Study on the Optimum Scheme of 220 kV Regional Power Grid Based on N-1 Security Constraints

During the flood period, a large number of wind power grids connected to the grid network will cause the N-1 overload of the power supply channel in a certain area under low-valley load mode, and the tidal currents in central and eastern regions of the region are limited under the peak load operation mode during the dry season. Considering the above problems, this paper proposes a 220kV grid optimization scheme based on the N-1 safety constraint, by witch the regional power flow distribution is optimized, the bottleneck of 220kV power grid transmission and power supply in the region is eliminated, the grid operation risk is reduced, and the grid operation economy can be improved. This program has important reference significance for the actual production operation of the power grid.