Power distribution network project optimization method and computer equipment

Abstract

The invention relates to a power distribution network project optimization method and computer equipment. The method comprises the steps of obtaining a plurality of to-be-optimized projects of the power distribution network and a plurality of evaluation indexes corresponding to the to-be-optimized projects; based on a scoring standard corresponding to each evaluation index, determining a scoring result of each evaluation index corresponding to each to-be-optimized project; performing weighted calculation based on the scoring result of each evaluation index corresponding to each to-be-optimized project to obtain a total scoring result of each to-be-optimized project; determining the optimization priority of each to-be-optimized project based on the total score result of each to-be-optimized project; and performing power distribution network project optimization based on the optimization priority of each to-be-optimized project. By adopting the method, more scientific, objective and efficient comprehensive evaluation and optimal selection of the power distribution network project can be realized.

Description

Technical Field

[0001] The present application relates to the technical field of distribution network optimization, and in particular to a distribution network project optimization method and computer equipment. Background Art

[0002] The optimal selection of distribution network projects requires a comprehensive evaluation of multiple dimensions. Commonly used methods include analytic hierarchy process (AHP), fuzzy comprehensive evaluation (FCE), grey system theory, fuzzy analytic hierarchy process (Fuzzy AHP) and data envelopment analysis (DEA).

[0003] Although the above methods have their own advantages, they also have problems such as strong subjectivity, high computational complexity, and incomplete indicator system. In addition, defects such as complex data processing, lack of dynamics and adaptability, and lack of scientificity in the weight allocation of multi-dimensional indicators also limit their application effects.

[0004] Therefore, it is urgent to improve the existing methods to achieve more scientific, objective and efficient comprehensive evaluation and optimal selection of distribution network projects. Summary of the invention

[0005] Based on this, it is necessary to provide a distribution network project optimization method and computer equipment to address the above technical issues.

[0006] In a first aspect, the present application provides a distribution network project optimization method, the method comprising:

[0007] Obtain multiple items to be optimized in the distribution network and multiple evaluation indicators corresponding to each item to be optimized;

[0008] Based on the scoring criteria corresponding to each evaluation indicator, determine the scoring results of each evaluation indicator corresponding to each project to be optimized;

[0009] Perform weighted calculation based on the scoring results of each evaluation indicator corresponding to each project to be optimized to obtain the total scoring results of each project to be optimized;

[0010] Based on the total score results of each project to be optimized, determine the optimization priority of each project to be optimized;

[0011] Distribution network projects are optimized based on the optimization priority of each project to be optimized.

[0012] In one embodiment, the projects to be optimized include medium voltage line overload, medium voltage line heavy load, medium voltage line end voltage not meeting the standard, new substation outgoing lines to meet the power supply of new loads, distribution transformer overload, distribution transformer heavy load, newly built substations to meet load demand, substations undervoltage, safety hazards in medium and low voltage lines, medium voltage grid completeness, replacement of obsolete equipment or lines, and reduction of line losses.

[0013] In one embodiment, the evaluation indicators of medium voltage line overload and medium voltage line heavy load both include:

[0014] Ensure power supply level, load level, line installed capacity of distribution transformer (including special transformer) before transformation, investment of 10,000 yuan to improve load rate, customer complaints;

[0015] Among them, the evaluation indicators of medium-voltage line overload also include: overload period, maximum load rate of the current overloaded line, time for the previous overloaded line to improve the grid, and load rate of the overloaded line after investment; the evaluation indicators of medium-voltage line overload also include: overload period, maximum load rate of the current overloaded line, time for the previous overloaded line to improve the grid, and load rate of the overloaded line after investment.

[0016] In one embodiment, the evaluation index of the medium voltage line terminal voltage not meeting the standard includes:

[0017] Power supply level, load level, current medium voltage line power supply radius, medium voltage line power supply radius after investment, current trunk line diameter, the last time the grid was improved for this line, the voltage increase range per 10,000 yuan investment, and customer complaints.

[0018] In one embodiment, the evaluation index of whether the new outgoing line of the substation meets the power supply requirements of the newly added load includes:

[0019] Ensure power supply level, load grade, maximum load rate of new lines in the first year, investment of 10,000 yuan to meet new power supply load, and customer complaints.

[0020] In one embodiment, the evaluation indicators of distribution transformer overload and distribution transformer heavy load both include:

[0021] Power supply level, load level, actual number of users of distribution transformer, time of last transformation of distribution transformer area, load rate improved by investment of 10,000 yuan, customer complaints and whether it is a new point;

[0022] Among them, the evaluation indicators of distribution transformer overload also include: overload period, maximum load rate of current overloaded distribution transformer, and load rate of overloaded distribution transformer after investment; among them, the evaluation indicators of distribution transformer overload also include: overload period, maximum load rate of current overloaded distribution transformer, and load rate of overloaded distribution transformer after investment.

[0023] In one embodiment, the evaluation indexes of the newly built substation meeting the load demand and the substation undervoltage include:

[0024] Ensure power supply level, load level, and customer complaints;

[0025] Among them, the evaluation indicators for newly built substations to meet load demands also include: the maximum load rate of the new line in the first year, and the load demand can be met with an investment of 10,000 yuan; the evaluation indicators for substation undervoltage also include: the power supply radius of the current substation low-voltage line, the power supply radius of the substation low-voltage line after investment, the actual number of users affected by the annual substation undervoltage, the time of the previous distribution transformer substation renovation, and the voltage increase amplitude with an investment of 10,000 yuan.

[0026] In one of the embodiments, the evaluation indicators of the safety hazards existing in the medium and low voltage lines include: power supply level, load level, personal safety hazards, and operation hazards.

[0027] In one embodiment, the evaluation index of the integrity of the medium voltage grid includes:

[0028] Power supply level, load level, number of contact points after transformation, contact situation, number of trunk line sections, and trunk line diameter;

[0029] Evaluation indicators for replacement of obsolete equipment or lines include:

[0030] Power supply level, load level, types of defects that have occurred in the past, years of operation, whether it is required to be eliminated by order, and the current status of the equipment;

[0031] Evaluation indicators for line loss reduction include:

[0032] Load level, line loss rate before transformation, average monthly power supply in the year before transformation, line power supply radius, and annual electricity savings per 10,000 yuan investment.

