Distributed Generators are playing a vital role and had achieve lot of attention due to their greater impact on various distribution systems. This approach encourages small scale technologies to produce electricity to the need at consumer end by utilizing the renewable energy sources. Power quality and reliability of distributed power can be attained by proper placing of Distributed Generators at appropriate location. Optimization tools were predominantly increasing their importance in integration of distributed generation. This paper proposes various reviews on recent optimization techniques being used over the years to the problem solving and sizing of DG units. In contrast this paper analyses the economical, technological, environmental etc., which are rapidly growing interest on integration of distributed generation by overcoming all the challenges. At last it presents several optimization techniques of the integration of distribution generation from renewable energy sources.
DGs, RES, Optimization Techniques