collection, taking a single busbar in a unit and its connected distribution transformers and users as the research object, collecting voltage data of all buses, low-voltage sides of distribution transformers and user sides at all times; Defining relevant thresholds to screen voltage abnormal distribution transformers and users in the target unit; Outputting busbar regulation scheme, screening abnormal distribution transformers according to abnormal distribution transformer screening criteria, and setting regulation criteria to carry out busbar regulation; Busbar regulation scheme effectiveness simulation; Busbar regulation scheme adjustment, based on the simulation results of the busbar regulation scheme, adjusting the busbar regulation scheme until the requirements are met, and then guiding the busbar regulation; Outputting distribution transformer regulation scheme, screening abnormal distribution areas after busbar regulation according to abnormal distribution area screening criteria, and setting regulation criteria to carry out distribution transformer regulation; Distribution transformer regulation scheme effectiveness simulation; Distribution transformer regulation scheme adjustment, based on the simulation results of the distribution transformer regulation scheme, adjusting the distribution transformer regulation scheme until the requirements are met, and then guiding the distribution transformer regulation; Local voltage weak point positioning, according to the final version of the busbar-distribution transformer step-by-step regulation scheme and its simulation results, combined with abnormal distribution transformers and distribution areas screened according to abnormal distribution transformer and distribution area screening criteria, positioning local voltage weak points; Outputting local voltage weak point treatment scheme, combining historical voltage treatment typical cases, according to their problem types, investment, treatment effectiveness, inputting the optimal voltage treatment scheme to guide the output; Guiding the unit to carry out voltage treatment, based on the busbar-voltage step-by-step regulation scheme and the local voltage weak point treatment scheme, guiding the target unit to carry out voltage treatment, and realizing comprehensive improvement of voltage quality.

2. The method of claim 1, wherein the method further comprises: The data collection is respectively represented by MDY i , PDY ni , YDY ki , wherein the subscripts n, k respectively represent different distribution transformers and users, i represents different voltage collection time points, the number of distribution transformers, users and voltage collection within a unit is respectively defined as N, K and I, and the value range of n, k, i is as follows:

3. The method of claim 1, wherein the method further comprises: Said defining relevant thresholds to screen voltage abnormal distribution transformers and users in the target unit specifically, (1) Voltage abnormal distribution transformer positioning, traversing all distribution transformer voltage data of all collection points and counting the number of abnormal points, In the above formula (2), PDY min represents the lower threshold of the distribution voltage, PDY max represents the upper threshold of the distribution voltage, PDYDY ni , PDYGY ni is an intermediate variable used to represent whether the nth distribution voltage exceeds the limit at the ith point, and the former equals 1 to indicate that the distribution voltage exceeds the lower limit, and the latter equals 1 to indicate that the distribution voltage exceeds the upper limit, PDYDYN n represents the number of point positions at which the voltage of the nth distribution exceeds the lower limit, PDYGYN n represents the number of point positions at which the voltage of the nth distribution exceeds the upper limit. The screening criteria for voltage abnormal distribution are determined according to the values of PDYDYN n , PDYGYN n , and are specifically shown in the following formula. In the above (4), a represents a threshold value of the number of abnormal points of the distribution voltage, PDYDY n , PDYGY n is an intermediate variable used to represent whether the nth distribution is defined as a low-voltage or high-voltage abnormal distribution, and is equal to 1 if it is defined as an abnormal distribution of voltage, and is equal to 0 if it is defined as a normal distribution, (2) Voltage abnormal distribution area positioning, traversing all distribution area voltage data of all collection points and counting the number of abnormal points. In the above formula (6), TDY min represents the lower threshold of the substation voltage, TDY max represents the upper threshold of the substation voltage, TDYDY ki , TDYGY ki is an intermediate variable, which represents whether the kth substation is out of limit at the ith point, and equals to 1 if it is out of limit, and equals to 0 if it is not out of limit, TDYDNY k , TDYGYN k represents the number of voltage out-of-limit point of the kth substation. The screening criteria of the voltage abnormality distribution transformer is determined according to the value of TDYDNY k , TDYGYN k , and is specifically shown in the following formula. In the above (8), β represents a threshold value of the number of abnormal point positions of the distribution voltage, TDYDY k , TDYGY k is an intermediate variable used to represent whether the kth substation area is defined as a voltage abnormal substation area, and is equal to 1 to represent being defined as a voltage abnormal substation area, and is equal to 0 to be defined as a normal substation area.

4. The method of claim 1, wherein the method further comprises: Said outputting busbar regulation scheme, screening abnormal distribution transformers according to abnormal distribution transformer screening criteria, and setting regulation criteria to carry out busbar regulation specifically as follows: In the above formula (10), γ represents the threshold judgment condition for carrying out busbar regulation, MXTD represents whether to carry out busbar regulation, equal to 1 represents that busbar regulation needs to be carried out, and equal to 0 represents that busbar regulation does not need to be carried out.