[0033] In a second aspect, the present application provides a computer device including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method in the above embodiment when executing the computer program.

[0034] The above distribution network project optimization method and computer equipment have at least the following beneficial effects:

[0035] By constructing a scientific, reasonable and effective distribution network project optimization index system, high quality and high precision of project evaluation are achieved. The system follows the principles of accuracy, standardization, comparability, reliability, objectivity and comprehensiveness, ensuring that the evaluation indicators are clearly defined, uniformly classified, easy to compare, reliable in data, and truly reflect the actual status. It also comprehensively covers all aspects of distribution network operation, thereby greatly improving the scientificity and effectiveness of distribution network project optimization and investment management. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] FIG1 is a schematic diagram of a flow chart of a method for optimizing a distribution network project in one embodiment;

[0038] FIG2 is a structural block diagram of a distribution network project optimization device in one embodiment;

[0039] FIG. 3 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0041] In an exemplary embodiment, as shown in FIG1 , a method for optimizing a distribution network project is provided, comprising the following steps S102 to S110. In which:

[0042] S102, obtaining a plurality of items to be optimized of the distribution network and a plurality of evaluation indicators corresponding to each item to be optimized;

[0043] S104, determining the scoring results of the evaluation indicators corresponding to the projects to be optimized based on the scoring standards corresponding to the evaluation indicators;

[0044] S106, performing weighted calculation based on the scoring results of the evaluation indicators corresponding to the projects to be optimized, to obtain the total scoring results of the projects to be optimized;

[0045] S108, determining the optimization priority of each project to be optimized based on the total score results of each project to be optimized;

[0046] S110, optimizing the distribution network project based on the optimization priority of each project to be optimized.

[0047] Exemplarily, multiple projects that need to be optimized are identified, such as "medium voltage transmission line overload project", "distribution transformer overload project", "distribution area voltage low project", etc., and a series of relevant evaluation indicators are determined for each project, such as load rate, voltage qualification rate, equipment health index, etc. According to the pre-set scoring criteria, each evaluation indicator in each project to be optimized is scored. For example, for the "medium voltage transmission line overload project", if the load rate exceeds 80%, the score is 2 points; between 70% and 80%, the score is 3 points; below 70%, the score is 4 points. Then, according to the importance of each evaluation indicator, the corresponding weight is assigned, and all the scoring results are weighted to obtain the total score result of each project to be optimized. Assuming that the weight of "load rate" is 0.6, the weight of "voltage qualification rate" is 0.3, and the weight of "equipment health index" is 0.1, the total score of each project can be calculated. Among them, the weight of each evaluation indicator can be determined by constructing the relative importance of each indicator in the form of expert scoring, so as to determine the weight of each distribution network project evaluation indicator. By sorting the data of the expert opinion survey form, a judgment matrix for comparing all evaluation indicators is formed. Based on the results of the consistency test, the indicator weight values ​​are obtained from the valid sample results of the expert opinion survey. Finally, the weight of each evaluation indicator is obtained by the mean method. Subsequently, the optimization priority of each project to be optimized is determined according to the total score result. For example, the project with the highest total score will be listed as the priority object for optimization. Finally, according to the determined optimization priority, the above-mentioned projects to be optimized are gradually optimized from the time dimension and capital investment dimension, so as to gradually improve the overall performance of the distribution network.

[0048] The above-mentioned distribution network project optimization method achieves high quality and high precision in project evaluation by constructing a scientific, reasonable and effective distribution network project optimization index system. The system follows the principles of accuracy, standardization, comparability, reliability, objectivity and comprehensiveness, ensuring that the evaluation indicators are clearly defined, uniformly classified, easy to compare, reliable in data, and truly reflect the actual status, and comprehensively cover all aspects of distribution network operation, thereby greatly improving the scientificity and effectiveness of distribution network project optimization and investment management.

[0049] In an exemplary embodiment, the projects to be optimized include medium voltage line overload, medium voltage line heavy load, medium voltage line end voltage not meeting standards, new substation lines to meet the power supply of new loads, distribution transformer overload, distribution transformer heavy load, newly built substations to meet load demand, substation undervoltage, safety hazards in medium and low voltage lines, medium voltage grid completeness, replacement of obsolete equipment or lines, and reduction of line losses.

[0050] Among them, the solution to medium-voltage line overload mainly refers to reducing the load rate of medium-voltage lines by increasing substation outlets and renovating existing overloaded medium-voltage lines. The solution to medium-voltage line overload mainly refers to reducing the load rate of medium-voltage lines by increasing substation outlets and renovating existing overloaded medium-voltage lines. The solution to medium-voltage line terminal voltage failure mainly refers to improving the terminal voltage qualification rate of medium-voltage lines by installing reactive power compensation devices and renovating existing terminal voltage failure medium-voltage lines. The new outlet of the substation to meet the power supply of the newly added load mainly refers to adding new outlets to the existing substations to meet the load growth needs caused by the recent new power projects. The solution to distribution transformer overload mainly refers to reducing the load rate of distribution transformers by adding new points and renovating existing overloaded distribution transformers. The solution to distribution transformer overload mainly refers to reducing the load rate of distribution transformers by adding new points and renovating existing overloaded distribution transformers. The new substation area to meet the load demand mainly refers to the new substation area points to meet the load growth needs caused by the recent new substation users. Solving the problem of undervoltage in the substation mainly refers to improving the voltage qualification rate in the substation by installing reactive power compensation devices, renovating the existing medium-voltage lines with unqualified terminal voltage, extending the medium-voltage lines, and adding distribution transformers. Solving the potential safety hazards in medium and low voltage lines mainly refers to eliminating the personal safety and operation hazards in medium and low voltage lines through technical transformation. Improving the medium-voltage grid mainly refers to achieving reasonable segmentation of the medium-voltage trunk line, increasing the number of contact points, and meeting the requirements of the conductor cross-section through measures such as adding medium-voltage lines and renovating existing medium-voltage lines, so that the medium-voltage grid structure tends to be reasonable. Replacing obsolete equipment or lines mainly refers to replacing obsolete equipment or lines that have been in operation for a long time, have a high frequency of failures, have many defects, and are required to be eliminated by explicit orders. Reducing line losses mainly refers to reducing distribution network line losses by installing reactive power compensation devices, building new stations or renovating old stations to shorten the power supply radius, and renovating existing lines.

