An Artificial Intelligence-Based Pruning Algorithm Method for Optimal Operation Mode of AC-DC Hybrid Grid

Abstract

The ultra-high voltage DC tie line is equipped with a large-capacity supporting power supply. The coupling between its operation mode and the clearing results of inter-provincial power transactions is complex. Therefore, the intra-provincial and inter-provincial AC circuit power flow must be decoupled to ensure the construction of an equivalent DC topology. On the other hand, the section power flow and the stability limit are boundaries of each other, and the power flow interval division of some sections constrains the stability limit of other DC lines. These cross-section power flow interval constraints do not contain each other, and each constraint constitutes a separate optimization decision problem, so it is impossible to establish a unified mathematical programming problem to solve at one time. In this paper, the pruning algorithm is used to simplify the problem and ensure the rapid optimization and clearing of inter-provincial power transactions.