Evaluation of CO<sub>2</sub> Emission Impact by Electricity Market Deregulation and Massive Introduction of Renewable Energy

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  • KOBAYASHI Yusuke
    Department of Environment Systems, Graduate School of Frontier Science, The University of Tokyo
  • YOSHIDA Yoshikuni
    Department of Environment Systems, Graduate School of Frontier Science, The University of Tokyo

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  • 電力小売自由化と再生可能エネルギー普及のCO<sub>2 </sub>排出量への影響評価

Abstract

<p>This paper evaluates CO2 emission increase after the deregulation of Japanese electricity whole sale market in 2016 and considers how to introduce massive renewable energy in order to reduce CO2 emission. A great amount of coal power plants’ construction is planned in Japan not only by newly entering power providers but also by existing providers because of its low cost and a halt of nuclear generators after Fukushima disaster. Therefore, CO2 emissions in Japan will increase after 2016 by those generators. We built the optimal power generation mix model considering recently released construction plans, and estimated the increase of CO2 emission. Calculated results shows that CO2 emissions increase around 10% after the deregulation. In addition to it, we calculated the optimal mix of a battery introduction and a capacity expansion of inter-regional transmission line in terms of costs, developing another optimal power mix model which reflects the variability of renewables. The result shows that by the battery price plummeting, the capacity expansion of transmission line connecting Hokkaido region and Tohoku region will become cost-efficient, and that will make it possible for Japan to use the renewable energy introduction potential in Hokkaido region efficiently.</p>

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