下記のようなフォーマットで取得できるようになったようです。
http://www.tepco.co.jp/forecast/html/images/juyo-j.csv
2011/3/24 19:30 UPDATE DATE,TIME,当日実績(万kW),前日実績(万kW) 2011/3/24,0:00,2920,2770 2011/3/24,1:00,2780,2630 2011/3/24,2:00,2690,2560 2011/3/24,3:00,2630,2500 2011/3/24,4:00,2610,2500 2011/3/24,5:00,2750,2620 2011/3/24,6:00,3060,2880 2011/3/24,7:00,3290,3160 2011/3/24,8:00,3540,3350 2011/3/24,9:00,3730,3470 2011/3/24,10:00,3720,3410 2011/3/24,11:00,3670,3410 2011/3/24,12:00,3440,3250 2011/3/24,13:00,3530,3380 2011/3/24,14:00,3480,3400 2011/3/24,15:00,3410,3320 2011/3/24,16:00,3420,3270 2011/3/24,17:00,3480,3320 2011/3/24,18:00,3590,3370 2011/3/24,19:00,0,3260 2011/3/24,20:00,0,3380 2011/3/24,21:00,0,3370 2011/3/24,22:00,0,3340 2011/3/24,23:00,0,3160
