CN-121981590-A - New energy-energy storage planning scheme evaluation method and device for power distribution network and storage medium

CN121981590ACN 121981590 ACN121981590 ACN 121981590ACN-121981590-A

Abstract

The invention belongs to the technical field of power distribution network scheme planning, and particularly relates to a power distribution network new energy-energy storage planning scheme evaluation method, a device and a storage medium. The method comprises the steps of firstly constructing a three-layer evaluation index system, obtaining weights of indexes based on the three-layer evaluation index system by adopting a hierarchical analysis method, then obtaining index values of the various schemes under a plurality of different scenes according to a plurality of groups of schemes to be evaluated to obtain an index value matrix with the same number as the scenes, obtaining the quality of each scheme under the various scenes based on a fuzzy synthesis method according to weight vectors of the various indexes and the index value matrix, and finally carrying out weighted summation on the quality of a certain scheme under the various scenes by taking the occurrence probability of each scene as the weight to obtain the comprehensive quality of the certain scheme. The invention not only maintains the advantages of quantitative analysis of AHP and fuzzy comprehensive evaluation in the system, but also enhances the robustness and practicality of the evaluation result through probabilistic scene integration, thereby providing more scientific basis for planning decisions of the power distribution network.

Inventors

Lou Sijing
WANG JIANWEI
XU JUN
ZHANG PENGYUAN
WU BINGXIN
LIU ZHIWEN
CHEN YUXI
LI YAHUI
FU MEIPING
YUAN JUNJUN

Assignees

河南新型配网科学技术研究有限公司
许继电气股份有限公司
许昌许继软件技术有限公司

Dates

Publication Date: 20260505
Application Date: 20251215

Claims (10)

1. The new energy-energy storage planning scheme evaluation method for the power distribution network is characterized by comprising the following steps of: 1) The method comprises the steps of taking a target of a new energy-energy storage planning scheme of a power distribution network as a target layer, taking target characteristics of power system construction as a criterion layer, taking indexes influencing planning effects as index layers, and constructing a three-layer evaluation index system; 2) Obtaining index values of each scheme under a plurality of different scenes according to a plurality of groups of schemes to be evaluated, and obtaining an index value matrix with the same number as the scenes; 3) And carrying out the following treatment on the quality of each scheme to obtain the comprehensive quality of each scheme, wherein the occurrence probability of each scene is used as a weight to carry out weighted summation on the quality of a certain scheme under each scene so as to obtain the comprehensive quality of the certain scheme.
2. The method for evaluating a new energy-energy storage planning scheme of a power distribution network according to claim 1, wherein the different scenes are different typical scenes constructed by considering load level, new energy resource level, season and holiday establishment.
3. The method for evaluating new energy-energy storage planning schemes of power distribution networks according to claim 2, wherein the probability of each scene is calculated according to historical scene data and the scene is disassembled into two independent events of model year and season festival holiday, wherein the model year is obtained according to load level and new energy resource level, and the specific calculation mode is as follows: ; ; In the scene Is of model year And holidays of season festival Is a combination of (a); 、 And Respectively, scenes Model year And holidays of season festival Probability of (2); And Respectively, model years in historical data The number of occurrences and total years; When (when) When it is holiday: ; When (when) The working time is as follows: ; In the formula, 、 And Respectively, season, festival and holiday Holiday days, weekend days, and total days were legal during the season.
4. The method for evaluating a new energy-energy storage planning scheme of a power distribution network according to claim 1, wherein the scale method adopted when the analytic hierarchy process is adopted is an index scale method, and the index scale method is equal to the extremely important assignment of 1-9 scale methods.
5. The method for evaluating new energy-energy storage planning schemes of a power distribution network according to claim 1, wherein the process of obtaining the quality of each scheme in a certain scene based on the fuzzy synthesis method comprises the following steps: normalizing an index value matrix in m multiplied by n dimensions under a certain scene to obtain a standardized index value matrix, wherein m represents the index number and n represents the scheme number; Selecting the maximum value and the minimum value of each row from the standardized index value matrix to respectively form an optimal vector and a worst vector; Combining the weights of the indexes, and respectively calculating the weighted distances of the n schemes to the optimal vector and the worst vector; And according to the fuzzy mathematical theory, the weighted generalized distance square sum of each scheme to the optimal scheme and the worst scheme is minimized, so that the quantized value of the quality degree of each scheme, namely the quality degree of each scheme in a certain scene, is obtained.
6. The method for evaluating a new energy-energy storage planning scheme for a power distribution network according to claim 5, wherein the calculation formula of the weighted distance is as follows: ; ; Wherein b ik is a normalized index value of the kth index of the ith scheme, e k and l k are respectively the optimal and the worst values of the kth index, s e,i and s l,i respectively represent the weighted distances of the ith scheme to the optimal vector and the worst vector; the weight of the kth index, p denotes the minkowski distance parameter and p=2 for the euclidean distance.
7. The evaluation method of new energy-energy storage planning schemes of power distribution network according to claim 1, wherein the index values of each scheme in a plurality of different scenes are obtained through a simulation operation mode, and the calculation formulas of the output of photovoltaic and fans in the simulation operation process are as follows: ; ; ; In the formula, And The power generated by the fan and the photovoltaic at the period t respectively; And Rated power of a fan and rated power of photovoltaic are respectively; The average wind speed is t time period zone; 、 And Is a fixed parameter set by the wind turbine, namely cut-in, cut-out and rated wind speed respectively; Mean radiation intensity for the period t of the region; 、、 And The fixed parameters of the photovoltaic power generation are respectively the solar radiation intensity, the temperature, the rated working temperature of the photovoltaic cell and the temperature-power conversion coefficient under the standard test condition; the temperature of the solar panel is t time period; The average air temperature in the t-period region is represented.
8. The method for evaluating a new energy-energy storage planning scheme of a power distribution network according to claim 1, wherein the target features of the criterion layer comprise clean low carbon, safe and abundant, economical and efficient, supply and demand cooperation and flexible and intelligent, and the indexes of the index layer comprise new energy permeability, new energy electric quantity annual ratio, construction/transformation cost, new energy and energy storage equipment life-span electric cost, line loss rate, key user power supply guarantee rate, regional source load trend matching degree, new energy discarding rate and power distribution network regulation capability.
9. A new energy-energy storage planning scheme evaluation device for a power distribution network, comprising a processor, characterized in that the processor is configured to execute a computer program to implement the steps of the method according to any one of claims 1-8.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 8.

