Multi-type reactive power configuration scheme evaluation method and device

Abstract

The invention provides a multi-type reactive power configuration scheme evaluation method and device, and the method comprises the steps: firstly, obtaining a reactive power priority configuration node set, a multi-type reactive power configuration scheme set and a reactive power equipment capacity set in a power system partition; then, through anticipated accident set simulation and dynamic voltage response analysis, an evaluation index set including voltage stability, a transient voltage recovery contribution rate, an adjustment range utilization rate, a device response speed and an investment cost index is constructed; then, the index values are processed through a range normalization method, and a normalized index set is generated; on the basis of the correlation coefficient matrix and the standard deviation variability, the weight of each index is determined in combination with a CRITIC method. And finally, generating a comprehensive score set of each scheme through weighted summation, and determining an optimal configuration scheme. According to the method, multi-type reactive power configuration schemes can be comprehensively evaluated, and reactive power equipment selection, power grid stability requirements and equipment investment can be balanced.

Description

Technical Field

[0001] The present application relates to the field of reactive power optimization, and in particular to a method and device for evaluating multiple types of reactive power configuration schemes. Background Art

[0002] Current reactive power configuration scheme evaluation methods often lack a comprehensive, systematic framework, making it difficult to comprehensively assess multiple reactive power configuration schemes. Traditional evaluation methods focus solely on a single performance indicator, such as voltage stability or device investment cost, while neglecting other equally important factors. Furthermore, the variability between different reactive power devices further complicates the evaluation process. Summary of the Invention

[0003] The purpose of this application is to overcome the above-mentioned defects in the prior art and provide a method and device for evaluating multiple types of reactive power configuration schemes.

[0004] This application provides a multi-type reactive power configuration scheme evaluation method, including:

[0005] Acquire a reactive power priority configuration node set within a power system partition, a set of multiple reactive power configuration schemes generated based on the reactive power priority configuration node set, and a set of reactive equipment capacities corresponding to different nodes in each scheme;

[0006] Based on the reactive power priority configuration node set, the multi-type reactive power configuration scheme set, and the reactive equipment capacity set, a set of evaluation indicators including a voltage stability index, a transient voltage recovery contribution rate index, a regulation range utilization index, a device response speed index, and a device investment cost index is constructed through a simulated accident set and a dynamic voltage response analysis;

[0007] Based on the voltage stability index value, transient voltage recovery contribution rate index value, regulation range utilization index value, device response speed index value and device investment cost index value of each scheme in the evaluation index set, the index values ​​are normalized by a range normalization method to generate a normalized index set;

[0008] Based on the normalized indicator set, by calculating the correlation coefficient matrix and standard deviation variability between the indicators, and combining the correlation coefficient matrix and the standard deviation variability with the CRITIC method, a weight set of the voltage stability indicator, the transient voltage recovery contribution rate indicator, the regulation range utilization index, the device response speed indicator, and the device investment cost indicator is determined;

[0009] Based on the normalized indicator values ​​in the normalized indicator set and the weight coefficients of each indicator in the weight set, a comprehensive score set of each type of reactive power configuration scheme is generated by weighted summation, and the optimal configuration scheme is determined according to the maximum value in the comprehensive score set.

[0010] Optionally, based on the reactive power priority configuration node set, the multi-type reactive power configuration scheme set, and the reactive power equipment capacity set, through simulation of a hypothetical accident set and dynamic voltage response analysis, a set of evaluation indicators including a voltage stability index, a transient voltage recovery contribution rate index, a regulation range utilization index, a device response speed index, and a device investment cost index is constructed, including:

[0011] Calculating the voltage stability index by integrating the voltage deviation according to the pre-fault steady-state voltage amplitude, transient voltage amplitude time series, and expected accident probability distribution of each node in the reactive priority configuration node set;

[0012] Based on the total planned capacity in the reactive equipment capacity set and the difference between the time when the zone bus fault occurs and the time when the voltage recovers to the preset threshold in each scheme, the transient voltage recovery contribution rate index is calculated by the time-capacity ratio;

[0013] Calculating the utilization index of the regulation range by using capacity utilization statistics based on the upper limit of the reactive regulation range planned in the reactive equipment capacity set and the actual input capacity dynamic curve under the expected accident scenario;

[0014] Obtaining the action delay parameters of the mechanical switches or power electronic devices of the shunt capacitors, synchronous condensers, and dynamic VAR compensation devices in each solution, and determining the response speed index of the devices;

[0015] The unit capacity cost and installation and maintenance costs corresponding to the reactive equipment type of each solution are obtained, and the device investment cost index is calculated by accumulating the costs.

