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Yalei Wang,Li Zeng,Jingying Lin,Xiaoqiong He 전력전자학회 2023 ICPE(ISPE)논문집 Vol.2023 No.-
This paper presents an improved droop control strategy for the advanced traction power supply system (ATPSS). First, we present the ATPSS, whose main feature is the elimination of the neutral sections, which connects the entire AC traction network of the traction power supply system. We also analyze the characteristics of this system compared with other isolated grids. Fluctuations in load position will lead to frequency deviation and power coordination problems. Then, an improved droop control strategy for frequency recovery and reactive power optimization based on multilevel control is proposed. Frequency and reactive power correction signals are sent from the central controller to each traction substation. To reduce line loss, a minimum line loss curve is obtained based on the relationship between active power and line loss, and the active power distribution is adjusted by secondary control. Finally, simulation and experimental results are given to validate the proposed control strategy, which optimizes power coordination, recover system frequency, and reduce line loss.
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( Ye Yuan ),( Xiangbai Zhang ),( Zhaohui Han ),( Jingying Lin ),( Qiwei Yang ) 아시아스포츠융합과학회 2022 Asia Pacific Journal of Applied Sport Sciences Vol.3 No.2
PURPOSE The main objective of this study was to validate the structural equation model of customer risk perception, satisfaction, and behavioral intention at Shenyang trampoline theme park. METHOD Study subjects included participants at six trampoline subject parks in Shenyang City. In this study, 312 questionnaires were distributed, 31 invalid questionnaires were removed for reasons such as being incomplete or incorrect. A total of 281 questionnaires were collected and used for analyses performed using SPSS 2.4 and Amos for hypothesis testing. Collected data was analyzed by descriptive statistics, exploratory factor analysis, confirmatory factor analysis, and structural equation modeling methods. RESULT Study results found (1) risk prevention had a direct effect on revisit intention and recommendation intention, and (2) the relationship between risk prevention and behavioral intention was moderated by satisfaction. CONCLUSION These findings confirm the importance of risk prevention, satisfaction and behavioral intentions in the recreational sport industry, which relevant management organizers should focus on and make practical efforts from multiple foundational aspects such as facilities, management, funding, It is expected that this study will contribute to the development of sport leisure industry. At the same time, this study also has limitations. Firstly, the study sample was only from Shenyang City and may not be representative of the rest of China. Samples could be collected in more regions in the future to improve the validity of the model. Secondly, only satisfaction was used as a mediator, and it is suggested that other variables could be added as mediating variables through questionnaires and a SPSS analysis to better explore the relationship between risk prevention, satisfaction, and behavioral intentions.
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