A distribution network engineering evaluation method based on a whole life cycle theory

Abstract

The application discloses a kind of based on whole life cycle theory's distribution network engineering evaluation method, belong to electric power distribution network engineering evaluation technical field, including establishing data dictionary to carry out data acquisition, to data analysis obtains construction construction safety evaluation index and operation and maintenance construction safety evaluation index value and obtains the weighted sum of two indexes to carry out evaluation index joint analysis.The application obtains the data needed by evaluation analysis by data acquisition, can quantitatively obtain construction construction safety evaluation index and operation and maintenance construction safety evaluation index by data analysis, solve the focus of existing post-evaluation work for the cost evaluation of planning to completion, there is no safety risk assessment for construction in the process of construction, operation and maintenance, cannot ensure that the construction safety risk of electric power distribution network engineering in the process of construction, operation and maintenance is in the state of controllable, in control and controllable, cannot carry out construction risk evaluation for electric power distribution network engineering in whole life cycle.

Description

Technical Field

[0001] This invention relates to a method for evaluating power distribution network projects, and more particularly to a method for evaluating power distribution network projects based on the full life cycle theory, belonging to the field of power distribution network project evaluation technology. Background Technology

[0002] As the foundation of the power industry, power distribution network engineering is characterized by its large scale and dispersed locations due to the rapid development of the power system. This makes it difficult to control the progress of power distribution network projects, and data and information management are often inadequate. Therefore, optimizing and evaluating the project framework and management process of power distribution network engineering to learn from valuable experiences in past projects has become crucial. However, in today's big data era, the complexity and sheer volume of information easily lead to information silos in power distribution network engineering, resulting in a lack of information exchange and hindering communication and coordination. With the increasing scale of power distribution network engineering, information management systems used for daily office tasks are no longer sufficient to meet the needs of actual construction. Post-project evaluation, in particular, is of paramount importance. Post-evaluation, through the construction data of power distribution network engineering, allows for the analysis of problems and difficulties encountered during the project, summarizing experiences and lessons learned. This reduces unnecessary investment costs caused by errors, meets the requirements of safe construction, and avoids delays caused by recurring problems and difficulties. A scientific post-evaluation system not only reflects problems encountered in the project but also provides a reference for future power distribution network engineering projects. However, the existing post-evaluation work focuses on cost evaluation from planning to completion, without conducting safety risk assessments of construction, operation and maintenance. This makes it impossible to ensure that the construction safety risks of power distribution network projects are controllable, under control and manageable during construction, operation and maintenance, and it is impossible to conduct construction risk assessments for power distribution network projects throughout their entire life cycle. To address the above shortcomings, this invention proposes a distribution network engineering evaluation method based on the full life cycle theory. Taking distribution network infrastructure construction as the object, it conducts safety risk assessments on construction, operation, and maintenance of power distribution network projects. This improves the construction safety risk assessment throughout the entire life cycle of power distribution network projects and classifies safety risks. It helps establish scientific levels of attention and early warning for the construction and operation of power distribution network projects throughout their entire life cycle based on construction operations with different safety risk levels. This enables the control of safety risks during construction and operation and maintenance to remain under control, ensuring effective management of power distribution network construction and operation and maintenance. The method also classifies the safety attention levels for construction and operation and maintenance, providing quantitative safety assessment values ​​and assessment levels with guiding significance for construction safety throughout the entire life cycle of power distribution network projects. This facilitates on-site management of power distribution network construction and operation and maintenance, enables the scientific allocation of construction personnel, improves the efficiency of power distribution network construction and operation and maintenance, and enhances safety awareness during construction and operation and maintenance. Summary of the Invention

[0003] The main purpose of this invention is to address the shortcomings of existing post-evaluation work, which focuses on cost evaluation from planning to completion, without conducting safety risk assessments during construction, operation, and maintenance. This makes it impossible to ensure that the construction safety risks of power distribution network projects are controllable, manageable, and manageable during construction, operation, and maintenance, and to conduct construction risk assessments for power distribution network projects throughout their entire life cycle. Therefore, this invention provides a distribution network project evaluation method based on the whole life cycle theory.

