Impact of Smart Grid Development on Composite Power System Reliability Evaluation

Smart gr id is the major trend of power system development.Compared to the traditional power network,smart grid contains a large amount of new equipments for generation and transmission,which will certainly have great effects on the composite power system reliability evaluation.Taking wind power equipment with energy store device,high/ultra high voltage direct current transmission and voltage sourced converters high voltage direct current transmission as an example,this paper analyzes the effects of these devices on the composite power system reliability,and the issues attention should be paid to in the course of applying technologies in power grids.At last,considering the development process of smart grid,the paper proposes the key direction of the composite power system reliability evaluation in the future.