[0016] Optionally, based on the normalized indicator set, by calculating the correlation coefficient matrix and standard deviation variability between the indicators, the CRITIC method is used to combine the correlation coefficient matrix and the standard deviation variability to determine the weight set of the voltage stability indicator, the transient voltage recovery contribution rate indicator, the regulation range utilization index, the device response speed index, and the device investment cost indicator, including:

[0017] The weight set is generated by calculating the Pearson correlation coefficient between each indicator in the correlation coefficient matrix and the standard deviation of each indicator in the standard deviation variability, combined with the conflict and information analysis of the CRITIC method.

[0018] Optionally, based on the normalized indicator values ​​in the normalized indicator set and the weight coefficients of the indicators in the weight set, generating a comprehensive score set of each type of reactive power configuration scheme by weighted summation, and determining the optimal configuration scheme according to the maximum value in the comprehensive score set, including:

[0019] The comprehensive score set is generated by linearly superimposing the index values ​​after the standardization process and the corresponding weight coefficients, and the optimal configuration scheme is determined according to the score ranking.

[0020] Optionally, obtaining a reactive power priority configuration node set within a power system partition, a set of multiple reactive power configuration schemes generated based on the reactive power priority configuration node set, and a set of reactive equipment capacities corresponding to different nodes in each scheme includes:

[0021] Obtaining short-circuit capacity data of each node in the power system partition, screening nodes whose short-circuit capacity is lower than a preset threshold, and generating a set of candidate nodes;

[0022] Based on the voltage sensitivity parameters of each node in the candidate node set, the top N high-sensitivity nodes are selected by descending sorting to generate the reactive power priority configuration node set.

[0023] The present application also provides a device for evaluating multiple types of reactive power configuration schemes, including:

[0024] An acquisition module is configured to acquire a reactive power priority configuration node set within a power system partition, a set of multiple reactive power configuration schemes generated based on the reactive power priority configuration node set, and a set of reactive equipment capacities corresponding to different nodes in each scheme;

[0025] An indicator module, based on the reactive power priority configuration node set, the multi-type reactive power configuration scheme set, and the reactive power equipment capacity set, constructs an evaluation indicator set including a voltage stability indicator, a transient voltage recovery contribution rate indicator, a regulation range utilization rate indicator, a device response speed indicator, and a device investment cost indicator through a simulated accident set and dynamic voltage response analysis;

[0026] a standard module, which standardizes the index values ​​by using a range normalization method based on the voltage stability index value, transient voltage recovery contribution rate index value, regulation range utilization index value, device response speed index value, and device investment cost index value of each scheme in the evaluation index set to generate a normalized index set;

[0027] a weighting module, based on the normalized indicator set, calculating a correlation coefficient matrix and a standard deviation variability among the indicators, and determining a weighting set of the voltage stability indicator, the transient voltage recovery contribution rate indicator, the regulation range utilization rate indicator, the device response speed indicator, and the device investment cost indicator by combining the correlation coefficient matrix and the standard deviation variability using a CRITIC method;

[0028] The analysis module generates a comprehensive score set of each type of reactive power configuration scheme by weighted summation based on the standardized indicator values ​​in the normalized indicator set and the weight coefficients of each indicator in the weight set, and determines the optimal configuration scheme according to the maximum value in the comprehensive score set.

