Review of the application of hydraulic technology in wind turbine

Abstract

With the development of large-scale wind power generation and offshore wind energy, reducing the nacelle weight and the gear failure rate is increasingly important.Hydraulic transmission is characterized by its flexible layout and transmits large energy with small volume and weight, which suits the demands of wind power generation. In this paper, a thorough review of hydraulic technology application in wind energy is carried out, in the aspect of pitch, brake, yaw, transmission, new applications, and the potential problems. K E Y W O R D S hydraulic brake, hydraulic pitch, hydraulic transmission, hydraulic yaw, new applications, wind energy 1 | INTRODUCTIONHydraulic transmission applied to wind energy is not a new concept, and early works by JERICO 1 showed that a lack of component availability is the main factor hindering its implementation. Some commercial wind turbines are equipped with hydraulic pitch or yaw mechanism, but after several years, oil leakages affected the turbine exterior and the control performance forcing the reuse of electrical systems. With the development of hydraulic components and the growing size of wind power generation, hydraulic technology has gradually been applied in wind energy, such as the hydraulic pitch system 2 listed in Table 1, the hydraulic braking system, 3 and hydraulic transmission system 4,5 depicted in Table 2. With the development of hydraulic components and offshore wind energy (which has been estimated by the MAKE to be a 3.9GW grid capacity in 2018), hydraulic wind turbine will find its new development.In this paper, an overall review of the hydraulic technology applied in wind energy, including the hydraulic structure and the corresponding control strategy, is carried out. The article is structured as follows: In the first section, hydraulic technology and wind energy basic situation are mainly introduced, especially their potential binding points. In the second section, the hydraulic application in the pitch, brake, yaw, transmission between the rotor and the generator, and other novel application are mainly described. In the third section, a review about the hydraulic components studied specially for wind energy is made. In the fourth section, the deficiency and advantage of hydraulic energy applied in wind energy and the application prospect are discussed.

Integration of Wind Energy and Desalination Systems: A Review Study

“…In these cases, the fluid is pressurised directly there, and act as a energy transfer medium. A description of several type of rotor-pump connections in wind turbines with hydraulic transmission system was presented in Chen et al [84].…”

Interpretation of wind turbine performance decline with age based on SCADA data analysis

“…The innovative results of this study indicate that the information related to the hydraulic pitch system [13] is particularly useful in order to interpret wind turbine performance. In particular, the underperformance of one selected test case is observed to be associated to a decrease of the pitch manifold block pressure.…”

Remote Monitoring and Fault Diagnosis of Ocean Current Energy Hydraulic Transmission and Control Power Generation System

“…At present, the main technologies of sea current energy generation include permanent magnet synchronous generation [6], double-fed asynchronous generation [7], and hydraulic transmission and control generation. Among these technologies, permanent magnet synchronous generation and double-fed asynchronous generation are more mature and have been used in practice and hydraulic transmission is characterized by its flexible layout [8]. Hydraulic transmission control power generation is a relatively new field, but has been the subject of a gradual increase in attention and research interest in the field of new energy generation due to the unique advantages of the hydraulic system compared with other transmission systems.…”

“…Energies 2021, 14, x FOR PEER REVIEW 2 of 20 flexible layout [8]. Hydraulic transmission control power generation is a relatively new field, but has been the subject of a gradual increase in attention and research interest in the field of new energy generation due to the unique advantages of the hydraulic system compared with other transmission systems.…”