Integration of wind power into autonomous electricity systems strongly depends on the specific technical characteristics of these systems: the regulations applied should take into account physical system constraints. Introduction of market rules makes the issue even more complicated since the interests of the market participants often conflict each other. In this paper, an integrated tool for the comparative assessment of alternative regulatory policies is presented along with a methodology for decision-making based oil alternative scenarios analysis. The social welfare concept is followed instead of the traditional Least Cost Planning. (c) 2004 Elsevier Ltd. All rights reserved.