Results 21 to 30 of about 1,283,393 (314)
New Synthetic Inertia Control for Wind Energy Conversion System
IEEE Access, 2023 Participation of modern variable-speed wind turbine generators in system frequency support has gained much attention from various transmission system operators to increase renewable technology hosting capacity in their power networks.
Sherif Fathallah +3 more
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Hydraulic performance characterisation of variable rate irrigation technology [PDF]
, 2021 Variable-rate irrigation (VRI) technology for centre pivots and lateral moves has been commercially available for over three decades, but its uptake has been limited, with growers citing additional capital and operating costs, the detrimental impact on ...
Msibi, Sandile Trevor
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Estimation of Time-varying Frequency and its Rate of Change in Low-inertia Power Systems [PDF]
, 2021 In this paper, a hierarchical estimation scheme is designed to track the frequency and its rate of change of non-stationary power signals. The frequency is retrieved by a kernel-based parameter estimator in the first step.
Li, P, Wu, A, Chu, Z, Teng, F, Chen, B
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RoCoF Droop Control of PMSG-Based Wind Turbines for System Inertia Response Rapidly
IEEE Access, 2020 This paper proposes a RoCoF droop control, which relieves the transient frequency change process by controlling the energy of the DC side capacitor. Firstly, analyze and classify the control time scale of the wind power system (WPS).
Wu Binbing +3 more
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Advances in Electrical and Electronic Engineering, 2022 Microgrids are able to dispatch power to distribution systems with the advancement of power electronics-based inverters. As per IEEE-1547-2018 standards, Microgrid has to maintain voltage of 0.88 < V < 1.1 p.u (per unit) and frequency of 58.8< f_0 < 61.2
Bangar Raju Lingampalli +1 more
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Rate of change of frequency under line contingencies in high voltage electric power networks with uncertainties [PDF]
, 2019 In modern electric power networks with fast evolving operational conditions, assessing the impact of contingencies is becoming more and more crucial.
Jacquod, Philippe +5 more
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Requirements and Test Conditions for Reliable Rate-of-Change-of-Frequency Measurements [PDF]
2019 IEEE 10th International Workshop on Applied Measurements for Power Systems (AMPS), 2019 Power system frequency and rate-of-change-of-frequency (ROCOF) are increasingly important metrics for system control, protection and load management. However, the varying standardization requirements on ROCOF measurements reflect the difficulty in achieving accuracy in the measurement of this parameter.
Gert Rietveld +2 more
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IEEE Open Access Journal of Power and Energy, 2020 The recent power cut incident in the UK on 9th August 2019 indicated that frequency control to raise frequency nadir and eliminate frequency second dip is highly desirable for power grids with high penetration of wind energy.
Xianxian Zhao, Ying Xue, Xiao-Ping Zhang
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Estimates and bounds on the rate and extent of allele frequency change [PDF]
Heredity, 1992 Two approximations are provided to the frequency of an autosomal allele after any number of generations of selection and, conversely, to the number of generations required for any given frequency change. These estimates are accurate over a wide range of selection coefficients and initial conditions, and have the added advantage of providing strict ...
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Energies, 2021 The recent developments in renewable energy have led to a higher proportion of converter-connected power generation sources in the grid. Operating a high renewable energy penetration power system and ensuring the frequency stability could be challenging ...
Feng Guo, David Schlipf
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