PJM Interconnection has committed to buy electricity from gas-fired power plants until the end of the month in a rare move aimed at securing an uninterrupted supply during a cold blast across much of the United States. Bloomberg reported, citing employees of the grid operator, that PJM will procure electricity until January 31st and not, as is the normal practice, on a daily basis. This commitment, per the report, would prompt generators to secure gas supplies for a longer than usual period, enhancing power supply security in case the cold spell…