[0029] Optionally, the indicator module constructs an evaluation indicator set including a voltage stability indicator, a transient voltage recovery contribution rate indicator, a regulation range utilization index, a device response speed indicator, and a device investment cost indicator based on the reactive power priority configuration node set, the multi-type reactive power configuration scheme set, and the reactive power device capacity set through a simulated accident set and dynamic voltage response analysis, including:

[0030] Calculating the voltage stability index by integrating the voltage deviation according to the pre-fault steady-state voltage amplitude, transient voltage amplitude time series, and expected accident probability distribution of each node in the reactive priority configuration node set;

[0031] Based on the total planned capacity in the reactive equipment capacity set and the difference between the time when the zone bus fault occurs and the time when the voltage recovers to the preset threshold in each scheme, the transient voltage recovery contribution rate index is calculated by the time-capacity ratio;

[0032] Calculating the utilization index of the regulation range by using capacity utilization statistics based on the upper limit of the reactive regulation range planned in the reactive equipment capacity set and the actual input capacity dynamic curve under the expected accident scenario;

[0033] Obtaining the action delay parameters of the mechanical switches or power electronic devices of the shunt capacitors, synchronous condensers, and dynamic VAR compensation devices in each solution, and determining the response speed index of the devices;

[0034] The unit capacity cost and installation and maintenance costs corresponding to the reactive equipment type of each solution are obtained, and the device investment cost index is calculated by accumulating the costs.

[0035] Optionally, the weight module determines a weight set of the voltage stability index, the transient voltage recovery contribution rate index, the regulation range utilization index, the device response speed index, and the device investment cost index based on the normalized index set by calculating a correlation coefficient matrix and standard deviation variability between the indicators and synthesizing the correlation coefficient matrix and the standard deviation variability using a CRITIC method, including:

[0036] The weight set is generated by calculating the Pearson correlation coefficient between each indicator in the correlation coefficient matrix and the standard deviation of each indicator in the standard deviation variability, combined with the conflict and information analysis of the CRITIC method.

[0037] Optionally, the weight module generates a comprehensive score set of each type of reactive power configuration scheme based on the normalized indicator value in the normalized indicator set and the weight coefficient of each indicator in the weight set by weighted summation, and determines the optimal configuration scheme according to the maximum value in the comprehensive score set, including:

[0038] The comprehensive score set is generated by linearly superimposing the index values ​​after the standardization process and the corresponding weight coefficients, and the optimal configuration scheme is determined according to the score ranking.

[0039] Optionally, the acquisition module acquires a reactive power priority configuration node set within a power system partition, a set of multiple reactive power configuration schemes generated based on the reactive power priority configuration node set, and a set of reactive equipment capacities corresponding to different nodes in each scheme, including:

[0040] Obtaining short-circuit capacity data of each node in the power system partition, screening nodes whose short-circuit capacity is lower than a preset threshold, and generating a set of candidate nodes;

[0041] Based on the voltage sensitivity parameters of each node in the candidate node set, the top N high-sensitivity nodes are selected by descending sorting to generate the reactive power priority configuration node set.

[0042] The beneficial effects of this application are:

[0043] The present application provides a method for evaluating multiple types of reactive configuration schemes, including: obtaining a reactive priority configuration node set within a power system partition, a multiple type reactive configuration scheme set generated based on the reactive priority configuration node set, and a reactive equipment capacity set corresponding to different nodes in each scheme; constructing an evaluation index set including a voltage stability index, a transient voltage recovery contribution rate index, a regulation range utilization index, a device response speed index, and a device investment cost index based on the reactive priority configuration node set, the multiple type reactive configuration scheme set, and the reactive equipment capacity set through anticipated accident set simulation and dynamic voltage response analysis; and constructing an evaluation index value based on the voltage stability index value, transient voltage recovery contribution rate index value, regulation range utilization rate index value, and each scheme in the evaluation index set. The device response speed index value and the device investment cost index value are standardized by the range normalization method to generate a normalized index set; based on the normalized index set, by calculating the correlation coefficient matrix and standard deviation variability between each index, the CRITIC method is used to combine the correlation coefficient matrix and the standard deviation variability to determine the weight set of the voltage stability index, transient voltage recovery contribution rate index, regulation range utilization index, device response speed index and device investment cost index; based on the standardized index values ​​in the normalized index set and the weight coefficients of each index in the weight set, a comprehensive score set of each multi-type reactive configuration scheme is generated by weighted summation, and the optimal configuration scheme is determined according to the maximum value in the comprehensive score set. This application realizes a comprehensive and systematic evaluation of multiple multi-type reactive configuration schemes by constructing a multi-type reactive configuration evaluation index system for the receiving-end power grid, thereby more effectively seeking a balance between reactive equipment type selection, power grid stability requirements and equipment investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the installation process of the high-voltage cable gas monitoring device in this application. DETAILED DESCRIPTION