[0004] The objective of this invention can be achieved by adopting the following technical solution:

[0005] A distribution network engineering evaluation method based on the full life cycle theory includes the following steps:

[0006] S1. Data Acquisition: Collect construction and operation and maintenance data elements from power distribution network engineering data respectively, and establish a construction information data dictionary and an operation and maintenance information data dictionary based on the information of each project;

[0007] S2. Data Analysis: Data is acquired through construction information and operation and maintenance information dictionaries to create construction safety assessment models and operation and maintenance safety assessment models. In the construction safety assessment models, construction safety assessment indicators are used to evaluate the safety of the power distribution network construction process. These indicators are negatively correlated with the category of illegal construction operations, negatively correlated with the total number of illegal construction operations, positively correlated with the ratio of the number of on-site safety management personnel to the set number of on-site safety management personnel, and negatively correlated with the product of the number of personnel injuries and the number of equipment damages during construction. The evaluation formula for the construction safety assessment indicators is:

[0008]

[0009] In the formula: For construction safety assessment indicators, The number of categories for illegal construction operations. This is the category number for illegal construction operations. For the serial number The number of times illegal construction operations were carried out under the category of illegal construction operations. The number of on-site safety management personnel, To determine the number of on-site safety management personnel, This refers to the number of casualties during the construction process. The number of equipment damaged during the construction process;

[0010] In the operation and maintenance safety assessment model, the safety of the distribution network operation and maintenance construction process is evaluated using operation and maintenance construction safety assessment indicators. These indicators are negatively correlated with the grid overload rate, negatively correlated with the average power outage duration for distribution network users, and positively correlated with the overall voltage qualification rate of the distribution network. The evaluation formula for these operation and maintenance construction safety assessment indicators is as follows:

[0011] ;

[0012] In the formula: As an indicator for operation and maintenance construction safety assessment, For the heavy overload rate of the power grid, The average power outage duration for distribution network users. The overall voltage qualification rate of the distribution network;

[0013] S3. Joint Analysis of Evaluation Indicators: The comprehensive evaluation of construction safety is based on the combined assessment of construction safety indicators and operation and maintenance safety indicators. The comprehensive evaluation of construction safety is the sum of the weighted values ​​of the construction safety indicators and the operation and maintenance safety indicators.

[0014] As a further method of the present invention, in the evaluation formula of the comprehensive construction safety evaluation value in S3, the weights of the construction safety evaluation index and the operation and maintenance safety evaluation index are 0.5 and 0.5 respectively, and the evaluation formula of the comprehensive construction safety evaluation value is as follows:

[0015] ;

[0016] In the formula: This is the comprehensive assessment value for construction safety.

[0017] As a further method of the present invention, the evaluation method further includes step S4, the specific content of which is as follows:

[0018] S4. Grading Assessment of Comprehensive Construction Safety Evaluation Values: The construction safety evaluation values ​​are standardized and regularized to obtain sample values ​​of the construction safety evaluation values. A linear transformation is performed on the sample values ​​of the construction safety assessment to generate the transformed values ​​of the construction safety assessment. The transformation formula is: ,Will Substitute it into the function as the independent variable. Using function values The comprehensive assessment value of construction safety is evaluated in a graded manner, and the grading method is as follows:

[0019] when At that time, the comprehensive safety assessment level for construction was Level 1;

[0020] when At that time, the comprehensive safety assessment level for construction was Level II.

[0021] As a further method of the present invention, in S1, the categories of illegal construction operations during the construction process and the number of illegal constructions under each category are stored and extracted using a data dictionary as illegal construction data. The actual number of on-site safety management personnel, the number of on-site safety management personnel, the number of personnel casualties and equipment damage during the construction process are extracted as safety construction management data. The actual amount of materials and the set amount of materials required are extracted as material safety data. The power grid overload rate, the average power outage time of distribution network users, and the comprehensive voltage qualification rate of distribution network are extracted as operation and maintenance safety data during the operation and maintenance construction process.

[0022] As a further method of the present invention, in S2, the average power outage duration for distribution network users is the ratio of the total power outage duration for distribution network users to the total number of distribution network users. The formula for the average power outage duration for distribution network users is:

[0023] ;

[0024] In the formula: This represents the total number of distribution network users. For distribution network user serial numbers, For the distribution network user serial number is The power outage duration for a user is usually calculated as the total power outage duration of one month.

