Market Design and Optimal Dispatch of Energy Storage Systems in North China Grid

With the rapid growth of energy storage systems, the various advantages such as high response rate, switchable charging and discharging mode are significant for power grid control and renewable energy accommodation. This paper designs a technical framework and market model of energy storage systems incorporated into the optimal control of power grid. A practical optimal control platform of dispatch center of North China Grid is built to realize the interaction and closed-loop control of energy storage aggregators. The mode design of energy storage aggregators participating in the valley-filling market is also descripted in this paper. Based on practice by the North China Grid, the proposed strategy is verified that it can benefit both traditional generator and energy storage aggregators. With the commercial operation of energy storage aggregators, the valley-filling capability of power grid is improved, and further development of technical and commercial value of energy storage systems can be realized.