Resilient Transmission Network Hardening Planning Coordinated with Distribution Network Defensive Strategies Against Typhoons

With the development of active distribution networks, transmission system (TS) and distribution system (DS) can be coordinated to operate in an efficient and secure manner. However, the high-impact and low-probability natural disasters like typhoons can inflict severe damage on the critical infrastructures of power sector such as transmission lines and distribution lines, putting the whole transmission and distribution network under the threat of paralysis. In order to enhance the prevention ability of the integrated transmission and distribution network (ITDN) for typhoons, a resilient transmission network hardening planning (TNHP) model and a distribution network defensive planning (DNDP) model against typhoons are established in this paper, which consider unit commitment in TNHP and the strategies of reconfiguration, islanding, distributed generators (DGs) dispatch in DNDP. To realize the coordination of ITDN's planning, a distributed optimization framework based on alternating direction method of multipliers (ADMM) algorithm is formulated to implement the resilient integrated planning of TNHP and DNDP by updating their boundary variables. Finally, the effectiveness of the proposed method is validated by numerical results of the modified IEEE-14 test system integrated with modified IEEE-33 test system.