Abstract
High penetration of renewable integration, such as wind power, endangers power system security and aggravates stress on system peak-shaving and regulation. In order to improve flexibility and economy of renewable energy accommodation, an optimal configuration model of energy storage considering ramping capabilities and multi-states of gas and thermal units is established, in which gas units and energy storage are taken into account for spinning reserves scheduling together with thermal units. A state transferring model to describe operation states during start-up (SU) and shut-down (SD) processes of gas and thermal units is established, and embedded in proposed energy storage optimal configuration model. Case study indicates that research work is valid and able to be applied to precisely configure energy storage and make transmission line reinforcement strategy for power transmission grid.
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