TY - GEN
T1 - Integrative Simulation of Inverter-Based PV Systems and Unbalanced Distribution System with Adaptive Step Size Framework in OpenDSS
AU - Chen, Mengxi
AU - Ma, Shanshan
AU - Ayyanar, Raja
AU - Vittal, Vijay
N1 - Publisher Copyright:
© 2023 IEEE.
PY - 2023
Y1 - 2023
N2 - As the penetration of inverter-based photovoltaic (PV) systems with various grid support functionalities increase rapidly, it becomes critical to examine their dynamic impacts on the distribution system. For dynamic studies in OpenDSS, the software provides a fixed-step size simulation framework, and users need to build their own model in a dynamic-link library (DLL) along with the integration algorithm. Model complexities may require the program to run at a small step size, which increases the unnecessary computational burden and results in a long simulation time. This paper proposes a new integrative simulation framework with adaptive step size in OpenDSS and the user-defined DLL. This new framework can increase the simulation efficiency significantly through adjusting the dynamic simulation step size in OpenDSS by evaluating the numerical integration accuracy within the DLL. The results show that the average step size utilized by the proposed simulation framework is over 9 times the fixed step size used by the original framework for the same dynamic simulation. Computational time consumption can also be saved by 70% using the proposed simulation framework.
AB - As the penetration of inverter-based photovoltaic (PV) systems with various grid support functionalities increase rapidly, it becomes critical to examine their dynamic impacts on the distribution system. For dynamic studies in OpenDSS, the software provides a fixed-step size simulation framework, and users need to build their own model in a dynamic-link library (DLL) along with the integration algorithm. Model complexities may require the program to run at a small step size, which increases the unnecessary computational burden and results in a long simulation time. This paper proposes a new integrative simulation framework with adaptive step size in OpenDSS and the user-defined DLL. This new framework can increase the simulation efficiency significantly through adjusting the dynamic simulation step size in OpenDSS by evaluating the numerical integration accuracy within the DLL. The results show that the average step size utilized by the proposed simulation framework is over 9 times the fixed step size used by the original framework for the same dynamic simulation. Computational time consumption can also be saved by 70% using the proposed simulation framework.
KW - OpenDSS
KW - distribution system
KW - integrative simulation
KW - inverter-based resources
KW - variable step size
UR - http://www.scopus.com/inward/record.url?scp=85174695464&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85174695464&partnerID=8YFLogxK
U2 - 10.1109/PESGM52003.2023.10252693
DO - 10.1109/PESGM52003.2023.10252693
M3 - Conference contribution
AN - SCOPUS:85174695464
T3 - IEEE Power and Energy Society General Meeting
BT - 2023 IEEE Power and Energy Society General Meeting, PESGM 2023
PB - IEEE Computer Society
T2 - 2023 IEEE Power and Energy Society General Meeting, PESGM 2023
Y2 - 16 July 2023 through 20 July 2023
ER -