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49 he liberalization of the world’s energy markets is forcing the electric supply industry to reorganize itself from the ground up. On the one hand, it is expanding to include energy services, power marketing and information technology based services; and on the other, it is increasing asset utilization, reducing maintenance costs, and saving on investments by optimizing operation of the existing grid and reducing staff, etc, in order to reach its profit goals. In addition, economic and environmental trends point to distributed power generation units with a power output of less than 10 MW being a genuine commercial alternative to centralized power generation in the very near future. It is expected that already in the year 2010 some 25% of all new power generation facilities will be of the distributed type. Deregulation and the increase in power produced by distributed generation units will both have an impact on the power quality (PQ) in the distribution grids. In such a fast-changing and competitive market environment, an even higher value will be put on power quality than we already do today [1]. The investment required to reach a certain PQ level can vary considerably as it depends on the structure of the distribution system. On the other hand, the value of power quality is decided by the economic consequences of a PQ deficiency. For Power Quality The new paradigm for MV power distribution