Study of Sub-Synchronous Interaction in Doubly-Fed Wind Power Systems

Abstract:

When doubly fed wind power generation system transmits power to power grid through the series compensation, once the external disturbances is close to the natural sonant frequency, there is a trouble of synchronous oscillation between the rotor side and the series capacitor. The paper analyzes the condition of resonance and its mechanism. According the actual argument provide by north china wind power plant, we use PSCAD to build a 1.25MW doubly fed wind power generation model to analyze the synchronous oscillation. We adopt time-domain simulation method to analyze that as the change of series compensation degree the system subsynchronous resonance frequency changes as well as the influence to doubly fed fan current and power. The simulation result is basically the same as the fault wave record monitoring data result of actual site when wind power plant take off the network .Consequently to verify the validity of the simulation platform. To verify the improvement of the converter control strategy to build simulation platform.

• Periodical: Applied Mechanics and Materials (Volume 722)
• Pages: 276-280
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.722.276
• Online since: December 2014
• Authors: Tao Zhang*, Xi Tian Wang, Yang Zhang
• Keywords: Doubly Fed Induction Generator, Series Compensation, Sub-Synchronous Oscillations

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