Abstract
This paper analyses the emergency station blackout (EM-SBO) power supply arrangement of nuclear power plants (NPPs) pre and post Fukushima nuclear disaster at Japan. The entire world has realized that, enhancement of existing level of safety power supply is necessary for safe shutdown of reactor. In line with above, this paper is proposing inclusion of renewable energy based micro grid (MG) concept into the NPPs. A typical 500 MWe NPP has been considered for conceptual analysis of MG by integrating with EM-SBO bus as case study. The proposed MG concept has been analyzed through load flow and transient stability study by using accelerated Gauss-Seidel method in ETAP software (version-16.0.0). Based on the analysis reported, rate of change of frequency for the islanded MG is very high. To overcome this issue, relay based logic is suggested to infer that, by introducing integrated MG concept, the EM-SBO power supply may be strengthened.
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