Results 11 to 20 of about 9,739 (121)

Numerical Simulation of Compressor Stall Recovery Control

Shanghai Jiaotong Daxue xuebao, 2021
In order to explore the influencing factors of the effectiveness and stability for stall recovery and its flow mechanism when the antisurge valve is opened quickly, the dynamic stall recovery processes are simulated and the recovery processes at ...
GAO Yuan, WU Yadong, OUYANG Hua
doaj   +1 more source

Experimental Study on the Effect of the Blade Tip Distance on the Power and the Wake Recovery with Small Multi-Rotor Wind Turbines

Journal of Marine Science and Engineering, 2023
In order to investigate the output power and wake velocity of small multi-rotor wind turbines compared to single-rotor wind turbines, which operate in the same swept area at various blade tip distances, this paper used the wind tunnel test method to ...
Sen Gong, Kai Pan, Hua Yang, Junwei Yang
doaj   +1 more source

An adaptive droop control strategy with smooth rotor speed recovery capability for type III wind turbine generators

International Journal of Electrical Power & Energy Systems, 2022
Abstract This paper presents an adaptive droop control scheme with smooth rotor speed recovery capability for doubly-fed induction generators (DFIGs, type III wind turbine generators) to improve the frequency nadir, minimize the second drop in the frequency, and regulate the time to meet the MPPT curve. To this end, an adaptive droop gain that decays
Dejian Yang, Zhaoyang Jin, Taiying Zheng, Enshu Jin   +3 more
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Multi-Timescale Control of Variable-Speed Wind Turbine for Inertia Provision

Applied Sciences, 2022
The increasing deployment of power converters has led to a significant reduction in the power system inertia and consequently resulted in frequency stability issues.
Zixiao Xu, Yang Qi, Weilin Li, Yongheng Yang   +3 more
doaj   +1 more source

Fast Frequency Response of a Doubly-Fed Induction Generator for System Inertia Support

Applied Sciences, 2020
Converter-interfaced doubly-fed induction generators (DFIGs) can provide short-term frequency support (STFS) capability by releasing rotating kinetic energy.
Dejian Yang, Hong-Chao Gao, Lei Zhang, Jingjiao Li, Xinsong Zhang, Liang Hua   +5 more
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Research on primary frequency regulation strategies for ancillary wind power inertia based on the rotor kinetic energy

Frontiers in Energy Research, 2023
The additional frequency control of wind turbines is an effective method to solve the problem of low inertia in power systems with high proportions of new energy.
Li Sun, Peihong Yang, Hui Jiang, Yanfang Xu, Lan Kang, Xiuyan Lu   +5 more
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Aerodynamic Performance and Wake Characteristics Analysis of Archimedes Spiral Wind Turbine Rotors with Different Blade Angle

Energies, 2022
Continuous improvement of wind turbines represent an effective way of achieving green energy and reducing dependence on fossil fuel. Conventional lift-type horizontal axis wind turbines, which are widely used, are designed to run under high wind speed to
Ke Song, Huiting Huan, Yuchi Kang
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Speed Tracking for IFOC Induction Motor Speed Control Using Hybrid Sensorless Speed Estimator Based on Flux Error for Electric Vehicles Application

Machines, 2022
This paper presents hybrid sensorless speed tracking by an indirect field-oriented control (IFOC) for an induction motor (IM). The sensorless model is based on an improved virtual estimation topology model to predict the virtual speed and flux of the IM ...
Muhamad Syazmie Sepeeh, Shamsul Aizam Zulkifli, Sy Yi Sim, Huang-Jen Chiu, Mohd Zamri Che Wanik   +4 more
doaj   +1 more source

Experimental Study of a Reference Model Vertical-Axis Cross-Flow Turbine. [PDF]

PLoS ONE, 2016
The mechanical power, total rotor drag, and near-wake velocity of a 1:6 scale model (1.075 m diameter) of the US Department of Energy's Reference Model vertical-axis cross-flow turbine were measured experimentally in a towing tank, to provide a ...
Peter Bachant, Martin Wosnik, Budi Gunawan, Vincent S Neary   +3 more
doaj   +1 more source

Short-Term Frequency Response of a DFIG-Based Wind Turbine Generator for Rapid Frequency Stabilization

Energies, 2017
This paper proposes a short-term frequency-response scheme of a doubly-fed induction generator (DFIG)-based wind turbine generator (WTG) for improving rotor speed recovery and frequency nadir.
Dejian Yang, Moses Kang, Eduard Muljadi, Wenzhong Gao, Junhee Hong, Jaeseok Choi, Yong Cheol Kang   +6 more
doaj   +1 more source