Actually, power sector in Bengal got a serious revival in late 80's by the Jyoti Basu government and continued during Buddhadeb's tenure. The then power minister Mrinal Bannerjee was doing excellent job in his office. A number of state of the art Chinese power plants came into service in 2007-2008, but from 2011 demands had taken a horrible downturn; And what the next power minister is doing is simply boasting the ridiculous self-assertion that its them who have made Bengal a power surplus state. Propaganda at its best.
But still the rural electrification percentage in WB as on 2011 was 54%, Same was around 37% in 2001. So after 34 years in power with good minister and good planning 36% of the end users were in dark.
Now in 5 yrs it is 97%. A rise of over 40%. You have to give her credit where it is due.