Texas electricity firm files for bankruptcy citing $1.8 billion in claims from grid operator

By Gary McWilliams HOUSTON (Reuters) - Texas's largest and oldest electric power cooperative on Monday filed for bankruptcy protection in federal court in Houston, citing a disputed $1.8 billion bill from the state's grid operator. Brazos Electric Power Cooperative Inc is one of dozens of electricity providers facing enormous charges stemming from a severe cold snap last month. The fallout threatens utilities and power marketers who collectively face billions of dollars in blackout-related charges, executives said. Unusually frigid temperatures knocked out nearly half of the state's power plan...