Active Power Control of Hydraulic Wind Turbines during Low Voltage Ride-Through (LVRT) Based on Hierarchical Control

Chao Ai, Guangling Zhou, Yalun Wang, Wei Gao and Xiangdong Kong
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Chao Ai: Key Laboratory of Advanced Forging & Stamping Technology and Science, Yanshan University, Ministry of Education of China, Qinhuangdao 066004, China
Guangling Zhou: Hebei Heavy Machinery Fluid Power Transmission and Control Lab, Yanshan University, Qinhuangdao 066004, China
Yalun Wang: Hebei Heavy Machinery Fluid Power Transmission and Control Lab, Yanshan University, Qinhuangdao 066004, China
Wei Gao: Hebei Heavy Machinery Fluid Power Transmission and Control Lab, Yanshan University, Qinhuangdao 066004, China
Xiangdong Kong: Key Laboratory of Advanced Forging & Stamping Technology and Science, Yanshan University, Ministry of Education of China, Qinhuangdao 066004, China

Energies, 2019, vol. 12, issue 7, 1-22

Abstract: To improve the power grid adaptability and low voltage ride-through (LVRT) capability of hydraulic wind turbines (HWT), an LVRT control method based on hierarchical control is proposed for the energy regulation of HWT. The method includes a top-level machine-controlled paddle, mid-level control based on variable motor swash plate angle, and an underlying control based on throttle opening. To achieve multivariable coordinated control of the HWT via the control process, the minimum wind, maximum inertial energy storage, and minimum energy consumption of the throttle valve of the wind turbine are optimized. The multiobjective control law is computed by a quadratic programming algorithm, and the optimal control law is obtained. The multitarget control strategy is simulated and analyzed by AMESim14 and MATLAB/Simulink R2014a software, and the control law is verified by a semiphysical test platform of an HWT. The results show that the proposed control method can effectively reduce the residual energy of the HWT during LVRT, reduce the impact on the generator, and improve the adaptability of the HWT.

Keywords: wind power generation; hierarchical control; LVRT (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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