[0045] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that various forms of implementation of the present disclosure are not limited to the embodiments set forth herein. Rather, the embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0046] Please refer to Figure 1 As shown, the present application provides a multi-type reactive power configuration scheme evaluation method, including:

[0047] S101, obtaining a reactive power priority configuration node set within a power system partition, a set of multiple reactive power configuration schemes generated based on the reactive power priority configuration node set, and a set of reactive equipment capacities corresponding to different nodes in each scheme;

[0048] Develop multiple types of reactive power configuration plans for the preferred nodes in a certain zone, including:

[0049] Formulate a set of multi-type reactive power configuration schemes for a power system partition i}, reactive priority configuration node set in the partition {N j}, the reactive equipment capacity set corresponding to the reactive configuration scheme under different reactive nodes is {Q ij}.

[0050] Among them, S i represents the i-th scheme in the set of multiple types of reactive power configuration schemes, N j Indicates the jth node in the reactive priority configuration node set, Q ij It represents the reactive equipment capacity planned for the jth reactive power priority configuration node in the i-th reactive power configuration scheme.

[0051] For multiple types of reactive power configuration schemes {S i}, the sum of the planned reactive equipment capacity of the i-th scheme is:

[0052]

[0053] S102. Based on the reactive power priority configuration node set, the multi-type reactive power configuration scheme set, and the reactive equipment capacity set, constructing a set of evaluation indicators including a voltage stability index, a transient voltage recovery contribution rate index, a regulation range utilization index, a device response speed index, and a device investment cost index through a simulated accident set and dynamic voltage response analysis;

[0054] A multi-type reactive power configuration evaluation index system for the receiving power grid is constructed, and five evaluation indicators are proposed: voltage stability, reactive power transient voltage recovery contribution rate, regulation range utilization rate, device response speed, and device investment cost:

[0055] Define the voltage stability evaluation index of the i-th scheme as a i1 , the calculation formula is as follows:

[0056]

[0057] in, is the steady-state voltage amplitude at time 0 before the j-th node fault, is the transient voltage amplitude of the jth node at time t, t∈(0,Δt); U L is the maximum voltage deviation level limit; Wj.t is the rate of change of steady-state voltage and transient voltage; N b is the number of nodes in the power system; H is the number of expected accident sets in the power system; is the probability of the Hth expected accident.

[0058] Define the transient voltage recovery contribution rate evaluation index of the i-th scheme as a i2 , the calculation formula is as follows:

[0059]

[0060] Among them, T 0.9 T is the moment when the bus voltage recovers to 0.9 pu after a fault occurs in the partition. fault The moment the failure occurred within this partition.

[0061] Set the adjustment range utilization evaluation index of the i-th scheme to be a i3 , the calculation formula is as follows:

[0062]

[0063] Among them, Q s i is the sum of the planned reactive equipment regulation ranges of the i-th scheme, Q t i is the reactive equipment capacity put into operation at time t for the i-th scheme, where t∈(0,Δt).

[0064] Define the device response speed evaluation index of the i-th solution as a i4 , define the device investment cost evaluation index of the i-th scheme as a i5 .

[0065] S103, based on the voltage stability index value, transient voltage recovery contribution rate index value, regulation range utilization index value, device response speed index value, and device investment cost index value of each scheme in the evaluation index set, normalize the index values ​​using a range normalization method to generate a normalized index set;

[0066] With {a ik} represents the five evaluation indicators, namely voltage stability, transient voltage change rate, reactive power regulation range, device response speed and device investment cost, which constitute the indicator set.

[0067] Where k = 1,…,5; a ik represents the kth indicator of the i-th solution.

[0068] For {a ik}Use normalization processing and the calculation formula is as follows.

[0069]

[0070] S104. Based on the normalized indicator set, by calculating the correlation coefficient matrix and standard deviation variability between the indicators, and using the CRITIC method to combine the correlation coefficient matrix and the standard deviation variability to determine the weight set of the voltage stability indicator, the transient voltage recovery contribution rate indicator, the regulation range utilization index, the device response speed indicator, and the device investment cost indicator;

[0071] Calculate the weights of the five evaluation indicators after normalization: voltage stability, transient voltage change rate, reactive power regulation range, device response speed, and device investment cost. k represents the weight of the kth indicator.

