CN104036434A - Evaluation method for load supply capacity of power distribution network - Google Patents

Abstract

Translated fromChinese

本发明公开了一种配电网负荷供应能力评价方法，包括以下步骤：A：对影响配电网效果类指标的因素进行分析，分别确定对配电网供电可靠率、配电网综合电压合格率、配电网综合线损率和配电网综合设备利用率这四个配电网效果类指标影响最大的指标；B：分别确定步骤A中各个指标的计算公式；C：利用三角模糊层次分析法，经过数学计算分别求取步骤A中指标体系的各个指标权重；D：通过步骤C的求解，分别得到各个指标权重。本发明通过对配电网负荷供应能力进行科学准确地评估，丰富配电网综合指标体系的建立，有利于我国配电网安全稳定地运行。

The invention discloses a distribution network load supply capacity evaluation method, comprising the following steps: A: analyzing the factors affecting distribution network effect indicators, respectively determining the distribution network power supply reliability rate and distribution network comprehensive voltage qualified rate, distribution network comprehensive line loss rate and distribution network comprehensive equipment utilization, which are the four distribution network effect indicators that have the greatest influence; B: determine the calculation formulas of each index in step A respectively; C: use the triangular fuzzy hierarchy Analytical method, through mathematical calculation to obtain the weights of each index of the index system in step A; D: through the solution of step C, the weights of each index are obtained respectively. The invention scientifically and accurately evaluates the load supply capacity of the distribution network, enriches the establishment of the comprehensive index system of the distribution network, and is beneficial to the safe and stable operation of the distribution network in my country.

Description

Translated fromChinese

一种配电网负荷供应能力评价方法A method for evaluating load supply capacity of distribution network

技术领域technical field

本发明涉及配电系统领域，尤其涉及一种配电网负荷供应能力评价方法。The invention relates to the field of power distribution systems, in particular to a method for evaluating the load supply capacity of a distribution network.

背景技术Background technique

近年来，全球范围内掀起了智能电网的研究和建设热潮。围绕国家电网公司提出的“建设坚强智能电网”战略目标，我国各地开展了大量智能电网试点工程建设，其中较为成熟的试点项目包括智能变电站、配电自动化和用电信息采集系统等。In recent years, there has been an upsurge in the research and construction of smart grids worldwide. Focusing on the strategic goal of "building a strong smart grid" proposed by the State Grid Corporation of China, a large number of smart grid pilot projects have been carried out in various parts of my country. The more mature pilot projects include smart substations, power distribution automation, and power information collection systems.

作为电网的重要组成部分，配电网的智能化已成为未来电网发展的新趋势，对于实现智能电网建设的整体目标有着举足轻重的作用。因此，实现对智能配电网的评价，有着十分重要的意义。而目前尚未有科学的配电网负荷供应能力评价方法。As an important part of the power grid, the intelligence of the distribution network has become a new trend in the development of the future power grid, and it plays a decisive role in realizing the overall goal of smart grid construction. Therefore, it is of great significance to realize the evaluation of intelligent distribution network. At present, there is no scientific evaluation method for load supply capacity of distribution network.

发明内容Contents of the invention

本发明的目的是提供一种配电网负荷供应能力评价方法，能够通过对配电网负荷供应能力进行科学准确地评估，丰富配电网综合指标体系的建立，有利于我国配电网安全稳定地运行。The purpose of the present invention is to provide a distribution network load supply capacity evaluation method, which can scientifically and accurately evaluate the distribution network load supply capacity, enrich the establishment of a distribution network comprehensive index system, and is conducive to the safety and stability of my country's distribution network to run.

本发明采用下述技术方案：The present invention adopts following technical scheme:

一种配电网负荷供应能力评价方法，包括以下步骤：A method for evaluating the load supply capacity of a distribution network, comprising the following steps:

A：对影响配电网效果类指标的因素进行分析，分别确定对配电网供电可靠率、配电网综合电压合格率、配电网综合线损率和配电网综合设备利用率这四个配电网效果类指标影响最大的指标；A: Analyze the factors that affect the distribution network effect indicators, and determine the four factors of distribution network power supply reliability rate, distribution network comprehensive voltage qualification rate, distribution network comprehensive line loss rate and distribution network comprehensive equipment utilization rate. The most influential index of distribution network effect index;

其中，对配电网供电可靠率影响最大的指标为主变“N-1”校验通过率、66千伏线路“N-1”校验通过率和中压线路“N-1”通过率；对配电网综合电压合格率影响最大的指标为主变重载率、线路重载率、变电容载比和中压线路负载率；对配电网综合线损率影响最大的指标为主变重载率、线路重载率、变电容载比、中压线路负载率；对配电网设备利用率影响最大的指标为变电容载比、中压线路负载率、主变重载率和线路重载率；Among them, the indicators that have the greatest impact on the power supply reliability of the distribution network are the "N-1" verification pass rate of the main transformer, the "N-1" verification pass rate of the 66 kV line, and the "N-1" pass rate of the medium voltage line. ; The indicators that have the greatest impact on the comprehensive voltage qualification rate of the distribution network are mainly transformer heavy load rate, line heavy load rate, variable capacity load ratio and medium voltage line load rate; the indicators that have the greatest impact on the comprehensive line loss rate of distribution network are mainly Variable heavy load ratio, line heavy load ratio, variable capacitance load ratio, medium voltage line load ratio; indicators that have the greatest impact on distribution network equipment utilization are variable capacitance load ratio, medium voltage line load ratio, main transformer heavy load ratio and Line overload rate;

B：分别确定步骤A中各个指标的计算公式；B: Determine the calculation formulas of each index in step A respectively;

其中，主变“N-1”校验通过率指在最大负荷运行方式下，任意一台主变停运后，其全部负荷可转移到本站其它主变供电的变电站所占比例，用以反映变电站实际的负荷转供能力，主变“N-1”校验通过率的计算公式为Among them, the main transformer "N-1" verification pass rate refers to the proportion of substations whose full load can be transferred to other main transformers in the station after any one main transformer is out of service under the maximum load operation mode, which is used for Reflecting the actual load transfer capacity of the substation, the calculation formula for the pass rate of the main transformer "N-1" verification is

中压线路“N-1”校验通过率指在最大负荷运行方式下，在变电站出线开关停运后，能够将线路全部负荷通过不超过两次操作就转移到其它线路供电的线路所占比例，用以反映最大负荷运行方式下中压线路负荷转供能力，中压线路“N-1”校验通过率的计算公式为The "N-1" verification pass rate of medium-voltage lines refers to the proportion of lines that can transfer the full load of the line to other lines for power supply after no more than two operations after the outage switch of the substation is shut down under the maximum load operation mode , which is used to reflect the load transfer capacity of the medium-voltage line under the maximum load operation mode. The calculation formula for the "N-1" verification pass rate of the medium-voltage line is

