Research on the Key Problems of MPPT Strategy Based on the Active Power Control of Hydraulic Wind Turbine

doi:10.3901/JME.2017.02.192

Journal of Mechanical Engineering ›› 2017, Vol. 53 ›› Issue (2): 192-198.doi: 10.3901/JME.2017.02.192

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Research on the Key Problems of MPPT Strategy Based on the Active Power Control of Hydraulic Wind Turbine

AI Chao^{1, 2, 3}, CHEN Lijuan³, KONG Xiangdong^{1, 2, 3}, CHEN Wenting³, YE Zhuangzhuang³

1. Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control，Yanshan University， Qinhuangdao 066004;
2. Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University)，Ministry of Education of China， Qinhuangdao 066004;
3. College of Mechanical Engineering， Yanshan University， Qinhuangdao 066004

Online:2017-01-20 Published:2017-01-20

Abstract

Abstract: The closed hydraulic system, fix displacement pump-variable displacement motor, is used as the main drive system in wind energy conversion system, synchronous generator connected to the motor is connected to the grid directly, which is different from the traditional gear or direct drive wind turbine, the optimal power tracking strategy as a result needs study. The energy flow and maximum power point tracking strategy based on active power control in hydraulic type wind turbine are introduced, and the key problem is proposed. the power transmission characteristics of wind turbine is analyzed, small signal linearization method combined with variable gain PID are used to solve the power response inconsistent problems that come from system nonlinearity, and the power control strategy is optimized by speed control to insure the system stability. Finally the power response and the maximum power point tracking strategy is verified in the 30kVA semi physical simulation platform.

Key words: active power, hydraulic transmission, maximum power point tracking(MPPT), wind power

AI Chao, CHEN Lijuan, KONG Xiangdong, CHEN Wenting, YE Zhuangzhuang. Research on the Key Problems of MPPT Strategy Based on the Active Power Control of Hydraulic Wind Turbine[J]. Journal of Mechanical Engineering, 2017, 53(2): 192-198.

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Research on the Key Problems of MPPT Strategy Based on the Active Power Control of Hydraulic Wind Turbine

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