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Building Mathematical Model of Campus through Measurement Data
Kashihara, Hironori,Taoka, Hisao,Matsuki, Junya,Kawasaki, Shoji,Matsuura, Kousuke,Funabashi, Toshihisa The Korean Institute of Electrical Engineers 2012 The Journal of International Council on Electrical Vol.2 No.2
In this paper, we proposed the mathematical model of campus by measurement data and theoretical approach. We measure dynamic characteristic and static characteristic of load in a system. Power capacitors in the university are assumed to be electric power customer's load. The load model is presumed by combining them and the linear model calculated theoretically. The line voltage and the line current are measured, and we calculate the line load capacity in distribution system of campus. The load fluctuation of distribution system during a day is observed. The load will be modelized by evaluating a lot of data. We can forecast the demand of electric power by few information that is the load model and the measurement data of receiving end.
The Development of a Power System of the Combination of Diesel Generator and UPS
Dawei Qiu,Satoshi Uda,Hironori Kashihara,Yuki Fukuda,Naoya Okazaki,Shoji Nishimura,Yoshinori Kawasaki 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
This paper shows the development of a power supply system to solve the anomalous voltage sag, power failure and peak cut demand. This power supply system includes an UPS (Uninterruptible Power Supply), a standby generator and a Hybrid Switch, which is the integration of mechanical switches and IGBTs with good performance of low conducting loss and fast opening time. The results of a real-time simulation demonstrate its voltage compensation can perform within 2 ms response time when power failure occurs and transfer without voltage down between micro grid operation and gird-connected operation. Also, they are successfully validated by using a prototype system.