Evaluation Method and System for the Contribution Degree of the Comprehensive Loss Reduction Configuration Strategy of the Distribution Network

Abstract

The present invention provides a method and system for evaluating the contribution degree of a comprehensive power distribution network loss reduction configuration strategy, which obtains the measure data adopted in the comprehensive power distribution network loss reduction plan; each measure data corresponds to a sub-loss reduction plan; the total input cost of the comprehensive loss reduction plan is converted into the sum of the costs of each sub-loss reduction plan to obtain the equivalent total benefit; according to the equivalent total benefit and the benefits of each sub-loss reduction plan, the total benefit change amount when each sub-loss reduction plan is implemented independently is obtained; according to the benefits of each sub-loss reduction plan, the benefit ratio of each sub-loss reduction plan and the total benefit change amount, the contribution value of each measure to the total benefit is obtained, and the contribution degree is evaluated according to the size of the contribution value; the present invention accurately evaluates and ranks the contribution degrees of various measures of the adopted comprehensive power distribution network loss reduction configuration strategy, providing a reference for decision-makers to select the power distribution network loss reduction strategy and the priority order of various measures.

Description

Technical Field

[0001] The present invention relates to the technical field of loss reduction assessment, and particularly to a method and system for evaluating the contribution degree of a comprehensive loss reduction configuration strategy for a distribution network. Background Art

[0002] The statements in this part merely provide the background art related to the present invention and do not necessarily constitute the prior art.

[0003] Line loss is an important indicator for measuring the scientificity and rationality of power grid operation. In the loss calculation of the provincial power grid company, the losses of the medium and low voltage distribution network can account for 35% - 40% of the total network losses, having great loss reduction space and economic benefits. The commonly adopted loss reduction measures include: optimizing the network structure and reducing the power supply radius of the line; adding parallel operating lines or increasing the conductor cross-section; replacing the economic transformer; adding reactive power compensation devices, and improving the three-phase unbalance condition. With the rapid development of distributed energy (Distribution Generator, DG) which is low-cost, flexible in power generation, and clean and environmentally friendly, the proportion of new energy connected to the distribution network gradually increases. For the distribution network mainly with a radial structure, the power flow path changes from the traditional unidirectional node to a bidirectional power flow node, which not only changes the voltage and power distribution, but also generates additional losses. In view of the random characteristics of new energy power generation, various optimization dispatching methods, including the optimization dispatching of energy storage devices, the orderly charging of electric vehicles, and the dispatching of adjustable industrial loads, have become loss reduction means in the active distribution network.

[0004] The inventor found that the evaluation of distribution network loss reduction mostly focuses on the perspective of energy efficiency evaluation, that is, the index system still starts from the power grid perspective, without fully considering the comprehensive benefits of the environment, industry, and society, and only one-sidedly pursues the maximum energy consumption without considering the cost paid for this; the existing evaluation results only target the energy efficiency level of the distribution network after loss reduction, and cannot quantitatively analyze each basic measure in the comprehensive loss reduction plan, and cannot provide the decision-maker with the priority order of the measures. Summary of the Invention

[0005] In order to solve the deficiencies of the prior art, the present invention provides a method and system for evaluating the contribution degree of a comprehensive loss reduction configuration strategy for a distribution network, which accurately evaluates and ranks the contribution degrees of various measures of the adopted comprehensive loss reduction configuration strategy for the distribution network, and provides a reference for the decision-maker to select the loss reduction strategy for the distribution network and the priority order of various measures.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The first aspect of the present invention provides a method for evaluating the contribution degree of a comprehensive loss reduction configuration strategy for a distribution network.

[0008] A method for evaluating the contribution degree of a comprehensive power distribution network loss reduction configuration strategy includes the following processes:

[0009] Obtain the measure data adopted in the comprehensive power distribution network loss reduction plan;

[0010] Each measure data corresponds to a sub-loss reduction plan;

[0011] Convert the total input cost of the comprehensive loss reduction plan to the sum of the costs of each sub-loss reduction plan to obtain the equivalent total benefit;

[0012] Based on the equivalent total benefit and the benefits of each sub-loss reduction plan, obtain the total benefit change when each sub-loss reduction plan is implemented independently;

[0013] Based on the benefits of each sub-loss reduction plan, the benefit ratio of each sub-loss reduction plan, and the total benefit change, obtain the contribution value of each measure to the total benefit, and evaluate the contribution degree according to the size of the contribution value.

[0014] Furthermore, the benefit ratio of the sub-loss reduction plan is the ratio of the corresponding benefit to the cost.

