Open AccessAdvancements in co‐simulation techniques in combined transmission and distribution systems analysis
Author(s) -
Velaga Yaswanth Nag,
Krishnamoorthy Gayathri,
Dubey Anamika,
Chen Aoxia,
Sen Pankaj K.
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2019.0003
Subject(s) - decoupling (probability) , computer science , power flow , electric power system , transmission system , transmission (telecommunications) , reliability engineering , power (physics) , telecommunications , control engineering , engineering , physics , quantum mechanics
Common practice in transmission and distribution (T&D) systems analysis has been to treat them independently by decoupling those at the point of common coupling (PCC). With the large amount of distributed energy resources (DER) being added in distribution networks, the interactions between T&D systems at PCC produce unacceptable errors. This study discusses an alternate approach for the combined T&D systems analysis using co‐simulation technique. The proposed framework couples the analysis of the two systems by iteratively exchanging the power flow variables at the PCC. The approach is implemented for an IEEE 9‐bus transmission test system coupled with the IEEE 13‐bus distribution test system and the analysis is validated against an equivalent stand‐alone combined T&D system model.