Knowledge-Driven Calculating Method for Transmission Section Limit of Large Power Grid

With the development of power system, the operation mode of powersystem is becoming more and more complex. In order to improve the security level of power system operation, a knowledge-driven method for calculating the transmission section limit of large-scale power grid is proposed. Firstly, a calculation model of transmission section limit is established by comprehensively considering static security and stability constraints and transient stability constraints of a large power grid; Then, a knowledge-driven calculation method of transmission section limit is proposed, which makes the calculation process of transmission section limit knowledgeable through knowledge mapping, and the implementation scheme of generator autonomous search and generator optimal switching is designed to realize the fast calculation of transmission section limit of large power grid. Finally, the effectiveness and correctness of the proposed method are verified in a regional power grid with 2128 nodes and a cross-regional power grid with 12643nodes in China.