With the gradual increase of the intermittent renewable energy generation

the demand of system reserve capacity is raised accordingly. The pure use of spinning-grade reserve for supporting reserve capacity to the system will not only cause economic problems

but also lead to high CO2 emission from long-term maintenance of high proportion of spinning-grade reserve

which violates the original intention in developing renewable energy generation. The use of flexible non-spinning-grade reserve will provide standby service and have great help to improve the adequacy of the system

which is an important way to promote the consumption of renewable energy. Aiming at the inadequacy of current optimization research in non-spinning-grade reserve

firstly

the dispatch mode and optimization model for non-spinning reserve on both the generation side and demand side are analyzed under the market mechanism. Then

a hybrid optimization method considering the differences and complementarities of spinning-grade and non-spinning reserve is proposed under multiple adequacy scenarios. Finally

detailed case studies verify the feasibility and effectiveness of the proposed optimization method.