Optimal Configuration Strategy of Distributed Synchronous Condenser for Large-scale New Energy Sending End System

In the large-scale new energy transmission system, the number of new energy stations and collection station is large, and the power grid structure is complex, the multiple renewable energy station short circuit ratio of each node is lower than the actual operation requirements, in order to improve the short circuit ratio of all new energy stations in the system, the scheme of arranging distributed synchronous condensers(SC) in each station is adopted, which involves two key steps of synchronous condenser location and capacity configuration. On the basis of the multiple renewable energy station short circuit ratio(MRSCR) calculation method, a composite index is derived to characterize the demand degree of the node for the distributed SC, which includes two indexes of the comprehensive compensation demand degree of the node MRSCR and the compensation capacity of the node MRSCR, and the configuration method based on the composite index is designed to optimize the configuration scheme of the distributed SC. Finally, in the PSD-BPA simulation software, the actual synchronous condenser optimization configuration is carried out by using the high proportion new energy sending end system, and the effectiveness of the SC optimal configuration method based on composite indicators has been verified.