Blockchain-based microgrid distributed power transaction model

2021 ◽  
Author(s):  
Zhenhua Yan ◽  
Chang Liu ◽  
Xuwei Xia ◽  
Yongliang Li ◽  
Bo Gao
Sensors ◽  
2021 ◽  
Vol 21 (13) ◽  
pp. 4533
Author(s):  
Sanguk Park ◽  
Keonhee Cho ◽  
Seunghwan Kim ◽  
Guwon Yoon ◽  
Myeong-in Choi ◽  
...  

Smart energy technologies, services, and business models are being developed to reduce energy consumption and emissions of CO2 and greenhouse gases and to build a sustainable environment. Renewable energy is being actively developed throughout the world, and many intelligent service models related to renewable energy are being proposed. One of the representative service models is the energy prosumer. Through energy trading, the demand for renewable energy and distributed power is efficiently managed, and insufficient energy is covered through energy transaction. Moreover, various incentives can be provided, such as reduced electricity bills. However, despite such a smart service, the energy prosumer model is difficult to expand into a practical business model for application in real life. This is because the production price of renewable energy is higher than that of the actual grid, and it is difficult to accurately set the selling price, restricting the formation of the actual market between sellers and consumers. To solve this problem, this paper proposes a small-scale energy transaction model between a seller and a buyer on a peer-to-peer (P2P) basis. This model employs a virtual prosumer management system that utilizes the existing grid and realizes the power system in real time without using an energy storage system (ESS). Thus, the profits of sellers and consumers of energy transactions are maximized with an improved return on investment (ROI), and an intelligent demand management system can be established.


Author(s):  
S. A. Mihailov ◽  
◽  
V. Ya. Gorjachev ◽  
T. Yu. Brostilova ◽  
S. A. Brostilov ◽  
...  

Author(s):  
Wang Jian ◽  
Wu Kuihua ◽  
Zhu Wenbing ◽  
Feng Liang ◽  
Zhang Xiaolei ◽  
...  

2021 ◽  
pp. 1356336X2110258
Author(s):  
Eli-Karin S Åsebø ◽  
Helga S Løvoll ◽  
Rune J Krumsvik

The purpose of this study is to explore students’ perceptions of visibility in physical education (PE) using a single cumulative case study approach. Data were generated from the descriptive field notes of seven participant observations ( n = 77), individual semi-structured interviews ( n = 13) and five focus group interviews ( n = 18) with ninth-grade students (ages 14–15 years) from three classes in a public lower secondary school in Norway. The findings show that students perceive visibility differently depending on the context; some students like being visible in PE, while others dread it. Perceptions change rapidly and are situation-specific, influenced by the lesson content, the way the teacher facilitates the lessons, self-perception shaped by past experiences, the presence, actions, and attitudes of fellow students, body pressure and societal body ideals. The findings actualise the relevance of the transaction model of stress and coping ( Lazarus and Folkman, 1984 ) in determining when visibility in PE is and is not perceived as stressful. Consequently, the organization of the PE environment benefits from these insights.


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