A Study on Power Flow Congestion Relief in Cooperation with Customer-side Cogeneration Systems

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  • Furusawa Ken
    Dept. of Electrical Eng., Graduate School of Eng., Osaka University
  • Yanase Kazunori
    Dept. of Electrical Eng., Graduate School of Eng., Osaka University
  • Sugihara Hideharu
    Dept. of Electrical Eng., Graduate School of Eng., Osaka University
  • Tsuji Kiichiro
    Dept. of Electrical Eng., Graduate School of Eng., Osaka University

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  • 需要家コージェネレーションシステムとの協調運用による送電ネットワークの混雑緩和に関する研究
  • ジュヨウカ コージェネレーション システム ト ノ キョウチョウ ウンヨウ ニ ヨル ソウデン ネットワーク ノ コンザツ カンワ ニ カンスル ケンキュウ

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Abstract

Dispersed generation technologies (e.g. Gas-engines) have greatly advanced in recent years. Gas engines are often operated as the main component of a cogeneration system (CGS). By using exhaust heat, the total efficiency of CGSs can reach from 70% to 80%, and as a result, it is also useful for reductions of CO2 emission. Therefore CGSs have been given preferential treatment by the Japanese government and their installation and use is expected to become widespread in the future. As a demand response program, the authors proposed a method whereby CGSs at the customer-side are used for congestion relief in transmission networks. In the proposed method, the optimal configuration of energy systems including CGSs at the customer-side is determined. As well, the optimal operation of the electric utility's generators is also determined taking into account the CGS operation patterns. This paper evaluates both costs to the electric utility and the customers' cost for congestion relief in transmission networks. Further, we evaluate the influence on CO2 emission and primary energy consumption from the view point of a unified energy system with CGSs providing input on a flexible operation pattern.

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