scholarly journals Characteristics and control strategies of large-scale residential air conditionings for demand response programs

2019 ◽  
Vol 9 (16) ◽  
pp. 3218 ◽  
Author(s):  
Qi Wang ◽  
Hongru Wang ◽  
Lei Zhu ◽  
Xingquan Wu ◽  
Yi Tang

Demand response (DR) is widely accepted as a feasible and potential solution to improve the operation of the power system. In this paper, an economical and practical DR system architecture based on internet and Internet of things (IoT) communication technologies is discussed to achieve wide-area DR control without using an expensive metering infrastructure. Multi agents are introduced with respective control strategies to implement multi-time-scale control in a power system. In order to support quick DR strategies, a novel smart terminal design for the proposed DR system is described with functions of local parameter detection and action. The practicality of the proposed system was validated on a developed hardware-in-loop co-simulation platform.


2013 ◽  
Author(s):  
P. Benoit ◽  
G. Rohbogner ◽  
S. Fey ◽  
D. George ◽  
J. Wüllner ◽  
...  

2017 ◽  
Vol 1 (2) ◽  
pp. 90 ◽  
Author(s):  
Michael D. Mitchell ◽  
Walter E. Beyeler ◽  
Patrick Finley ◽  
Melissa Finley DVM, PhD

<p><em>Peste des Petits Ruminants (PPR) is an infectious disease affecting goats and sheep. PPR has a mortality rate of 80% and a morbidity rate of 100% in naïve herds. This disease is currently of concern to Afghani goat and sheep herders as conditions in Afghanistan are conducive to the disease becoming an epidemic. PPR is similar to Rinderpest, but is not as well studied. There is a lack of empirical data on how the disease spreads or effective large-scale mitigation strategies. We developed a herd-level, event-driven model of PPR, using memoryless state transitions, to study how the virus propagates through a herd, and to identify effective control strategies for disparate herd configurations and environments. This model allows us to perform Sensitivity Analyses (SA) on environmental and disease parameters for which we do not have empirical data and to simulate the effectiveness of various control strategies. We find that reducing the amount of time from the identification of PPR in a herd to the vaccination of the herd will radically reduce the number of deaths that result from PPR. The goal of this model is to give policy makers a tool to develop effective containment strategies for managing outbreaks of PPR.</em></p>


Author(s):  
Froylan E. Sifuentes ◽  
Taylor Keep

Increasing penetration of intermittent renewable electricity into the grid, coupled with development of new communication and control strategies, is creating challenges and opportunities for demand response (DR) to balance the grid. This paper presents a model characterization of a controllable buildings Variable Air Volume HVAC (VAV HVAC) system capable of implementing control strategies that provide flexibility to the grid. A Model Predictive Controller (MPC) capable of reliably varying the modeled power by ±20%, or up to ±2 GW on a national scale, every five minutes without compromising occupants comfort was built. A climate analysis was performed in order to assess the availability of controllable resources in sixteen cities. It is found that this control strategy could be implemented up to 99% of the time in the hottest regions, but as low as 10% of the time in the coldest.


2013 ◽  
Vol 385-386 ◽  
pp. 759-767
Author(s):  
Zhen Liu ◽  
Hai Bo Gao ◽  
Zong Quan Deng

This article presents knowledge on the design of a large-scale Gravity Compensation System (GCS) for lunar rover. The system comprises a large-scale planar position servo system that covers an area of 900 square meters and a force servo system that generates compensation force. The major problems in system design are clearly identified so that the mechanisms and control strategies of the GCS could be better understood. Experiment results are also included to extend the knowledge on this system.


Author(s):  
Sameh Zenned ◽  
Emna Aridhi ◽  
Abdelkader Mami

The number of installations of Micro-Grid or intelligent micro power networks will increase to quadruple by 2020.The purpose is to reduce the cost and the consumption of electricity in transmission and distribution networks, using a hybrid system powered by solar and wind sources, as well as integrating storage devices. This paper reviews and discusses the Micro-Grid Model. It describes various Micro-Grid components and different configurations. It also presents the model of two generation units (Photovoltaic and Wind Turbine). Then, a comparative study of different battery types used for large-scale electricity storage is carried out, followed by a review of control strategies.


2020 ◽  
Vol 12 (10) ◽  
pp. 3951
Author(s):  
Helen K. Liu ◽  
Chung-Chi Lin ◽  
Li-Hsin Huang ◽  
Sin-An Huang ◽  
Rong-Nan Huang

Invasive alien species are one of the major threats to biological diversity, public safety, agriculture, and economics. In recent years, a new wave of the red imported fire ant (RIFA) has been detected in new regions, including Kobe (Japan), Daegu (South Korea), Kaohsiung (Taiwan), and other locations in southeast Asia. Due to the increasing number of invasions, practitioners and scientists are seeking effective strategies to respond to RIFA invasions in Pacific regions, especially in countries that have had no presence of RIFA. This study aims to identify the strategies adopted to eradicate RIFA in Taiwan and to elucidate some of the assumptions about RIFA prevention and treatment in infested areas with diverse land patterns. Through a literature review and examination of eradication cases in Taiwan, five essential eradication lessons are discussed: (1) Immediate action through partnership with universities and the private sector; (2) engagement with the public and community with an interest in RIFA control through technology; (3) establishment of multi-level horizontal networks of response teams; (4) strategy implementation ranging from large-scale prevention to precise treatment; and (5) adoption of technology and social media. These strategies will have implications and applications for east and south Asian countries that are dealing with similar challenges.


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