[0051] In this embodiment, a variety of problems existing in the distribution network are identified and solved through a systematic method, such as medium voltage line overload, heavy load, terminal voltage not meeting the standard, distribution transformer overload and heavy load, undervoltage in the substation area, safety hazards, unreasonable grid structure and replacement of old equipment, etc., which not only effectively improves the operating efficiency and power supply quality of the distribution network, but also enhances the safety and reliability of the power grid. Through targeted optimization measures, such as increasing substation outgoing lines, installing reactive power compensation devices, technical transformation and equipment updates, etc., accurate management of weak links in the power grid is achieved, thereby reducing line losses, meeting the needs of new loads, and laying a solid foundation for the long-term development of the power grid.

[0052] In an exemplary embodiment, the evaluation indicators of medium voltage line overload and medium voltage line heavy load both include:

[0053] Ensure power supply level, load level, line installed capacity of distribution transformer (including special transformer) before transformation, investment of 10,000 yuan to improve load rate, customer complaints;

[0054] Among them, the evaluation indicators of medium-voltage line overload also include: overload period, maximum load rate of the current overloaded line, time for the previous overloaded line to improve the grid, and load rate of the overloaded line after investment; the evaluation indicators of medium-voltage line overload also include: overload period, maximum load rate of the current overloaded line, time for the previous overloaded line to improve the grid, and load rate of the overloaded line after investment.

[0055] For example, the necessity of project establishment and implementation effect of distribution network projects to solve medium-voltage line overload are generally measured mainly through: power supply guarantee level, load level, line installed distribution transformer capacity (including special transformer) before transformation, overload period, maximum load rate of the current overloaded line, time for the previous overloaded line to improve the grid, load rate of the overloaded line after investment, load rate improved by 10,000 yuan investment, customer complaints, and average annual growth rate of overloaded line load in the next five years. Since the average annual growth rate of overloaded line load in the next five years is difficult to predict and the authenticity of the data is difficult to grasp, the optimization evaluation index system for distribution network projects to solve medium-voltage line overload adopts 9 indicators: power supply guarantee level, load level, line installed distribution transformer capacity (including special transformer) before transformation, overload period, maximum load rate of the current overloaded line, time for the previous overloaded line to improve the grid, load rate of the overloaded line after investment, load rate improved by 10,000 yuan investment, and customer complaints. The value assignment and judgment criteria of each indicator are shown in Table 1 below.

[0056] Table 1

[0057]

[0058] Among them, the power supply guarantee level is used to reflect the importance of the power load. According to the requirements of power supply reliability and the degree of harm caused by power interruption, important power users are divided into special, first-level and second-level important power users. The load level is used to reflect the medium- and long-term power load density planned for the power supply area of ​​the distribution network. The installed distribution transformer capacity (including special transformer) of the line before the transformation is used to reflect the power supply range of the medium-voltage line. The calculation formula is as follows: the installed distribution transformer capacity of the medium-voltage line (kVA) = the sum of the capacity of the medium-voltage public transformer (kVA) + the sum of the capacity of the medium-voltage special transformer (kVA). The overload period is used to reflect the duration of the overload under the normal operation of the medium-voltage line (no power supply). The maximum load rate of the current overloaded line is used to reflect the severity of the current medium-voltage line overload. The calculation formula is as follows: the maximum load rate of the line = the maximum load of the line on the maximum load day of the entire district and county / the maximum transmission capacity of the line. The time when the previous overloaded line was improved is used to reflect whether there is repeated investment in improving the overload problem of the medium-voltage line and the time interval between repeated investments. The load rate of overloaded lines after investment is used to reflect the annual maximum load rate of overloaded lines after investment. The calculation formula is as follows: Maximum load rate of line = Maximum load of line on the maximum load day of the entire district / county / maximum transmission capacity of line. The load rate improved by 10,000 yuan investment is used to reflect the economic benefits of distribution network investment, which refers to the degree of improvement in the load rate of medium-voltage lines corresponding to 10,000 yuan of distribution network investment. The calculation formula is as follows: Load rate improved by 10,000 yuan investment (% / 10,000 yuan) = (maximum load rate of current overloaded lines (%) - load rate of overloaded lines after investment (%)) / total project investment (10,000 yuan). Customer complaints are used to reflect the degree of customer concern about power quality issues caused by medium-voltage line overload.

[0059] The necessity of project establishment and implementation effect of medium-voltage line heavy-load distribution network projects are generally measured mainly through: power supply guarantee level, load level, line installed distribution transformer capacity (including special transformer) before transformation, heavy-load period, current maximum load rate of heavy-load line, time for the previous heavy-load line to improve the grid, load rate of heavy-load line after investment, load rate improved by 10,000 yuan investment, customer complaints, and average annual growth rate of heavy-load line load in the next five years. Since the average annual growth rate of heavy-load line load in the next five years is difficult to predict and the authenticity of the data is difficult to grasp, the optimal evaluation index system for medium-voltage line heavy-load distribution network projects adopts 9 indicators: power supply guarantee level, load level, line installed distribution transformer capacity (including special transformer) before transformation, heavy-load period, current maximum load rate of heavy-load line, time for the previous heavy-load line to improve the grid, load rate of heavy-load line after investment, load rate improved by 10,000 yuan investment, and customer complaints. The value assignment and judgment criteria of each indicator are shown in Table 2 below.

[0060] Table 2

[0061]

[0062] Among them, the specific meanings of the power supply guarantee level, load level, and line installed distribution transformer capacity (including special transformer) before transformation can be referred to the above description, and will not be repeated here. The overload period is used to reflect the duration of overload under normal operation of the medium-voltage line (no power supply). The maximum load rate of the current overloaded line is used to reflect the severity of the current overload of the medium-voltage line. The calculation formula is as follows: Maximum load rate of the line = maximum load of the line on the maximum load day of the entire district and county / maximum transmission capacity of the line. The time when the last overloaded line was improved is used to reflect whether there is a problem of repeated investment to improve the overload of the medium-voltage line and the time interval between repeated investments. The load rate of the overloaded line after investment is used to reflect the annual maximum load rate of the overloaded line after investment. The calculation formula is as follows: Maximum load rate of the line = maximum load of the line on the maximum load day of the entire district and county / maximum transmission capacity of the line. The load rate improved by 10,000 yuan investment is used to reflect the economic benefits of distribution network investment. It refers to the degree of improvement in the load rate of medium-voltage lines corresponding to a distribution network investment of 10,000 yuan. The calculation formula is as follows: Load rate improvement with an investment of 10,000 yuan (% / 10,000 yuan) = (maximum load rate of the current heavy-loaded line (%) - load rate of the heavy-loaded line after investment (%)) / total project investment (10,000 yuan).