[0072] First, calculate the correlation coefficient between the two indicators, and use the following formula to express the ε between the kth and k'th indicators kk' :

[0073]

[0074] Secondly, calculate the indicator variability M of the kth indicator first k :

[0075]

[0076] Finally, the CRITIC method is used to calculate the weight β k :

[0077]

[0078] S105 generates a comprehensive score set of various types of reactive power configuration schemes based on the normalized indicator values ​​in the normalized indicator set and the weight coefficients of each indicator in the weight set by weighted summation, and determines the optimal configuration scheme according to the maximum value in the comprehensive score set.

[0079] According to the normalized index value and index weight, each multi-type reactive power configuration scheme set {S i} scoring, the score of the i-th solution is s i , s i The calculation formula is as follows:

[0080]

[0081] For example, three multi-type reactive power configuration schemes are proposed for power system A. The scheme sets include Scheme 1, Scheme 2, and Scheme 3. The nodes in the reactive power priority configuration node set in each scheme are the same, with a total of three nodes. That is, each scheme configures reactive power devices in Node 1, Node 3, and Node 4.

[0082] The sum of the planned reactive equipment capacity for Scheme 1, Scheme 2, and Scheme 3 is 560Mvar, 600Mvar, and 580Mvar, respectively.

[0083] Construct a multi-type reactive configuration evaluation index system for the receiving power grid. Five evaluation indicators can be calculated for schemes 1 to 3: voltage stability, reactive transient voltage recovery contribution rate, regulation range utilization, device response speed, and device investment cost. i4 For example, the indicators corresponding to schemes 1 to 3 are a 14 、a 24 、a 34 , with values ​​of 90ms, 200ms, and 120ms respectively. i5 For example, the indicators corresponding to schemes 1 to 3 are a 15 、a 25 、a 35 , with values ​​of 560 million yuan, 900 million yuan and 780 million yuan respectively.

[0084] After normalizing the indicators for each unit in Schemes 1 through 3, the weights of the five indicators, β1, β2, β3, β4, and β5, are calculated to be 0.30, 0.23, 0.21, 0.15, and 0.11, respectively. Multiplying the weights by the normalized indicator values ​​for each scheme yields the scores for each scheme. For example, if the scores for Schemes 1 through 3 are 0.61, 0.54, and 0.33, respectively, Scheme 1 has the highest score and can be used as the recommended reactive power configuration for reactive power planning.

[0085] The present application also provides a device for evaluating multiple types of reactive power configuration schemes, including:

[0086] An acquisition module is configured to acquire a reactive power priority configuration node set within a power system partition, a set of multiple reactive power configuration schemes generated based on the reactive power priority configuration node set, and a set of reactive equipment capacities corresponding to different nodes in each scheme;

[0087] An indicator module, based on the reactive power priority configuration node set, the multi-type reactive power configuration scheme set, and the reactive power equipment capacity set, constructs an evaluation indicator set including a voltage stability indicator, a transient voltage recovery contribution rate indicator, a regulation range utilization rate indicator, a device response speed indicator, and a device investment cost indicator through a simulated accident set and dynamic voltage response analysis;

[0088] a standard module, which standardizes the index values ​​by using a range normalization method based on the voltage stability index value, transient voltage recovery contribution rate index value, regulation range utilization index value, device response speed index value, and device investment cost index value of each scheme in the evaluation index set to generate a normalized index set;

[0089] a weighting module, based on the normalized indicator set, calculating a correlation coefficient matrix and a standard deviation variability among the indicators, and determining a weighting set of the voltage stability indicator, the transient voltage recovery contribution rate indicator, the regulation range utilization rate indicator, the device response speed indicator, and the device investment cost indicator by combining the correlation coefficient matrix and the standard deviation variability using a CRITIC method;

[0090] The analysis module generates a comprehensive score set of each type of reactive power configuration scheme by weighted summation based on the standardized indicator values ​​in the normalized indicator set and the weight coefficients of each indicator in the weight set, and determines the optimal configuration scheme according to the maximum value in the comprehensive score set.