[0025] As a further method of the present invention, the specific steps for standardizing and regularizing the comprehensive construction safety assessment value in S4 are as follows:

[0026] Standardization: The mean and variance of the numerical sample of the comprehensive construction safety assessment value are calculated. Then, the mean is subtracted from each data point, and the difference is divided by the variance to obtain the standardized comprehensive construction safety assessment value.

[0027] Regularization: The standardized comprehensive construction safety assessment values ​​are formed into a regularized vector of standard comprehensive construction safety assessment values. The norm of the regularized vector of standard comprehensive construction safety assessment values ​​is obtained. Each data in the regularized vector of standard comprehensive construction safety assessment values ​​is divided by the norm of the vector to obtain the regularized comprehensive construction safety assessment value.

[0028] The beneficial technical effects of this invention are as follows: According to the power distribution network engineering evaluation method based on the full life cycle theory of this invention, data collection enables the formation of a data dictionary from various categories of data, facilitating data retrieval and classification, improving the efficiency and accuracy of data extraction, and providing a data foundation for subsequent data analysis. Through data analysis, numerical evaluation models can be created for construction safety during construction and construction safety during operation and maintenance, facilitating safety assessments throughout the entire life cycle of power distribution network engineering. Quantitative calculation of construction safety assessment indicators and operation and maintenance safety assessment indicators allows for safety risk assessments during construction and operation and maintenance processes. This helps ensure that safety risks throughout the entire life cycle are under control, within control, and manageable. It also helps establish scientific levels of attention and early warning for construction operations based on different safety risk levels, ensuring effective management and evaluation of safe construction in power distribution network engineering. Furthermore, it provides a guiding safety risk assessment level for power distribution network engineering, provides data basis and guidance for the scientific allocation of construction personnel, facilitates improved efficiency in the construction and operation and maintenance of power distribution network engineering, and enhances safety awareness during construction and operation and maintenance processes. Attached Figure Description

[0029] Figure 1 This is a flowchart of the power distribution network engineering evaluation method based on the full life cycle theory according to the present invention. Detailed Implementation

[0030] To enable those skilled in the art to understand the technical solution of the present invention more clearly, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0031] like Figure 1 As shown in this embodiment, the power distribution network engineering evaluation method based on the full life cycle theory includes the following steps:

[0032] S1. Data Acquisition: Collect construction and operation and maintenance data elements from power distribution network engineering data respectively, and establish a construction information data dictionary and an operation and maintenance information data dictionary based on the information of each project;

[0033] S2. Data Analysis: Data is acquired through construction information and operation and maintenance information dictionaries to create construction safety assessment models and operation and maintenance safety assessment models. In the construction safety assessment models, construction safety assessment indicators are used to evaluate the safety of the power distribution network construction process. These indicators are negatively correlated with the category of illegal construction operations, negatively correlated with the total number of illegal construction operations, positively correlated with the ratio of the number of on-site safety management personnel to the set number of on-site safety management personnel, and negatively correlated with the product of the number of personnel injuries and the number of equipment damages during construction. The evaluation formula for the construction safety assessment indicators is:

[0034]

[0035] In the formula: For construction safety assessment indicators, The number of categories for illegal construction operations. This is the category number for illegal construction operations. For the serial number The number of times illegal construction operations were carried out under the category of illegal construction operations. The number of on-site safety management personnel, To determine the number of on-site safety management personnel, This refers to the number of casualties during the construction process. The number of equipment damaged during the construction process;

[0036] In the operation and maintenance safety assessment model, the safety of the distribution network operation and maintenance construction process is evaluated using operation and maintenance construction safety assessment indicators. These indicators are negatively correlated with the grid overload rate, negatively correlated with the average power outage duration for distribution network users, and positively correlated with the overall voltage qualification rate of the distribution network. The evaluation formula for these operation and maintenance construction safety assessment indicators is as follows:

[0037] ;

[0038] In the formula: As an indicator for operation and maintenance construction safety assessment, For the heavy overload rate of the power grid, The average power outage duration for distribution network users. The overall voltage qualification rate of the distribution network;

[0039] S3. Joint Analysis of Evaluation Indicators: The comprehensive evaluation of construction safety is based on the combined assessment of construction safety indicators and operation and maintenance safety indicators. The comprehensive evaluation of construction safety is the sum of the weighted values ​​of the construction safety indicators and the operation and maintenance safety indicators.

