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There is a vast amount of energy available in ocean waves which can contribute to provide the electricity supply specially for countries surrounded by the ocean. This paper provides background knowledge in different techniques to harness the kinetic and potential energy in wave power along with an overview of the recent developments in Oscillating Water Columns Wave Energy Converters. The main purpose of this study is to provide a thorough review on the current state of the technology and methods in Wave Energy Converters and to help scientists to find the future potential and gaps in this area. Moreover, significant research opportunities are identified based on the literature review of the existing research studies, and research problems to be addressed are presented and can be used as tool for the future research in this area.

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This article introduces a new method for particle swarm optimizationalgorithm.This method will improve the speed of reaching minimization point of cost value. Then we applied three typical methods on Economic dispatch problem with the similar terms for three system and after comprehensive tests on these system, we observed that our new method improves mean time and mean cost of our application.At the end of the each part of the article, results were compared to each other in the separate table based on mean time, best cost and mean cost with specific values of generation.