TransAlta is entitled to a maximum generation of 650 MW at a given hour in the Alberta electricity market. While it owns majority of coal plants including Sundance, Sheerness etc. in Alberta, it retains very little offer control on them due to existing power purchase agreements. It is due to this reason that its ability to influence the Alberta pool price with aggressive bidding is quite limited.
To know more about its 3Q14 performance, get our full report here.