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The sustainable energy based generation systems, such as photovoltaic and wind turbine generation systems, normally adopt inverters to connect to the grid. These power electronics interfaces possess characteristics of small inertia and small output impedance, which create difficulties to stabilize the voltage and frequency of a distributed micro power source. To deal with this problem, this paper is focus on the research of a virtual synchronous generator based control method by introducing virtual inertia into the control loop and emulating the control scheme of a traditional synchronous generator. After discussing the design process of the virtual speed and excitation regulators, system stability and parameter sensibility have been analyzed. At last, some simulations have been carried out and the effectiveness of proposed method is demonstrated by simulation results comparison and analysis.
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Yao et al. (2015) studied this question.
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