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Direct-driven wind power plant clustering method suitable for subsynchronous oscillation analysis

A sub-synchronous oscillation, direct-drive technology, applied in electrical digital data processing, character and pattern recognition, instruments, etc., can solve the problems of inability to model each fan and the limitation of the number of simulation nodes.

Pending Publication Date: 2020-10-02
XIAN THERMAL POWER RES INST CO LTD +1
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AI Technical Summary

Problems solved by technology

Electromagnetic transient simulation software is an effective tool for analyzing power system stability problems, but it is limited by the number of simulation nodes
Therefore, the difficulty of subsynchronous oscillation simulation analysis of large-scale wind farms lies in the inability to model each wind turbine in detail

Method used

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  • Direct-driven wind power plant clustering method suitable for subsynchronous oscillation analysis
  • Direct-driven wind power plant clustering method suitable for subsynchronous oscillation analysis
  • Direct-driven wind power plant clustering method suitable for subsynchronous oscillation analysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0090] In order to verify the correctness of this method, the setting example is shown in the following table:

[0091] Table 1 Parameters of fans to be grouped

[0092]

[0093]

[0094] The grid-connected voltage V of all wind turbines is equal to 636V. According to this method for grouping, the results are as follows:

[0095] Table 2 Grouping results

[0096]

[0097] According to the clustering results, cluster I takes wind turbine No. 1 as the cluster center, and cluster II takes wind turbine No. 3 as the cluster center. It is considered that the control parameters of the wind turbines in the same group are equal to the cluster center parameters of the wind turbines in this group. Finally, the analytical formula of aggregate impedance of the two groups of fans can be obtained according to formula (7).

[0098] In order to verify the correctness of the grouping results, the parallel impedance and aggregate impedance amplitude-frequency characteristics of the t...

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Abstract

A direct-driven wind power plant clustering method suitable for subsynchronous oscillation analysis comprises the steps: firstly, inputting parameters of all fans of a direct-driven wind power plant to be clustered, and establishing a direct-driven wind power plant external impedance analysis model; secondly, carrying out complexity analysis on the direct-drive fan external impedance model, and determining main factors influencing the order of the direct-drive fan external impedance model; then, performing normalization sensitivity analysis on the direct-drive fan external impedance analyticalmodel, and giving impedance sensitivity of the direct-drive fan relative to each parameter; and finally, quantitatively giving a clustering index according to a sensitivity analysis result, clustering the fans in the wind power plant by using a clustering algorithm, and giving an aggregation impedance expression of the fans in the same group. According to the method, the fans in the wind field are divided into a plurality of clusters by taking similar external impedance characteristics of the direct-driven fans as a target, and quantitative control of impedance errors of the fans in the samecluster is achieved.

Description

technical field [0001] The invention belongs to the field of power systems, relates to the equivalent field of direct-drive wind farms, and in particular relates to a grouping method for direct-drive wind farms suitable for subsynchronous oscillation analysis. Background technique [0002] The proportion of new energy power access systems is gradually increasing, which brings new challenges to the safe and stable operation of power systems, including stability issues such as subsynchronous oscillations. Electromagnetic transient simulation software is an effective tool for analyzing power system stability, but it is limited by the number of simulation nodes. Therefore, the difficulty in the simulation analysis of subsynchronous oscillation of large-scale wind farms lies in the inability to model each wind turbine in detail. With the construction of large-scale wind power bases in China, the modeling and simulation analysis of subsynchronous oscillation induced by direct-dri...

Claims

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Application Information

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IPC IPC(8): G06F30/27G06K9/62G06F113/06
CPCG06F30/27G06F2113/06G06F18/23213Y02E10/76
Inventor 舒进袁赛军都劲松杨俊马骁骅马晋辉蒋成文李晓博贾明祥马瑞瑞
Owner XIAN THERMAL POWER RES INST CO LTD
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