Power grid development evaluation method based on safety and economy

Abstract

The invention relates to a power grid development evaluation method based on safety and economy, and the method comprises the steps: constructing a power grid input-output comprehensive evaluation system according to the capital investment condition of a transformer substation; then, correlation between the electric power data and the economic development data is analyzed, and a power grid development evaluation model is established; determining an adjustment range of evaluation indexes based on the power grid development evaluation model, establishing an objective function according to the adjustment range so as to determine the evaluation indexes, and determining an actual index value according to the actual improvement rate and the expected improvement rate of each evaluation index; finally, based on the evaluation indexes, the subjective weight and the objective weight of each evaluation index are determined through an analytic hierarchy process and an entropy weight method, and then based on the subjective weight and the objective weight, the comprehensive weight of each evaluation index is determined through a combined weighting method; and finally, according to the actual index value and the comprehensive weight of each evaluation index, calculating and generating a final evaluation report. The method has the advantages of accuracy and high efficiency.

Description

Technical Field

[0001] This invention belongs to the field of power grid development assessment technology, specifically relating to a power grid development assessment method based on safety and economy. Background Technology

[0002] Electricity plays a vital role in modern society. As the transmission carrier of electricity, the power grid's development status is an important issue. A rationally developed power grid can avoid resource waste and high power outage risks, while also meeting users' needs for economical and safe electricity, thus serving the development and progress of society. Currently, in assessing power grid development, existing technologies for studying the long-term evolution of power grids include small-world network evolution models and scale-free network evolution models. However, with development, these models cannot accurately reproduce the development status of modern power grids. To address these issues, it is necessary to develop an accurate and efficient power grid development assessment method based on security and economy. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a precise and efficient method for evaluating the development of power grids based on safety and economy.

[0004] The objective of this invention is achieved as follows: a method for evaluating the development of a power grid based on safety and economy, comprising the following steps: Step 1: Based on the substation's own capital investment and combined with the technical, social, and economic output benefits, construct a comprehensive evaluation system for key indicators of power grid input and output; Step 2: Based on the comprehensive evaluation system of key input-output indicators of the power grid, with the goal of minimizing the sum of the planned investment cost of the transmission network and the power generation cost within the planning period, and under constraints, analyze the correlation between power data and economic development data, determine the degree of impact of power data on economic development, and establish a power grid development evaluation model based on the correlation analysis results; Step 3: Based on the power grid development assessment model, determine the adjustment range of the assessment indicators, then establish the objective function accordingly to determine the assessment indicators, and finally determine the actual indicator value of each assessment indicator based on the actual improvement rate and expected improvement rate of each assessment indicator. Step 4: Based on the evaluation indicators in Step 3, first determine the subjective weight of each evaluation indicator using the analytic hierarchy process (AHP), then determine the objective weight of each evaluation indicator using the entropy weight method, and finally determine the comprehensive weight of each evaluation indicator based on the subjective and objective weights and using the combined weighting method. Step 5: Based on the actual index value and comprehensive weight of each evaluation indicator, calculate the actual score of each evaluation indicator and the actual comprehensive score of the target project. Finally, summarize and analyze the scores of the evaluation indicators and generate the final evaluation report.

[0005] Furthermore, the comprehensive power grid evaluation system in step 1 consists of a security assurance capability system, a resource allocation capability system, a green development capability system, an operational efficiency evaluation system, and a business efficiency evaluation system.

[0006] Furthermore, the constraints in step 2 include: upper and lower limits of generator active power, transmission line transmission capacity constraints, and transmission line capacity range constraints.

[0007] Furthermore, in step 4, when determining the subjective weight of each evaluation indicator using the analytic hierarchy process, the development quality of the power grid enterprise is taken as the target layer, and all evaluation indicators in the evaluation indicator system are taken as the criterion layer. The relative importance of the evaluation indicators is constructed into a judgment matrix, and a consistency test is performed. Thus, the subjective weight of each evaluation indicator is calculated.

[0008] Furthermore, in step 5, the evaluation report can be graded according to its content during the generation process, so that operators can intuitively understand the evaluation results.

