Study on the Optimal Operation and Planning of Power systems with a lot of Distributed Generators

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The following research results are attained to realize the optimal operations of the existing distribution systems with lots of distributed generators (DGs) and to develop a new type power delivery system which can adopts to connect lots of DGs.1.Operation method of the existing distribution system with DGs.(1)Development of loss-minimum re-configuration method by tabu search and by several types of load flow programs some of which can deal with load unbalances caused by DGs.(2)Evaluation of voltage deviation effects to distribution systems by DGs, and evaluation of voltage control effect of DG's reactive output.2.Development of a new optimal network configuraion method for FRIENDS.(1)Development of optimal network configuraion method of FRIENDS by tabu search in which power interruption cost is used to evaluate the optimality.(2)Development of a new optimal operation method of distributed energy storage systems for a fault state of FRIENDS through meta-heuristics method, etc.