Optimization Research on the $\pi$ T hybrid structure of 110kV Power Grid

There exsits some operational problems of the πT hybrid structure, such as large workload of maintenance, flexibility and forced power outage, which can not meet the increasing demand for electric power reliability. In this paper, the problems existing in the actual operation of the πT hybrid structure are analyzed in detail, and the optimization scheme is put forward. The technical and economic demonstration of the optimization scheme is carried out. The transition scheme of πT hybrid structure to chain π connection structure has been studied. In order to guid the actual work, the paper has formulated the principle of 110 kV power grid planning.