[0040] This invention proposes a power distribution network engineering evaluation method based on the full life cycle theory. Through data collection, it utilizes various categorized data to form a data dictionary, facilitating data retrieval and classification, improving data extraction efficiency and accuracy, and providing a data foundation for subsequent data analysis. Through data analysis, it can create numerical evaluation models for construction safety during construction and operation and maintenance, facilitating safety assessments throughout the entire life cycle of power distribution network projects. By quantitatively calculating construction safety evaluation indicators and operation and maintenance safety evaluation indicators, it assesses safety risks during construction and operation and maintenance processes, helping to ensure that safety risks throughout the entire life cycle are under control, within control, and manageable. It helps establish scientific attention levels and early warning states based on construction operations with different safety risk levels, ensuring effective management and evaluation of safe construction in power distribution network projects. It provides guiding safety risk assessment levels for power distribution network projects, offering data basis and guidance for the scientific allocation of construction personnel, facilitating improved efficiency in construction and operation and maintenance of power distribution network projects, and enhancing safety awareness during construction and operation and maintenance processes.

[0041] In the evaluation formula for the comprehensive construction safety assessment value in S3, the weights of the construction safety assessment index and the operation and maintenance safety assessment index are 0.5 and 0.5 respectively. The evaluation formula for the comprehensive construction safety assessment value is as follows:

[0042] ;

[0043] In the formula: This is the comprehensive assessment value for construction safety.

[0044] By setting the formula for the comprehensive construction safety assessment value, both construction safety assessment indicators and operation and maintenance construction safety assessment indicators can be considered together. This helps to assess construction safety throughout the entire life cycle by considering both indicators simultaneously. By setting the weights of the two indicators to 0.5 and 0.5 respectively, the safety assessment of both indicators throughout the entire life cycle can be evaluated and considered equally, avoiding unscientific and unreasonable assessment indicators caused by a single factor.

[0045] The evaluation method further includes step S4, the specific content of which is as follows:

[0046] S4. Grading Assessment of Comprehensive Construction Safety Evaluation Values: The construction safety evaluation values ​​are standardized and regularized to obtain sample values ​​of the construction safety evaluation values. A linear transformation is performed on the sample values ​​of the construction safety assessment to generate the transformed values ​​of the construction safety assessment. The transformation formula is: ,Will Substitute it into the function as the independent variable. Using function values The comprehensive assessment value of construction safety is evaluated in a graded manner, and the grading method is as follows:

[0047] when At that time, the comprehensive safety assessment level for construction was Level 1;

[0048] when At that time, the comprehensive safety assessment level for construction was Level II.

[0049] By standardizing and regularizing the comprehensive construction safety assessment values, we can increase the diversity of sample data for these values, avoid data clustering, and prevent data from becoming too concentrated, which would hinder analysis and interpretation. By classifying the construction safety assessment values, we can transform complex data indicators into intuitive classifications, thereby improving the efficiency of safety assessment and viewing throughout the entire construction and operation process of power distribution network projects. This will facilitate the assessment of safety throughout the entire lifecycle of construction and operation.

[0050] In S1, a data dictionary is used to store and extract the categories of illegal construction operations during the construction process and the number of illegal construction operations under each category as illegal construction data. The actual number of on-site safety management personnel, the number of on-site safety management personnel, the number of personnel casualties and equipment damage during the construction process are extracted as safety construction management data. The actual amount of materials and the set amount of materials are extracted as material safety data. The power grid overload rate, the average power outage time of distribution network users, and the comprehensive voltage qualification rate of distribution network are extracted as operation and maintenance safety data.

[0051] Data extraction through a data dictionary facilitates the management of different data and projects based on data classification and categorization. This avoids the complexity of data storage caused by excessive data volume, improves the speed and efficiency of overall data extraction, and provides a data foundation for subsequent data analysis.

