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The installation of renewable energy generation resources (such as photovoltaic arrays and wind-turbine generators) in a microgrid is important because a microgrid can increase the penetration of renewable energies in a smart grid. A community may be a grid-tied microgrid in which an energy management system may dispatch elastic loads (such as air conditioning systems). This paper investigates the...
Underfrequency load shedding maintains the power system in a stable condition when a severe disturbance occurs. The underfrequency relay protects the power system against a blackout when the system frequency declines to predetermined settings. This paper determines the shed load at each stage for the underfrequency relay (81L) in a stand-alone microgrid considering multiple scenarios. In addition,...
Developing microgrids is an efficient approach to increasing the penetration of distributed generation (e.g., gas-turbine, wind turbine and photovoltaic power, etc.) in a power system. A microgrid can be operated by centralized control, autonomous control or multi-agents. Among all, a control center can provide a more reliable operation using many experiences related to traditional industrial power...
Development of microgrid is one of the solutions for keeping the power system intact to embed the distributed generations while considering renewable energies for substantial environment. This paper investigates the operation modes for the first outdoor microgrid test bed in Taiwan, whose generation capacity is 517.5-kW. The distributed generations in the microgrid system, which has 18 AC buses and...
Growing depletion of natural resources and the Kyoto Protocol have aroused global attention to renewable energies. In Taiwan, the goal of real power generation from renewable energies is 4% of total generation in 2012 and 18% in 2020. Although renewable energies can mitigate the green gas effect, penetration of these distributed generations may change the operation scheme in the utility. One of the...
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