[0091] Furthermore, the indicator module constructs an evaluation indicator set including a voltage stability indicator, a transient voltage recovery contribution rate indicator, a regulation range utilization index, a device response speed indicator, and a device investment cost indicator based on the reactive power priority configuration node set, the multi-type reactive power configuration scheme set, and the reactive power equipment capacity set through a simulated accident set and dynamic voltage response analysis, including:

[0092] Calculating the voltage stability index by integrating the voltage deviation according to the pre-fault steady-state voltage amplitude, transient voltage amplitude time series, and expected accident probability distribution of each node in the reactive priority configuration node set;

[0093] Based on the total planned capacity in the reactive equipment capacity set and the difference between the time when the zone bus fault occurs and the time when the voltage recovers to the preset threshold in each scheme, the transient voltage recovery contribution rate index is calculated by the time-capacity ratio;

[0094] Calculating the utilization index of the regulation range by using capacity utilization statistics based on the upper limit of the reactive regulation range planned in the reactive equipment capacity set and the actual input capacity dynamic curve under the expected accident scenario;

[0095] Obtaining the action delay parameters of the mechanical switches or power electronic devices of the shunt capacitors, synchronous condensers, and dynamic VAR compensation devices in each solution, and determining the response speed index of the devices;

[0096] The unit capacity cost and installation and maintenance costs corresponding to the reactive equipment type of each solution are obtained, and the device investment cost index is calculated by accumulating the costs.

[0097] Furthermore, the weight module determines a weight set of the voltage stability index, the transient voltage recovery contribution rate index, the regulation range utilization index, the device response speed index, and the device investment cost index based on the normalized index set by calculating the correlation coefficient matrix and the standard deviation variability between the indicators and synthesizing the correlation coefficient matrix and the standard deviation variability using the CRITIC method, including:

[0098] The weight set is generated by calculating the Pearson correlation coefficient between each indicator in the correlation coefficient matrix and the standard deviation of each indicator in the standard deviation variability, combined with the conflict and information analysis of the CRITIC method.

[0099] Furthermore, the weight module generates a comprehensive score set of each type of reactive power configuration scheme based on the normalized indicator value in the normalized indicator set and the weight coefficient of each indicator in the weight set by weighted summation, and determines the optimal configuration scheme according to the maximum value in the comprehensive score set, including:

[0100] The comprehensive score set is generated by linearly superimposing the index values ​​after the standardization process and the corresponding weight coefficients, and the optimal configuration scheme is determined according to the score ranking.

[0101] Furthermore, the acquisition module acquires a reactive power priority configuration node set within a power system partition, a set of multiple reactive power configuration schemes generated based on the reactive power priority configuration node set, and a set of reactive equipment capacities corresponding to different nodes in each scheme, including:

[0102] Obtaining short-circuit capacity data of each node in the power system partition, screening nodes whose short-circuit capacity is lower than a preset threshold, and generating a set of candidate nodes;

[0103] Based on the voltage sensitivity parameters of each node in the candidate node set, the top N high-sensitivity nodes are selected by descending sorting to generate the reactive power priority configuration node set.

[0104] The above description of the embodiments is intended to facilitate understanding and application of the present invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to the above embodiments can be made, and the general principles described herein can be applied to other embodiments without requiring inventive effort. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the present disclosure are intended to fall within the scope of protection of the present invention.

Claims

1. A method for evaluating multiple types of reactive power configuration schemes, characterized in that: include: Acquire a reactive power priority configuration node set within a power system partition, a set of multiple reactive power configuration schemes generated based on the reactive power priority configuration node set, and a set of reactive equipment capacities corresponding to different nodes in each scheme; Based on the reactive power priority configuration node set, the multi-type reactive power configuration scheme set, and the reactive equipment capacity set, a set of evaluation indicators including a voltage stability index, a transient voltage recovery contribution rate index, a regulation range utilization index, a device response speed index, and a device investment cost index is constructed through a simulated accident set and a dynamic voltage response analysis; Based on the voltage stability index value, transient voltage recovery contribution rate index value, regulation range utilization index value, device response speed index value and device investment cost index value of each scheme in the evaluation index set, the index values ​​are normalized by a range normalization method to generate a normalized index set; Based on the normalized indicator set, by calculating the correlation coefficient matrix and standard deviation variability between the indicators, and combining the correlation coefficient matrix and the standard deviation variability with the CRITIC method, a weight set of the voltage stability indicator, the transient voltage recovery contribution rate indicator, the regulation range utilization index, the device response speed indicator, and the device investment cost indicator is determined; Based on the normalized indicator values ​​in the normalized indicator set and the weight coefficients of each indicator in the weight set, a comprehensive score set of each type of reactive power configuration scheme is generated by weighted summation, and the optimal configuration scheme is determined according to the maximum value in the comprehensive score set.