[0015] Furthermore, the equivalent total benefit is: the product of the sum of the costs of each sub-loss reduction plan and the benefit ratio of the comprehensive loss reduction plan.

[0016] Furthermore, the total benefit change is: the difference between the equivalent total benefit and the total benefit of each sub-loss reduction plan.

[0017] Furthermore, the contribution value X i ' of a certain measure i to the total benefit is:

[0018]

[0019] Among them, X i is the benefit of the sub-loss reduction plan corresponding to measure i, K i is the benefit ratio of the sub-loss reduction plan corresponding to measure i, n is the total number of measures, and ΔX ∑ is the total benefit change.

[0020] Furthermore, sort the contribution values of each loss reduction measure to the total benefit from large to small. The greater the contribution value of the loss reduction measure, the greater the contribution degree to the total benefit.

[0021] The second aspect of the present invention provides a system for evaluating the contribution degree of a comprehensive power distribution network loss reduction configuration strategy.

[0022] A system for evaluating the contribution degree of a comprehensive power distribution network loss reduction configuration strategy includes:

[0023] A data acquisition module configured to: obtain the measure data adopted in the comprehensive power distribution network loss reduction plan;

[0024] The measure decomposition module is configured such that each measure data corresponds to a sub-loss reduction plan;

[0025] The equivalent total benefit calculation module is configured to convert the total input cost of the comprehensive loss reduction plan into the sum of the costs of each sub-loss reduction plan to obtain the equivalent total benefit;

[0026] The total benefit change amount calculation module is configured to obtain the total benefit change amount when each sub-loss reduction plan is implemented independently according to the equivalent total benefit and the benefits of each sub-loss reduction plan;

[0027] The contribution degree evaluation module is configured to obtain the contribution value of each measure to the total benefit according to the benefits of each sub-loss reduction plan, the benefit ratio of each sub-loss reduction plan, and the total benefit change amount, and perform contribution degree evaluation according to the size of the contribution value.

[0028] The third aspect of the present invention provides a computer-readable storage medium, on which a program is stored, and when the program is executed by a processor, the steps in the contribution degree evaluation method of the distribution network comprehensive loss reduction configuration strategy described in the first aspect of the present invention are implemented.

[0029] The fourth aspect of the present invention provides an electronic device, including a memory, a processor, and a program stored on the memory and executable on the processor. When the processor executes the program, the steps in the contribution degree evaluation method of the distribution network comprehensive loss reduction configuration strategy described in the first aspect of the present invention are implemented.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] 1. The contribution degree evaluation method and system of the distribution network comprehensive loss reduction configuration strategy described in the present invention accurately evaluate and rank various measures of the adopted distribution network comprehensive loss reduction configuration strategy, providing a reference for decision-makers to select the distribution network loss reduction strategy and the priority order of various measures.

[0032] 2. The contribution degree evaluation method and system of the distribution network comprehensive loss reduction configuration strategy described in the present invention solve the problem that the current distribution network loss reduction evaluation is mostly based on the perspective of energy efficiency evaluation, and the evaluation results only target the energy efficiency level of the distribution network after loss reduction and cannot quantitatively analyze each basic measure in the comprehensive loss reduction plan, greatly improving the accuracy and credibility of the evaluation results.

[0033] The advantages of the additional aspects of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0034] The accompanying drawings forming a part of this invention are used to provide a further understanding of the invention. The schematic embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0035] Figure 1 It is a schematic flow chart of the contribution degree evaluation method for the comprehensive loss reduction configuration strategy of the distribution network provided in Embodiment 1 of the present invention. Detailed implementation manners

[0036] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanations of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0038] It should be noted that the terms used herein are only for describing specific implementation manners and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0039] In the case of no conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0040] Embodiment 1:

[0041] As Figure 1 shown, Embodiment 1 of the present invention provides a contribution degree evaluation method for the comprehensive loss reduction configuration strategy of the distribution network, including the following processes:

[0042] S1: Determine the comprehensive loss reduction plan, decompose the basic measures in the plan, and calculate the index values of the implementation of the plan

[0043] In the past, the evaluation of distribution network loss reduction mostly measured the economic benefits generated by loss reduction savings from an economic perspective, or measured the energy efficiency change from the improvement of grid characteristics. The ultimate goal was often the weighted sum of each sub-goal, and it could not reflect the return rate of optimization measures or the cost paid to generate equivalent energy efficiency.

