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Supply and Demand Control of Dispersed Type Power Sources in Micro Grid

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7 Author(s)
Matsubara, M. ; Shibaura Inst. of Technol., Tokyo ; Fujita, G. ; Shinji, T. ; Sekine, T.
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Renewable energies such as wind power or photovoltaic energy are environmentally focused but the output power fluctuation of the renewable energies may cause excess variation of voltage or frequency of the grid (Ramirez et al., 2004; Oliva and Balda, 2003), Marei et al., 2004), Okuyama et al., 2003). Increase of the amount of renewable energies would violate the quality of the grid (McCusker et al., 2002; Gupta and Pahwa, 2004; Bhowmik et al., 2003), Hernandez, 2003). The micro grid in which dispersed energies compensate the variation from the renewable energies can expand the installation limit of the renewable energies by maintaining the quality of the interconnected grid (Guan et al., 2003; Pregelj et al., 2004; Hayashi et al., 2003). In this paper, how the gas turbines absorb the power variation from the wind generation and load is discussed. In order to control output power, gas turbines must run at partial load operation, which results in lower efficiency. Tie-line power flow and frequency fluctuation caused by imbalance between supply and demand is also discussed. It is shown that gas turbine output control is effective method to absorb output fluctuation from load and wind farm. If the exhausted thermal energy from a gas turbine can be used for co-generation, more energy saving is expected

Published in:

Intelligent Systems Application to Power Systems, 2005. Proceedings of the 13th International Conference on

Date of Conference:

6-10 Nov. 2005