Active-Current Control of Large-Scale Wind Turbines for Power System Transient Stability Improvement Based on Perturbation Estimation Approach

Peng Shen, Lin Guan, Zhenlin Huang, Liang Wu and Zetao Jiang
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Peng Shen: School of Electrical Power, South China University of Technology, Guangzhou 510641, China
Lin Guan: School of Electrical Power, South China University of Technology, Guangzhou 510641, China
Zhenlin Huang: School of Electrical Power, South China University of Technology, Guangzhou 510641, China
Liang Wu: School of Electrical Power, South China University of Technology, Guangzhou 510641, China
Zetao Jiang: School of Electrical Power, South China University of Technology, Guangzhou 510641, China

Energies, 2018, vol. 11, issue 8, 1-15

Abstract: This paper proposes an active-current control strategy for large-scale wind turbines (WTs) to improve the transient stability of power systems based on a perturbation estimation (PE) approach. The main idea of this control strategy is to mitigate the generator imbalance of mechanical and electrical powers by controlling the active-current of WTs. The effective mutual couplings of synchronous generators and WTs are identified using a Kron-reduction technique first. Then, the control object of each WT is assigned based on the identified mutual couplings. Finally, an individual controller is developed for each WT using a PE approach. In the control algorithm, a perturbation state (PS) is introduced for each WT to represent the comprehensive effect of the nonlinearities and parameter variations of the power system, and then it is estimated by a designed perturbation observer. The estimated PS is employed to compensate the actual perturbation, and to finally achieve the adaptive control design without requiring an accurate system model. The effectiveness of the proposed control approach on improving the system transient stability is validated in the modified IEEE 39-bus system.

Keywords: wind turbine; power system transient stability; perturbation estimation; effective mutual coupling; perturbation observer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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