2. A multi-type reactive power configuration scheme evaluation method according to claim 1, characterized in that: Based on the reactive power priority configuration node set, the multi-type reactive power configuration scheme set, and the reactive equipment capacity set, through the simulation of the expected accident set and the dynamic voltage response analysis, an evaluation index set including a voltage stability index, a transient voltage recovery contribution rate index, a regulation range utilization index, a device response speed index, and a device investment cost index is constructed, including: Calculating the voltage stability index by integrating the voltage deviation according to the pre-fault steady-state voltage amplitude, transient voltage amplitude time series, and expected accident probability distribution of each node in the reactive priority configuration node set; Based on the total planned capacity in the reactive equipment capacity set and the difference between the time when the zone bus fault occurs and the time when the voltage recovers to the preset threshold in each scheme, the transient voltage recovery contribution rate index is calculated by the time-capacity ratio; Calculating the utilization index of the regulation range by using capacity utilization statistics based on the upper limit of the reactive regulation range planned in the reactive equipment capacity set and the actual input capacity dynamic curve under the expected accident scenario; Obtaining the action delay parameters of the mechanical switches or power electronic devices of the shunt capacitors, synchronous condensers, and dynamic VAR compensation devices in each solution, and determining the response speed index of the devices; The unit capacity cost and installation and maintenance costs corresponding to the reactive equipment type of each solution are obtained, and the device investment cost index is calculated by accumulating the costs.

3. The method for evaluating multiple types of reactive power configuration schemes according to claim 1, wherein: Based on the normalized indicator set, by calculating the correlation coefficient matrix and standard deviation variability between the indicators, the CRITIC method is used to combine the correlation coefficient matrix and the standard deviation variability to determine the weight set of the voltage stability indicator, the transient voltage recovery contribution rate indicator, the regulation range utilization index, the device response speed indicator, and the device investment cost indicator, including: The weight set is generated by calculating the Pearson correlation coefficient between each indicator in the correlation coefficient matrix and the standard deviation of each indicator in the standard deviation variability, combined with the conflict and information analysis of the CRITIC method.

4. The method for evaluating multiple types of reactive power configuration schemes according to claim 1, wherein: Based on the normalized indicator values ​​in the normalized indicator set and the weight coefficients of the indicators in the weight set, a comprehensive score set of each type of reactive power configuration scheme is generated by weighted summation, and an optimal configuration scheme is determined according to the maximum value in the comprehensive score set, including: The comprehensive score set is generated by linearly superimposing the index values ​​after the standardization process and the corresponding weight coefficients, and the optimal configuration scheme is determined according to the score ranking.

5. The method for evaluating multiple types of reactive power configuration schemes according to claim 1, characterized in that: Obtaining a reactive power priority configuration node set within a power system partition, a set of multiple reactive power configuration schemes generated based on the reactive power priority configuration node set, and a set of reactive equipment capacities corresponding to different nodes in each scheme, including: Obtaining short-circuit capacity data of each node in the power system partition, screening nodes whose short-circuit capacity is lower than a preset threshold, and generating a set of candidate nodes; Based on the voltage sensitivity parameters of each node in the candidate node set, the top N high-sensitivity nodes are selected by descending sorting to generate the reactive power priority configuration node set.

