Scenario-based analysis and probability assessment of sub-synchronous oscillation caused by wind farms with direct-driven wind generators

doi:https://doi.org/10.1007/s40565-018-0416-2

Home > Archive>Volume 7, Issue 2, 2019 >243-253. DOI:https://doi.org/10.1007/s40565-018-0416-2

DOI:

https://doi.org/10.1007/s40565-018-0416-2

Author:

Zhi AN
Zhi AN
1. Department of Electrical Engineering, Tsinghua University, Beijing, China 2. China State Key Laboratory of Power System and Generation Equipment, Beijing, China
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Chen SHEN
Chen SHEN
1. Department of Electrical Engineering, Tsinghua University, Beijing, China 2. China State Key Laboratory of Power System and Generation Equipment, Beijing, China
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Zetian ZHENG
Zetian ZHENG
1. Department of Electrical Engineering, Tsinghua University, Beijing, China 2. China State Key Laboratory of Power System and Generation Equipment, Beijing, China
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Feng LIU
Feng LIU
1. Department of Electrical Engineering, Tsinghua University, Beijing, China 2. China State Key Laboratory of Power System and Generation Equipment, Beijing, China
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Xiaoqing CHANG
Xiaoqing CHANG
Electric Power Research Institute of Sichuan Electric Power Company, Chengdu, China
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Wei WEI
Wei WEI
Electric Power Research Institute of Sichuan Electric Power Company, Chengdu, China
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Affiliation:

1. Department of Electrical Engineering, Tsinghua University, Beijing, China 2. China State Key Laboratory of Power System and Generation Equipment, Beijing, China 3. Electric Power Research Institute of Sichuan Electric Power Company, Chengdu, China

Fund Project:

This work was supported in part by National Natural Science Foundation of China (No. U1766206, No. 51677098, and No. 51621065).

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Abstract:

Recently, explanations of the sub-synchronous oscillation (SSO) caused by wind farms based on direct-driven wind generators (DDWGs) have been published in the literatures, in which the controller parameters of DDWGs and the system equivalent parameters play an important role. However, more than one set of parameters can cause weakly damped sub-synchronous modes. The most vulnerable and highly possible scenario is still unknown. To find scenarios that have potential oscillation risks, this paper proposes a small disturbance model of wind farms with DDWGs connected to the grid using a state-space modeling technique. Taguchi’s orthogonal array testing is introduced to generate different scenarios. Multiple scenarios with different parameter settings that may lead to SSOs are found. A probabilistic analysis method based on the Gaussian mixture model is employed to evaluate the consistency of these scenarios with the actual accidents. Electromagnetic transient simulations are performed to verify the findings.

Key words:Direct-driven wind generator, Sub-synchronous oscillation, Probabilistic assessment, Randomness

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Online: March 08,2019
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