Abstract
Due to the rapid development of renewable energy (RE), the power transmission and transformation equipment of some renewable energy gathering stations are congested especially at noon. Therefore, an operation simulation method considering energy storage system (ESS) is proposed, and some evaluation indices of source-network-storage are given. This paper proposes two solutions to alleviate the contradiction between renewable energy utilization and equipment congestion: expanding equipment and configuring ESS. To compare the utilization rate of renewable energy and the investment cost of the power grid, the cost of two schemes of expanding key gathering station equipment and configuring ESS under the condition of increasing the same utilization rate of renewable energy are compared, to give suggestions for the coordinated development of renewable energy and power transmission and transformation investment. ROTS system is used to compare two schemes of equipment expansion and ESS configuration in some renewable energy gathering stations with transmission and transformation congestion. The appropriate scheme is selected according to the indices proposed.
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