66千伏线路“N-1”校验通过率指在最大负荷运行方式下，在变电站出线开关停运后，能够将线路全部负荷通过不超过两次操作就转移到其它线路供电的线路所占比例，用以反映最大负荷运行方式下66千伏线路负荷转供能力，66千伏线路“N-1”校验通过率的计算公式为The "N-1" verification pass rate of the 66 kV line refers to the proportion of lines that can transfer the full load of the line to other lines for power supply after no more than two operations after the outage switch of the substation is shut down under the maximum load operation mode. The ratio is used to reflect the load transfer capacity of the 66 kV line under the maximum load operation mode. The calculation formula for the "N-1" verification pass rate of the 66 kV line is:

主变重载率指重载主变所占的比例，重载主变是指其负载率超过70％的高压主变，用以反映主变非正常运行的严重程度，主变重载率的计算公式为The main transformer overload rate refers to the proportion of the heavy load main transformer. The heavy load main transformer refers to the high voltage main transformer whose load rate exceeds 70%, which is used to reflect the severity of the abnormal operation of the main transformer. The main transformer overload rate The calculation formula is

线路重载率指重载线路所占的比例，重载线路是指高中压线路及66千伏线路中负载率超过70％的线路，用以反映线路非正常运行的严重程度，线路重载率的计算公式为Line overload ratio refers to the proportion of heavy-duty lines. Heavy-duty lines refer to lines with a load rate of more than 70% among medium-voltage lines and 66 kV lines. It is used to reflect the severity of abnormal operation of lines. The calculation formula is

变电容载比指变电容量与最大负荷的比值，用以反映变电容量的利用率和充裕度，变电容载比的计算公式为The load ratio of variable capacitance refers to the ratio of variable capacitance to the maximum load, which is used to reflect the utilization rate and adequacy of variable capacitance. The calculation formula of variable capacitance-load ratio is

中压线路的负载率指中压线路所带的最大负荷与中压线路总容量的比例，用以反映中压线路的利用率和充裕度，中压线路负载率的计算公式为The load rate of the medium-voltage line refers to the ratio of the maximum load carried by the medium-voltage line to the total capacity of the medium-voltage line, which is used to reflect the utilization rate and adequacy of the medium-voltage line. The calculation formula for the load rate of the medium-voltage line is

C：利用三角模糊层次分析法，经过数学计算分别求取步骤A中指标体系的各个指标权重，利用三角模糊层次分析法求取权重的实现步骤如下：C: Use the triangular fuzzy analytic hierarchy process to obtain the weights of each index in the index system in step A through mathematical calculations. The implementation steps of using the triangular fuzzy analytic hierarchy process to obtain the weights are as follows:

C1：首先建立层次递阶结构；C1: First establish a hierarchical structure;

根据决策因素重要性的不同建立层次结构，将最终的目标确定为最高层，在最高层下面是各个影响因素，然后是影响子因素层，最后是由各种方案构成的最低层；Establish a hierarchical structure according to the importance of decision-making factors, determine the final goal as the highest level, below the highest level are various influencing factors, then the influencing sub-factor level, and finally the lowest level composed of various schemes;

C2：构造三角模糊判断矩阵；C2: Construct a triangular fuzzy judgment matrix;

对第k-1层的某一因素，在对与之相关的第k层全部n_k个因素进行两两比较时，采用三角模糊数定量表示，即模糊判断矩阵中的元素α_ij＝(l_ij,m_ij,u_ij)是一个以m_ij为中值的闭区间，其中，i、j为第k层第i个因素与第j个因素，l_ij、U_ij为依次为a_ij取值的下限和上限。m_ij的取值采用传统AHP法中比较判断所采用的1-9中的整数，其意义为：For a factor in the k-1th layer, when comparing all the n_k factors related to it in the k-th layer, it is quantitatively represented by triangular fuzzy numbers, that is, the fuzzy judgment matrix The element α_ij =(l_ij ,m_ij ,u_ij ) in is a closed interval with m_ij as the median, where i, j are the i-th factor and the j-th factor of the k-th layer, l_ij , U_ij is the lower limit and upper limit of the values of a_ij in turn. The value of m_ij adopts the integer of 1-9 used in the comparison and judgment in the traditional AHP method, and its meaning is:

标度值scale value标度意义scale meaning11前者与后者同样重要The former is as important as the latter33前者比后者稍微重要The former is slightly more important than the latter55前者比后者相当重要The former is more important than the latter77前者比后者强烈重要The former is strongly more important than the latter

99前者比后者极端重要The former is more important than the latter2、4、6、82, 4, 6, 8表示上述相邻判断的中间值Represents the intermediate value of the above adjacent judgments

C3：计算综合模糊程度值；C3: Calculate the comprehensive fuzzy degree value;

根据公式：求得第k层的综合三角模糊数判断矩阵，其中，i,j＝1,2,…,n_k,t＝1,2,…,T，表示第t个专家对第k层第i个因素与第j个因素比较而给出的模糊数；是$a_{\mathrm{ij}}^t(t=\mathrm{1,2},...,T)$的平均值；According to the formula: Obtain the comprehensive triangular fuzzy number judgment matrix of the kth layer, where, i,j=1,2,...,n_k ,t=1,2,...,T, Indicates the fuzzy number given by the t-th expert comparing the i-th factor with the j-th factor in the k-th layer; yes$a_{\mathrm{ij}}^t(t=\mathrm{1,2},...,T)$ average of;

再根据公式：$S_i^k=\underset{j=1}{\overset{n}{\mathrm{\Σ}}}{M}_{\mathrm{ij}}^k\⊗{\left(\underset{i=1}{\overset{n_k}{\mathrm{\Σ}}}\underset{j=1}{\overset{n_k}{\mathrm{\Σ}}}{M}_{\mathrm{ij}}^k\right)}^{-1},$i＝1,2,…,n_k求得综合模糊程度值，为第k层第i个元素的综合模糊程度值；Then according to the formula:$S_i^k=\underset{j=1}{\overset{\mathrm{no}}{\mathrm{\Σ}}}{m}_{\mathrm{ij}}^k\⊗{\left(\underset{i=1}{\overset{{\mathrm{no}}_k}{\mathrm{\Σ}}}\underset{j=1}{\overset{{\mathrm{no}}_k}{\mathrm{\Σ}}}{m}_{\mathrm{ij}}^k\right)}^{-1},$ i=1,2,…,n_k to obtain the comprehensive fuzzy degree value, is the comprehensive fuzzy degree value of the i-th element in the k-th layer;

