A rotational speed recovery strategy for wind turbines considering secondary frequency drops [PDF]
Zhejiang dianliWind turbines can contribute to frequency regulation by releasing rotor kinetic energy， which is an effective way to ensure frequency stability in power systems with high wind power penetration.
LYU Zhenhua +4 more
doaj +2 more sources
Simulation of the operating characteristics of an all-metal conical screw pump [PDF]
Scientific ReportsThe all-metal conical screw pump can achieve efficient lifting of fluids with different viscosities by adjusting the stator-rotor clearance fit. To investigate the operational characteristics of the all-metal conical screw pump under various fluid ...
Tong Wu +3 more
doaj +2 more sources
Research on Rotational Resistance Moment of Rotary Energy Recovery Device [PDF]
E3S Web of Conferences, 2018 The effects of operational conditions on the resistance moment of a rotary energy recovery device have been systematically investigated through the computational fluid dynamics in this paper.
GUO Ang +5 more
doaj +4 more sources
Critical Speed Analysis of Fibre Reinforced Composite Rotor Embedded with Shape Memory Alloy Wires [PDF]
International Journal of Rotating Machinery, 2000 In the present analysis, the fundamental natural frequency of a Jeffcott and a two-mass rotor with fibre reinforced composite shaft embedded with shape memory alloy (SMA) wires is evaluated by Rayleigh's procedure.
K. Gupta
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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 [PDF]
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 +4 more
doaj +2 more sources
Design and Implementation of Predictive Controllers for a 36-Slot 12-Pole Outer-Rotor SPMSM/SPMSG System with Energy Recovery [PDF]
Energies, 2023 This paper investigates a drive system with energy recovery which uses a 3-phase 1-kW 36-slot 12-pole distributed winding outer-rotor surface-mounted permanent-magnet synchronous motor (SPMSM) and surface-mounted permanent-magnet synchronous generator ...
Tian‐Hua Liu +2 more
semanticscholar +2 more sources
Chinese Journal of Aeronautics, 2020 In order to compensate for the disturbance of wide variation in rotor demanded torque on power turbine speed and realize the fast response control of turboshaft engine during variable rotor speed, a cascade PID control method based on the acceleration ...
Yong Wang +3 more
exaly +2 more sources
Impact Mechanisms of Commutation Failure Caused by a Sending-End AC Fault and Its Recovery Speed on Transient Stability [PDF]
Electronics, 2023 A sending-end AC fault may lead to commutation failure (CF) in a line-commutated converter high-voltage direct current (LCC-HVDC) system. In this paper, a theoretical analysis of the impact mechanisms of a CF and its recovery speed on the transient ...
Yifeng Lin +3 more
semanticscholar +2 more sources
Dynamic interaction of inflow and rotor time scales and impact on single turbine wake recovery [PDF]
Journal of Physics: Conference SeriesThe entrainment and recovery of wind turbine wakes are highly dependent on atmospheric inflow conditions, which has typically been quantified through the turbulent intensity.
S. J. Andersen +2 more
semanticscholar +2 more sources
Performance and Wake Characterization of a Model Hydrokinetic Turbine: The Reference Model 1 (RM1) Dual Rotor Tidal Energy Converter [PDF]
Energies, 2020 The mechanical power and wake flow field of a 1:40 scale model of the US Department of Energy’s Reference Model 1 (RM1) dual rotor tidal energy converter are characterized in an open-channel flume to evaluate power performance and wake flow recovery. The
Craig Hill +3 more
doaj +2 more sources