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Stability Enhancement of a Power System Containing High-Penetration Intermittent Renewable Generation

Original scientific paper

Journal of Sustainable Development of Energy, Water and Environment Systems
Volume 3, Issue 2, June 2015, pp 151-162
DOI: https://doi.org/10.13044/j.sdewes.2015.03.0012
Jorge Morel , Shin'ya Obara, Yuta Morizane
Department of Electrical and Electronic Engineering, Kitami Institute of Technology, Kitami, Japan


This paper considers the transient stability enhancement of a power system containing large amounts of solar and wind generation in Japan. Following the Fukushima Daiichi nuclear disaster there has been an increasing awareness on the importance of a distributed architecture, based mainly on renewable generation, for the Japanese power system. Also, the targets of CO2 emissions can now be approached without heavily depending on nuclear generation. Large amounts of renewable generation leads to a reduction in the total inertia of the system because renewable generators are connected to the grid by power converters, and transient stability becomes a significant issue. Simulation results show that sodium-sulfur batteries can keep the system in operation and stable after strong transient disturbances, especially for an isolated system. The results also show how the reduction of the inertia in the system can be mitigated by exploiting the kinetic energy of wind turbines.

Keywords: Transient stability, Renewable energy, Wind power, Solar power, Tidal power, Storage system, Sodium-sulfur battery.

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