C4：计算层次权重C4: Calculate layer weights

首先利用公式进行计算，First use the formula Calculation,

得出i,j＝1,2,…,n_k,i≠j；其中，V表示的可能性程度；inferred i,j=1,2,...,n_k , i≠j; among them, V means degree of possibility of

i,j＝1,2,…,n_k,i≠j；其中，表示第k层上各因素对第k-1层上第h个因素的权重，表示第k层上第i个因素； i,j=1,2,...,n_k , i≠j; where, Indicates the weight of each factor on the kth layer to the hth factor on the k-1th layer, Indicates the i-th factor on the k-th layer;

然后对进行归一化，可得第k层上对k-1层上第h个因素的权重，即：then to After normalization, the weight of the hth factor on the k-1 layer on the kth layer can be obtained, namely:

${\mathrm{<span><span>P</span>P</span>}}_{\mathrm{<span><span>h</span>h</span>}}<span><span>=</span>=</span>{<span><span>(</span>(</span>{\mathrm{<span><span>P</span>P</span>}}_{\mathrm{<span><span>1</span>1</span>}\mathrm{<span><span>h</span>h</span>}}^{\mathrm{<span><span>k</span>k</span>}}<span><span>,</span>,</span>{\mathrm{<span><span>P</span>P</span>}}_{\mathrm{<span><span>2</span>2</span>}\mathrm{<span><span>h</span>h</span>}}^{\mathrm{<span><span>k</span>k</span>}}<span><span>,</span>,</span><span><span>.</span>.</span><span><span>.</span>.</span><span><span>.</span>.</span><span><span>,</span>,</span>{\mathrm{<span><span>P</span>P</span>}}_{\mathrm{<span><span>nh</span>no</span>}}^{\mathrm{<span><span>k</span>k</span>}}<span><span>)</span>)</span>}^{\mathrm{<span><span>T</span>T</span>}}<span><span>;</span>;</span>$

C5：合成总权重C5: total composite weight

在求出各个层次权重后，已知第k-1层对总目标的排序权重向量是：After calculating the weights of each level, it is known that the ranking weight vector of the k-1th layer to the total target is:

那么第k层上全体元素对总目标的合成排序W^k为： Then the synthetic ranking W^k of all elements on the k-th layer to the total target is:

i＝1,2,…n_k (10)，其中W^k为总权重； i=1,2,...n_k (10), where W^k is the total weight;

D：通过步骤C的求解，分别得到各个指标权重，如下表所示：D: Through the solution of step C, the weights of each index are obtained respectively, as shown in the following table:

E：进行配电网负荷供应能力评价，配电网负荷供应能力评价的具体步骤为：E: To evaluate the load supply capacity of the distribution network, the specific steps for the evaluation of the load supply capacity of the distribution network are:

E1：查阅行业标准，根据配电网理想状态下的标注值，将其转换为百分制数值，制定评分标准；E1: Check the industry standards, convert the marked value into a percentage value according to the ideal state of the distribution network, and formulate the scoring standard;

E2：通过收集待评价配电网的原始数据，根据步骤B中各个指标计算公式分别计算出对应的指标数值；E2: By collecting the original data of the distribution network to be evaluated, calculate the corresponding index values according to the calculation formulas of each index in step B;

E3：根据步骤E2中计算出的指标数值，通过查阅步骤1中制定的评分标准，对配电网负荷供应能力的各项指标进行评价；并利用步骤D中求解得出的各个指标权重，结合E2中计算出的指标数值，可得出负荷供应能力的加权值，即可对配电网负荷供应能力进行评价。E3: According to the index values calculated in step E2, evaluate the indicators of the load supply capacity of the distribution network by referring to the scoring standards established in step 1; and use the weights of each index obtained in step D, combined with The index value calculated in E2 can obtain the weighted value of the load supply capacity, which can be used to evaluate the load supply capacity of the distribution network.

本发明通对影响配电网效果类指标的因素进行分析，选取对配电网供电可靠率、配电网综合电压合格率、配电网综合线损率和配电网综合设备利用率这四个配电网效果类指标影响最大的指标作为分析对象，然后利用三角模糊层次分析法，经过数学计算分别求取上述指标体系的各个指标权重，最后通过计算得出的各项指标数值，通过查阅制定的评分标准，对配电网负荷供应能力的各项指标进行评价；并结合各个指标权重，对配电网负荷供应能力进行评价。本发明通过对配电网负荷供应能力进行科学准确地评估，丰富配电网综合指标体系的建立，有利于我国配电网安全稳定地运行。The present invention analyzes the factors that affect the effect indicators of the distribution network, and selects four factors, namely, the power supply reliability rate of the distribution network, the comprehensive voltage qualification rate of the distribution network, the comprehensive line loss rate of the distribution network, and the comprehensive equipment utilization rate of the distribution network. The index with the greatest influence on the distribution network effect index is taken as the analysis object, and then the triangular fuzzy analytic hierarchy process is used to obtain the weights of each index of the above index system through mathematical calculations, and finally the calculated values of each index are obtained by consulting The established scoring standards evaluate the various indicators of the distribution network load supply capacity; and combine the weight of each index to evaluate the distribution network load supply capacity. The invention scientifically and accurately evaluates the load supply capacity of the distribution network, enriches the establishment of the comprehensive index system of the distribution network, and is beneficial to the safe and stable operation of the distribution network in my country.

附图说明Description of drawings

图1为本发明的流程示意图。Fig. 1 is a schematic flow chart of the present invention.

具体实施方式Detailed ways

如图1所述，本发明所述的配电网负荷供应能力评价方法，包括以下步骤：As shown in Figure 1, the distribution network load supply capacity evaluation method of the present invention includes the following steps:

A：对影响配电网效果类指标的因素进行分析，分别确定对配电网供电可靠率、配电网综合电压合格率、配电网综合线损率和配电网综合设备利用率这四个配电网效果类指标影响最大的指标；A: Analyze the factors that affect the distribution network effect indicators, and determine the four factors of distribution network power supply reliability rate, distribution network comprehensive voltage qualification rate, distribution network comprehensive line loss rate and distribution network comprehensive equipment utilization rate. The most influential index of distribution network effect index;

其中，对配电网供电可靠率影响最大的指标为主变“N-1”校验通过率、66千伏线路“N-1”校验通过率和中压线路“N-1”通过率；如表1所示：Among them, the indicators that have the greatest impact on the power supply reliability of the distribution network are the "N-1" verification pass rate of the main transformer, the "N-1" verification pass rate of the 66 kV line, and the "N-1" pass rate of the medium voltage line. ;As shown in Table 1:

