A wind turbine electrical performance comprehensive evaluation method based on a drive chain ground test platform

Abstract

The application discloses a kind of wind turbine electrical performance comprehensive evaluation method based on transmission chain ground test platform, belong to wind power generation technical field.The method includes: the three-level structure model of " target layer-criterion layer-index layer" is constructed;Test data is collected by using transmission chain ground test platform to simulate multiple preset conditions, form evaluation data matrix;Introduce historical unqualified rate data, determine the weight of each evaluation index using improved analytic hierarchy process;Establish two-dimensional single-index quantification scoring system combining test condition coverage and standard satisfaction degree, calculate single score;Transmission chain electrical performance total score is calculated based on weighted comprehensive formula;Transmission chain performance is evaluated according to preset grade division standard.The present application solves the one-sidedness problem caused by single condition, single index evaluation of traditional evaluation method, realizes the systematic, quantitative evaluation of wind turbine transmission chain electrical performance, and can be used for health state classification management and operation and maintenance decision.

Description

Technical Field

[0001] This invention belongs to the field of wind power generation technology, specifically relating to a comprehensive evaluation method for the electrical performance of wind turbine generators based on a ground test platform for transmission chains. Background Technology

[0002] As a key system for converting wind energy into electrical energy, the drivetrain of a wind turbine directly affects the overall power generation efficiency, operational stability, and grid compatibility of the turbine. With the continuous increase in the single-unit capacity of wind turbines, especially the large-scale development of offshore wind power, higher requirements are being placed on the comprehensive evaluation of the electrical performance of the wind turbine drivetrain.

[0003] In the industry, high-power wind turbine drivetrain testing is typically conducted in real-world environments. However, the offshore environment is characterized by random and uncertain wind conditions, and certain test scenarios (such as grid fault ride-through and extreme turbulence) often take months to occur. This results in long testing cycles, high costs, and poor repeatability. To address this issue, it is necessary to build a ground-based drivetrain testing platform to realistically reproduce the dynamic operating characteristics of high-power wind turbine drivetrains, serving as a basis for evaluating drivetrain performance.

[0004] Currently, some domestic and international standards have specified requirements for the performance evaluation of wind turbine drivetrains. For example, GB / T35854-2018 "Measuring and Evaluation of Mechanical Vibration of Wind Turbine Generators and Their Components" specifies the conditions and methods for measuring and evaluating the mechanical vibration of wind turbine generators and their components; GB / T 19073-2018 "Design Requirements for Gearboxes of Wind Turbine Generators" sets relevant requirements for the oil sump temperature and bearing temperature of the gearbox; and IEC 61400-21:2022 defines relevant testing and evaluation methods for the grid compatibility of wind turbine generators. However, the above standards have the following shortcomings:

[0005] First, the above standards only evaluate a single operating condition and a single indicator, and cannot fully reflect the comprehensive performance of the wind turbine drive train under various extreme and normal operating conditions in actual operation.

[0006] Second, the existing standards system is scattered across different fields such as mechanical vibration, temperature, and power grid compatibility, lacking a unified, comprehensive evaluation framework oriented towards electrical performance, making it difficult to systematically evaluate the overall electrical performance of the drive train.

[0007] Third, traditional evaluation methods for the electrical performance of transmission chains typically employ a single indicator and a single operating condition, failing to consider the differences in the importance of different evaluation indicators and the coverage of test conditions. This results in a one-sided evaluation that cannot provide sufficient scientific basis for product design optimization, the formulation of differentiated operation and maintenance strategies, and unit decommissioning decisions.

[0008] Therefore, there is an urgent need to develop a comprehensive performance evaluation method for transmission chains based on a multi-degree-of-freedom test platform, which integrates the three dimensions of working condition coverage, standard compliance, and indicator importance into the ground test evaluation of the transmission chain, so as to achieve a systematic and quantitative evaluation of the electrical performance of the transmission chain. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of the prior art and provide a comprehensive evaluation method for the electrical performance of wind turbines based on a ground test platform for the transmission chain. This method addresses the one-sidedness of traditional evaluation methods due to evaluation under a single operating condition and with a single index, and enables a systematic and quantitative evaluation of the electrical performance of the transmission chain.

