Results 21 to 30 of about 2,941,160 (266)

Distributed Secondary Control in Microgrids Using Synchronous Condenser for Voltage and Frequency Support

Energies, 2022
A high share of distributed energy resources (DERs) in power distribution grids has posed many challenges for system operation and control. Microgrid (MG) application with different distributed control approaches for DERs has been drawn a lot of ...
Tung Lam Nguyen, Ha Thi Nguyen, Yu Wang, Osama A. Mohammed, Emmanouil Anagnostou   +4 more
doaj   +1 more source

A Finite-Time Robust Distributed Cooperative Secondary Control Protocol for Droop-Based Islanded AC Microgrids

Energies, 2021
In this research work, a resilient finite-time consensus-based distributed secondary control protocol is presented for droop-based distributed generating (DG) units of an islanded AC microgrid (MG).
Shafaat Ullah, Laiq Khan, Mohsin Jamil, Muhammad Jafar, Sidra Mumtaz, Saghir Ahmad   +5 more
doaj   +1 more source

Enhanced Distributed Non-Linear Voltage Regulation and Power Apportion Technique for an Islanded DC Microgrid

Applied Sciences, 2023
There is a growing focus on exploring direct current (DC) microgrids in traditional power grids. A key challenge in operating these microgrids is ensuring proper current distribution among converters.
Olanrewaju Lasabi, Andrew Swanson, Leigh Jarvis, Anuoluwapo Aluko, Matthew Brown   +4 more
doaj   +1 more source

The need for better control of secondary hyperparathyroidism [PDF]

Nephrology Dialysis Transplantation, 2004
Secondary hyperparathyroidism (SHPT), a frequent complication of chronic kidney disease, develops in response to an imbalance in the serum levels of calcium, phosphorus and vitamin D as a result of altered metabolism. Raised serum levels of parathyroid hormone (PTH) and calcium-phosphorus product have a major effect on morbidity and mortality in ...
openaire   +3 more sources

Secondary Switched Control With no Communications for Islanded Microgrids [PDF]

IEEE Transactions on Industrial Electronics, 2017
Flexibility and reliability of AC microgrids are enhanced by reducing the dependence on communications in multi-layer hierarchical control. In this sense, this paper presents a secondary control with no communications for islanded microgrids. It is based on a control scheme that switches between two configurations according to a time-dependent protocol.
Rey, Juan M, Martí Colom, Pau, Velasco García, Manel, Miret Tomàs, Jaume, Castilla Fernández, Miguel   +4 more
openaire   +3 more sources

Control of a Single-Phase Islanded Microgrid Based on Virtual Oscillator Control Enhanced With Power Limitation and Robust Distributed Secondary Control

IEEE Open Journal of the Industrial Electronics Society
Virtual oscillator control (VOC) has emerged as an alternative solution for controlling parallel connected inverters in microgrids (MGs) due to its self-synchronization and advanced control capabilities.
Ronald Musona, Ioan Serban
doaj   +1 more source

Resilient distributed control of islanded microgrids under hybrid attacks

Frontiers in Energy Research, 2023
In this paper, a resilient control strategy is proposed to improve the stability of frequency and voltage recovery for the islanded microgrid (MG) under hybrid cyber attacks.
Yao Liu, Zhaobin Du, Yan Chen, Haoqin Zhan   +3 more
doaj   +1 more source

Ovarian Sex Cord Stromal Tumors in Children and Adolescents—The European Standard Clinical Practice Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT As part of the European Cooperative Study Group for Paediatric Rare Tumours initiative, we developed standard clinical practice guidelines for ovarian sex cord stromal tumors, based on comprehensive national and international cohort analyses, literature review, and a final expert consensus conference.
Dominik T. Schneider, Kris‐Ann Schultz, Nora Schnitzler, Michael Abele, Tal Ben‐Ami, Ewa Bien, Gianni Bisogno, Ines B. Brecht, Maja Cesen, Andrea Ferrari, Michaela Kuhlen, Malgorzata A. Krawczyk, Ricardo Lopez‐Almaraz, Yves Reguerre, Calogero Virgone, Daniel Orbach   +15 more
wiley   +1 more source

Research on Optimal Control of Excavator Negative Control System Based on Secondary Controllable Main Valve

IEEE Access, 2022
In order to optimize the energy efficiency and action coordination of negative control excavators, a secondary control circuit of main valve is proposed, which sets an electric proportional pressure reducing valve between joystick-pilot valve and main ...
Wenbo Fu, Xiaoming Yuan, Yongquan Li, Lijie Zhang   +3 more
doaj   +1 more source

Bridging the Loneliness Gap: Depression, Connectivity, and Isolation in Pediatric Oncology Patients and Their Peers

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Loneliness is associated with adverse physical and mental health outcomes and remains understudied in children and adolescents undergoing cancer therapy. Pediatric oncology patients may be at increased risk due to medical isolation and disruption of social networks.
Charlotte N. Stahlfeld, Scott H. Maurer, Michelle D. Watkinson, John Nury, Elise Barberis, Molly C. Mack   +5 more
wiley   +1 more source