表1Table 1

对配电网综合电压合格率影响最大的指标为主变重载率、线路重载率、变电容载比和中压线路负载率；如表2所示：The indicators that have the greatest impact on the comprehensive voltage qualification rate of the distribution network are the main transformer overload ratio, line overload ratio, transformer capacitance-load ratio and medium-voltage line load ratio; as shown in Table 2:

表2Table 2

对配电网综合线损率影响最大的指标为主变重载率、线路重载率、变电容载比、中压线路负载率；如表3所示：The indicators that have the greatest impact on the comprehensive line loss rate of the distribution network are the main transformer overload ratio, line overload ratio, transformer capacitance-load ratio, and medium-voltage line load ratio; as shown in Table 3:

表3table 3

对配电网设备利用率影响最大的指标为变电容载比、中压线路负载率、主变重载率和线路重载率；如表4所示：The indicators that have the greatest impact on the utilization of distribution network equipment are the transformer capacity load ratio, medium voltage line load rate, main transformer heavy load rate and line heavy load rate; as shown in Table 4:

表4Table 4

对上文所述各项指标对配电网效果类指标影响进行汇总，如表5所示：The impact of the above-mentioned indicators on the distribution network effect indicators is summarized, as shown in Table 5:

表5table 5

B：分别确定步骤A中各个指标的计算公式；B: Determine the calculation formulas of each index in step A respectively;

其中，主变“N-1”校验通过率指在最大负荷运行方式下，任意一台主变停运后，其全部负荷可转移到本站其它主变供电的变电站所占比例，用以反映变电站实际的负荷转供能力，主变“N-1”校验通过率的计算公式为Among them, the main transformer "N-1" verification pass rate refers to the proportion of substations whose full load can be transferred to other main transformers in the station after any one main transformer is out of service under the maximum load operation mode, which is used for Reflecting the actual load transfer capacity of the substation, the calculation formula for the pass rate of the main transformer "N-1" verification is

中压线路“N-1”校验通过率指在最大负荷运行方式下，在变电站出线开关停运后，能够将线路全部负荷通过不超过两次操作就转移到其它线路供电的线路所占比例，用以反映最大负荷运行方式下中压线路负荷转供能力，中压线路“N-1”校验通过率的计算公式为The "N-1" verification pass rate of medium-voltage lines refers to the proportion of lines that can transfer the full load of the line to other lines for power supply after no more than two operations after the outage switch of the substation is shut down under the maximum load operation mode , which is used to reflect the load transfer capacity of the medium-voltage line under the maximum load operation mode. The calculation formula for the "N-1" verification pass rate of the medium-voltage line is

66千伏线路“N-1”校验通过率指在最大负荷运行方式下，在变电站出线开关停运后，能够将线路全部负荷通过不超过两次操作就转移到其它线路供电的线路所占比例，用以反映最大负荷运行方式下66千伏线路负荷转供能力，66千伏线路“N-1”校验通过率的计算公式为The "N-1" verification pass rate of the 66 kV line refers to the proportion of lines that can transfer the full load of the line to other lines for power supply after no more than two operations after the outage switch of the substation is shut down under the maximum load operation mode. The ratio is used to reflect the load transfer capacity of the 66 kV line under the maximum load operation mode. The calculation formula for the "N-1" verification pass rate of the 66 kV line is:

主变重载率指重载主变所占的比例，重载主变是指其负载率超过70％的高压主变，用以反映主变非正常运行的严重程度，主变重载率的计算公式为The main transformer overload rate refers to the proportion of the heavy load main transformer. The heavy load main transformer refers to the high voltage main transformer whose load rate exceeds 70%, which is used to reflect the severity of the abnormal operation of the main transformer. The main transformer overload rate The calculation formula is

线路重载率指重载线路所占的比例，重载线路是指高中压线路及66千伏线路中负载率超过70％的线路，用以反映线路非正常运行的严重程度，线路重载率的计算公式为Line overload ratio refers to the proportion of heavy-duty lines. Heavy-duty lines refer to lines with a load rate of more than 70% among medium-voltage lines and 66 kV lines. It is used to reflect the severity of abnormal operation of lines. The calculation formula is

变电容载比指变电容量与最大负荷的比值，用以反映变电容量的利用率和充裕度，变电容载比的计算公式为The load ratio of variable capacitance refers to the ratio of variable capacitance to the maximum load, which is used to reflect the utilization rate and adequacy of variable capacitance. The calculation formula of variable capacitance-load ratio is

中压线路的负载率指中压线路所带的最大负荷与中压线路总容量的比例，用以反映中压线路的利用率和充裕度，中压线路负载率的计算公式为The load rate of the medium-voltage line refers to the ratio of the maximum load carried by the medium-voltage line to the total capacity of the medium-voltage line, which is used to reflect the utilization rate and adequacy of the medium-voltage line. The calculation formula for the load rate of the medium-voltage line is

C：利用三角模糊层次分析法，经过数学计算分别求取步骤A中指标体系的各个指标权重，三角模糊层次分析法属于本领域的现有技术，在此不再赘述，下面对本发明中三角模糊层次分析法求取权重的实现步骤进行阐述：C: Utilize the triangular fuzzy analytic hierarchy process to obtain the weights of each index of the index system in step A respectively through mathematical calculations. The triangular fuzzy analytic hierarchy process belongs to the prior art in this field, so it will not be repeated here. Next, the triangular fuzzy analytic hierarchy process in the present invention The implementation steps of the analytic hierarchy process to obtain the weight are described:

C1：首先建立层次递阶结构；根据决策因素重要性的不同建立层次结构，将最终的目标确定为最高层，在最高层下面是各个影响因素，然后是影响子因素层，最后是由各种方案构成的最低层。C1: First establish a hierarchical structure; establish a hierarchical structure according to the importance of decision-making factors, and determine the final goal as the highest level. The lowest level of program composition.

C2：构造三角模糊判断矩阵；C2: Construct a triangular fuzzy judgment matrix;

对第k-1层的某一因素，在对与之相关的第k层全部n_k个因素进行两两比较时，采用三角模糊数定量表示，即模糊判断矩阵中的元素α_ij＝(l_ij,m_ij,u_ij)是一个以m_ij为中值的闭区间，其中，i、j为第k层第i个因素与第j个因素，l_ij、U_ij为依次为a_ij取值的下限和上限。m_ij的取值采用传统AHP法中比较判断所采用的1-9中的整数，其意义如表6所示：For a factor in the k-1th layer, when comparing all the n_k factors related to it in the k-th layer, it is quantitatively represented by triangular fuzzy numbers, that is, the fuzzy judgment matrix The element α_ij =(l_ij ,m_ij ,u_ij ) in is a closed interval with m_ij as the median, where i, j are the i-th factor and the j-th factor of the k-th layer, l_ij , U_ij is the lower limit and upper limit of the values of a_ij in turn. The value of m_ij adopts the integers from 1 to 9 used in the comparison and judgment in the traditional AHP method, and its meaning is shown in Table 6:

