DOI:https://doi.org/10.1007/s40565-019-0545-2 |
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Robust subsynchronous interaction damping controller for DFIG-based wind farms |
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Net amount: 542 |
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Author:
Mohsen GHAFOURI1, Ulas KARAAGAC2 , Houshang KARIMI1, Jean MAHSEREDJIAN1
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Author Affiliation:
1 Department of Electrical Engineering, Polytechnique Montreal, Montreal H3T 1J4, Canada 2 Department of Electrical Engineering, The Hong Kong Polytechnic University, Hong Kong, China
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Foundation: |
This work was supported by Canadian Network for Research and Innovation in Machining Technology and Natural Sciences and Engineering Research Council of Canada (No. 10.13039/501100000038). |
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Abstract: |
This paper proposes a robust controller to improve power system stability and mitigate subsynchronous interaction (SSI) between doubly-fed induction generator (DFIG)-based wind farms and series compensated transmission lines. A robust stability analysis is first
carried out to show the impact of uncertainties on the SSI phenomenon. The uncertainties are mainly due to the changes in the power system impedance (e.g., transmission line outages) and the variations of wind farm operating conditions. Then, using the l-synthesis technique, a robust SSI damping controller is designed and augmented to the DFIG control system to effectively damp the SSI oscillations. The output signals of the supplementary controller are dynamically limited to avoid saturating the converters and to provide DFIG with the desired fault-ride-through (FRT) operation during power system faults. The proposed controller is designed for a realistic test system with multiple series capacitor compensated lines. The frequency of the unstable SSI mode varies over a wide range due to the changes in power system topologies and wind farm operating conditions. The performance of the proposed controller is verified through electromagnetic transient (EMT) simulations using a detailed wind farm model. Simulation results also confirm the grid compliant operation of the DFIG. |
Keywords: |
Doubly-fed induction generator (DFIG), Subsynchronous interaction (SSI), l-synthesis, Robust control, Series capacitor compensation |
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Online Time:2019/11/27 |
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