A Comprehensive Benefits Evaluation of Transmission Investment Plans Based on Multiscenario AC OPF Simulation

The new round market-oriented reforms and transmission and distribution price regulation require more precise transmission investment plans, and accurate ex-ante evaluation of the comprehensive benefits of transmission investment plans is a prerequisite. This paper put forward a comprehensive benefit evaluation index system covering safety and reliability, economical efficiency, green and low carbon considering the actual situation of China’s power grid development. The element models and boundary conditions of comprehensive benefit evaluation are analyzed, and a multiscenario simulation process based on AC OPF is designed. Finally, taking a provincial power grid as an example, different simulation scenarios considering load and generation changes within the evaluation cycle are constructed, and the multiscenario evaluation of the investment plans to be evaluated ware conducted. The results verified the feasibility of the proposed index system and simulation method. Future research direction of the comprehensive evaluation of the transmission investment plans is discussed.