标度值scale value标度意义scale meaning11前者与后者同样重要The former is as important as the latter33前者比后者稍微重要The former is slightly more important than the latter55前者比后者相当重要The former is more important than the latter77前者比后者强烈重要The former is strongly more important than the latter99前者比后者极端重要The former is more important than the latter2、4、6、82, 4, 6, 8表示上述相邻判断的中间值Represents the intermediate value of the above adjacent judgments

表6 比较判断矩阵的标度Table 6 Scale of comparative judgment matrix

C3：计算综合模糊程度值；C3: Calculate the comprehensive fuzzy degree value;

根据公式：According to the formula:

${\mathrm{<span><span>M</span>m</span>}}_{\mathrm{<span><span>ij</span>ij</span>}}^{\mathrm{<span><span>k</span>k</span>}}<span><span>=</span>=</span>\frac{\mathrm{<span><span>1</span>1</span>}}{\mathrm{<span><span>T</span>T</span>}}<span><span>(</span>(</span>{\mathrm{<span><span>\&alpha;</span>\&alpha;</span>}}_{\mathrm{<span><span>ij</span>ij</span>}}^{\mathrm{<span><span>1</span>1</span>}}<span><span>\&CirclePlus;</span>\&CirclePlus;</span>{\mathrm{<span><span>\&alpha;</span>\&alpha;</span>}}_{\mathrm{<span><span>ij</span>ij</span>}}^{\mathrm{<span><span>2</span>2</span>}}<span><span>\&CirclePlus;</span>\&CirclePlus;</span><span><span>.</span>.</span><span><span>.</span>.</span><span><span>.</span>.</span><span><span>\&CirclePlus;</span>\&CirclePlus;</span>{\mathrm{<span><span>\&alpha;</span>\&alpha;</span>}}_{\mathrm{<span><span>ij</span>ij</span>}}^{\mathrm{<span><span>T</span>T</span>}}<span><span>)</span>)</span>$

求得第k层的综合三角模糊数判断矩阵，其中，i,j＝1,2,…,n_k,t＝1,2,…,T，表示第t个专家对第k层第i个因素与第j个因素比较而给出的模糊数；是$a_{\mathrm{ij}}^t$$(t=\mathrm{1,2},...,T)$的平均值。Obtain the comprehensive triangular fuzzy number judgment matrix of the kth layer, where, i,j=1,2,...,n_k ,t=1,2,...,T, Indicates the fuzzy number given by the t-th expert comparing the i-th factor with the j-th factor in the k-th layer; yes$a_{\mathrm{ij}}^t$$(t=\mathrm{1,2},...,T)$ average of.

再根据公式：Then according to the formula:

${\mathrm{<span><span>S</span>S</span>}}_{\mathrm{<span><span>i</span>i</span>}}^{\mathrm{<span><span>k</span>k</span>}}<span><span>=</span>=</span>\underset{\mathrm{<span><span>j</span>j</span>}<span><span>=</span>=</span>\mathrm{<span><span>1</span>1</span>}}{\overset{\mathrm{<span><span>n</span>no</span>}}{\mathrm{<span><span>\&Sigma;</span>\&Sigma;</span>}}}{\mathrm{<span><span>M</span>m</span>}}_{\mathrm{<span><span>ij</span>ij</span>}}^{\mathrm{<span><span>k</span>k</span>}}<span><span>\&CircleTimes;</span>\&CircleTimes;</span>{<span><span>(</span>(</span>\underset{\mathrm{<span><span>i</span>i</span>}<span><span>=</span>=</span>\mathrm{<span><span>1</span>1</span>}}{\overset{{\mathrm{<span><span>n</span>no</span>}}_{\mathrm{<span><span>k</span>k</span>}}}{\mathrm{<span><span>\&Sigma;</span>\&Sigma;</span>}}}\underset{\mathrm{<span><span>j</span>j</span>}<span><span>=</span>=</span>\mathrm{<span><span>1</span>1</span>}}{\overset{{\mathrm{<span><span>n</span>no</span>}}_{\mathrm{<span><span>k</span>k</span>}}}{\mathrm{<span><span>\&Sigma;</span>\&Sigma;</span>}}}{\mathrm{<span><span>M</span>m</span>}}_{\mathrm{<span><span>ij</span>ij</span>}}^{\mathrm{<span><span>k</span>k</span>}}<span><span>)</span>)</span>}^{<span><span>-</span>-</span>\mathrm{<span><span>1</span>1</span>}}<span><span>,</span>,</span>\mathrm{<span><span>i</span>i</span>}<span><span>=</span>=</span>\mathrm{<span><span>1,2</span>1,2</span>}<span><span>,</span>,</span><span><span>.</span>.</span><span><span>.</span>.</span><span><span>.</span>.</span><span><span>,</span>,</span>{\mathrm{<span><span>n</span>no</span>}}_{\mathrm{<span><span>k</span>k</span>}}$

求得综合模糊程度值，为第k层第i个元素的综合模糊程度值。Calculate the comprehensive fuzzy degree value, is the comprehensive fuzziness value of the i-th element in the k-th layer.

C4：计算层次权重C4: Calculate layer weights

首先利用公式进行计算，First use the formula Calculation,

得出i,j＝1,2,…,n_k,i≠j；inferred i,j=1,2,...,n_k , i≠j;

其中，V表示的可能性程度。Among them, V means degree of possibility.

$P_{\mathrm{ih}}^k\left(A_i^k\right)=\min V(S_i^k\&GreaterEqual;S_j^k),$i,j＝1,2,…,n_k,i≠j；$P_{\mathrm{i\; h}}^k\left(A_i^k\right)=\min V(S_i^k\&Greater\; Equal;S_j^k),$ i,j=1,2,...,n_k , i≠j;

其中，表示第k层上各因素对第k-1层上第h个因素的权重，表示第k层上第i个因素。in, Indicates the weight of each factor on the kth layer to the hth factor on the k-1th layer, Indicates the i-th factor on the k-th layer.

