Ambient Temperature Impact on the Aggregated Demand Response Flexibility in Microgrids

Author(s):  
Maria Victoria Gasca ◽  
Maximiliano Bueno-Lopez ◽  
Federico Ibanez ◽  
David Pozo
2016 ◽  
Vol 128 ◽  
pp. 56-67 ◽  
Author(s):  
Fabiano Pallonetto ◽  
Simeon Oxizidis ◽  
Federico Milano ◽  
Donal Finn

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1378
Author(s):  
Ildar Daminov ◽  
Rémy Rigo-Mariani ◽  
Raphael Caire ◽  
Anton Prokhorov ◽  
Marie-Cécile Alvarez-Hérault

(1) Background: This paper proposes a strategy coupling Demand Response Program with Dynamic Thermal Rating to ensure a transformer reserve for the load connection. This solution is an alternative to expensive grid reinforcements. (2) Methods: The proposed methodology firstly considers the N-1 mode under strict assumptions on load and ambient temperature and then identifies critical periods of the year when transformer constraints are violated. For each critical period, the integrated management/sizing problem is solved in YALMIP to find the minimal Demand Response needed to ensure a load connection. However, due to the nonlinear thermal model of transformers, the optimization problem becomes intractable at long periods. To overcome this problem, a validated piece-wise linearization is applied here. (3) Results: It is possible to increase reserve margins significantly compared to conventional approaches. These high reserve margins could be achieved for relatively small Demand Response volumes. For instance, a reserve margin of 75% (of transformer nominal rating) can be ensured if only 1% of the annual energy is curtailed. Moreover, the maximal amplitude of Demand Response (in kW) should be activated only 2–3 h during a year. (4) Conclusions: Improvements for combining Demand Response with Dynamic Thermal Rating are suggested. Results could be used to develop consumer connection agreements with variable network access.


2018 ◽  
Vol 32 (11) ◽  
pp. 5179-5188 ◽  
Author(s):  
Stasys Steišūnas ◽  
Gintautas Bureika ◽  
Gediminas Vaičiūnas ◽  
Marijonas Bogdevičius ◽  
Olegas Lunys

Author(s):  
Kamil Jadu Ali ◽  
Ahmed Hasan Mohammad ◽  
Ghanim Thiab Hasan

<p><span>In this paper, the effect of the ambient temperature on the PV modules for different angles of inclinations and different intensities of the solar radiation on the surface of the PV module is considered by using empirical correlations for natural convection. An analytical model based on the energy balance equilibrium between the PV module and the environment conditions has been used. Also an expression for calculating the electric power of silicon PV modules in a function of the ambient temperature, the intensity of the solar radiation, the incident angle of the solar radiation to the surface of the PV module and the efficiency of the PV modules at STC conditions have been used. By comparing the obtained both results, it can be seen that the largest deviation between the power values obtained by the analytical model and expression is about (5 %). The results obtained indicates that in the case of a small number of PV modules corresponding to the required number for an average household, it is more economical to invest additional resources in increasing the PV module's surface area than in case of the PV module with sun tracking system. </span></p>


2010 ◽  
Vol 100 (2) ◽  
pp. 128-134 ◽  
Author(s):  
Matthew J. Paul ◽  
Christiana Tuthill ◽  
Alexander S. Kauffman ◽  
Irving Zucker

2020 ◽  
Vol 10 (12) ◽  
pp. 4371
Author(s):  
Radoje Vujadinović ◽  
Vladimir Pajković ◽  
Sreten Simović ◽  
Milanko Damjanović ◽  
Petar Nikčević

The steering system represents one of the most important systems of active safety in vehicles. The process of a steering system failure usually starts with the failure of its protective element (cuff). Numerous factors influence a cuff’s lifespan, but the research subject of this paper is the impact of ambient temperature. The goal of this research is the experimental verification of the finding that vehicles used in northern areas require more frequent interventions in their steering systems than vehicles used in the south. A simulator performing a motion similar to the work of a cuff during a vehicle’s motion was made for the purpose of the research. A refrigerating chamber where cuffs were tested at temperatures from −4 °C to −20 °C was also made. A numerical analysis, with the ANSYS software environment, was also carried out. The numerical analysis shows that the failure of a cuff could be expected at almost the same point at which it was experimentally proven. Therefore, the failure, namely the breaking of a cuff, is not only a consequence of the material’s fatigue due to a big number of oscillations, but it also depends upon the impact of ambient temperature where the vehicle is used.


2016 ◽  
Vol 15 (1) ◽  
Author(s):  
Qin Li ◽  
Yuming Guo ◽  
Dong-Mei Wei ◽  
Yi Song ◽  
Jie-Yun Song ◽  
...  

2015 ◽  
Vol 155 ◽  
pp. 79-90 ◽  
Author(s):  
R. D’hulst ◽  
W. Labeeuw ◽  
B. Beusen ◽  
S. Claessens ◽  
G. Deconinck ◽  
...  

2018 ◽  
Vol 9 (4) ◽  
pp. 3616-3627 ◽  
Author(s):  
Ke Wang ◽  
Rongxin Yin ◽  
Liangzhong Yao ◽  
Jianguo Yao ◽  
Taiyou Yong ◽  
...  

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