[0010] To achieve the above objectives, the present invention adopts the following technical solution: a comprehensive evaluation method for the electrical performance of wind turbine generators based on a ground test platform for transmission chains, comprising the following steps:

[0011] Step S1: Construct a hierarchical structure model: Establish a hierarchical structure including a target layer, a criterion layer, and an indicator layer; the target layer is the electrical performance of the transmission chain, the criterion layer includes power quality, generator efficiency, reactive power control, active power control, generator insulation resistance, generator DC resistance, generator withstand voltage, converter efficiency, and converter impact resistance, and the indicator layer contains the specific electrical physical quantities under each criterion layer.

[0012] Step S2, Data Acquisition: Using the transmission chain ground test platform to simulate various preset operating conditions of the wind turbine under test, electrical performance data under different operating conditions are collected to form an evaluation data matrix containing the measured values ​​of each evaluation index under each operating condition.

[0013] Step S3, Weight Determination: Based on the historical non-compliance rate data of each evaluation indicator, the analytic hierarchy process is used to construct a judgment matrix, and the weight vector of each evaluation indicator is calculated and obtained.

[0014] Step S4, Individual Scoring: For each evaluation indicator, obtain the measured value of the corresponding evaluation indicator based on the evaluation data matrix, and calculate the individual evaluation score by combining the test condition coverage and standard satisfaction.

[0015] Step S5, Comprehensive Calculation: Based on the scores of each individual indicator and their corresponding weights, calculate the total electrical performance score of the transmission chain using a weighted comprehensive formula;

[0016] Step S6, Grade Assessment: Based on the calculated total score and referring to the preset performance grade classification standard, determine the final grade of the electrical performance of the transmission chain.

[0017] Further, in step S1, the specific electrical physical quantities included in the index layer include: short-time flicker, voltage imbalance, power change rate, total harmonic distortion rate of voltage, generator input power to output power ratio, steady-state accuracy of reactive power control, dynamic response time of reactive power control, power change rate of reactive power control, steady-state accuracy of active power control, dynamic response time of active power control, power change rate of active power control, stator winding insulation resistance, rotor winding insulation resistance, stator winding DC resistance, rotor winding DC resistance, stator winding withstand voltage, rotor winding withstand voltage, converter input power to output power ratio, and converter Du / dt peak voltage.

[0018] Furthermore, in step S3, the method for determining the weight vector is as follows:

[0019] Collect various evaluation indicators Corresponding historical non-conformance rate data Evaluation indicators According to the non-conforming rate Sort the data in ascending order and assign weights accordingly. ;

[0020] Set the sorted indicators The weight base is ,index The weight base is Then the indicator Compared to Importance weights are ;

[0021] Based on the aforementioned weight relationships, a judgment matrix is ​​constructed, and consistency checks and normalization are performed on the judgment matrix to finally obtain the weight vector of each indicator. .

[0022] Further, in step S4, the calculation method for the single-item evaluation score 'a' is as follows:

[0023] a = Z × 30% + W × 70%

[0024] Where Z represents the test condition coverage score, and W represents the standard satisfaction score.

[0025] Furthermore, the method for calculating the test condition coverage score Z is as follows:

[0026] Z = 5 × (X / Y)

[0027] Where X represents the number of measured working conditions, and Y represents the total number of working conditions to be measured corresponding to the index.

[0028] Furthermore, the preset operating conditions used for evaluating the coverage of test conditions include cold operating conditions, hot operating conditions, static operating conditions, 50% load operating conditions, rated load operating conditions, 110% overload operating conditions, and weak magnetic field operating conditions for wind turbine units.

[0029] Furthermore, the method for calculating the standard satisfaction score W is as follows:

[0030] Obtain historical evaluation datasets of individual electrical performance indicators of the drivetrain of similar models. Calculate the average value of historical data and standard deviation ;

[0031] According to the Raida criterion, the standard satisfaction score W is assigned based on the interval in which the measured value W of the evaluation index falls:

[0032] like Then assign the value W=5;

[0033] like Therefore, W=4;

[0034] like Then assign the value W=3;

[0035] like Then W=2;

[0036] like If W=1, then W=1;

[0037] For values ​​of W that are in the middle, interpolation is used for assignment.

