The worldwide smart grid and the direct transactions between power consumers and generation enterprises have been a new and important direction to further deepen the realization of electric power technology innovation

and promote the implementation of harmonious development of power and national economy.The research and practical experiences of smart grid at home and abroad are summarized

the way of distributed generation brought into reserve market is proposed

the definition and the function of operation platform of direct transaction are discussed

and the structure of reserve markets in the ancillary service is studied.Considering the mode of energy-conservation power generation dispatch

the relevant optimization decision model is established

which synthetically considers several factors such as economy

reliability

cleaness.At the end

the solving method and the examples are given and verified.