[0063] In this embodiment, a detailed evaluation index system is used to effectively quantify the severity of medium voltage line overload and heavy load problems and the urgency and economic benefits of solving them. This not only helps to accurately identify the problems that need to be solved as a priority, but also can evaluate the improvement effect after investment, thereby improving the safety and reliability of power grid operation.

[0064] In an exemplary embodiment, the evaluation index of the medium voltage line terminal voltage not meeting the standard includes:

[0065] Power supply level, load level, current medium voltage line power supply radius, medium voltage line power supply radius after investment, current trunk line diameter, the last time the grid was improved for this line, the voltage increase range per 10,000 yuan investment, and customer complaints.

[0066] Exemplarily, the necessity of project establishment and implementation effect of distribution network projects for solving the problem of unqualified voltage at the end of medium-voltage lines are generally measured mainly through indicators such as power supply guarantee level, load level, current power supply radius of medium-voltage lines, power supply radius of medium-voltage lines after investment, current main line diameter, time of last grid improvement of this line, voltage increase amplitude with 10,000 yuan investment, customer complaints, current terminal voltage of medium-voltage lines, terminal voltage of medium-voltage lines after investment, and power supply scope for solving unqualified voltage. Since the terminal voltage value is directly related to the measurement position, it is difficult to unify the standard in actual operation, and the actual statistics of the power supply scope with unqualified voltage will also be quite difficult. Therefore, the optimization evaluation index system for distribution network investment projects for solving the problem of unqualified voltage at the end of medium-voltage lines adopts 8 indicators: power supply guarantee level, load level, current power supply radius of medium-voltage lines, power supply radius of medium-voltage lines after investment, current main line diameter, time of last grid improvement of this line, voltage increase amplitude with 10,000 yuan investment, and customer complaints. The value assignment and judgment criteria of each indicator are shown in Table 3 below.

[0067] Table 3

[0068]

[0069] Among them, the meanings of the power supply guarantee level and load level can refer to the description in the above embodiment, and will not be repeated here. The current medium-voltage line power supply radius is used to reflect the degree of protection of the current medium-voltage line power supply radius for the voltage quality at the end of the line. The medium-voltage line power supply radius after investment is used to reflect the degree of protection of the medium-voltage line power supply radius for the voltage quality at the end of the line after investment. The current trunk line path is used to reflect the degree of protection of the current medium-voltage line path for the voltage quality at the end of the line. The time when the grid of this line was improved last time is used to reflect whether there is repeated investment in improving the unqualified voltage at the end of the line and the time interval between repeated investments. The voltage increase amplitude of 10,000 yuan investment is used to reflect the economic benefits of distribution network investment, which refers to the degree of improvement of the voltage at the end of the medium-voltage line corresponding to the investment of 10,000 yuan in the distribution network. The calculation formula is as follows: the voltage increase amplitude of 10,000 yuan investment (v / 10,000 yuan) = (the voltage at the end of the medium-voltage line after investment (v) - the current voltage at the end of the medium-voltage line (v)) / the total investment of the project (10,000 yuan). Customer complaints are used to reflect the degree of concern of customers about the power quality problems caused by the unqualified voltage at the end of the medium-voltage line.

[0070] In this embodiment, a set of systematic evaluation index systems are used to effectively evaluate the necessity and investment effect of solving the problem of unqualified voltage at the end of the medium-voltage line. This can not only accurately identify the problem areas that need to be addressed as a priority, but also ensure the rationality and effectiveness of the investment, thereby improving the service quality of the power grid and user satisfaction, while enhancing the stability and reliability of the power grid operation.

[0071] In an exemplary embodiment, the evaluation indexes for whether the new outgoing line of the substation meets the power supply needs of the newly added loads include:

[0072] Ensure power supply level, load grade, maximum load rate of new lines in the first year, investment of 10,000 yuan to meet new power supply load, and customer complaints.

[0073] Exemplarily, the optimal evaluation index system for measuring whether the new outgoing line of a substation can meet the power supply needs of the newly added load distribution network project generally includes: power supply guarantee level, load level, maximum load rate of the new outgoing line in the first year (calculated based on the reported and transferred capacity), investment of 10,000 yuan to meet the newly added power supply load, customer complaints, and power supply scope. Since the power supply scope is affected by the load density and cannot represent the real newly added load, the optimal evaluation index system for the investment project of the distribution network that the new outgoing line of a substation can meet the power supply needs of the newly added load distribution network adopts: power supply guarantee level, load level, maximum load rate of the new outgoing line in the first year (calculated based on the reported and transferred capacity), investment of 10,000 yuan to meet the newly added power supply load, and customer complaints. The value assignment and judgment criteria of each indicator are shown in Table 4.

[0074] Table 4

[0075]

[0076] Among them, the meanings of the power supply level and load level can refer to the description in the above embodiments and will not be repeated here. The maximum load rate of the new outgoing line in the first year is used to reflect the asset utilization efficiency in the first year after the new outgoing line of the substation is completed and put into operation. The investment of 10,000 yuan to meet the newly added power supply load is used to reflect the economic benefits of the distribution network investment. It refers to the newly added power supply load corresponding to the investment of 10,000 yuan in the distribution network. The calculation formula is as follows: 10,000 yuan investment to meet the newly added power supply load (kW / 10,000 yuan) = (power supply load after investment (kW / 10,000 yuan) - current power supply load (kW / 10,000 yuan)) / total project investment (10,000 yuan). Customer complaints are used to reflect the degree of customer concern about service quality issues caused by the failure to meet the newly added power supply load.

[0077] In this embodiment, through the above-mentioned price index system, the selectivity and implementation effect of the new outgoing line of the substation to meet the new load power supply project are effectively evaluated, which can not only accurately identify and give priority to areas with faster load growth, but also ensure the rationality and efficiency of investment, thereby improving the service capacity of the power grid and user satisfaction, while enhancing the flexibility and reliability of the power grid in responding to load growth.