然后对进行归一化，可得第k层上对k-1层上第h个因素的权重，即：then to After normalization, the weight of the hth factor on the k-1 layer on the kth layer can be obtained, namely:

${\mathrm{<span><span>P</span>P</span>}}_{\mathrm{<span><span>h</span>h</span>}}<span><span>=</span>=</span>{<span><span>(</span>(</span>{\mathrm{<span><span>P</span>P</span>}}_{\mathrm{<span><span>1</span>1</span>}\mathrm{<span><span>h</span>h</span>}}^{\mathrm{<span><span>k</span>k</span>}}<span><span>,</span>,</span>{\mathrm{<span><span>P</span>P</span>}}_{\mathrm{<span><span>2</span>2</span>}\mathrm{<span><span>h</span>h</span>}}^{\mathrm{<span><span>k</span>k</span>}}<span><span>,</span>,</span><span><span>.</span>.</span><span><span>.</span>.</span><span><span>.</span>.</span><span><span>,</span>,</span>{\mathrm{<span><span>P</span>P</span>}}_{\mathrm{<span><span>nh</span>no</span>}}^{\mathrm{<span><span>k</span>k</span>}}<span><span>)</span>)</span>}^{\mathrm{<span><span>T</span>T</span>}}$

C5：合成总权重C5: total composite weight

在求出各个层次权重后，已知第k-1层对总目标的排序权重向量是：After calculating the weights of each level, it is known that the ranking weight vector of the k-1th layer to the total target is:

那么第k层上全体元素对总目标的合成排序W^k为： Then the synthetic ranking W^k of all elements on the k-th layer to the total target is:

i＝1,2,…n_k，其中W^k为总权重； i=1,2,...n_k , where W^k is the total weight;

D：通过步骤C的求解，分别得到各个指标权重，如表7所示；D: Through the solution of step C, the weights of each index are obtained respectively, as shown in Table 7;

表7Table 7

E：进行配电网负荷供应能力评价；配电网负荷供应能力评价的具体步骤为：E: Carry out distribution network load supply capacity evaluation; the specific steps of distribution network load supply capacity evaluation are:

E1：查阅行业标准，根据配电网理想状态下指标的标注值，将其转换为百分制数值，制定评分标准；E1: Consult the industry standard, convert the marked value of the indicator under the ideal state of the distribution network into a percentage value, and formulate the scoring standard;

评分标准指通过一定的标度体系，将各种原始数据转换成的可直接比较的规范化格式；评分标度可采用百分制、十分制和五分制。本实施例中采用百分制，得分越高则说明性能越好。The scoring standard refers to the conversion of various raw data into a directly comparable standardized format through a certain scale system; the scoring scale can use a hundred-point system, a ten-point system, and a five-point system. In this embodiment, a percentage system is adopted, and the higher the score, the better the performance.

指标评分标准的制定主要参考指标的类型和理想值，指标类型分为正指标、负指标和中间值指标，正指标指该指标取值越高越好，负指标则是取值越低越好，而中间值指标是取值在中间的某个数值或区间最好。The formulation of index scoring standards mainly refers to the type and ideal value of the index. The index types are divided into positive index, negative index and intermediate value index. The positive index means that the higher the value of the index, the better, and the negative index means that the lower the value, the better , and the median index is best to take a certain value or interval in the middle.

在对配电网进行评价的过程中，需要确定指标数值的合理范围。当某参数位于这个合理范围之内时，表明从这个角度而言电网的参数或其表征的系统运行状态基本满足要求；反之则不然。指标的合理范围即指标的理想值。In the process of evaluating the distribution network, it is necessary to determine the reasonable range of the index value. When a certain parameter is within this reasonable range, it means that from this point of view, the parameters of the power grid or the system operation status represented by it basically meet the requirements; otherwise, it is not. The reasonable range of the index is the ideal value of the index.

通过查找配电网相关行业标准，制定出负荷供应能力评价体系指标类型和理想值(如表8所示)，以及负荷供应能力评价体系的评分标准(如表9所示)：By searching the relevant industry standards of the distribution network, the index types and ideal values of the load supply capacity evaluation system (as shown in Table 8) and the scoring standards of the load supply capacity evaluation system (as shown in Table 9) are formulated:

负荷供应能力评价体系指标类型和理想值Index Types and Ideal Values of Load Supply Capacity Evaluation System

表8Table 8

负荷供应能力评价体系的评分标准Scoring Standards of Load Supply Capacity Evaluation System

表9Table 9

E2：通过收集待评价配电网的原始数据，根据步骤B中各个指标计算公式分别计算出对应的指标数值；E2: By collecting the original data of the distribution network to be evaluated, calculate the corresponding index values according to the calculation formulas of each index in step B;

E3：根据步骤E2中计算出的指标数值，通过查阅步骤1中制定的评分标准，对配电网负荷供应能力的各项指标进行评价；并利用步骤D中求解得出的各个指标权重，结合E2中计算出的指标数值，可得出负荷供应能力的加权值，即可对配电网负荷供应能力进行评价。E3: According to the index values calculated in step E2, evaluate the indicators of the load supply capacity of the distribution network by referring to the scoring standards established in step 1; and use the weights of each index obtained in step D, combined with The index value calculated in E2 can obtain the weighted value of the load supply capacity, which can be used to evaluate the load supply capacity of the distribution network.

例如，利用该方法对某配电网进行负荷供应能力评价，原始数据和计算结果如表10所示。计算得出其中压线路“N-1”通过率指标值为44.97％(340/756)，查阅评分标准可知其评分为23.31，可见该配电网在中压线路“N-1”情况下的供电可靠性相对较差，不合格。同时通过各个指标评分乘以各自的权重值，然后再求和得该配电网负荷供应能力评分为38.75(14.17*0.12+11.06*0.12+38.75*0.17+51.83*0.17+44.97*0.17+2.10*0.13+41.93*0.12)，该评价得分较低，主要原因在于其主变“N-1”通过率，线路“N-1”通过率，中压线路“N-1”通过率以及中压线路负载率都较低，评价得分只有20左右，其次线路重载率和主变重载率得分在50-60之间，上升空间很大。For example, using this method to evaluate the load supply capacity of a distribution network, the original data and calculation results are shown in Table 10. It is calculated that the pass rate index value of the medium voltage line "N-1" is 44.97% (340/756). According to the scoring standard, the score is 23.31. It can be seen that the distribution network is under the condition of the medium voltage line "N-1". The power supply reliability is relatively poor and unqualified. At the same time, the scores of each index are multiplied by their respective weight values, and then summed to obtain the load supply capacity score of the distribution network as 38.75 (14.17*0.12+11.06*0.12+38.75*0.17+51.83*0.17+44.97*0.17+2.10* 0.13+41.93*0.12), the evaluation score is low, mainly due to its main transformer "N-1" pass rate, line "N-1" pass rate, medium voltage line "N-1" pass rate and medium voltage line The load rate is low, and the evaluation score is only about 20. Secondly, the line overload rate and the main transformer overload rate score are between 50-60, and there is a lot of room for improvement.

