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This paper presents a control strategy of a micro-wind turbine system (WTS) in AC MicroGrid (MG) with the capability of providing ancillary services to the MG and participating to its regulation. The WTSs can be controlled to operate at their maximum efficiency or as controllable source by tracking a power reference set by the energy management system. Hence, the active control of micro-wind turbine...
Microgrids (MGs) and Distributed Generation are becoming a significant area of research because of their peculiar distinctiveness. Microgrids are composed of generating sources which can be renewable, placed near the customer side. Also, they have the intrinsic property of islanding i.e. the disconnection of either the MG from the main grid or a part of the MG from the rest of the MG. In this paper,...
There has been a keen interest on Distributed Generation (DG) due to their restricted goals of meeting local loads and improving reliability of the overall system. Microgrids (MGs) are connected to the main grid through a Point of Common Coupling which separates the former from the latter. At the time of an intentional islanding or fault at the grid level, a microgrid is able to disconnect itself...
Efficient and effective use of renewable energy, distributed generation and energy storage can potentially solve global problems such as energy crisis and climate change. A promising solution to interconnecting these distributed energy resources with the grid is the microgrid paradigm. A microgrid may comprise a variety of inverter-interfaced distributed energy resources such as photovoltaic arrays,...
This paper examines the feasibility of applying a micro hydro power generation system as one of the enabling technologies that previously submitted for a balanced distributed generation strategy through a modified microgrid as part of the various regional energy programs underway in Africa. In addition, this paper also points to R&D advancements in various technologies focused on energy sustainability...
This paper investigates dynamic behavior of a distribution subsystem (microgrid) with three distributed generation (DG) units to planned and accidental switching event. Three DG units are one gas-turbine synchronous generator and a variable-speed wind turbine with doubly fed induction generator (DFIG) and a converter based DG. A power control approach is proposed for DG units to provide both voltage...
To provide a test facility for possible demonstrations of advanced distributed generation system integration strategies, a single-phase laboratory-scale Microgrid system is set up. Two distributed generators are included in this Microgrid, a photovoltaic simulator and a wind turbine simulator. Both of them are connected to the AC grid via flexible power electronic interface respectively. For stable...
To provide a test facility for possible demonstrations of advanced distributed generation system integration strategies, a single-phase laboratory-scale Microgrid system is set up. Two distributed generators are included in this microgrid, a photovoltaic simulator and a wind turbine simulator. Both of them are connected to the AC grid via flexible power electronic interface respectively. For stable...
Nowadays, renewable energy such as wind turbine generator and photovoltaic system are introduced in power system. Output power fluctuations of these generation systems will result in frequency deviations and terminal voltage fluctuations. In order to overcome these problems, battery energy storage system is used for frequency and voltage control. However, it needs large capacity of battery system...
This paper examines stability performances of a micro-grid application under both small and large disturbances, including islanding mode of operation. The system modeled encompasses dynamics and control of the doubly-fed induction generator, wind turbine, synchronous generator, and constant-power load. Fluctuation of wind speed is modeled using Weibull distribution. Simulated test results reveal that...
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