Results 21 to 30 of about 2,830,506 (267)

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

open access: yesIEEE 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   +4 more
openaire   +3 more sources

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

open access: yesEnergies, 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   +4 more
doaj   +1 more source

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

open access: yesEnergies, 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   +5 more
doaj   +1 more source

Multirobot Heterogeneous Control Considering Secondary Objectives [PDF]

open access: yesSensors, 2019
Cooperative robotics has considered tasks that are executed frequently, maintaining the shape and orientation of robotic systems when they fulfill a common objective, without taking advantage of the redundancy that the robotic group could present.
Julio F. Acosta   +3 more
openaire   +5 more sources

Secondary controlled motors in speed and torque control

open access: yesProceedings of the JFPS International Symposium on Fluid Power, 1993
This article deals with the control of variable displacement units connected to a constant pressure net. In particular the dynamical behaviour of two coupled secondary units in a speed- and torque control circuit is described and the decoupling of the two motors by the control technique is demonstrated.
BACKÉ, Wolfgang   +1 more
openaire   +3 more sources

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

open access: yesApplied 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   +4 more
doaj   +1 more source

The need for better control of secondary hyperparathyroidism [PDF]

open access: yesNephrology 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

Resilient distributed control of islanded microgrids under hybrid attacks

open access: yesFrontiers 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   +3 more
doaj   +1 more source

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

open access: yesIEEE 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   +3 more
doaj   +1 more source

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

open access: yesIEEE 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

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