表10 负荷供应能力评价算例Table 10 Evaluation example of load supply capacity

Claims (1)

Translated fromChinese

1.一种配电网负荷供应能力评价方法，其特征在于，包括以下步骤：1. A distribution network load supply capacity evaluation method, is characterized in that, comprises the following steps:A：对影响配电网效果类指标的因素进行分析，分别确定对配电网供电可靠率、配电网综合电压合格率、配电网综合线损率和配电网综合设备利用率这四个配电网效果类指标影响最大的指标；A: Analyze the factors that affect the distribution network effect indicators, and determine the four factors of distribution network power supply reliability rate, distribution network comprehensive voltage qualification rate, distribution network comprehensive line loss rate and distribution network comprehensive equipment utilization rate. The most influential index of distribution network effect index;其中，对配电网供电可靠率影响最大的指标为主变“N-1”校验通过率、66千伏线路“N-1”校验通过率和中压线路“N-1”通过率；对配电网综合电压合格率影响最大的指标为主变重载率、线路重载率、变电容载比和中压线路负载率；对配电网综合线损率影响最大的指标为主变重载率、线路重载率、变电容载比、中压线路负载率；对配电网设备利用率影响最大的指标为变电容载比、中压线路负载率、主变重载率和线路重载率；Among them, the indicators that have the greatest impact on the power supply reliability of the distribution network are the "N-1" verification pass rate of the main transformer, the "N-1" verification pass rate of the 66 kV line, and the "N-1" pass rate of the medium voltage line. ; The indicators that have the greatest impact on the comprehensive voltage qualification rate of the distribution network are mainly transformer heavy load rate, line heavy load rate, variable capacity load ratio and medium voltage line load rate; the indicators that have the greatest impact on the comprehensive line loss rate of distribution network are mainly Variable heavy load ratio, line heavy load ratio, variable capacitance load ratio, medium voltage line load ratio; indicators that have the greatest impact on distribution network equipment utilization are variable capacitance load ratio, medium voltage line load ratio, main transformer heavy load ratio and Line overload rate;B：分别确定步骤A中各个指标的计算公式；B: Determine the calculation formulas of each index in step A respectively;其中，主变“N-1”校验通过率指在最大负荷运行方式下，任意一台主变停运后，其全部负荷可转移到本站其它主变供电的变电站所占比例，用以反映变电站实际的负荷转供能力，主变“N-1”校验通过率的计算公式为Among them, the main transformer "N-1" verification pass rate refers to the proportion of substations whose full load can be transferred to other main transformers in the station after any one main transformer is out of service under the maximum load operation mode, which is used for Reflecting the actual load transfer capacity of the substation, the calculation formula for the pass rate of the main transformer "N-1" verification is中压线路“N-1”校验通过率指在最大负荷运行方式下，在变电站出线开关停运后，能够将线路全部负荷通过不超过两次操作就转移到其它线路供电的线路所占比例，用以反映最大负荷运行方式下中压线路负荷转供能力，中压线路“N-1”校验通过率的计算公式为The "N-1" verification pass rate of medium-voltage lines refers to the proportion of lines that can transfer the full load of the line to other lines for power supply after no more than two operations after the outage switch of the substation is shut down under the maximum load operation mode , which is used to reflect the load transfer capacity of the medium-voltage line under the maximum load operation mode. The calculation formula for the "N-1" verification pass rate of the medium-voltage line is66千伏线路“N-1”校验通过率指在最大负荷运行方式下，在变电站出线开关停运后，能够将线路全部负荷通过不超过两次操作就转移到其它线路供电的线路所占比例，用以反映最大负荷运行方式下66千伏线路负荷转供能力，66千伏线路“N-1”校验通过率的计算公式为The "N-1" verification pass rate of the 66 kV line refers to the proportion of lines that can transfer the full load of the line to other lines for power supply after no more than two operations after the outage switch of the substation is shut down under the maximum load operation mode. The ratio is used to reflect the load transfer capacity of the 66 kV line under the maximum load operation mode. The calculation formula for the "N-1" verification pass rate of the 66 kV line is:主变重载率指重载主变所占的比例，重载主变是指其负载率超过70％的高压主变，用以反映主变非正常运行的严重程度，主变重载率的计算公式为The main transformer overload rate refers to the proportion of the heavy load main transformer. The heavy load main transformer refers to the high voltage main transformer whose load rate exceeds 70%, which is used to reflect the severity of the abnormal operation of the main transformer. The main transformer overload rate The calculation formula is线路重载率指重载线路所占的比例，重载线路是指高中压线路及66千伏线路中负载率超过70％的线路，用以反映线路非正常运行的严重程度，线路重载率的计算公式为Line overload ratio refers to the proportion of heavy-duty lines. Heavy-duty lines refer to lines with a load rate of more than 70% among medium-voltage lines and 66 kV lines. It is used to reflect the severity of abnormal operation of lines. The calculation formula is变电容载比指变电容量与最大负荷的比值，用以反映变电容量的利用率和充裕度，变电容载比的计算公式为The load ratio of variable capacitance refers to the ratio of variable capacitance to the maximum load, which is used to reflect the utilization rate and adequacy of variable capacitance. The calculation formula of variable capacitance-load ratio is中压线路的负载率指中压线路所带的最大负荷与中压线路总容量的比例，用以反映中压线路的利用率和充裕度，中压线路负载率的计算公式为The load rate of the medium-voltage line refers to the ratio of the maximum load carried by the medium-voltage line to the total capacity of the medium-voltage line, which is used to reflect the utilization rate and adequacy of the medium-voltage line. The calculation formula for the load rate of the medium-voltage line isC：利用三角模糊层次分析法，经过数学计算分别求取步骤A中指标体系的各个指标权重，利用三角模糊层次分析法求取权重的实现步骤如下：C: Use the triangular fuzzy analytic hierarchy process to obtain the weights of each index in the index system in step A through mathematical calculations. The implementation steps of using the triangular fuzzy analytic hierarchy process to obtain the weights are as follows:C1：首先建立层次递阶结构；C1: First establish a hierarchical structure;根据决策因素重要性的不同建立层次结构，将最终的目标确定为最高层，在最高层下面是各个影响因素，然后是影响子因素层，最后是由各种方案构成的最低层；Establish a hierarchical structure according to the importance of decision-making factors, determine the final goal as the highest level, below the highest level are various influencing factors, then the influencing sub-factor level, and finally the lowest level composed of various schemes;C2：构造三角模糊判断矩阵；C2: Construct a triangular fuzzy judgment matrix;对第k-1层的某一因素，在对与之相关的第k层全部n_k个因素进行两两比较时，采用三角模糊数定量表示，即模糊判断矩阵中的元素α_ij＝(l_ij,m_ij,u_ij)是一个以m_ij为中值的闭区间，其中，i、j为第k层第i个因素与第j个因素，l_ij、U_ij为依次为a_ij取值的下限和上限。