Description

New energy-energy storage planning scheme evaluation method and device for power distribution network and storage medium Technical Field The invention belongs to the technical field of power distribution network scheme planning, and particularly relates to a power distribution network new energy-energy storage planning scheme evaluation method, a device and a storage medium. Background The scientific evaluation of the new energy-energy storage planning scheme of the power distribution network has important significance for the planning decision of the novel power distribution network, is a key link for ensuring the safe, economic and reliable operation of the power distribution network, is beneficial to comprehensively considering multidimensional information in various candidate schemes, rapidly and objectively discriminates the advantages and disadvantages, reduces the running risk of the power distribution network, improves the transparency of the decision, and provides a dependable reference for subsequent design, construction and operation and maintenance. The scheme evaluation method commonly used at the present stage mainly comprises objective weighting methods such as multi-index weighted scoring based on an Analytic Hierarchy Process (AHP), entropy weighting method or gray correlation analysis, and multi-criterion decision methods such as fuzzy comprehensive evaluation, TOPSIS, and the like, and the methods can consider factors such as economy, reliability, flexibility, environmental benefit, and the like to a certain extent. However, the traditional AHP adopts 1-9 scale, the resolution and the scale uniformity are insufficient, the subjective judgment deviation is easy to amplify, the subjectivity can be reduced by an objective weighting method, expert experience is difficult to fully utilize, the qualitative index is easy to be limited by hard scoring in the numerical process, the uncertainty and the ambiguity cannot be effectively expressed, and the stability and the interpretability of an evaluation result are insufficient. For example, the Chinese patent application publication number CN113033886A and application publication date 2021.03.18 discloses a power distribution network planning construction evaluation method, which comprises the steps of firstly decomposing an evaluation direction into an index system comprising a plurality of indexes according to a power distribution network construction scheme, then endowing each index with static subjective weight based on a fuzzy analytic hierarchy process, endowing each index with dynamic objective weight based on a CRITIC weighting process, and finally evaluating the power distribution network construction scheme by adopting an optimal variable weight process. According to the fuzzy judgment matrix, the indexes are subjected to fuzzification processing through the difference value of the row-column sum, so that the intermediate links of fuzzy judgment are reduced. However, as high proportions of renewable energy sources are accessed and the diverse loads are increased, distribution network operation faces significant uncertainty challenges. The output of the photovoltaic power supply, the fan power supply and other distributed power supplies has strong randomness and fluctuation, and the load demand also presents complex time-space change characteristics, so that the evaluation result in a single scene is difficult to comprehensively reflect the actual adaptability of the planning scheme. Disclosure of Invention The invention aims to provide a new energy-energy storage planning scheme evaluation method, device and storage medium for a power distribution network, which are used for solving the technical problem that the evaluation result in a single scene is difficult to reflect the actual adaptability of the planning scheme. In order to solve the technical problems, the invention provides a technical scheme of a new energy-energy storage planning scheme evaluation method for a power distribution network, which comprises the following steps: the invention relates to a new energy-energy storage planning scheme evaluation method for a power distribution network, which comprises the following steps: 1) The method comprises the steps of taking a target of a new energy-energy storage planning scheme of a power distribution network as a target layer, taking target characteristics of power system construction as a criterion layer, taking indexes influencing planning effects as index layers, and constructing a three-layer evaluation index system; 2) Obtaining index values of each scheme under a plurality of different scenes according to a plurality of groups of schemes to be evaluated, and obtaining an index value matrix with the same number as the scenes; 3) And carrying out the following treatment on the quality of each scheme to obtain the comprehensive quality of each scheme, wherein the occurrence probability of each scene is used as a weight to ca