[0078] In an exemplary embodiment, the evaluation indicators of distribution transformer overload and distribution transformer heavy load both include:

[0079] Power supply level, load level, actual number of users of distribution transformer, time of last transformation of distribution transformer area, load rate improved by investment of 10,000 yuan, customer complaints and whether it is a new point;

[0080] Among them, the evaluation indicators of distribution transformer overload also include: overload period, maximum load rate of current overloaded distribution transformer, and load rate of overloaded distribution transformer after investment; among them, the evaluation indicators of distribution transformer overload also include: overload period, maximum load rate of current overloaded distribution transformer, and load rate of overloaded distribution transformer after investment.

[0081] Exemplarily, the optimal evaluation index system for solving the problem of distribution transformer overload projects includes the following main indicators: power supply guarantee level, actual number of distribution transformer users, load level, overload period, maximum load rate of current overloaded distribution transformer, load rate of overloaded distribution transformer after investment, time of last distribution transformer area renovation, load rate improved by 10,000 yuan investment, customer complaints, whether it is a newly added point, and the average annual growth rate of overloaded distribution transformer load in the next five years. Since the average annual growth rate of overloaded distribution transformer load in the next five years is difficult to predict and the authenticity of the data is difficult to grasp, the optimal evaluation index system for solving the problem of distribution transformer overload distribution network projects adopts 10 indicators: power supply guarantee level, load level, actual number of distribution transformer users, overload period, maximum load rate of current overloaded distribution transformer, load rate of overloaded distribution transformer after investment, time of last distribution transformer area renovation, load rate improved by 10,000 yuan investment, customer complaints, and whether it is a newly added point. The value assignment and judgment criteria of each indicator are shown in Table 5 below.

[0082] Table 5

[0083]

[0084] Among them, the meanings of the power supply guarantee level and load level can be referred to the description in the above embodiments, and will not be repeated here. The actual number of distribution transformer users is used to reflect the size of the power supply range of the distribution transformer. The overload period is used to reflect the duration of the overload under the normal operating state of the distribution transformer. The maximum load rate of the current overloaded distribution transformer is used to reflect the severity of the current distribution transformer overload, and the calculation formula is as follows: distribution transformer load rate = maximum line load on the maximum load day of the entire district and county / line installed distribution transformer capacity. The load rate of the overloaded distribution transformer after investment is used to reflect the annual maximum load rate of the overloaded distribution transformer after investment. The calculation formula is as follows: distribution transformer load rate = maximum line load on the maximum load day of the entire district and county / line installed distribution transformer capacity. The time when the previous distribution transformer substation was transformed is used to reflect whether the distribution transformer substation has repeatedly invested in improving the distribution transformer overload problem and the time interval between repeated investments. The load rate improved by an investment of 10,000 yuan is used to reflect the economic benefits of the distribution network investment. Refers to the degree of improvement in the load factor of distribution transformers corresponding to a distribution network investment of 10,000 yuan. The calculation formula is as follows: Load factor improvement for 10,000 yuan investment (% / 10,000 yuan) = (maximum load factor of current overloaded distribution transformer (%) - load factor of overloaded distribution transformer after investment (%)) / total project investment (10,000 yuan). Customer complaints are used to reflect the degree of concern of customers about power quality problems caused by distribution transformer overload.

[0085] The evaluation index system for measuring the optimal distribution network project to solve the problem of distribution transformer overload generally includes: power supply level, load level, actual number of distribution transformer users, overload period, current maximum load rate of overload distribution transformer, load rate of overload distribution transformer after investment, time of the previous distribution transformer area renovation, load rate improved by 10,000 yuan investment, customer complaints, whether it belongs to new distribution points, and the average annual growth rate of overload distribution transformer load in the next five years. Since the average annual growth rate of overload distribution transformer load in the next five years is difficult to predict and the authenticity of the data, the evaluation index system for measuring the optimal distribution network project to solve the problem of distribution transformer overload adopts 10 indicators: power supply level, load level, actual number of distribution transformer users, overload period, current maximum load rate of overload distribution transformer, load rate of overload distribution transformer after investment, time of the previous distribution transformer area renovation, load rate improved by 10,000 yuan investment, customer complaints, and whether it belongs to new distribution points. The value assignment and judgment criteria of each indicator are shown in Table 6 below.

[0086] Table 6

[0087]

[0088] Among them, the meanings of the power supply guarantee level, load level, and the actual number of users of the distribution transformer can refer to the description in the above embodiments, and will not be repeated here. The overload period is used to reflect the duration of the overload under the normal operating state of the distribution transformer. The maximum load rate of the current overloaded distribution transformer is used to reflect the severity of the current distribution transformer overload. The calculation formula is as follows: Distribution transformer load rate = maximum load of the line on the maximum load day of the entire district and county / distribution transformer capacity installed on the line. The load rate of the overloaded distribution transformer after investment is used to reflect the annual maximum load rate of the overloaded distribution transformer after investment. The calculation formula is as follows: Distribution transformer load rate = maximum load of the line on the maximum load day of the entire district and county / distribution transformer capacity installed on the line. The time when the previous distribution transformer substation was transformed is used to reflect whether the distribution transformer substation has repeatedly invested in improving the distribution transformer overload problem and the time interval between repeated investments. The load rate improvement per 10,000 yuan investment is used to reflect the economic benefits of distribution network investment. It refers to the degree of improvement in the load rate of distribution transformers corresponding to 10,000 yuan of distribution network investment. The calculation formula is as follows: Load rate improvement per 10,000 yuan investment (% / 10,000 yuan) = (maximum load rate of current overloaded distribution transformer (%) - load rate of overloaded distribution transformer after investment (%)) / total project investment (10,000 yuan). Customer complaints are used to reflect the degree of customer concern about power quality problems caused by heavy load of distribution transformers. Whether it is a new point of deployment is used to reflect whether solving the problem of heavy load of distribution transformers is an encouraged way of adding points of deployment.