[0009] The beneficial effects of this invention are as follows: First, based on the substation's own capital investment and combined with the technical, social, and economic output benefits, a comprehensive evaluation system of key indicators for power grid input and output is constructed. Then, based on this comprehensive evaluation system, with the objective of minimizing the sum of transmission network planning investment costs and power generation costs within the planning period, and under constraints, the correlation between power data and economic development data is analyzed to determine the degree of impact of power data on economic development. Based on the correlation analysis results, a power grid development evaluation model is established. Next, based on the power grid development evaluation model, the adjustment range of the evaluation indicators is determined, and subsequently, an objective function is established. The process involves determining the evaluation indicators, then setting the actual value of each indicator based on its actual and expected improvement rates. Finally, based on these indicators, the subjective and objective weights are determined using the analytic hierarchy process (AHP) and entropy weighting method, respectively. Subsequently, a combined weighting method is used to determine the overall weight of each indicator based on these subjective and objective weights. After completing these steps, the actual score for each indicator and the overall score for the target project are calculated based on their actual values ​​and overall weights. Finally, the scores of the evaluation indicators are summarized and analyzed to generate the final evaluation report. Overall, this invention offers the advantages of precision and efficiency. Detailed Implementation

[0010] The present invention will now be further described.

[0011] Example: A method for evaluating the development of a power grid based on safety and economy, comprising the following steps: Step 1: Based on the substation's own capital investment and combined with the technical, social, and economic output benefits, construct a comprehensive evaluation system for key indicators of power grid input and output. The comprehensive evaluation system for power grid consists of a safety assurance capability system, a resource allocation capability system, a green development capability system, an operational efficiency evaluation system, and a business efficiency evaluation system. Step 2: Based on the comprehensive evaluation system of key input and output indicators of the power grid, with the goal of minimizing the sum of the planned investment cost of the transmission network and the generation cost within the planning period, and under constraints such as the upper and lower limits of generator active power, transmission line capacity constraints, and transmission line capacity range constraints, the correlation between power data and economic development data is analyzed to determine the degree of impact of power data on economic development. At the same time, based on the correlation analysis results, a power grid development evaluation model is established. Step 3: Based on the power grid development assessment model, determine the adjustment range of the assessment indicators, then establish the objective function accordingly to determine the assessment indicators, and finally determine the actual indicator value of each assessment indicator based on the actual improvement rate and expected improvement rate of each assessment indicator. Step 4: Based on the evaluation indicators in Step 3, first determine the subjective weight of each evaluation indicator using the Analytic Hierarchy Process (AHP). Then, determine the objective weight of each evaluation indicator using the entropy weight method. Finally, based on the subjective and objective weights, determine the comprehensive weight of each evaluation indicator using the combined weighting method. When determining the subjective weight of each evaluation indicator using the AHP, the development quality of the power grid enterprise is taken as the target layer, and all evaluation indicators in the evaluation indicator system are taken as the criterion layer. The relative importance of the evaluation indicators is constructed into a judgment matrix, and a consistency test is performed. Thus, the subjective weight of each evaluation indicator is calculated. Step 5: Based on the actual index value and comprehensive weight of each evaluation indicator, calculate the actual score of each evaluation indicator and the actual comprehensive score of the target project. Finally, summarize and analyze the scores of the evaluation indicators and generate the final evaluation report. During the generation of the evaluation report, the evaluation can be graded according to the report content so that the operators can intuitively understand the evaluation results.