[0052] The average power outage duration for distribution network users in S2 is the ratio of the total power outage duration for distribution network users to the total number of distribution network users. The formula for the average power outage duration for distribution network users is:

[0053] ;

[0054] In the formula: This represents the total number of distribution network users. For distribution network user serial numbers, For the distribution network user serial number is The power outage duration for a user is usually calculated as the total power outage duration of one month.

[0055] By setting the formula for the average power outage duration of distribution network users, it is possible to average the power outage duration of users in the entire power distribution network project. This avoids the situation where power outage durations caused by a single factor are too long or too short and cannot represent the power outage duration within the entire distribution network project, thereby improving the accuracy and representativeness of power outage duration assessment.

[0056] The specific steps for standardizing and regularizing the comprehensive construction safety assessment value in S4 are as follows:

[0057] Standardization: The mean and variance of the numerical sample of the comprehensive construction safety assessment value are calculated. Then, the mean is subtracted from each data point, and the difference is divided by the variance to obtain the standardized comprehensive construction safety assessment value.

[0058] Regularization: The standardized comprehensive construction safety assessment values ​​are formed into a regularized vector of standard comprehensive construction safety assessment values. The norm of the regularized vector of standard comprehensive construction safety assessment values ​​is obtained. Each data in the regularized vector of standard comprehensive construction safety assessment values ​​is divided by the norm of the vector to obtain the regularized comprehensive construction safety assessment value.

[0059] The purpose of standardizing and regularizing the data is to facilitate the subsequent classification of the comprehensive construction safety assessment value, and to avoid the inability to effectively classify and assess the comprehensive construction safety assessment value due to its singularity.

[0060] In summary, this embodiment, based on the life-cycle theory-based power distribution network project evaluation method, utilizes a comprehensive construction safety assessment formula to consider both construction safety assessment indicators and operation and maintenance safety assessment indicators. This allows for a simultaneous assessment of construction safety throughout the entire lifecycle. Setting the weights of the two indicators to 0.5 and 0.5 respectively ensures an equal evaluation and consideration of their impact on overall lifecycle safety, preventing unscientific and unreasonable assessment indicators caused by a single factor. Standardizing and regularizing the comprehensive construction safety assessment value increases the diversity of sample data, preventing data aggregation and hindering data analysis. Furthermore, the tiered assessment of construction safety assessment values ​​transforms complex data indicators into intuitive tiers, improving the efficiency of safety assessment throughout the entire construction and operation and maintenance process of power distribution networks, thus facilitating the assessment of safety throughout the entire lifecycle of construction and operation. Data extraction via a data dictionary facilitates the management of different data types and projects based on data classification and categorization. This avoids the complexity of data storage caused by excessive data volume, improves the speed and efficiency of overall data extraction, and provides a solid data foundation for subsequent data analysis. Setting an average outage duration formula for distribution network users allows for the averaging of outage durations across the entire power distribution network project. This prevents outage durations caused by a single factor from being too long or too short, thus avoiding inaccuracies in representing the overall outage duration within the distribution network and improving the accuracy and representativeness of outage duration assessments. Data standardization and regularization facilitate the subsequent grading of comprehensive construction safety assessment values, preventing the inability to effectively grade and assess construction safety based on a single value.