[0044] A certain distribution network comprehensive loss reduction plan M takes measures m1 and m2 to be implemented together. To analyze the contribution degrees of m1 and m2, construct plans M1 = {m1} and M2 = {m2}, calculate the indicators of the plans and evaluate them by the analytic hierarchy process. The sub-goals and comprehensive indicators are as follows:

[0045]

[0046] As an organic whole, the power grid inevitably has mutual influences among measures. Therefore, there must be:

[0047]

[0048] S2: The total benefit of reducing the scheme to cost;

[0049] When the total input cost Y in M is reduced to Y1 + Y2, the equivalent total benefit that the scheme can obtain should be:

[0050] X′ 12 = K 12 (Y1 + Y2)(2) S3: Calculate the benefit values generated by the interaction of each measure

[0051] When compared with the independent implementation of m1 and m2 respectively, the change in the total benefit is: ΔX = X′ 12 -(X1 + X2) = ΔX1 + ΔX2 (3) S4: Each measure shares the common benefit according to the benefit-cost ratio and calculates the benefit value of each measure;

[0052] A feasible principle for m1 and m2 to share ΔX is based on their respective benefit-cost ratios, that is

[0053] S5: Statistically analyze the benefit values of each measure and sort them according to the magnitude.

[0054] At this time, the contribution values of m1 and m2 to the final benefit are respectively:

[0055] That is, when multiple measures act together, the contribution of each measure to the loss reduction effect consists of two parts: one part is the contribution generated independently by the measure, and the other part is the contribution allocated according to its benefit ratio.

[0056] By analogy, if a comprehensive loss reduction decision-making scheme for a certain distribution network is jointly implemented by M = {m1, m2,... m n} n measures, and its benefits and costs are X and Y respectively, and the benefits generated by each measure when implemented independently are X1, X2,...., X n , the cost is Y1, Y2,...., Y n , the benefit ratio is K1, K2,...., K n , and the total benefit of the scheme M reduced to cost is:

[0057] Let

[0058] Then the contribution value of measure m i is: According to the calculation results of formula (8), the contribution degrees of various loss reduction measures in the decision-making scheme can be sorted from large to small.

[0059] Embodiment 2:

[0060] Embodiment 2 of the present invention provides a contribution degree evaluation system for a comprehensive loss reduction configuration strategy of a distribution network, including:

[0061] A data acquisition module, configured to: acquire the measure data adopted by the comprehensive loss reduction scheme of the distribution network;

[0062] A measure decomposition module, configured to: each measure data corresponds to a sub-loss reduction scheme;

[0063] An equivalent total benefit calculation module, configured to: convert the total input cost of the comprehensive loss reduction scheme into the sum of the costs of each sub-loss reduction scheme to obtain the equivalent total benefit;

[0064] A total benefit change calculation module, configured to: obtain the total benefit change when each sub-loss reduction scheme is independently implemented according to the equivalent total benefit and the benefits of each sub-loss reduction scheme;

[0065] A contribution degree evaluation module, configured to: obtain the contribution value of each measure to the total benefit according to the benefits of each sub-loss reduction scheme, the income ratio of each sub-loss reduction scheme, and the total benefit change, and perform contribution degree evaluation according to the size of the contribution value.

[0066] The working method of the system is the same as the contribution degree evaluation method for the comprehensive loss reduction configuration strategy of the distribution network provided in Embodiment 1, and will not be elaborated here.

[0067] Embodiment 3:

[0068] Embodiment 3 of the present invention provides a computer-readable storage medium, on which a program is stored, and when the program is executed by a processor, it implements the steps in the contribution degree evaluation method for the comprehensive loss reduction configuration strategy of the distribution network as described in Embodiment 1 of the present invention.

[0069] Embodiment 4:

[0070] Embodiment 4 of the present invention provides an electronic device, including a memory, a processor, and a program stored on the memory and executable on the processor. When the processor executes the program, it implements the steps in the contribution degree evaluation method for the comprehensive loss reduction configuration strategy of the distribution network as described in Embodiment 1 of the present invention.

[0071] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a system, or a computer program product. Therefore, the present invention can take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memories and optical memories, etc.) that contain computer-usable program code.

[0072] The present invention is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present invention. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0073] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing devices to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0074] These computer program instructions can also be loaded onto a computer or other programmable data processing devices, such that a series of operation steps are executed on the computer or other programmable devices to generate a computer-implemented process, so that the instructions executed on the computer or other programmable devices provide steps for implementing the functions specified in Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0075] Those of ordinary skill in the art can understand that to implement all or part of the processes in the above-mentioned embodiment methods, it can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above-mentioned method embodiments. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM), etc.

