Results 11 to 20 of about 56,466 (281)

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
doaj   +1 more source

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
doaj   +1 more source

Expander selection for an on board ORC energy recovery system [PDF]

, 2017
This paper deals with the comparison between volumetric expanders (screw, scroll and rotary vane) and an Inlet Forward Radial (IFR) micro turbine for the exploitation of an on board Organic Rankine Cycle (ORC) energy recovery system.
Capata, Roberto, Fabio, Pantano
core   +1 more source

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
doaj   +1 more source

Sensored and sensorless speed control methods for brushless doubly fed reluctance motors [PDF]

, 2009
The study considers aspects of scalar V/f control, vector control and direct torque (and flux) control (DTC) of the brushless doubly fed reluctance machine (BDFRM) as a promising cost-effective alternative to the existing technological solutions for ...
Abad, Abad, Abad, Arnalte, Bauer, Betz, Betz, Betz, Brassfield, Datta, Dorrell, Jovanović, Jovanović, Jovanović, Jovanović, Jovanović, Jovanović, Jovanović, Jovanović, Liang, Liao, Liao, Liao, Lorenz, M. Jovanovic, McMahon, Morel, Ojo, Poza, Roberts, Saifkhani, Schulz, Takahashi, Takahashi, Wallace, Wang, Williamson, Xu, Xu, Xu, Zhi   +40 more
core   +1 more source

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

Evaluation of flotation process course on the example of sulphide ores [PDF]

E3S Web of Conferences, 2017
The article concerns investigations over the influence of selected parameters of the flotation process course on the values of technological indices of beneficiation process assessment.
Oleksik Konrad, Saramak Daniel, MŁynarczykowska Anna   +2 more
doaj   +2 more sources

Recovery processes in a large offshore wind farm [PDF]

Wind Energy Science, 2021
Wind turbines in a wind farm extract energy from the atmospheric flow and convert it into electricity, resulting in a localized momentum deficit in the wake that reduces energy availability for downwind turbines.
T. Gupta, S. Baidya Roy
doaj   +1 more source