[0038] Further, in step S5, the weighted aggregation formula is:

[0039] ;

[0040] Where S represents the total electrical performance score, This represents the individual evaluation score for the i-th indicator. Let be the weight of the i-th indicator.

[0041] Further, in step S6, the performance level classification standard is as follows:

[0042] when At that time, the grade was "inferior";

[0043] when At that time, the level was "defect";

[0044] when At that time, the level was "normal";

[0045] when At that time, the rating was "Good";

[0046] when At that time, the grade was "Excellent".

[0047] The present invention also provides a comprehensive evaluation system for the electrical performance of wind turbines based on a ground test platform for transmission chains, including a memory, a processor, and computer program instructions stored in the memory and capable of being executed by the processor. When the processor executes the computer program instructions, it can implement the above-mentioned method.

[0048] Compared with the prior art, the present invention has the following beneficial effects:

[0049] First, this invention establishes a three-tiered hierarchical structure model of "target layer - criterion layer - index layer", which decomposes the electrical performance of the transmission chain into 9 criterion layer indices and more than 20 index layer indices, realizing a comprehensive and systematic evaluation of the electrical performance of the transmission chain and overcoming the one-sidedness of traditional single index evaluation.

[0050] Second, this invention introduces historical non-compliance rate data to determine the weight of indicators, and uses objective statistical data to replace subjective expert scoring, making the weight allocation more scientific, objective and reasonable.

[0051] Third, this invention establishes a two-dimensional single-index quantitative scoring system that combines "test condition coverage" and "standard satisfaction". It takes into account both the sufficiency of test conditions and the superiority or inferiority of measured performance relative to the industry level, making the evaluation results more comprehensive and reliable.

[0052] Fourth, this invention transforms complex multi-indicator evaluation results into intuitive grade conclusions (poor, defective, average, good, excellent) through weighted comprehensive scoring and grading, making it easier for engineering technicians to quickly determine the health status of the transmission chain.

[0053] Fifth, the evaluation results of this invention can not only be used for the hierarchical management of the health status of the drive train, but also provide a scientific basis for product design optimization, the formulation of differentiated operation and maintenance strategies, and the decision-making on unit decommissioning. Attached Figure Description

[0054] Figure 1 This is a flowchart of the comprehensive evaluation method for the electrical performance of wind turbine generators based on a ground test platform of the transmission chain provided in the embodiments of the present invention;

[0055] Figure 2 This is a schematic diagram illustrating the implementation process of the comprehensive evaluation method for the electrical performance of wind turbine units based on a ground test platform of the transmission chain provided in this embodiment of the invention. Detailed Implementation

[0056] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0057] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0058] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0059] like Figure 1-2 As shown, this embodiment provides a comprehensive evaluation method for the electrical performance of wind turbine generators based on a ground test platform for the transmission chain, including the following steps:

[0060] Step S1: Construct a hierarchical structure model: Establish a hierarchical structure including a target layer, a criterion layer, and an indicator layer; the target layer is the electrical performance of the transmission chain, the criterion layer includes power quality, generator efficiency, reactive power control, active power control, generator insulation resistance, generator DC resistance, generator withstand voltage, converter efficiency, and converter impact resistance, and the indicator layer contains the specific electrical physical quantities under each criterion layer.

[0061] Step S2, Data Acquisition: Using the transmission chain ground test platform to simulate various preset operating conditions of the wind turbine under test, electrical performance data under different operating conditions are collected to form an evaluation data matrix containing the measured values ​​of each evaluation index under each operating condition.

[0062] Step S3, Weight Determination: Based on the historical non-compliance rate data of each evaluation indicator, the analytic hierarchy process is used to construct a judgment matrix, and the weight vector of each evaluation indicator is calculated and obtained.

[0063] Step S4, Individual Scoring: For each evaluation indicator, obtain the measured value of the corresponding evaluation indicator based on the evaluation data matrix, and calculate the individual evaluation score by combining the test condition coverage and standard satisfaction.

[0064] Step S5, Comprehensive Calculation: Based on the scores of each individual indicator and their corresponding weights, calculate the total electrical performance score of the transmission chain using a weighted comprehensive formula;

[0065] Step S6, Grade Assessment: Based on the calculated total score and referring to the preset performance grade classification standard, determine the final grade of the electrical performance of the transmission chain.

