Results 61 to 70 of about 5,882,681 (296)

Structural-and-Parametric Optimization of Automatic Control System for Power Units of 300 MW in Wide Range of Load Variations

open access: yesИзвестия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2019
The structural-parametric optimization of the automatic control system for power units (ACSPU) of 300 MW of Lukoml’skaya GRES (Lukoml Local Condensing Power Plant) in the mode of both the permanent and the variable superheated steam pressure upstream of ...
K. I. Artsiomenka
doaj   +1 more source

Frequency and Voltage Control of an Inverter-Based DG Using Adaptive Fuzzy-Sliding Mode Controller [PDF]

open access: yesJournal of Electrical and Computer Engineering Innovations, 2019
Background and Objectives: The microgrid voltage and frequency are strongly affected by active and reactive load fluctuations. Load change in microgrid may result in the lack of balance among generation and consumption and as a result change in output ...
E. Limuchi, A. Taher, B. Ganji
doaj   +1 more source

Frequency control circuit for all-digital phase-lock loops [PDF]

open access: yes, 1973
Phase-lock loop references all its operations to fixed high-frequency service clock operating at highest speed which digital circuits permit. Wide-range control circuit provides linear control of frequency of reference signal.
Anderson, T. O.
core   +1 more source

Distributed Secondary Frequency Control through MTDC Transmission Systems

open access: yes, 2015
In this paper, we present distributed controllers for sharing primary and secondary frequency control reserves for asynchronous AC transmission systems, which are connected through a multi-terminal HVDC grid.
Andersson, Göran   +4 more
core   +2 more sources

Pulmonary Dysfunction Is Associated With Sleep Study Abnormalities in Children With Sickle Cell Disease: A Multicenter Study

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Introduction Pulmonary dysfunction and sleep abnormalities are common in children with sickle cell disease (SCD) and are associated with worse clinical outcomes. Whether spirometry abnormalities are associated with polysomnography (PSG) findings remains unclear.
Ammar Saadoon Alishlash   +4 more
wiley   +1 more source

Energetic Factors of a Frequency-Controlled Synchronous Electric Drive

open access: yesИзвестия высших учебных заведений и энергетических объединенний СНГ: Энергетика, 2018
As compared to asynchronous frequency-controlled electric drives, synchronous drives are characterized by lower power losses, rigid mechanical characteristics without speed feedback and by the simplest law of frequency control (when the voltage changes ...
B. I. Firago, S. V. Aleksandrovsky
doaj   +1 more source

Gather-and-broadcast frequency control in power systems

open access: yes, 2016
We propose a novel frequency control approach in between centralized and distributed architectures, that is a continuous-time feedback control version of the dual decomposition optimization method.
Dörfler, Florian, Grammatico, Sergio
core   +1 more source

‘They Need to Hear You Say It’: Healthcare Professionals’ Perspectives on Barriers and Enablers to End‐of‐Life Discussions With Adolescents and Young Adults With Cancer

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT End‐of‐life conversations with adolescents and young adults (AYAs) with cancer rarely occur without the guidance of healthcare professionals. As a part of the ‘Difficult Discussions’ study, focused on palliative care and advance care planning discussions with AYAs with cancer, we investigated the factors that healthcare professionals identify ...
Justine Lee   +9 more
wiley   +1 more source

Frequency support scheme of grid‐forming based hybrid cascaded HVDC integrated wind farms

open access: yesIET Generation, Transmission & Distribution
The grid‐following control‐based hybrid cascaded high‐voltage direct current (HC‐HVDC) links may contribute to the worsening of inertia decline and instability issues, especially in situations characterized by a weak grid.
Xiaojie Fan, Yongning Chi, Zhibing Wang
doaj   +1 more source

Rigid-body motion extracted from total motion of a flexible body [PDF]

open access: yes, 1967
Control system eliminates or reduces flexibility effects on the manual and automatic control of large flexible vehicles. It extracts rigid-body and flexible-body motion and adapts well when a flexible-body frequency coincides or nearly coincides with the
Howard, J. C.
core   +1 more source

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