Control of a hydraulic wind power transfer system under disturbances

Vaezi, Masoud; Izadian, Afshin

doi:10.1109/icrera.2014.7016512

Cited by 10 publications

(8 citation statements)

References 22 publications

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“…This energy consumption evaluation criterion of compressed air has been formulated as a National Standard of China (GB/T 30833-2014). According to the references [16][17][18], the air power of compressed air is expressed as:…”

Section: Power Of Pneumatic Systemmentioning

confidence: 99%

“…Moreover, through the analysis of the dimensionless model and reference values, the influences of independent parameters on the dynamic characteristics of the HP transformer can be obtained. In addition, that is significant to grasp the essential characteristics of the HP transformer [17].…”

Section: Dimensionless Modelling Of Hp Transformermentioning

confidence: 99%

“…A/D PC According to previous study [17], because the temperature of the compressed air is almost same as the atmospheric temperature, so the influence of the temperature on the working characteristics of a pneumatic booster can be neglected. As the structure and working principle of the pneumatic booster like the structure and working principle of the HP transformer, in this study, the working process of the HP transformer is considered to be an isothermal process.…”

Section: Experimental Verification Of the Mathematical Modelmentioning

confidence: 99%

“…In simulation and experimental study on the HP transformer, the values of the dimensionless area of the hydraulic chamber and dimensionless output oil pressure were set to 0.25 and 2.92. As the output pressure of the HP transformer can be acquired with a pressure sensor, which is more According to previous study [17], because the temperature of the compressed air is almost same as the atmospheric temperature, so the influence of the temperature on the working characteristics of a pneumatic booster can be neglected. As the structure and working principle of the pneumatic booster like the structure and working principle of the HP transformer, in this study, the working process of the HP transformer is considered to be an isothermal process.…”

Section: Experimental Verification Of the Mathematical Modelmentioning

confidence: 99%

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Dimensionless Energy Conversion Characteristics of an Air-Powered Hydraulic Vehicle

2018

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Due to the advantages of resource conservation and less exhaust emissions, compressed air-powered vehicle has attracted more and more attention. To improve the power and efficiency of air-powered vehicle, an air-powered hydraulic vehicle was proposed. As the main part of the air-powered hydraulic vehicles, HP transformer (short for Hydropneumatic transformer) is used to convert the pneumatic power to higher hydraulic power. In this study, to illustrate the energy conversion characteristics of air-powered hydraulic vehicle, dimensionless mathematical model of the vehicle's working process was set up. Through experimental study on the vehicle, the dimensionless model was verified. Through simulation study on the vehicle, the following can be obtained: firstly, the increase of the hydraulic chamber orifice and the area ratio of the pistons can lead to a higher output power, while output pressure is just the opposite. Moreover, the increase of the output pressure and the aperture of the hydraulic chamber can lead to a higher efficiency, while area ratio of the pistons played the opposite role. This research can be referred to in the performance and design optimization of the HP transformers.presented. Furthermore, the mathematic model of the HP transformer was built. By selecting the appropriate parameter values, a dimensionless model was set up. To confirm the dimensionless mathematic model, an archetype was built and studied. Moreover, the output characteristics of the HP transformer can be studied through simulation study. Finally, the influence of the key parameters was showed to get the most suitable value. Structure of the Power System of the Air-Powered VehicleStructure of the power system of the air-powered vehicle was showed as Figure 1. From the diagram, we can easily get that the power system is primarily comprised by a compressed air tank, the HP transformer and a hydraulic motor. As the most important component of the system, the HP transformer consists of a pressure regulator, pneumatic and hydraulic chambers and an accumulator. Compressed air is stored in the air tank to provide the proper input pressure. The accumulator is used to accumulate and release energy [8,9].

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Section: Power Of Pneumatic Systemmentioning

confidence: 99%

Section: Dimensionless Modelling Of Hp Transformermentioning

confidence: 99%

Section: Experimental Verification Of the Mathematical Modelmentioning

confidence: 99%

Section: Experimental Verification Of the Mathematical Modelmentioning

confidence: 99%

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Dimensionless Energy Conversion Characteristics of an Air-Powered Hydraulic Vehicle

2018

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“…In 2016, Zhang et al [29] further optimized the control model and obtained a more accurate and efficient control system. In 2014, the Energy Systems and Power Electronics Laboratory of the Indiana University--Purdue University Indianapolis (IUPUI) in the US constructed a hydraulic wind power system model that can resist fluctuations of high and low wind speeds by adjusting the simplified second-order model parameters [30]. In 2015, experiments that considered the proportional valve were verified [31], although it remains in the theoretical verification stage because of the lack of a mature product.…”

Section: Development Of Hydraulic Wind Turbine Technologymentioning

confidence: 99%

Review of fluid and control technology of hydraulic wind turbines

et al. 2017

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This study examines the development of the fluid and control technology of hydraulic wind turbines. The current state of hydraulic wind turbines as a new technology is described, and its basic fluid model and typical control method are expounded by comparing various study results. Finally, the advantages of hydraulic wind turbines are enumerated. Hydraulic wind turbines are expected to become the main development direction of wind turbines.

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Research on a power smoothing control strategy for energy storage hydraulic wind turbines

Gao

Zhang

et al. 2022

Energy Science & Engineering

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To solve the problem of large output power fluctuations in wind turbines and improve grid adaptability, a hydraulic energy storage system is introduced in traditional hydraulic wind turbines. Based on the working principle of energy storage hydraulic wind turbines, an energy storage hydraulic wind turbine state space model is established, and the feedback linearization method is introduced to solve the multiplication nonlinear problem in the modeling process. The output power is taken as the control output, and the torque compensation controller is established with the feedback linearization method. The displacement of the variable displacement pump motor is controlled to realize hydraulic energy storage system energy charging and discharging, and the wind turbine output power smoothing control is realized with the fluctuating wind speed. The power smoothing control strategy is verified with the 24 kW energy storage hydraulic wind turbines semi-physical simulation experimental platform. The proposed control strategy lays the groundwork for the wide application of the energy storage hydraulic wind turbines.

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Control of a hydraulic wind power transfer system under disturbances

Cited by 10 publications

References 22 publications

Dimensionless Energy Conversion Characteristics of an Air-Powered Hydraulic Vehicle

Dimensionless Energy Conversion Characteristics of an Air-Powered Hydraulic Vehicle

Review of fluid and control technology of hydraulic wind turbines

Research on a power smoothing control strategy for energy storage hydraulic wind turbines

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