[0066] The following section uses a 10MW permanent magnet direct-drive wind turbine transmission chain as an example to explain the specific implementation process of this method in detail.

[0067] I. Constructing a hierarchical structure model

[0068] With the evaluation of the electrical performance of the transmission chain as the overall objective (objective layer A1), a three-level hierarchical structure is constructed:

[0069] Target layer: Electrical performance evaluation of A1 transmission chain.

[0070] Criterion Layer: B1 Power Quality; B2 Generator Efficiency; B3 Reactive Power Control; B4 Active Power Control; B5 Generator Insulation Resistance; B6 Generator DC Resistance; B7 Generator Withstand Voltage; B8 Converter Efficiency; B9 Converter Surge Resistance.

[0071] Indicator Layer: Specific evaluation indicators under each criterion layer include: C11 Short-time flicker, C12 Voltage unbalance, C13 Power change rate, C14 Total harmonic distortion rate of voltage; C21 Generator input power to output power ratio; C31 Steady-state accuracy, C32 Dynamic response time, C33 Power change rate; C41 Steady-state accuracy, C42 Dynamic response time, C43 Power change rate; C51 Stator winding insulation resistance, C52 Rotor winding insulation resistance; C61 Stator winding DC resistance, C62 Rotor winding DC resistance; C71 Stator winding withstand voltage test, C72 Rotor winding withstand voltage test; C81 Converter input power to output power ratio; C91 Converter Du / dt peak voltage.

[0072] II. Determine the test conditions and the number of test conditions.

[0073] The main test condition set is defined as including: cold condition, hot condition, static condition, 50% load condition, rated load condition, 110% overload condition, weak magnetic field condition, and power grid fault ride-through condition.

[0074] The number of test conditions (Y) corresponding to each indicator is shown in the table below:

[0075]

[0076] III. Determining Indicator Weights

[0077] Taking power quality (B1) as an example, an index-level judgment matrix is ​​constructed. Based on the historical data of non-compliance rate, the following are ranked from smallest to largest: power change rate (C13), voltage unbalance (C12), short-time flicker (C11), and total harmonic distortion rate (C14), and are assigned values ​​from 1 to 4 respectively.

[0078] The weight matrix is ​​constructed as follows:

[0079]

[0080] After consistency testing and normalization, the weights of each indicator are obtained as follows:

[0081] C11 short-time flicker: 0.300;

[0082] C12 voltage imbalance: 0.200;

[0083] C13 power change rate: 0.100;

[0084] C14 voltage total harmonic distortion rate: 0.400.

[0085] Similarly, construct the criterion layer judgment matrix. Obtain historical data of electrical performance evaluation indicators and determine the weight values ​​based on the failure rate. Taking historical test data of a certain platform as an example, the failure rates from smallest to largest are: converter efficiency (B8), generator efficiency (B2), reactive power control (B3), active power control (B4), generator withstand voltage (B7), generator insulation resistance (B5), generator DC resistance (B6), power quality (B1), and converter surge resistance (B9), and assign values ​​from 1 to 9 respectively in this order.

[0086] At this time, the weighting coefficients for power quality (B1) are 8, generator efficiency (B2) are 2, reactive power control (B3) are 3, active power control (B4) are 4, generator insulation resistance (B5) are 6, generator DC resistance (B6) are 7, generator withstand voltage (B7) are 5, converter efficiency (B8) is 1, and converter impact resistance (B9) is 9.

[0087] Taking the construction of the weighted relationship between generator efficiency and generator insulation resistance as an example, the weighting coefficient of generator efficiency is assigned a value of 2, and the weighting coefficient of generator insulation resistance is assigned a value of 6. Then the weighting relationship between generator efficiency and generator insulation resistance is 3.

[0088] Further construct the criterion layer weight matrix:

[0089]

[0090] After consistency testing and normalization, the weights of each criterion are obtained as follows:

[0091] B1 power quality: 0.1673;

[0092] B2 generator efficiency: 0.0418;

[0093] B3 reactive power control: 0.0628;

[0094] B4 Active power control: 0.0837;

[0095] B5 insulation resistance: 0.1256;

[0096] B6 DC resistance: 0.1820;

[0097] B7 generator withstand voltage: 0.1251;

[0098] B8 converter efficiency: 0.0233;

[0099] B9 converter's impact resistance: 0.1884.