[0089] In this embodiment, the necessity and investment effect of solving the overload and heavy load problems of distribution transformers are effectively evaluated through the above evaluation index system. The system includes multiple indicators such as power supply guarantee level, load level, actual number of users of distribution transformers, overload / heavy load period, current maximum load rate, load rate after investment, last transformation time, load rate improved by 10,000 yuan investment, customer complaints and whether it belongs to new deployment, etc. It can comprehensively measure the economic and social benefits of the project, not only accurately identify the problem areas that need to be dealt with first, but also ensure the rationality and effectiveness of investment, thereby improving the service quality of the power grid and user satisfaction, while enhancing the stability and reliability of power grid operation.

[0090] In an exemplary embodiment, the evaluation indicators of the newly built substation meeting the load demand and the substation undervoltage include:

[0091] Ensure power supply level, load level, and customer complaints;

[0092] Among them, the evaluation indicators for newly built substations to meet load demands also include: the maximum load rate of the new line in the first year, and the load demand can be met with an investment of 10,000 yuan; the evaluation indicators for substation undervoltage also include: the power supply radius of the current substation low-voltage line, the power supply radius of the substation low-voltage line after investment, the actual number of users affected by the annual substation undervoltage, the time of the previous distribution transformer substation renovation, and the voltage increase amplitude with an investment of 10,000 yuan.

[0093] Exemplarily, the optimal evaluation index system for measuring whether a new distribution network project meets the load demand of a new substation generally includes the following indicators: power supply guarantee level, load level, maximum load rate of a new line in the first year, 10,000 yuan investment to meet the load demand, customer complaints, and power supply range. Since the power supply range is affected by the load density and cannot represent the real new load, the optimal evaluation index system for measuring whether a new distribution network project meets the load demand of a new substation adopts five indicators: power supply guarantee level, load level, maximum load rate of a new line in the first year, 10,000 yuan investment to meet the load demand, and customer complaints. The value assignment and judgment criteria of each indicator are shown in Table 7.

[0094] Table 7

[0095]

[0096] Among them, the meanings of the power supply level and load level can refer to the description in the above embodiments and will not be repeated here. The maximum load rate of the new outgoing line in the first year is used to reflect the asset utilization efficiency in the first year after the substation is completed and put into operation, and is mainly calculated based on the reported and transferred capacity. An investment of 10,000 yuan to meet the load demand is used to reflect the economic benefits of the investment in a new substation. It refers to the newly added power supply load corresponding to an investment of 10,000 yuan in the substation. The calculation formula is as follows: An investment of 10,000 yuan to meet the load demand (kW / 10,000 yuan) = (power supply load after investment (kW / 10,000 yuan) - current power supply load (kW / 10,000 yuan)) / total project investment (10,000 yuan). Customer complaints are used to reflect the degree of customer concern about service quality issues caused by the failure to meet the newly added power supply load.

[0097] The evaluation index system for the optimization of distribution network projects that solve the problem of undervoltage in the substation generally includes: power supply guarantee level, load level, power supply radius of the current low-voltage line in the substation, power supply radius of the low-voltage line in the substation after investment, actual number of users affected by the annual undervoltage in the substation, time of the previous distribution transformer substation transformation, voltage increase amplitude after 10,000 yuan investment, customer complaints, current substation voltage, substation voltage after investment, and power supply scope for solving unqualified voltage. Since the substation voltage value is directly related to the measurement location, it is difficult to unify the standard in actual operation, and the actual statistics of the power supply scope with unqualified voltage will also be quite difficult. Therefore, the evaluation index system for the optimization of distribution network projects that solve the problem of undervoltage in the substation adopts: power supply guarantee level, load level, power supply radius of the current low-voltage line in the substation, power supply radius of the low-voltage line in the substation after investment, actual number of users affected by the annual undervoltage in the substation, time of the previous distribution transformer substation transformation, voltage increase amplitude after 10,000 yuan investment, and customer complaints. The value assignment and judgment criteria of each indicator are shown in Table 8.

[0098] Table 8

[0099]

[0100] Among them, the meaning of the power supply guarantee level and load level can refer to the description in the above embodiment, and will not be repeated here. The current low-voltage line power supply radius of the front area is used to reflect the degree of protection of the voltage quality of the area by the low-voltage line power supply radius of the current area. The low-voltage line power supply radius of the rear area after investment is used to reflect the degree of protection of the voltage quality of the area by the low-voltage line power supply radius of the rear area after investment. The actual number of users affected by the annual undervoltage in the area is used to reflect the size of the voltage impact range of the area. The time when the last distribution transformer area was renovated is used to reflect whether there is repeated investment in improving the low voltage problem in the distribution transformer area and the time interval of repeated investment. The voltage increase amplitude of 10,000 yuan investment is used to reflect the economic benefits of the investment in the distribution transformer area. It refers to the improvement degree of the area voltage corresponding to the investment of 10,000 yuan in the distribution transformer area. The calculation formula is as follows: the voltage increase amplitude of 10,000 yuan investment (v / 10,000 yuan) = (the area voltage after investment (v) - the current area voltage (v)) / the total investment of the project (10,000 yuan). Customer complaints are used to reflect the degree of customer concern about the power quality problems caused by undervoltage in the area.

[0101] In this embodiment, the above-mentioned evaluation index system is used to effectively evaluate the necessity and investment effect of building new substations to meet load demand and solve substation undervoltage problems. It can not only identify and prioritize load growth and voltage quality issues, but also ensure the rationality and efficiency of investment, thereby improving the service capacity of the power grid and user satisfaction, while enhancing the stability and reliability of power grid operation.

[0102] In an exemplary embodiment, the evaluation indicators of the potential safety hazards existing in medium and low voltage lines include: power supply level, load level, personal safety hazards, and operation hazards.

[0103] Exemplarily, the evaluation index system for optimizing distribution network projects that address potential safety hazards in medium and low voltage lines generally includes the following indicators: power supply level, load level, personal safety hazard, operational hazard, cable preventive test failure, and the repair technology and economy are not reasonable after evaluation; serious damage, abnormal heating, aging, corrosion, deformation, and the repair technology and economy are not reasonable after evaluation. However, since some indicators are difficult to count and judge in actual operation, the evaluation index system for optimizing distribution network investment projects that address potential safety hazards in medium and low voltage lines adopts four indicators: power supply level, load level, personal safety hazard, and operational hazard. The value assignment and judgment criteria of each indicator are shown in Table 9.