5. The method for comprehensively improving the voltage qualification rate of a distribution network through multiple channels as described in claim 1, characterized in that, Said busbar regulation scheme effectiveness simulation specifically, Model establishment Assuming that the number of transformers connected to a single bus to be regulated is N, combining 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 , represents the voltage of the nth transformer connected to the target bus at time i, MDY i , is regarded as the input of the model, PDY ni , is regarded as the output of the model to construct a bus regulation scheme performance simulation model with one-dimensional input and N-dimensional output; Model training Developing a model to explore the relationship between MDY i and PDY ni ; Distribution transformer regulation scheme effectiveness simulation Using the trained model, inputting the busbar low-voltage side voltage after the preliminary busbar regulation scheme is carried out, changing one grade by 2.5% for five-grade transformers or changing one grade by 5% for three-grade transformers, and the model automatically outputs the voltage data of all distribution transformers carried by the busbar after regulation.

6. The method of claim 1, wherein the method further comprises: Said outputting distribution transformer regulation scheme, screening abnormal distribution areas after busbar regulation according to abnormal distribution area screening criteria, and setting regulation criteria to carry out distribution transformer regulation specifically as follows: Single distribution transformer regulation process: In the above formula (11), θ represents the threshold judgment condition for carrying out distribution transformer regulation, PBTD represents whether to carry out distribution transformer regulation, equal to 1 represents that distribution transformer regulation needs to be carried out, and equal to 0 represents that distribution transformer regulation does not need to be carried out.

7. The method for comprehensively improving the voltage qualification rate of a distribution network through multiple channels as described in claim 1, characterized in that, Said distribution transformer regulation scheme effectiveness simulation specifically, (1) Model establishment Assuming that the number of users connected to a single adjustable transformer is M, combined with the random forest algorithm, based on PDY i , YDY mi Establish feature engineering, PDY i represents the voltage of the target transformer at time i, YDY mi represents the voltage of the mth user connected to the target transformer at time i, PDY i is regarded as the input of the model, and YDY mi is regarded as the output of the model to construct a one-dimensional input and M-dimensional output transformer regulation scheme effectiveness simulation model; (2) Model training Developing a model to explore the relationship between PDY i and YDY mi ; (3) Distribution transformer regulation scheme effectiveness simulation Using the trained model, input the voltage of the low-voltage side of the distribution transformer after the preliminary distribution and transformation scheme, change one grade of the five-grade transformer by 2.5% or one grade of the three-grade transformer by 5%, and the model automatically outputs the voltage data of all users carried by the distribution transformer after transformation.

8. A power distribution network voltage quality rate multi-channel comprehensive improvement system, characterized in that, The power distribution network voltage qualification rate multi-channel comprehensive improvement method includes a memory and a processor, the memory includes a program for the power distribution network voltage qualification rate multi-channel comprehensive improvement method, and the program is executed by the processor to realize the following steps: data collection, taking a single bus and its connected distribution transformer and users in a unit as the research object, collecting all bus low-voltage side, distribution transformer low-voltage side, and user side voltage data at all times in the unit; Define related thresholds to screen voltage abnormal distribution transformers and users in the target unit; output bus transformation scheme, select abnormal distribution transformers according to abnormal distribution transformer screening standards, set transformation criteria to carry out bus transformation; bus transformation scheme effectiveness simulation; bus transformation scheme adjustment, based on the simulation results of the bus transformation scheme, adjust the bus transformation scheme until the requirements are met, and then guide the bus transformation; output distribution transformer transformation scheme, select abnormal areas after bus transformation according to abnormal area screening standards, set transformation criteria to carry out distribution transformer transformation; distribution transformer transformation scheme effectiveness simulation; distribution transformer transformation scheme adjustment, based on the simulation results of the distribution transformer transformation scheme, adjust the distribution transformer transformation scheme until the requirements are met, and then guide the distribution transformer transformation; local voltage weak point positioning, according to the final version of the bus-distribution transformer step-by-step transformation scheme and its simulation results, combined with the abnormal distribution transformers and area screening standards, select abnormal distribution transformers and areas, and locate the local voltage weak points; output local voltage weak point treatment scheme, combined with historical voltage treatment typical cases, according to the problem type, investment, and treatment effectiveness, input the optimal voltage treatment scheme; guide the unit to carry out voltage treatment, based on the bus-voltage step-by-step transformation scheme and the local voltage weak point treatment scheme, guide the target unit to carry out voltage treatment, and realize comprehensive improvement of voltage quality.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to realize the steps of the power distribution network voltage qualification rate multi-channel comprehensive improvement method according to any one of claims 1-7.

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