[0100] IV. Evaluation of Individual Indicators

[0101] Taking the total harmonic distortion rate (C14) of voltage in power quality as an example:

[0102] (1) Evaluation of test condition coverage

[0103] The number of operating conditions to be measured is Y=4 (rated load, 110% overload, weak magnetic field condition, and power grid fault).

[0104] Assume that the number of measured operating conditions is X = 3.

[0105] Coverage score Z = 5 × (3 / 4) = 3.75.

[0106] (2) Evaluation of standard satisfaction

[0107] Historical data on power quality evaluation indicators were obtained. The average value of the total harmonic distortion (THD) index of the power quality voltage in the wind turbine drivetrain was 3.45, and the standard deviation of the evaluation index was 0.32. Assuming the test value is 3.56%, which falls within the interval (3.03, 3.77], the standard satisfaction score based on the interpolation method is 3.34.

[0108] (3) Individual project evaluation score

[0109] a = 3.75 × 30% + 3.34375 × 70% = 3.46

[0110] Similarly, the scores for short-time flicker (C11), voltage imbalance (C12), and power change rate (C13) are calculated, and then the power quality criterion layer score is obtained based on the weights.

[0111] V. Comprehensive Performance Evaluation

[0112] Assume the evaluation scores for each indicator are as shown in the table below:

[0113]

[0114] The total electrical performance score (S = 4.0028) is "Good".

[0115] VI. Analysis and Application of Evaluation Results

[0116] Based on the comprehensive evaluation results, the electrical performance level of this drivetrain is rated as "Good," indicating stable operation, minimal failures, and high efficiency. It is recommended to adopt a strategy of continuous maintenance and performance improvement, with a focus on the highly weighted insulation resistance and withstand voltage test indicators.

[0117] In practical applications, differentiated operation and maintenance strategies can be adopted based on the assessment level:

[0118] For drive trains rated "excellent", the maintenance cycle can be appropriately extended to reduce operation and maintenance costs.

[0119] For drive trains rated "good", a strategy of continuous maintenance and performance improvement is adopted;

[0120] For drive trains of the "general" level, condition monitoring should be strengthened and potential hazards should be identified and addressed in a targeted manner.

[0121] For transmission chains with a "defect" rating, timely maintenance should be arranged to prevent the fault from escalating.

[0122] For "inferior" grade drive trains, replacement or retirement should be considered.

[0123] In addition, the evaluation results can be used for product design optimization—by analyzing the scores of each indicator, design weaknesses can be identified, providing direction for the improvement of the next generation of products.

[0124] This embodiment also provides a comprehensive evaluation system for the electrical performance of wind turbines based on a ground test platform for transmission chains, including a memory, a processor, and computer program instructions stored in the memory and capable of being executed by the processor. When the processor executes the computer program instructions, it can implement the above-mentioned method.

[0125] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0126] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0127] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0128] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0129] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A comprehensive evaluation method for the electrical performance of wind turbine generators based on a ground test platform for transmission chains, characterized in that, Includes the following steps: Step S1: Construct a hierarchical structure model: Establish a hierarchical structure including a target layer, a criterion layer, and an indicator layer; the target layer is the electrical performance of the transmission chain, the criterion layer includes power quality, generator efficiency, reactive power control, active power control, generator insulation resistance, generator DC resistance, generator withstand voltage, converter efficiency, and converter impact resistance, and the indicator layer contains the specific electrical physical quantities under each criterion layer. Step S2, Data Acquisition: Using the transmission chain ground test platform to simulate various preset operating conditions of the wind turbine under test, electrical performance data under different operating conditions are collected to form an evaluation data matrix containing the measured values ​​of each evaluation index under each operating condition. Step S3, Weight Determination: Based on the historical non-compliance rate data of each evaluation indicator, the analytic hierarchy process is used to construct a judgment matrix, and the weight vector of each evaluation indicator is calculated and obtained. Step S4, Individual Scoring: For each evaluation indicator, obtain the measured value of the corresponding evaluation indicator based on the evaluation data matrix, and calculate the individual evaluation score by combining the test condition coverage and standard satisfaction. Step S5, Comprehensive Calculation: Based on the scores of each individual indicator and their corresponding weights, calculate the total electrical performance score of the transmission chain using a weighted comprehensive formula; Step S6, Grade Assessment: Based on the calculated total score and referring to the preset performance grade classification standard, determine the final grade of the electrical performance of the transmission chain.

