(Adds comment from Allete CEO in paragraph 11) By Ross Kerber Oct 3 (Reuters) – Minnesota power regulators on Friday approved a $6.2 billion plan for a BlackRock unit and Canada Pension Plan to buy utility owner Allete, parent of Minnesota Power, saying recent modifications by the parties should address concerns about rates and clean-power investments. The 5-0 vote by the Minnesota Public Utilities Commission may reassure investors that BlackRock will be able to address regulatory and antitrust concerns as its Global Infrastructure Partners unit, which it bought last year, presses for more deals. Earlier this week, people familiar with the matter said the infrastructure unit was in talks to buy utility group AES . Separately, on Friday two people said the unit was in talks to buy a data ce

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