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21 results on '"Yagami, Masaki"'

7. Mitigation of Short-Term Wind Power Ramps through Forecast-Based Curtailment.

Author

Probst, Oliver, Minchala, Luis I., Muyeen, S. M., Tamura, Junji, Yagami, Masaki, Koiwa, Kenta, and Hazari, Rifat

Subjects
WIND power plants, WIND power, INDEPENDENT system operators, ELECTRIC power distribution grids, WIND measurement, WIND turbines, FARM mechanization
Abstract

Featured Application: The proposed innovation allows for a significant reduction of large drops in wind power by using only the self-regulating capabilities of a wind turbine or wind power plant, as well as upstream wind measurement instrumentation, which may already be present at the wind farm. As the penetration of renewable energy generation in electric grids becomes more substantial, its contribution to the variability of the net load becomes more noticeable. Particularly in small or weak grids, the rate at which the output power of a wind farm decreases may become a concern to grid operators. In the present work, a novel approach, called forecast-based curtailment (FBC), is shown to be able to self-mitigate downward ramps on short time scales at a very small energy penalty, compared to conventional mitigation schemes, such as flat curtailment or up-ramp limitations. FBC allows to achieve compliance with ramp limits imposed by system operators at a very small energy cost and modest additional upfront investments. [ABSTRACT FROM AUTHOR]

Published
2021
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13. Improvement of Power System Transient Stability by Superconducting Fault Current Limiter

Author

Yagami, Masaki, Shibata, Shinsuke, Murata, Toshiaki, Tamura, Junji, Yagami, Masaki, Shibata, Shinsuke, Murata, Toshiaki, and Tamura, Junji

Abstract

This paper presents the results of analyses of the effectiveness of a Superconducting Fault Current Limiter (SFCL) on improving power system transient stability and limiting the fault current in a two-machine-infinite bus system. In this study, the system model with two SFCLs installed at each generator terminal was used taking 3LG (three lines to ground) fault at 12 fault points into account. These analyses were performed using EMTP/ATP. It is concluded that the use of SFCL with shunt resistance value of about 1.0 pu is effective for all fault points for the improvement of power system transient stability and the limiting of fault current., application/pdf

Published
2002

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