[0104] Table 9

[0105]

[0106] The meanings of the power supply level and load level can be referred to the description in the above embodiments, which will not be repeated here. The personal safety hazard is used to reflect the severity of the personal safety hazard in the current distribution network. The operation hazard is used to reflect the severity of the hazard in the operation of the current distribution network.

[0107] In this embodiment, the above-mentioned evaluation index system is used to effectively evaluate the necessity and urgency of solving the potential safety hazards in medium and low voltage lines. It is possible to accurately identify and prioritize areas with potential safety hazards, and ensure the pertinence and effectiveness of rectification measures, thereby improving the safety and reliability of the power grid and protecting the lives and property of the public.

[0108] In an exemplary embodiment, the evaluation indexes of the integrity of the medium voltage grid include:

[0109] Power supply level, load level, number of contact points after transformation, contact situation, number of trunk line sections, and trunk line diameter;

[0110] Evaluation indicators for replacement of obsolete equipment or lines include:

[0111] Power supply level, load level, types of defects that have occurred in the past, years of operation, whether it is required to be eliminated by order, and the current status of the equipment;

[0112] Evaluation indicators for line loss reduction include:

[0113] Load level, line loss rate before transformation, average monthly power supply in the year before transformation, line power supply radius, and annual electricity savings per 10,000 yuan investment.

[0114] Exemplarily, the evaluation index system for measuring and improving the optimization of medium-voltage grid-type distribution network projects generally includes: power supply level, load level, number of contact points after transformation, contact conditions, number of main line sections, main line diameter, improving the typical connection ratio of distribution network, improving the ratio of transferable power supply lines in distribution network, improving the insulation level of distribution network, etc. However, since it is difficult to give optimization standards for improving the typical connection ratio of distribution network, improving the ratio of transferable power supply lines in distribution network, and improving the insulation level of distribution network in actual operation, the evaluation index system for improving the optimization of medium-voltage grid-type distribution network projects adopts: power supply level, load level, number of contact points after transformation, contact conditions, number of main line sections, and main line diameter. The assignment and judgment criteria of each indicator are shown in Table 10.

[0115] Table 10

[0116]

[0117] Among them, the meanings of power supply guarantee level and load level can refer to the description in the above embodiment and will not be repeated here. The number of contact points after the transformation is used to reflect the appropriate increase in the number of contact points to meet the needs of load transfer so as to improve the line utilization rate without causing the distribution network wiring to be too complicated. The contact situation is used to reflect the encouragement of load transfer to implement the principle of proximity and the principle of connection with the least substation, but the latter takes priority. The number of main line sections is used to reflect the appropriate increase in the number of main line sections to reduce the scope of power outages without causing the load transfer operation to be too complicated. The diameter of the main line is used to reflect whether the cross-section of the medium-voltage line conductor meets the "Guidelines for Planning of Distribution Networks of 110 kV and Below" and whether it can adapt to the load development needs in the power supply area.

[0118] The evaluation index system for replacing obsolete equipment or line-type distribution network projects generally includes: power supply level, load level, types of defects that have occurred in the past, years of operation, whether it requires explicit elimination, current status of equipment and other indicators. However, since distribution network equipment is generally rarely subjected to preventive tests, it is difficult to obtain data on the current status of equipment. Therefore, the evaluation index system for replacing obsolete equipment or line-type distribution network projects adopts 6 indicators: power supply level, load level, types of defects that have occurred in the past, years of operation, whether it requires explicit elimination, and current status of equipment. The value assignment and judgment criteria of each indicator are shown in Table 11.

[0119] Table 11

[0120]

[0121] Among them, the meanings of the power supply level and load level can be referred to the description in the above embodiments, which will not be repeated here. The types of historical defects are used to reflect the severity of the abnormal phenomena that affect the operation of equipment, lines or systems due to the operating equipment or lines themselves or related functions. The number of years of operation is used to reflect the length of time the equipment or line has been in operation. Whether it is required to be eliminated by order is used to reflect whether the existing equipment or lines are obsolete, low-standard, and high-loss and are required to be eliminated by order.

[0122] The evaluation index system for measuring the optimization of distribution network projects that reduce line losses generally includes: load level, line loss rate before transformation, average monthly power supply in the year before transformation, line power supply radius, annual power saving per 10,000 yuan investment, unqualified range for reducing line losses, target line loss rate and other indicators. However, since the unqualified range for reducing line losses is affected by load density and cannot represent the actual amount of power savings, and the target line loss rate is difficult to predict and control, this newspaper's optimization evaluation index system for investment projects that reduce line losses adopts five indicators: load level, line loss rate before transformation, average monthly power supply in the year before transformation, line power supply radius, and annual power saving per 10,000 yuan investment. The value assignment and judgment criteria for each indicator are shown in Table 12.

[0123] Table 12

[0124]

[0125] Among them, the meaning of the load level can refer to the description in the above embodiment, and will not be repeated here. The line loss rate before the transformation is used to reflect the severity of the power loss in the current line. The calculation formula is as follows: Line loss rate (%) = (line loss electricity / power supply) * 100%. The average monthly power supply in the year before the transformation is used to reflect the average monthly power supply in the year before the transformation to meet the electricity needs of all users. The line power supply radius is used to reflect the severity of the adverse effect of the current line power supply radius on reducing line losses. The annual electricity saving per 10,000 yuan investment is used to reflect the economic benefits of the distribution network investment. It refers to the amount of electricity saved corresponding to the investment of 10,000 yuan in the distribution network. The calculation formula is as follows: Annual electricity saving per 10,000 yuan investment (kwh / 10,000 yuan) = (annual line loss electricity before transformation (kwh) - annual line loss electricity after investment (kwh)) / total project investment (10,000 yuan).

[0126] In this embodiment, the above-mentioned evaluation index system is used to effectively evaluate the necessity and investment effect of distribution network projects such as improving the medium-voltage grid, replacing obsolete equipment or lines, and reducing line losses. It can not only identify and prioritize problems such as unreasonable grid structure, aging equipment, and high line losses, but also ensure the rationality and efficiency of investment, thereby improving the overall operating efficiency and service quality of the power grid, and enhancing the reliability and economy of the power grid.

[0127] In an exemplary embodiment, projects other than the above-mentioned projects to be optimized can be classified as "unclassified" projects. The evaluation index system for measuring the optimal selection of unclassified distribution network projects generally includes: the necessity of project establishment and other indicators are examined by experts, so the optimal selection evaluation index system for unclassified distribution network investment projects includes: the necessity of project establishment 1 indicator, the assignment and judgment criteria of the indicator are shown in Table 13 below.

