A Distributed Energy Resources Integrated Transmission and Distribution Continuation Power Flow Model With Sequence Component Approach

Incorporating distributed energy resources (DERs) has introduced challenges to the long-term voltage stability of the integrated power transmission and distribution (T&D) system including voltage stability issues. This paper proposes an integrated continuation power flow (CPF) framework considering both transmission and distribution (T&D) network on a three-sequence framework known as (SQ-CPF). The main advantage of this framework is that it accounts for grid and load imbalances, diverse load types, and fluctuations in renewable energy within a unified T&D simulation that comprehensively addresses all phases of the transmission and distribution network. The results after conducting numerous examinations on the multiple test T&D system indicate that SQ-CPF offers a more efficient, computationally simpler and precise assessment of the weak phase voltage stability margin of the T&D power grid.