Vermont’s Green Mountain Power wants permission to install equipment that will boost the amount of electricity that its turbines in the Lowell Mountain wind project can put out in the New England grid. The Caledonian-Record reported that Lowell wind operators noticed Tuesday that three of the 21 turbines were not producing electricity. They said capacity has been curtailed by ISO-New England, which runs the New England grid. That was a concern of the head of the governor’s Energy Generation Siting Policy Commission, which was on a tour of the wind project Tuesday. Green Mountain Power is asking the Vermont Public Service Board to approve its plan.