학술논문
SSR Alleviation by STATCOM in Induction-Generator-Based Wind Farm Connected to Series Compensated Line
Document Type
Periodical
Author
Source
IEEE Transactions on Sustainable Energy IEEE Trans. Sustain. Energy Sustainable Energy, IEEE Transactions on. 5(3):947-957 Jul, 2014
Subject
Language
ISSN
1949-3029
1949-3037
1949-3037
Abstract
In this paper, a static synchronous compensator (STATCOM) with a voltage controller is proposed to mitigate the potential of sub synchronous resonance (SSR) in a series compensated induction-generator (IG)-based wind farm. Detailed eigenvalue analysis is performed to demonstrate that IG effect SSR is successfully alleviated by STATCOM. The results are validated through electromagnetic transient simulation with PSCAD/EMTDC. The impacts of symmetrical fault at different locations and collector cables are investigated, and the effectiveness of the proposed STATCOM controller is illustrated. It is shown that a three-phase fault close to the wind farm may cause severe oscillations in the point of common coupling (PCC) voltage, electromagnetic torque, and shaft torque of the wind turbine generator. To examine this situation, an equivalent circuit analysis is presented, which predicts the band of resonant speeds within which the wind turbine becomes unstable. The study is extended to other commercially available IGs, which also show the potential for SSR even at realistic levels of series compensation levels, and the capability of the proposed STATCOM controller to obviate its occurrence.