[0061] The above description is merely a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. A distribution network engineering evaluation method based on the full life cycle theory, characterized in that, Includes the following steps: S1. Data Acquisition: Collect construction and operation and maintenance data elements from power distribution network engineering data respectively, and establish a construction information data dictionary and an operation and maintenance information data dictionary based on the information of each project; S2. Data Analysis: Data is acquired through construction information and operation and maintenance information dictionaries to create construction safety assessment models and operation and maintenance safety assessment models. In the construction safety assessment models, construction safety assessment indicators are used to evaluate the safety of the power distribution network construction process. These indicators are negatively correlated with the category of illegal construction operations, negatively correlated with the total number of illegal construction operations, positively correlated with the ratio of the number of on-site safety management personnel to the set number of on-site safety management personnel, and negatively correlated with the product of the number of personnel injuries and the number of equipment damages during construction. The evaluation formula for the construction safety assessment indicators is: ； In the formula: For construction safety assessment indicators, The number of categories for illegal construction operations. This is the category number for illegal construction operations. For the serial number The number of times illegal construction operations were carried out under the category of illegal construction operations. The number of on-site safety management personnel. To determine the number of on-site safety management personnel, This refers to the number of casualties during the construction process. The number of equipment damaged during the construction process; In the operation and maintenance safety assessment model, the safety of the distribution network operation and maintenance construction process is evaluated using operation and maintenance construction safety assessment indicators. These indicators are negatively correlated with the grid overload rate, negatively correlated with the average power outage duration for distribution network users, and positively correlated with the overall voltage qualification rate of the distribution network. The evaluation formula for these operation and maintenance construction safety assessment indicators is as follows: ； In the formula: As an indicator for safety assessment of operation and maintenance construction, For the heavy overload rate of the power grid, The average power outage duration for distribution network users. The overall voltage qualification rate of the distribution network; S3. Joint Analysis of Evaluation Indicators: The comprehensive evaluation of construction safety is based on the combined assessment of construction safety indicators and operation and maintenance safety indicators. The comprehensive evaluation of construction safety is the sum of the weighted values ​​of the construction safety indicators and the operation and maintenance safety indicators.

2. The distribution network engineering evaluation method based on the full life cycle theory as described in claim 1, characterized in that, In the evaluation formula for the comprehensive construction safety assessment value in S3, the weights of the construction safety assessment index and the operation and maintenance safety assessment index are 0.5 and 0.5 respectively. The evaluation formula for the comprehensive construction safety assessment value is as follows: ； In the formula: This is the comprehensive assessment value for construction safety.

3. The distribution network engineering evaluation method based on the full life cycle theory as described in claim 2, characterized in that, The evaluation method further includes step S4, the specific content of which is as follows: S4. Grading Assessment of Comprehensive Construction Safety Evaluation Values: The construction safety evaluation values ​​are standardized and regularized to obtain sample values ​​of the construction safety evaluation values. A linear transformation is performed on the sample values ​​of the construction safety assessment to generate the transformed values ​​of the construction safety assessment. The transformation formula is: ,Will Substitute it into the function as the independent variable. Using function values The comprehensive assessment value of construction safety is evaluated in a graded manner, and the grading method is as follows: when At that time, the comprehensive safety assessment level for construction was Level 1; when At that time, the comprehensive safety assessment level for construction was Level II.

4. The distribution network engineering evaluation method based on the full life cycle theory as described in claim 1, characterized in that, In S1, a data dictionary is used to store and extract the categories of illegal construction operations during the construction process and the number of illegal construction operations under each category as illegal construction data. The actual number of on-site safety management personnel, the number of on-site safety management personnel, the number of personnel casualties and equipment damage during the construction process are extracted as safety construction management data. The actual amount of materials and the set amount of materials are extracted as material safety data. The power grid overload rate, the average power outage time of distribution network users, and the comprehensive voltage qualification rate of distribution network are extracted as operation and maintenance safety data.

5. The distribution network engineering evaluation method based on the full life cycle theory as described in claim 1, characterized in that, The average power outage duration for distribution network users in S2 is the ratio of the total power outage duration for distribution network users to the total number of distribution network users. The formula for the average power outage duration for distribution network users is: ； In the formula: This represents the total number of distribution network users. For distribution network user serial number, For the distribution network user serial number is The power outage duration for a user is usually calculated as the total power outage duration of one month.

6. The distribution network engineering evaluation method based on the full life cycle theory as described in claim 3, characterized in that, The specific steps for standardizing and regularizing the comprehensive construction safety assessment value in S4 are as follows: Standardization: The mean and variance of the numerical sample of the comprehensive construction safety assessment value are calculated. Then, the mean is subtracted from each data point, and the difference is divided by the variance to obtain the standardized comprehensive construction safety assessment value. Regularization: The standardized comprehensive construction safety assessment values ​​are formed into a regularized vector of standard comprehensive construction safety assessment values. The norm of the regularized vector of standard comprehensive construction safety assessment values ​​is obtained. Each data in the regularized vector of standard comprehensive construction safety assessment values ​​is divided by the norm of the vector to obtain the regularized comprehensive construction safety assessment value.

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