The traditional method of determining the generator spinning reserve capacity depends on the maximum capacity of single unit in system or the fixed percentage of load. But with high penetration of renewable energy and large amount of connected power electronic equipment such as DC transmission

in order to ensure the system stability

especially the recovery of system voltage after fault clearance

more capacity of spinning reserve is needed comparing with traditional method. In this paper

the influence of spinning reserve on Hunan power grid voltage stability is analyzed with theoretical analysis and system simulation. It provides reference for system operation with high penetration of renewable energy and DC power.