2. The comprehensive evaluation method for the electrical performance of wind turbine generators based on a ground test platform of the transmission chain as described in claim 1, characterized in that, In step S1, the specific electrical physical quantities included in the index layer include: short-time flicker, voltage imbalance, power change rate, total harmonic distortion rate of voltage, generator input power to output power ratio, steady-state accuracy of reactive power control, dynamic response time of reactive power control, power change rate of reactive power control, steady-state accuracy of active power control, dynamic response time of active power control, power change rate of active power control, stator winding insulation resistance, rotor winding insulation resistance, stator winding DC resistance, rotor winding DC resistance, stator winding withstand voltage, rotor winding withstand voltage, converter input power to output power ratio, and converter Du / dt peak voltage.

3. The comprehensive evaluation method for the electrical performance of wind turbine generators based on a ground test platform of the transmission chain as described in claim 1, characterized in that, In step S3, the method for determining the weight vector is as follows: Collect various evaluation indicators Corresponding historical non-conformance rate data Evaluation indicators According to the non-conforming rate Sort the data in ascending order and assign weights accordingly. ; Set the sorted indicators The weight base is ,index The weight base is Then the indicator Compared to Importance weights are ; Based on the aforementioned weight relationships, a judgment matrix is ​​constructed, and consistency checks and normalization are performed on the judgment matrix to finally obtain the weight vector of each indicator. .

4. The comprehensive evaluation method for the electrical performance of wind turbine generators based on a ground test platform of a transmission chain as described in claim 1, characterized in that, In step S4, the calculation method for the single-item evaluation score 'a' is as follows: a = Z × 30% + W × 70% Where Z represents the test condition coverage score, and W represents the standard satisfaction score.

5. The comprehensive evaluation method for the electrical performance of wind turbine generators based on a ground test platform of a transmission chain as described in claim 4, characterized in that, The method for calculating the test condition coverage score Z is as follows: Z = 5 × (X / Y) Where X represents the number of measured working conditions, and Y represents the total number of working conditions to be measured corresponding to the index.

6. The comprehensive evaluation method for the electrical performance of wind turbine generators based on a ground test platform of a transmission chain as described in claim 5, characterized in that, The preset operating conditions used for evaluating the coverage of test conditions include cold operating conditions, hot operating conditions, static operating conditions, 50% load operating conditions, rated load operating conditions, 110% overload operating conditions, and weak magnetic field operating conditions for wind turbines.

7. The comprehensive evaluation method for the electrical performance of wind turbine generators based on a ground test platform of a transmission chain as described in claim 4, characterized in that, The standard satisfaction score W is calculated as follows: Obtain historical evaluation datasets of individual electrical performance indicators of the drivetrain of similar models. Calculate the average value of historical data and standard deviation ; According to the Raida criterion, the standard satisfaction score W is assigned based on the interval in which the measured value W of the evaluation index falls: like Then assign the value W=5; like Then W=4; like Then assign the value W=3; like Then W=2; like If W=1, then W=1; For values ​​of W that are in the middle, interpolation is used for assignment.

8. The comprehensive evaluation method for the electrical performance of wind turbine generators based on a ground test platform of a transmission chain as described in claim 1, characterized in that, In step S5, the weighted aggregation formula is: ； Where S represents the total electrical performance score, For the i-th indicator, the single-item evaluation score is... Let be the weight of the i-th indicator.

9. The comprehensive evaluation method for the electrical performance of wind turbine generators based on a ground test platform of a transmission chain as described in claim 1, characterized in that, In step S6, the performance level classification standard is as follows: when At that time, the grade was "inferior"; when At that time, the level was "defect"; when At that time, the level was "normal"; when At that time, the rating was "Good"; when At that time, the grade was "Excellent".

10. A comprehensive evaluation system for the electrical performance of wind turbine generators based on a ground test platform for transmission chains, characterized in that, It includes a memory, a processor, and computer program instructions stored in the memory and executable by the processor, wherein when the processor executes the computer program instructions, it can implement the method as described in any one of claims 1-9.

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