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日本の電力会社もスマートグリッドに1兆円

日経2009/12/31朝刊1面より、東京電力や関西電力もスマートグリッドに投資をするとのこと。

以下ポイント。

  • 各家庭の電力メーターを置き換えるなどの投資で1兆円
  • この1兆円の投資は電気料金からまかなうため料金の値上げがあり得る
  • 日本のスマートグリッドの機能の目玉は「家庭からの太陽光発電を電力会社の送電網に流す」

国の方針として、電力会社に家庭発電の余剰電力を買い取るように義務づける「余剰電力買い取り制度」がありますが、その延長でしょうか。

今の送電網にチマチマと逆方向に電力を流されても、きっと電力会社は困るだろうなぁとは思うのですが、まじめに小さな電力を双方向に流そうとすると1兆円規模の投資が必要ということのようです。

個人的にはこの政策はお門違い。却ってコストが増えている。電力というものはトータルで足りないのではなく、貯めれないことで需給バランスがとりづらいのが問題。ピーク時に電力が足りない状態なら、いくら送電網がスマートでもやっぱり足りない。

まじめに電力の問題を解決するにはこうすればよい。

  • 家庭で電力が貯めれるように蓄電池を設置する
  • 需要の高い時間帯は電力会社の価格は高くする
  • 蓄電池に電力を貯めるのは、電力会社の夜間電力を使ってもよし、自力で太陽光発電をしてもよし

まずは電力というエネルギーを「財」として貯めれる状態にしないと、買う・持つ・売るの判断ができない。この判断なしにグリッドをスマートにしてもロジックが作れない。いったんエネルギーに財という価値基準ができれば、その財を生産するのにもっとも適したタイミングに最も適した手段で発電ができる。

今の課題は太陽光発電の電力が高すぎるということ。経済原理に会わないモノを、普及させるために課題を電力会社に押しつけても解決しない。

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