6. A device for evaluating multiple types of reactive power configuration schemes, characterized in that: include: An acquisition module is configured to acquire a reactive power priority configuration node set within a power system partition, a set of multiple reactive power configuration schemes generated based on the reactive power priority configuration node set, and a set of reactive equipment capacities corresponding to different nodes in each scheme; An indicator module, based on the reactive power priority configuration node set, the multi-type reactive power configuration scheme set, and the reactive power equipment capacity set, constructs an evaluation indicator set including a voltage stability indicator, a transient voltage recovery contribution rate indicator, a regulation range utilization rate indicator, a device response speed indicator, and a device investment cost indicator through a simulated accident set and dynamic voltage response analysis; a standard module, which standardizes the index values ​​by using a range normalization method based on the voltage stability index value, transient voltage recovery contribution rate index value, regulation range utilization index value, device response speed index value, and device investment cost index value of each scheme in the evaluation index set to generate a normalized index set; a weighting module, based on the normalized indicator set, calculating a correlation coefficient matrix and a standard deviation variability among the indicators, and determining a weighting set of the voltage stability indicator, the transient voltage recovery contribution rate indicator, the regulation range utilization rate indicator, the device response speed indicator, and the device investment cost indicator by combining the correlation coefficient matrix and the standard deviation variability using a CRITIC method; The analysis module generates a comprehensive score set of each type of reactive power configuration scheme by weighted summation based on the standardized indicator values ​​in the normalized indicator set and the weight coefficients of each indicator in the weight set, and determines the optimal configuration scheme according to the maximum value in the comprehensive score set.

7. The multi-type reactive power configuration scheme evaluation device according to claim 6, characterized in that: The indicator module constructs an evaluation indicator set including a voltage stability indicator, a transient voltage recovery contribution rate indicator, a regulation range utilization rate indicator, a device response speed indicator, and a device investment cost indicator based on the reactive power priority configuration node set, the multi-type reactive power configuration scheme set, and the reactive power equipment capacity set through a simulated accident set and dynamic voltage response analysis, including: Calculating the voltage stability index by integrating the voltage deviation according to the pre-fault steady-state voltage amplitude, transient voltage amplitude time series, and expected accident probability distribution of each node in the reactive priority configuration node set; Based on the total planned capacity in the reactive equipment capacity set and the difference between the time when the zone bus fault occurs and the time when the voltage recovers to the preset threshold in each scheme, the transient voltage recovery contribution rate index is calculated by the time-capacity ratio; Calculating the utilization index of the regulation range by using capacity utilization statistics based on the upper limit of the reactive regulation range planned in the reactive equipment capacity set and the actual input capacity dynamic curve under the expected accident scenario; Obtaining the action delay parameters of the mechanical switches or power electronic devices of the shunt capacitors, synchronous condensers, and dynamic VAR compensation devices in each solution, and determining the response speed index of the devices; The unit capacity cost and installation and maintenance costs corresponding to the reactive equipment type of each solution are obtained, and the device investment cost index is calculated by accumulating the costs.

8. The multi-type reactive power configuration scheme evaluation device according to claim 6, characterized in that: The weight module determines a weight set of the voltage stability index, the transient voltage recovery contribution rate index, the regulation range utilization index, the device response speed index, and the device investment cost index based on the normalized index set by calculating the correlation coefficient matrix and the standard deviation variability between the indicators and synthesizing the correlation coefficient matrix and the standard deviation variability using the CRITIC method, including: The weight set is generated by calculating the Pearson correlation coefficient between each indicator in the correlation coefficient matrix and the standard deviation of each indicator in the standard deviation variability, combined with the conflict and information analysis of the CRITIC method.

9. The multi-type reactive power configuration scheme evaluation device according to claim 6, characterized in that: The weight module generates a comprehensive score set of each type of reactive power configuration scheme based on the normalized indicator value in the normalized indicator set and the weight coefficient of each indicator in the weight set by weighted summation, and determines the optimal configuration scheme according to the maximum value in the comprehensive score set, including: The comprehensive score set is generated by linearly superimposing the index values ​​after the standardization process and the corresponding weight coefficients, and the optimal configuration scheme is determined according to the score ranking.

10. The multi-type reactive power configuration scheme evaluation device according to claim 6, characterized in that: The acquisition module acquires a reactive power priority configuration node set within a power system partition, a set of multiple reactive power configuration schemes generated based on the reactive power priority configuration node set, and a set of reactive equipment capacities corresponding to different nodes in each scheme, including: Obtaining short-circuit capacity data of each node in the power system partition, screening nodes whose short-circuit capacity is lower than a preset threshold, and generating a set of candidate nodes; Based on the voltage sensitivity parameters of each node in the candidate node set, the top N high-sensitivity nodes are selected by descending sorting to generate the reactive power priority configuration node set.

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