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Keywords = adjustable speed generator (ASG)

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13 pages, 5050 KiB  
Article
Cooperative Frequency Control of a Small-Scale Power System between Diesel Engine Driven Adjustable Speed Generator and Battery
by Rion Takahashi, Atsushi Umemura and Junji Tamura
Appl. Sci. 2020, 10(24), 9085; https://doi.org/10.3390/app10249085 - 18 Dec 2020
Cited by 3 | Viewed by 2415
Abstract
This paper proposes the application of an adjustable speed diesel engine-driven power plant employing a doubly-fed induction generator to an isolated small-scale power system including renewable power sources. This type of power plant can contribute to fast and flexible power balancing regulation under [...] Read more.
This paper proposes the application of an adjustable speed diesel engine-driven power plant employing a doubly-fed induction generator to an isolated small-scale power system including renewable power sources. This type of power plant can contribute to fast and flexible power balancing regulation under vacillating power supply such as wind, solar and other renewable power sources. Installation of a battery system is also considered, which can assist in coordinating the power plant to augment renewable power sources in the isolated power system. Full article
(This article belongs to the Special Issue Wind Generators: Technology and Trends)
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16 pages, 34350 KiB  
Article
Enhancement of Power System Transient Stability by the Coordinated Control between an Adjustable Speed Pumping Generator and Battery
by Junji Tamura, Atsushi Umemura, Rion Takahashi, Atsushi Sakahara, Fumihito Tosaka and Ryosuke Nakamoto
Appl. Sci. 2020, 10(24), 9034; https://doi.org/10.3390/app10249034 - 17 Dec 2020
Cited by 2 | Viewed by 2179
Abstract
The penetration level of large-scale wind farms into power systems has been increasing significantly, and the frequency stability and transient stability of the power systems during and after a network fault can be negatively affected. This paper proposes a new control method to [...] Read more.
The penetration level of large-scale wind farms into power systems has been increasing significantly, and the frequency stability and transient stability of the power systems during and after a network fault can be negatively affected. This paper proposes a new control method to improve the stability of power systems that are composed of large wind farms, as well as usual synchronous generators. The new method is a coordinated controlling method between an adjustable-speed pumping generator (ASG) and a battery. The coordinated system is designed to improve power system stability during a disconnection in a fixed-rotor-speed wind turbine with a squirrel cage-type induction generator (FSWT-SCIG)-based wind farm due to a network fault, in which a battery first responds quickly to the system frequency deviation due to a grid fault and improves the frequency nadir, and then the ASG starts to supply compensatory power to recover the grid frequency to the rated frequency. The performance of the proposed system was confirmed through simulation studies on a power system model consisting of usual synchronous generators (SGs), an ASG, a battery, and an SCIG-based wind farm. Simulation results demonstrated that the proposed control system can enhance the stability of the power system effectively. Full article
(This article belongs to the Special Issue Wind Generators: Technology and Trends)
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