m_ij的取值采用传统AHP法中比较判断所采用的1-9中的整数，其意义为：For a certain factor in the k-1th layer, when comparing all n_k factors related to it in the k-th layer, it is quantitatively represented by triangular fuzzy numbers, that is, the fuzzy judgment matrix The element α_ij =(l_ij ,m_ij ,u_ij ) in is a closed interval with m_ij as the median, where i, j are the i-th factor and the j-th factor of the k-th layer, l_ij , U_ij is the lower limit and upper limit of the values of a_ij in turn. The value of m_ij adopts the integer of 1-9 used in the comparison and judgment in the traditional AHP method, and its meaning is:标度值scale value标度意义scale meaning11前者与后者同样重要The former is as important as the latter33前者比后者稍微重要The former is slightly more important than the latter55前者比后者相当重要The former is more important than the latter77前者比后者强烈重要The former is strongly more important than the latter99前者比后者极端重要The former is more important than the latter2、4、6、82, 4, 6, 8表示上述相邻判断的中间值Represents the intermediate value of the above adjacent judgmentsC3：计算综合模糊程度值；C3: Calculate the comprehensive fuzzy degree value;根据公式：求得第k层的综合三角模糊数判断矩阵，其中，i,j＝1,2,…,n_k,t＝1,2,…,T，表示第t个专家对第k层第i个因素与第j个因素比较而给出的模糊数；是$a_{\mathrm{ij}}^t(t=\mathrm{1,2},...,T)$的平均值；According to the formula: Obtain the comprehensive triangular fuzzy number judgment matrix of the kth layer, where, i,j=1,2,...,n_k ,t=1,2,...,T, Indicates the fuzzy number given by the t-th expert comparing the i-th factor with the j-th factor in the k-th layer; yes$a_{\mathrm{ij}}^t(t=\mathrm{1,2},...,T)$ average of;再根据公式：$S_i^k=\underset{j=1}{\overset{n}{\mathrm{\&Sigma;}}}{M}_{\mathrm{ij}}^k\&CircleTimes;{\left(\underset{i=1}{\overset{n_k}{\mathrm{\&Sigma;}}}\underset{j=1}{\overset{n_k}{\mathrm{\&Sigma;}}}{M}_{\mathrm{ij}}^k\right)}^{-1},$i＝1,2,…,n_k求得综合模糊程度值，为第k层第i个元素的综合模糊程度值；Then according to the formula:$S_i^k=\underset{j=1}{\overset{\mathrm{no}}{\mathrm{\&Sigma;}}}{m}_{\mathrm{ij}}^k\&CircleTimes;{\left(\underset{i=1}{\overset{{\mathrm{no}}_k}{\mathrm{\&Sigma;}}}\underset{j=1}{\overset{{\mathrm{no}}_k}{\mathrm{\&Sigma;}}}{m}_{\mathrm{ij}}^k\right)}^{-1},$ i=1,2,…,n_k to obtain the comprehensive fuzzy degree value, is the comprehensive fuzziness value of the i-th element in the k-th layer;C4：计算层次权重C4: Calculate layer weights首先利用公式进行计算，First use the formula Calculation,得出i,j＝1,2,…,n_k,i≠j；其中，V表示的可能性程度；inferred i,j=1,2,...,n_k , i≠j; among them, V means degree of possibility ofi,j＝1,2,…,n_k,i≠j；其中，表示第k层上各因素对第k-1层上第h个因素的权重，表示第k层上第i个因素； i,j=1,2,...,n_k , i≠j; where, Indicates the weight of each factor on the kth layer to the hth factor on the k-1th layer, Indicates the i-th factor on the k-th layer;然后对进行归一化，可得第k层上对k-1层上第h个因素的权重，即：then to After normalization, the weight of the hth factor on the k-1 layer on the kth layer can be obtained, namely:${\mathrm{<span><span>P</span>P</span>}}_{\mathrm{<span><span>h</span>h</span>}}<span><span>=</span>=</span>{<span><span>(</span>(</span>{\mathrm{<span><span>P</span>P</span>}}_{\mathrm{<span><span>1</span>1</span>}\mathrm{<span><span>h</span>h</span>}}^{\mathrm{<span><span>k</span>k</span>}}<span><span>,</span>,</span>{\mathrm{<span><span>P</span>P</span>}}_{\mathrm{<span><span>2</span>2</span>}\mathrm{<span><span>h</span>h</span>}}^{\mathrm{<span><span>k</span>k</span>}}<span><span>,</span>,</span><span><span>.</span>.</span><span><span>.</span>.</span><span><span>.</span>.</span><span><span>,</span>,</span>{\mathrm{<span><span>P</span>P</span>}}_{\mathrm{<span><span>nh</span>no</span>}}^{\mathrm{<span><span>k</span>k</span>}}<span><span>)</span>)</span>}^{\mathrm{<span><span>T</span>T</span>}}<span><span>;</span>;</span>$C5：合成总权重C5: total composite weight在求出各个层次权重后，已知第k-1层对总目标的排序权重向量是：After calculating the weights of each level, it is known that the ranking weight vector of the k-1th layer to the total target is:那么第k层上全体元素对总目标的合成排序W^k为： Then the synthetic ranking W^k of all elements on the k-th layer to the total target is:i＝1,2,…n_k (10)，其中W^k为总权重； i=1,2,...n_k (10), where W^k is the total weight;D：通过步骤C的求解，分别得到各个指标权重，如下表所示：D: Through the solution of step C, the weights of each index are obtained respectively, as shown in the following table:E：进行配电网负荷供应能力评价，配电网负荷供应能力评价的具体步骤为：E: To evaluate the load supply capacity of the distribution network, the specific steps for the evaluation of the load supply capacity of the distribution network are:E1：查阅行业标准，根据配电网理想状态下的标注值，将其转换为百分制数值，制定评分标准；E1: Check the industry standards, convert the marked value into a percentage value according to the ideal state of the distribution network, and formulate the scoring standard;E2：通过收集待评价配电网的原始数据，根据步骤B中各个指标计算公式分别计算出对应的指标数值；E2: By collecting the original data of the distribution network to be evaluated, calculate the corresponding index values according to the calculation formulas of each index in step B;E3：根据步骤E2中计算出的指标数值，通过查阅步骤1中制定的评分标准，对配电网负荷供应能力的各项指标进行评价；并利用步骤D中求解得出的各个指标权重，结合E2中计算出的指标数值，可得出负荷供应能力的加权值，即可对配电网负荷供应能力进行评价。E3: According to the index values calculated in step E2, evaluate the indicators of the load supply capacity of the distribution network by referring to the scoring standards formulated in step 1; and use the weights of each index obtained in step D, combined with The index value calculated in E2 can obtain the weighted value of the load supply capacity, which can be used to evaluate the load supply capacity of the distribution network.