[0012] In its application, this invention first constructs a comprehensive evaluation system for key power grid input-output indicators based on the substation's own capital investment and the technological, social, and economic output benefits. This comprehensive evaluation system comprises a safety assurance capability system, a resource allocation capability system, a green development capability system, an operational efficiency evaluation system, and a business efficiency evaluation system. Then, based on this comprehensive evaluation system, with the objective of minimizing the sum of transmission network planning investment costs and generation costs within the planning period, and under constraints such as generator active power upper and lower limits, transmission line transmission capacity constraints, and transmission line capacity range constraints, the correlation between power data and economic development data is analyzed to determine the degree of impact of power data on economic development. Based on the correlation analysis results, a power grid development assessment model is established. Next, based on the power grid development assessment model, the adjustment range of the assessment indicators is determined. Subsequently, an objective function is established to determine the assessment indicators. Finally, based on the actual and expected improvement rates of each assessment indicator, the specific performance of each indicator is determined. The actual values ​​of the evaluation indicators are evaluated. Finally, based on the evaluation indicators, the subjective and objective weights of each evaluation indicator are determined using the analytic hierarchy process (AHP) and the entropy weight method, respectively. When determining the subjective weight of each evaluation indicator using the AHP, the development quality of the power grid enterprise is taken as the target layer, and all evaluation indicators in the evaluation indicator system are taken as the criterion layer. The relative importance of the evaluation indicators is constructed into a judgment matrix, and a consistency test is performed to calculate the subjective weight of each evaluation indicator. Then, based on the subjective and objective weights, the comprehensive weight of each evaluation indicator is determined using a combined weighting method. After completing the above operations, based on the actual value and comprehensive weight of each evaluation indicator, the actual score of each evaluation indicator and the actual comprehensive score of the target project are calculated. Finally, the scores of the evaluation indicators are summarized and analyzed to generate an evaluation report. Simultaneously, during the generation of the evaluation report, this invention can also classify the evaluation structure according to the report content, thereby facilitating the operator's intuitive understanding of the evaluation results. Overall, this invention has the advantages of accuracy and efficiency.

[0013] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A method for evaluating development of a power grid based on security and economy, characterized by, Comprise the following steps: Step 1: according to the substation itself investment, combined with the technology, social, economic output benefit, build power grid input-output key index comprehensive evaluation system; Step 2: based on the power grid input-output key index comprehensive evaluation system, with the minimum planning cycle transmission network planning investment cost and power generation cost as the goal, and under the constraint condition, the correlation between power data and economic development data is analyzed, the influence degree of power data on economic development is determined, and the power grid development evaluation model is established according to the correlation analysis result; Step 3: based on the power grid development evaluation model, the adjustment range of evaluation index is determined, then the objective function is established according to the adjustment range, so as to determine the evaluation index, then the actual index value of each evaluation index is determined according to the actual improvement rate and the expected improvement rate of each evaluation index; Step 4: according to the evaluation index in step 3, the subjective weight of each evaluation index is determined by analytic hierarchy process, then the objective weight of each evaluation index is determined by entropy weight method, finally, the comprehensive weight of each evaluation index is determined based on the subjective weight and the objective weight, and the combination weighting method is used; Step 5: according to the actual index value and the comprehensive weight of each evaluation index, the actual score of each evaluation index and the actual comprehensive score of the target project are calculated, the score of the evaluation index is finally summarized and analyzed, and the final evaluation report is generated.

2. The method for assessing the development of a power grid based on security and economy according to claim 1, characterized in that: The power grid comprehensive evaluation system in step 1 is composed of safety guarantee ability system, resource allocation ability system, green development ability system, operation benefit evaluation system and operation benefit evaluation system.

3. The method for assessing the development of a power grid based on security and economy according to claim 1, characterized in that: The constraint condition in step 2 includes: generator active power upper and lower limit constraint, transmission line transmission capacity constraint and transmission line capacity range constraint.

4. The method for assessing the development of a power grid based on security and economy according to claim 1, characterized in that: In step 4, the subjective weight of each evaluation index is determined by using analytic hierarchy process, taking the power grid enterprise development quality as the target layer, taking all evaluation indexes in the evaluation index system as the criterion layer, constructing the relative importance of evaluation indexes as judgment matrix, and performing consistency check, thereby calculating the subjective weight of each evaluation index.

5. The method for assessing the development of a power grid based on security and economy according to claim 1, characterized in that: In step 5, during the generation of the evaluation report, the report content can be graded for evaluation, so that the operating personnel can intuitively understand the evaluation result.