Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

An Online Joint Optimization–Estimation Architecture for Distribution Networks

Journal Article · · IEEE Transactions on Control Systems Technology

Here in this article, we propose an optimal joint optimization-estimation architecture for distribution networks, which jointly solves the optimal power flow (OPF) problem and static state estimation (SE) problem through an online gradient-based feedback algorithm. The main objective is to enable a fast and timely interaction between the OPF decisions and state estimators with limited sensor measurements. First, convergence and optimality of the proposed algorithm are analytically established. Then, the proposed gradient-based algorithm is modified by introducing statistical information of the inherent estimation and linearization errors for an improved and robust performance of the online OPF decisions. Overall, the proposed method eliminates the traditional separation of operation and monitoring, where optimization and estimation usually operate at distinct layers and different time scales. Hence, it enables a computationally affordable, efficient, and robust online operational framework for distribution networks under time-varying settings.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; ETH Zurich Postdoctoral Fellowship; National Science Foundation (NSF); Hong Kong Research Grants Council (RGC)
Grant/Contract Number:
AC36-08GO28308; EE-0007998; CMMI-1728605; 24210220
OSTI ID:
1971894
Report Number(s):
NREL/JA-5D00-84187; MainId:84960; UUID:01595805-6c82-4f67-bd77-c0c5649fc20f; MainAdminID:69363
Journal Information:
IEEE Transactions on Control Systems Technology, Vol. 31, Issue 6; ISSN 1063-6536
Publisher:
IEEECopyright Statement
Country of Publication:
United States
Language:
English

References (34)

Chance-Constrained AC Optimal Power Flow for Distribution Systems With Renewables journal September 2017
Network Observability: Theory journal May 1985
Stochastic optimal power flow based on conditional value at risk and distributional robustness journal November 2015
Convex Approximations of Chance Constrained Programs journal January 2007
Double smoothing for time-varying distributed multiuser optimization conference December 2014
Accelerated Voltage Regulation in Multi-Phase Distribution Networks Based on Hierarchical Distributed Algorithm journal May 2020
Real Time Estimation of Loads in Radial and Unsymmetrical Three-Phase Distribution Networks journal November 2013
Closing the loop: Dynamic state estimation and feedback optimization of power grids journal December 2020
Gradient-Based Multi-Area Distribution System State Estimation journal November 2020
Distributed multiuser optimization: Algorithms and error analysis
  • Koshal, Jayash; Nedic, Angelia; Shanbhag, Uday V.
  • Proceedings of the 48h IEEE Conference on Decision and Control (CDC) held jointly with 2009 28th Chinese Control Conference https://doi.org/10.1109/CDC.2009.5400436
conference December 2009
Robust sample average approximation journal June 2017
Distributed Voltage Control in Distribution Networks: Online and Robust Implementations journal November 2018
Power System Static-State Estimation, Part I: Exact Model journal January 1970
Network reconfiguration in distribution systems for loss reduction and load balancing journal April 1989
Real-Time Feedback-Based Optimization of Distribution Grids: A Unified Approach journal September 2019
Optimal Power Flow Pursuit journal March 2018
Solving Optimal Power Flow for Distribution Networks with State Estimation Feedback conference July 2020
Power System SCADA and Smart Grids reference-book January 2017
Optimal power flow using particle swarm optimization journal October 2002
Optimization of conditional value-at-risk journal January 2000
Multiuser Optimization: Distributed Algorithms and Error Analysis journal July 2011
A Review on Distribution System State Estimation journal September 2017
Real-Time Optimal Power Flow journal November 2017
A Survey of Distributed Optimization and Control Algorithms for Electric Power Systems journal November 2017
Dynamic Optimal Power Flow for Active Distribution Networks journal January 2014
Asynchronous distributed voltage control in active distribution networks journal December 2020
MATPOWER: Steady-State Operations, Planning, and Analysis Tools for Power Systems Research and Education journal February 2011
Online Optimization as a Feedback Controller: Stability and Tracking journal March 2020
Optimal Distributed Feedback Voltage Control Under Limited Reactive Power journal January 2020
Distributed Reactive Power Feedback Control for Voltage Regulation and Loss Minimization journal April 2015
Online Stochastic Optimization of Networked Distributed Energy Resources journal June 2020
Autonomous Energy Grids: Controlling the Future Grid With Large Amounts of Distributed Energy Resources journal November 2020
Fast power system analysis via implicit linearization of the power flow manifold
  • Bolognani, Saverio; Dorfler, Florian
  • 2015 53rd Annual Allerton Conference on Communication, Control and Computing (Allerton), 2015 53rd Annual Allerton Conference on Communication, Control, and Computing (Allerton) https://doi.org/10.1109/ALLERTON.2015.7447032
conference September 2015
An Online Gradient Algorithm for Optimal Power Flow on Radial Networks journal March 2016