An Improved Hydraulic Energy Storage Wave Power-Generation System Based on QPR Control

Zhigang Liu, Wei Huang, Shi Liu, Xiaomei Wu, Chun Sing Lai () and Yi Yang
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Zhigang Liu: China Southern Power Grid Technology Co., Ltd., Guangzhou 510060, China
Wei Huang: Department of Electrical Engineering, School of Automation, Guangdong University of Technology, Guangzhou 510006, China
Shi Liu: China Southern Power Grid Technology Co., Ltd., Guangzhou 510060, China
Xiaomei Wu: Department of Electrical Engineering, School of Automation, Guangdong University of Technology, Guangzhou 510006, China
Chun Sing Lai: Department of Electrical Engineering, School of Automation, Guangdong University of Technology, Guangzhou 510006, China
Yi Yang: China Southern Power Grid Technology Co., Ltd., Guangzhou 510060, China

Energies, 2023, vol. 16, issue 2, 1-18

Abstract: According to the inherent characteristics of the hydraulic power take-off (PTO) system, the output power of a generator tends to be intermittent when the wave is random. Therefore, this paper aims to improve the effective utilization of wave energy and reduce power intermittency by constructing a topology with two branches to transmit electrical energy. Firstly, the wave-to-wire (W2W) model of the system is constructed. Secondly, the W2W model is simulated by using synovial and quasi-proportional resonance (QPR) control with regular and irregular incident waves, and the results of PI control are compared. Then, the control strategy in simulation is verified by experiments. The simulation and experimental results show that the control strategy has better performance, and the stability of the system output power is greatly improved.

Keywords: wave power-generation system; hydraulic PTO; W2W models; QPR control (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: 2023
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