Analysis and Research on Transmission Capacity of ±800 kV Yan-Huai UHVDC

With the large-scale production of thermal power generating units and new energy generating units, Shanxi power grid has higher and higher requirements on the power external transmission capacity. The construction of UHV project is the best measure to improve the transmission capacity of power grid, optimize the allocation of resources and resist accidents. In order to deeply study the power transmission capacity of ±800 kV Yan-Huai UHVDC, the paper analyzes the constraints on the power transmission capacity of Yan-Huai UHVDC, and simulates in detail the different power transmission capacities of Yan-Huai UHVDC under various constraints, so as to obtain the maximum power transmission capacity of Yan-Huai UHVDC. Furthermore, the power transmission capacity of Yan-Huai UHVDC near zone under different maintenance modes is further studied, which provides theoretical basis and technical support for the safe and stable operation of Shanxi power grid.