Distribution Grid Optimal Power Flow Incorporating Smart Inverters and Legacy Control Devices

Authors

Alper Savasci, Florida International UniversityFollow

Document Type

Dissertation

Degree

Doctor of Philosophy (PhD)

Major/Program

Electrical and Computer Engineering

First Advisor's Name

Sumit Paudyal

First Advisor's Committee Title

Committee chair

Second Advisor's Name

Jean H. Andrian

Second Advisor's Committee Title

Committee member

Third Advisor's Name

Mohammad A. Rahman

Third Advisor's Committee Title

Committee member

Fourth Advisor's Name

M. Hadi Amini

Fourth Advisor's Committee Title

Committee member

Keywords

distribution grid modeling, optimal power flow, voltage regulation, legacy devices, smart inverter, volt-VAR control, mixed-integer programming

Date of Defense

3-28-2023

Abstract

Distribution network management/control is stepping into a new role with the integration of smart inverter-based resources (IBRs) and ongoing grid modernization initiatives. While the grid is being modernized, the existing infrastructure and the new technologies should ensure coordinated operation. Typically, modern distribution networks are managed by advanced distribution management system (ADMS), which is a digital platform that hosts major grid applications such as voltage regulation, network reconfiguration, fault isolation & service restoration and state-estimation, designed to monitor and control the entire network efficiently and reliably. ADMS applications can be represented as a mathematical optimization problem to optimize process and asset operations within the context of distribution system optimal power flow (DOPF) problem. To obtain network-wide feasible and optimal control actions in smart grids, DOPF can be used as a systematic management and coordination tool. In this dissertation study, the research efforts contribute to the field of distribution system modeling and optimization in multiple ways. Firstly, the optimization models of advanced and conventional voltage regulation devices have been developed to incorporate into system-level management processes. Particularly, novel mathematical optimization models of smart inverter voltage control functions are developed and combined with efficient DOPF formulation. Moreover, the operational models of legacy equipment are also considered for coordinated optimization framework to propose a coherent decision-support with existing infrastructure. Secondly, the developed models have been merged into a two-stage optimization and coordination framework in which conventional legacy devices and voltage/reactive power functions of smart inverters are coordinated. The proposed optimization framework established on a multi-phase power flow model so that realistic network operation considering the multi-phase couplings and unbalanced loading factors can be considered. Furthermore, to increase the solution scalability, temporal division of solution process is used. The overall coordination scheme presents a complete network optimization that can be utilized on the ADMS platforms.

Identifier

FIDC011025

ORCID

https://orcid.org/0000-0001-7870-9712

Previously Published In

A. Savasci, A. Inaolaji, S. Paudyal and S. Kamalasadan, "Efficient Distribution Grid Optimal Power Flow with Discrete Control of Legacy Grid Devices," 2021 IEEE Power & Energy Society General Meeting (PESGM), Washington, DC, USA, 2021, pp. 1-5, doi: 10.1109/PESGM46819.2021.9638228.

A. Savasci, A. Inaolaji and S. Paudyal, "Optimal Coordination of On-Load Tap Changers with Local Control Rules," 2022 IEEE Industry Applications Society Annual Meeting (IAS), Detroit, MI, USA, 2022, pp. 1-9, doi: 10.1109/IAS54023.2022.9940129.

A. Savasci, A. Inaolaji and S. Paudyal, "Distribution Grid Optimal Power Flow Integrating Volt-Var Droop of Smart Inverters," 2021 IEEE Green Technologies Conference (GreenTech), Denver, CO, USA, 2021, pp. 54-61, doi: 10.1109/GreenTech48523.2021.00020.

A. Savasci, A. Inaolaji and S. Paudyal, "Distribution Grid Optimal Power Flow with Adaptive Volt-VAr Droop of Smart Inverters," 2021 IEEE Industry Applications Society Annual Meeting (IAS), Vancouver, BC, Canada, 2021, pp. 1-8, doi: 10.1109/IAS48185.2021.9677119.

A. Savasci, A. Inaolaji and S. Paudyal, "Two-Stage Volt-VAr Optimization of Distribution Grids With Smart Inverters and Legacy Devices," in IEEE Transactions on Industry Applications, vol. 58, no. 5, pp. 5711-5723, Sept.-Oct. 2022, doi: 10.1109/TIA.2022.3183182.

Recommended Citation

Savasci, Alper, "Distribution Grid Optimal Power Flow Incorporating Smart Inverters and Legacy Control Devices" (2023). FIU Electronic Theses and Dissertations. 5298.
https://digitalcommons.fiu.edu/etd/5298