Texas power company Energy Future Holdings is expected to file for bankruptcy as early as this week as it struggles to pay its hefty debt load of more than $40 billion because of cheap electricity prices, Reuters reported on Friday. The former TXU Corp., which owns 14 power plants, faces a deadline on Thursday, when a 30-day grace period stemming from a missed bond payment will expire, allowing creditors to push the company into default. Energy Future is aiming to file for chapter 11 protection in Delaware ahead of markets opening on Tuesday.