Results 61 to 70 of about 3,429,219 (105)
Some of the next articles are maybe not open access.
Minimally Supported Frequency Composite Dilation Wavelets
Journal of Fourier Analysis and Applications, 2009Recently, in response to the growing interest in oriented oscillatory waveforms, \textit{K. Guo, D. Labate, W.-Q. Lim, G. Weiss}, and \textit{E. Wilson} introduced a new class of representation systems called \textit{Affine Systems with Composite Dilations} [Electron. Res. Announc. Am. Math. Soc. 10, 78--87 (2004; Zbl 1066.42023); in: Harmonic analysis
openaire +1 more source
Optimal frequency support by dynamic demand
2013 IEEE Grenoble Conference, 2013A high penetration of renewable energy sources challenges future grid frequency control. Decentralized demand control can contribute to this frequency control. In this paper a method is proposed where residential demand is controlled to support the frequency.
S. Weckx, J. Driesen, R. D'hulst
openaire +1 more source
Frequency-Constrained Generation Expansion Planning with Frequency Support from Wind Farm
2020 IEEE/IAS Industrial and Commercial Power System Asia (I&CPS Asia), 2020With the increasing integration of renewable energy, the inertia of power systems evidently decreases and poses a critical challenge to planners. To guarantee the frequency stability of the system with high shares of renewable energy, this paper presents a novel multi-machine system frequency response (MSFR) model, which tends to additionally ...
Chengming Zhang +6 more
openaire +1 more source
Grid frequency support from inverter connected generation
2021 31st Australasian Universities Power Engineering Conference (AUPEC), 2021This paper presents a case study to demonstrate impact of current fleet of inverter connected generation (roof top photovoltaics and utility scale grid following inverters) that have been allowed to connect to power networks with no obligations to respond to system under frequency events.
Njabulo Mlilo, Tony Ahfock, Jason Brown
openaire +1 more source
Frequency Support of a Wind Power Plant For Over-Frequency Disturbances
2020 IEEE 4th Conference on Energy Internet and Energy System Integration (EI2), 2020This study addresses an improved frequency control strategy of a wind power plant for boosting the frequency control capability by using separate variable droop control characteristics when an over-frequency disturbance occurs. The test system embedded a wind power plant is employed to investigate the performance of the proposed frequency control ...
Dejian Yang +3 more
openaire +1 more source
Aggregation Frequency Response Modeling for Wind Farms with Frequency Support Capabilities
2019 IEEE Power & Energy Society General Meeting (PESGM), 2019The high penetration wind power will count towards a significant portion of future power grid. This significant role requires wind turbine generator (WTG) to contribute to primary frequency regulation support. Consequently, it is necessary to investigate the dynamic frequency response of wind farms. In this paper, an aggregated frequency response model
Jianfeng Dai, Yi Tang, Yurong Wang
openaire +1 more source
Natural Frequencies of Plate Supported Thermowells
Journal of Pressure Vessel Technology, 2015An idealized model of a welded-flange thermowell is used to establish the role of flange thickness in natural frequency estimates. It is found that for thermowell diameters comparable to flange thickness, the support compliance of the thermowell/flange interface approaches that expected for a semi-infinite support.
openaire +1 more source
Frequency Stabilization of a VCDRO by Microcontroller Supported Frequency Lock Loop
2007 8th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services, 2007The paper presents frequency stabilization of a VCDRO operating at 11 GHz by using a frequency lock loop supported by microcontroller. The signal from a PLL synthesizer is used as a reference signal in the FLL in order to obtain a signal with characteristics like one originating from a free- running VCDRO having, in the same time, stability close to a ...
Predrag Manojlovic +2 more
openaire +1 more source
Seismic Support: Speedy Determination of Frequency
Journal of the Structural Division, 1979Seismic restraints are provided to support safety-related electrical cable trays or conduits and HVAC ductwork in nuclear power plant structures. It is shown that most of these restraints, in the form of frames, can be represented by single-degree-of-freedom models for analysis and design. Approximate formulas, based on the stiffness of the SDOF models,
openaire +1 more source
A Cell-Based Wide-Frequency-Range DLL Supporting Fast Frequency Scaling
2019 17th IEEE International New Circuits and Systems Conference (NEWCAS), 2019In this paper, we present a cell-based wide-frequency-range DLL supporting clock frequencies from 10MHz to 1GHz in 90nm. To support fast locking (during frequency scaling), we present novel architecture with a socalled “fast-locking mode” - in which the control code for the Long-Range Delay Block (LRDB) can be quickly determined in a way that the ...
Wei Chu, Shi-Yu Huang
openaire +1 more source