In view of the influence of big user load on the stability of power grid,three reliability evaluation indexes were proposed:annual failure frequency of load point,annual failure duration of load point and average supply availability.In DigSILENT/PowerFactory simulation software,equivalent models of power grids of various voltage levels were estab-lished,and reliability parameters and outage arrangements of power grids in the vicinity of big user substations were set up.Taking a big user in a coastal city as an example,the reliability indexes of interface substations between big user sub-stations and near-area power grids were simulated and calculated in the year of initial operation and five years later.The results showed that the reliability evaluation results of the near-area power grid of big user substations under the back-ground of new power system can provide technical support for power grid enterprises to make decision management for the access of big users to the power system.
关键词
新型电力系统/电网企业/大用户/可靠性/决策管理
Key words
new power system/power grid enterprise/big user/reliability/decision management
维普
万方数据