Searched for: subject:"voltage%5C+control"
(1 - 16 of 16)
document
Tyuryukanov, I. (author)
The vast size of a modern interconnected power grid precludes controlling and operating it as a single object. Subdividing a power grid into a number of internally coherent areas allows to cope with its inherent complexity and to enable more efficient control structures. This thesis focuses on discovering the power system structure to facilitate...
doctoral thesis 2020
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Urso, A. (author), Chen, Y. (author), Staszewski, R.B. (author), Dijkhuis, Johan F. (author), Stanzione, Stefano (author), Liu, Y. (author), Serdijn, W.A. (author), Babaie, M. (author)
In this paper, we propose a new scheme to directly power a 4.9-5.6GHz LC oscillator from a recursive switched-capacitor DC-DC converter. A finite-state machine is integrated to automatically adjust the conversion ratio and switching frequency of the converter such that its DC output voltage is within ±5% of the desired 1V across input voltage...
journal article 2020
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Perilla Guerra, A.D. (author), Papadakis, Stelios (author), Rueda, José L. (author), van der Meijden, M.A.M.M. (author), Palensky, P. (author), Gonzalez-Longatt, Francisco (author)
The decommissioning of synchronous generators, and their replacement by decoupled renewable power plants, has a significant impact on the transient stability performance of a power system. This paper concerns with an investigation of the degree of transient stability enhancement that can be achieved in power systems with high shares (e.g.,...
journal article 2020
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Hashemi, M. (author), Zhou, Lei (author), Shen, Y. (author), de Vreede, L.C.N. (author)
This article presents the first application of a digital-intensive intrinsically linear digitally controlled class-E technique in a Doherty configuration. By careful nonlinear segmentation and multiphase RF-clocking along with overdrive-voltage control and automatic duty-cycle correction, it is shown that even the nonlinearities related to...
journal article 2019
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Angevare, J.A. (author), Makinwa, K.A.A. (author)
This paper describes a compact resistor-based temperature sensor that has been realized in a 180-nm CMOS process. It occupies only 6800 μ m<sup>2</sup>, thanks to the use of a highly digital voltage-controlled oscillator (VCO)-based phase-domain sigma-delta modulator, whose loop filter consists of a compact digital counter. Despite its small...
journal article 2019
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Chen, Y. (author), Liu, Yao-Hong (author), Zong, Z. (author), Dijkhuis, Johan (author), Dolmans, Guido (author), Staszewski, R.B. (author), Babaie, M. (author)
In this paper, we propose a method to suppress supply pushing of an LC oscillator such that it may directly operate from a switched-mode dc-dc converter generating fairly large ripples. A ripple replication block (RRB) generates an amplified ripple replica at the gate terminal of the tail current source to stabilize the oscillator's tail...
journal article 2019
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Wu, Y. (author), Shekhar, A. (author), Soeiro, Thiago B. (author), Bauer, P. (author)
Back-To-Back (B2B) Voltage Source Converter (VSC) with AC-side LCL filters can be adopted for parallel AC-DC distribution links. In this paper, Grid-side Current Control (GCC) for the inner/fast control loops of the front- and backend power electronics are implemented in order to enhance the system performance against grid disturbances. Herein,...
conference paper 2019
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Tyuryukanov, I. (author), Popov, M. (author), van der Meijden, M.A.M.M. (author), Terzija, Vladimir (author)
This paper presents an integrated approach to partition similarity graphs, the task that arises in various contexts in power system studies. The approach is based on orthogonal transformation of row-normalized eigenvectors obtained from spectral clustering to closely fit the axes of the canonical coordinate system. We select the number of...
journal article 2018
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Pourmousavian, Naser (author), Kuo, Feng Wei (author), Siriburanon, Teerachot (author), Babaie, M. (author), Staszewski, R.B. (author)
This paper proposes an ultra-low-voltage (ULV) fractional-N all-digital PLL (ADPLL) powered from a single 0.5-V supply. While its digitally controlled oscillator (DCO) runs directly at 0.5 V, an internal switched-capacitor dc-dc converter ``doubles'' the supply voltage to all the digital circuitry and particularly regulates the time-to...
journal article 2018
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Sonmez, U. (author), Sebastiano, F. (author), Makinwa, K.A.A. (author)
An array of temperature sensors based on the thermal diffusivity (TD) of bulk silicon has been realized in a standard 40-nm CMOS process. In each TD sensor, a highly digital voltage-controlled oscillator-based Σ Δ ADC digitizes the temperature-dependent phase shift of an electrothermal filter (ETF). A phase calibration scheme is used to...
journal article 2017
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Ma, M. (author), Herdeiro Teixeira, A.M. (author), van den Berg, J. (author), Palensky, P. (author)
Low-voltage distribution grids experience a rising penetration of inverter-based, distributed generation. In order to not only contribute to but also solve voltage problems, these inverters are increasingly asked to participate in intelligent grid controls. Communicating inverters implement distributed voltage droop controls. The impact of...
journal article 2017
document
Kwok, K.C. (author)
This thesis investigates the system design and circuit implementation of a 24GHz-band short-range radar receiver in CMOS technology. The propagation and penetration properties of EM wave offer the possibility of non-contact based remote sensing and through-the-wall imaging of distance stationary or moving objects. The feasibility of realizing...
doctoral thesis 2015
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Teixeira Pinto, R. (author)
When large amounts of electricity need to be transported for long distances, or when underground or submarine cables are involved, using direct current high-voltage transmission systems is more efficient and cost effective than using traditional high-voltage alternating current transmission. Therefore, the main thesis objective is to study to...
doctoral thesis 2014
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Chan, W.L. (author), Long, J.R. (author)
journal article 2008
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Negenborn, R.R. (author), Beccuti, A.G. (author), Demiray, T. (author), Leirens, S. (author), Damm, G. (author), De Schutter, B. (author), Morari, M. (author)
Emergency voltage control problems in electric power networks have stimulated the interest for the implementation of online optimal control techniques. Briefly stated, voltage instability stems from the attempt of load dynamics to restore power consumption beyond the capability of the transmission and generation system. Typically, this situation...
conference paper 2007
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Morren, J. (author)
An increasing number of small Distributed Generation (DG) units are connected to the grid. The introduction of DG causes several problems, which are mainly related to the differences between DG units and conventional generators. Four problems have been considered in this thesis: damping of harmonics, voltage control, the behaviour of DG units...
doctoral thesis 2006
Searched for: subject:"voltage%5C+control"
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