[0076] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An evaluation method for the contribution degree of a comprehensive power distribution network loss reduction configuration strategy, characterized in that: It includes the following processes: Obtain the measure data adopted by the comprehensive power distribution network loss reduction plan; Each measure data corresponds to a sub-loss reduction plan; Convert the total input cost of the comprehensive loss reduction plan into the sum of the costs of each sub-loss reduction plan to obtain the equivalent total benefit; According to the equivalent total benefit and the benefits of each sub-loss reduction plan, obtain the total benefit change amount when each sub-loss reduction plan is implemented independently; According to the benefits of each sub-loss reduction plan, the benefit ratio of each sub-loss reduction plan and the total benefit change amount, obtain the contribution value of each measure to the total benefit, and conduct a contribution degree evaluation according to the size of the contribution value; The benefit ratio of the sub-loss reduction plan is the ratio of the corresponding benefit to the cost; The contribution value X of a certain measure i to the total benefit i is as follows: Among them, X i is the benefit of the sub-loss reduction plan corresponding to measure i, K i is the benefit ratio of the sub-loss reduction plan corresponding to measure i, n is the total number of measures, and ΔX ∑ is the total benefit change amount.

2. The evaluation method for the contribution degree of the comprehensive power distribution network loss reduction configuration strategy according to claim 1, characterized in that: The equivalent total benefit is: the product of the sum of the costs of each sub-loss reduction plan and the benefit ratio of the comprehensive loss reduction plan.

3. The evaluation method for the contribution degree of the comprehensive power distribution network loss reduction configuration strategy according to claim 1, characterized in that: The total benefit change amount is: the difference between the equivalent total benefit and the total benefit of each sub-loss reduction plan.

4. The evaluation method for the contribution degree of the comprehensive power distribution network loss reduction configuration strategy according to claim 1, characterized in that: Sort the contribution values of each loss reduction measure to the total benefit in descending order. The greater the contribution value of the loss reduction measure, the greater the contribution degree to the total benefit.

5. A contribution degree evaluation system for a comprehensive power distribution network loss reduction configuration strategy, characterized in that: It includes: A data acquisition module configured to: obtain the measure data adopted by the comprehensive power distribution network loss reduction plan; A measure decomposition module configured to: each measure data corresponds to a sub-loss reduction plan; An equivalent total benefit calculation module configured to: convert the total input cost of the comprehensive loss reduction plan into the sum of the costs of each sub-loss reduction plan to obtain the equivalent total benefit; A total benefit change amount calculation module configured to: according to the equivalent total benefit and the benefits of each sub-loss reduction plan, obtain the total benefit change amount when each sub-loss reduction plan is implemented independently; A contribution degree evaluation module configured to: according to the benefits of each sub-loss reduction plan, the benefit ratio of each sub-loss reduction plan and the total benefit change amount, obtain the contribution value of each measure to the total benefit, and conduct a contribution degree evaluation according to the size of the contribution value; The benefit ratio of the sub-loss reduction plan is the ratio of the corresponding benefit to the cost; The contribution value X of a certain measure i to the total benefit i is as follows: Among them, X i is the benefit of the sub-loss reduction plan corresponding to measure i, K i is the benefit ratio of the sub-loss reduction plan corresponding to measure i, n is the total number of measures, and ΔX ∑ is the total benefit change amount.

6. The contribution degree evaluation system for the comprehensive power distribution network loss reduction configuration strategy according to claim 5, characterized in that: The equivalent total benefit is: the product of the sum of the costs of each sub-loss reduction plan and the benefit ratio of the comprehensive loss reduction plan.

7. The contribution degree evaluation system for the comprehensive power distribution network loss reduction configuration strategy according to claim 5, characterized in that: The total benefit change amount is: the difference between the equivalent total benefit and the total benefit of each sub-loss reduction plan.

8. The contribution degree evaluation system for the comprehensive power distribution network loss reduction configuration strategy according to claim 5, characterized in that: Sort the contribution values of each loss reduction measure to the total benefit in descending order. The greater the contribution value of the loss reduction measure, the greater the contribution degree to the total benefit.

9. A computer-readable storage medium having a program stored thereon, characterized in that, When the program is executed by a processor, it implements the steps in the method for evaluating the contribution degree of the comprehensive loss reduction configuration strategy of the distribution network as described in any one of claims 1-4.

10. An electronic device, comprising a memory, a processor, and a program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps in the method for evaluating the contribution degree of the comprehensive loss reduction configuration strategy of the distribution network as described in any one of claims 1-4.

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