[0128] Table 13

[0129]

[0130] Among them, the necessity of project establishment is used to reflect the necessity of distribution network investment.

[0131] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0132] Based on the same inventive concept, the embodiment of the present application also provides a distribution network project optimization device for implementing the distribution network project optimization method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more distribution network project optimization device embodiments provided below can refer to the limitations of the distribution network project optimization method above, and will not be repeated here.

[0133] In an exemplary embodiment, as shown in FIG2 , a distribution network project optimization device is provided, comprising:

[0134] The to-be-optimized project acquisition module 202 is used to acquire multiple to-be-optimized projects of the distribution network and multiple evaluation indicators corresponding to each to-be-optimized project;

[0135] The scoring result determination module 204 is used to determine the scoring results of each evaluation indicator corresponding to each project to be optimized based on the scoring criteria corresponding to each evaluation indicator;

[0136] The total score result determination module 206 is used to perform weighted calculation based on the score results of each evaluation indicator corresponding to each project to be optimized to obtain the total score result of each project to be optimized;

[0137] An optimization priority determination module 208 is used to determine the optimization priority of each to-be-optimized project based on the total score result of each to-be-optimized project;

[0138] The project optimization module 210 is used to optimize the distribution network project based on the optimization priority of each project to be optimized.

[0139] Each module in the above distribution network project optimization device can be implemented in whole or in part by software, hardware and their combination. Each module can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to each module above.

[0140] In an exemplary embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be shown in FIG3. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected via a system bus, and the communication interface is connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store evaluation indicators and scoring structure data. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a distribution network project optimization method is implemented.

[0141] Those skilled in the art will understand that the structure shown in FIG. 3 is merely a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0142] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0143] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0144] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0145] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0146] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0147] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A distribution network project optimization method, characterized in that: The method comprises: Acquire multiple items to be optimized in the distribution network, and multiple evaluation indicators corresponding to each of the items to be optimized; Determine the scoring results of the evaluation indicators corresponding to the projects to be optimized based on the scoring criteria corresponding to the evaluation indicators; Perform weighted calculation based on the scoring results of each evaluation indicator corresponding to each of the items to be optimized to obtain the total scoring results of each of the items to be optimized; Determine the optimization priority of each of the items to be optimized based on the total score results of each of the items to be optimized; Based on the optimization priority of each of the projects to be optimized, the distribution network project is optimized.

2. The method according to claim 1, characterized in that The projects to be optimized include medium-voltage line overload, medium-voltage line overload, medium-voltage line terminal voltage not meeting standards, new substation outgoing lines to meet the power supply needs of new loads, distribution transformer overload, distribution transformer overload, new substations to meet load demands, substation undervoltage, safety hazards in medium and low voltage lines, medium-voltage grid integrity, replacement of obsolete equipment or lines, and line loss reduction.

3. The method according to claim 2, characterized in that The evaluation indicators of the medium voltage line overload and the medium voltage line heavy load both include: Power supply level, load level, installed capacity of distribution transformers (including special transformers) before transformation, investment of 10,000 yuan to improve load factor, and customer complaints; Among them, the evaluation indicators of medium-voltage line overload also include: overload period, maximum load rate of the current overloaded line, time for the previous overloaded line to improve the grid, and load rate of the overloaded line after investment; the evaluation indicators of medium-voltage line overload also include: overload period, maximum load rate of the current overloaded line, time for the previous overloaded line to improve the grid, and load rate of the overloaded line after investment.

4. The method according to claim 2, characterized in that The evaluation indicators for the substandard voltage at the end of the medium voltage line include: Power supply level, load level, current medium-voltage line power supply radius, medium-voltage line power supply radius after investment, current trunk line diameter, the last time the grid was improved for this line, the voltage increase range per 10,000 yuan investment, and customer complaints.

5. The method according to claim 2, characterized in that The evaluation indicators for whether the new outgoing line of the substation meets the power supply requirements of the newly added loads include: Ensure power supply level, load level, maximum load rate of new lines in the first year, investment of 10,000 yuan to meet the new power supply load, and customer complaints.

6. The method according to claim 2, characterized in that The evaluation indicators of the distribution transformer overload and the distribution transformer heavy load both include: Power supply level, load level, actual number of users of the distribution transformer, time of the last distribution transformer area renovation, load improvement rate of 10,000 yuan investment, customer complaints, and whether it is a new point of deployment; Among them, the evaluation indicators of distribution transformer overload also include: overload period, maximum load rate of current overloaded distribution transformer, and load rate of overloaded distribution transformer after investment; among them, the evaluation indicators of distribution transformer overload also include: overload period, maximum load rate of current overloaded distribution transformer, and load rate of overloaded distribution transformer after investment.

7. The method according to claim 2, characterized in that The evaluation indicators of whether the newly built substation meets the load demand and the substation is undervoltage include: Power supply level, load level, and customer complaints; Among them, the evaluation indicators for whether the newly built substation meets the load demand also include: the maximum load rate of the new line in the first year, and the load demand can be met with an investment of 10,000 yuan; the evaluation indicators for substation undervoltage also include: the power supply radius of the current substation low-voltage line, the power supply radius of the substation low-voltage line after investment, the actual number of users affected by the annual substation undervoltage, the time of the previous distribution and transformation substation renovation, and the voltage increase amplitude with an investment of 10,000 yuan.

8. The method according to claim 2, characterized in that The evaluation indicators for the safety hazards existing in the medium and low voltage lines include: power supply level, load level, personal safety hazards, and operation hazards.

9. The method according to claim 2, characterized in that The evaluation indicators of the medium voltage grid integrity include: Power supply level, load level, number of contact points after transformation, contact situation, number of trunk line sections, and trunk line diameter; The evaluation indicators for replacing obsolete equipment or lines include: Power supply level, load level, types of historical defects, years of operation, whether there is a requirement for explicit elimination, and the current status of the equipment; The evaluation indicators for line loss reduction include: Load level, line loss rate before transformation, average monthly power supply in the year before transformation, line power supply radius, and annual electricity savings per 10,000 yuan investment.

10. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 9 are implemented.

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