A state plan to manage future renewable energy projects in coastal waters would put the kibosh on proposed large wind farms in Buzzards Bay but open up the possibility of as many as 10 turbines in the waters around Cape Cod and almost 170 turbines southwest of Martha’s Vineyard. “We’re the first state in the nation to conduct such a comprehensive ocean management plan,” Ian Bowles, state secretary of Energy and Environmental Affairs, said during a teleconference yesterday. A draft of . . .