Fatigue Distribution and Active Power Combined Control in Offshore Wind Farm
Su Yongxin1, Duan Bin1, Zhu Guanghui2, 3, Fan Yonghua4
1. Xiangtan University Xiangtan 411105 China; 2. State Key Laboratory of Offshore Wind Power Technology and Detection Xiangtan 411101 China; 3. National Energy Wind Turbine R&D (Experimental) Center Xiangtan 411101 China; 4. China Electric Power Research Institute Beijing 100192 China
Abstract To solve the unbalanced fatigue distribution over a wind farm and its optimization methods mismatching the active power demands of power grid, a novel control strategy was proposed. Based on optimal control theory, and by converting fatigue problem into active power controlling problem, the strategy can balance fatigue distribution using the active power margin on the condition that wind farms give up some wind power. Moreover, the strategy considered the impart of wake effect of wind turbine to improve the control accuracy. A solution based on intelligent agent was proposed to ensure the control strategy could execute in the existing computing devices of wind farm. In this solution each wind turbine was considered as an intelligent agent, and then the hierarchical state machine of each agent was presented, and finally, the communication scheme among agents was presented. The simulation results had shown that the proposed solution was a feasible way to trace the active power demands and to balance fatigue distribution at the same time, which may reduce the maintenance frequency of wind farms.
Su Yongxin,Duan Bin,Zhu Guanghui等. Fatigue Distribution and Active Power Combined Control in Offshore Wind Farm[J]. Transactions of China Electrotechnical Society, 2015, 30(22): 190-198.
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2015, Vol. 30 
