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Cross-layer Design for Real-Time Grid Operation: Estimation, Optimization and Power Flow [article]

Miguel Picallo, Dominic Liao-McPherson, Saverio Bolognani, Florian Dörfler
2022 arXiv   pre-print
time-varying AC Optimal Power Flow (AC-OPF) problem.  ...  Within the estimation, we design an online power flow solver that efficiently computes power flow approximations in real time.  ...  CONCLUSIONS AND OUTLOOK In this paper, we proposed an algorithm for real-time grid operation that combines Online Feedback Optimization (OFO) and dynamic estimation with an online power flow solver.  ... 
arXiv:2109.13842v5 fatcat:xur4nu4u55bitbzqlqqaxmocce

A Survey of Real-Time Optimal Power Flow

Erfan Mohagheghi, Mansour Alramlawi, Aouss Gabash, Pu Li
2018 Energies  
This task should be performed by an online optimization. Therefore, real-time optimal power flow (RT-OPF) has become an attractive topic in recent years.  ...  The paper focuses on a number of topics which are reviewed in chronological order of appearance: offline energy management systems (EMSs) (deterministic and stochastic approaches) and real-time EMSs (constraint  ...  Abbreviations Figure 1 . 1 Offline optimal power flow (OPF) (gray) and real-time (RT)-OPF (black). Figure 1 . 1 Offline optimal power flow (OPF) (gray) and real-time (RT)-OPF (black).  ... 
doi:10.3390/en11113142 fatcat:thhtrjenwvdmbkf7ktze3inywi

Real-time distributed algorithms for nonconvex optimal power flow

Yuejiang Liu, Jean-Hubert Hours, Giorgos Stathopoulos, Colin N. Jones
2017 2017 American Control Conference (ACC)  
The optimal power flow (OPF) problem, a fundamental problem in power systems, is generally nonconvex and computationally challenging for networks with an increasing number of smart devices and real-time  ...  The effectiveness of the proposed algorithm for real-time nonconvex OPF problems is demonstrated in numerical simulations.  ...  controlling power flow and smart devices for closed-loop grid operation in real-time.  ... 
doi:10.23919/acc.2017.7963469 dblp:conf/amcc/LiuHSJ17 fatcat:fptzif6ihraxrf5bjx76vr6vfq

Supervised Learning for Optimal Power Flow as a Real-Time Proxy [article]

Raphael Canyasse, Gal Dalal, Shie Mannor
2016 arXiv   pre-print
In this work we design and compare different supervised learning algorithms to compute the cost of Alternating Current Optimal Power Flow (ACOPF).  ...  Integrated in a multiple time-horizon coordination framework, we refer to this approximation module as a proxy for predicting short-term decision outcomes without the need of actual simulation and optimization  ...  INTRODUCTION Alternating Current Optimal Power Flow (ACOPF) is solved hourly or intra-hourly by system operators (SO) world-wide as part of real-time operation process, to ensure safe and robust operation  ... 
arXiv:1612.06623v1 fatcat:pdinrey35rdgxmxws7ile42aku

Real-Time Optimal Power Flow under Wind Energy Penetration-Part II: Implementation [article]

Erfan Mohagheghi, Aouss Gabash, Pu Li
2018 arXiv   pre-print
In this paper (Part II) we implement the prediction-updating approach developed in Part I to address fast changes in wind power generation when solving a complex real-time optimal power flow (RT-OPF) problem  ...  Then the operation strategy is updated in a short sampling time (every 20 seconds) considering real wind power values.  ...  INTRODUCTION The method of the real-time optimal power flow (RT-OPF) under wind energy penetration is presented in Part I of our paper [1] .  ... 
arXiv:1806.11172v1 fatcat:53abpc72kfhyjncefcdm5dxgcq

Real-Time Optimal Power Flow under Wind Energy Penetration-Part I: Approach [article]

Erfan Mohagheghi, Aouss Gabash, Pu Li
2018 arXiv   pre-print
Real-time optimal power flow (RT-OPF) under wind energy penetration is highly desired but extremely difficult to realize.  ...  We consider essential scenarios around forecasted data of wind power that would probably happen during the computation time required for solving a large-scale complex optimal power flow problem.  ...  SUMMARY In this paper, a real-time optimal power flow (RT-OPF) framework is proposed for active distribution networks with intermittent wind power penetration.  ... 
arXiv:1806.11171v1 fatcat:jf7vy6zombeddgig6dqonbvueq

Model-Free Primal-Dual Methods for Network Optimization with Application to Real-Time Optimal Power Flow [article]

Yue Chen, Andrey Bernstein, Adithya Devraj, Sean Meyn
2019 arXiv   pre-print
Finally, the paper applies this methodology to a real-time optimal power flow problem in power systems, and shows its efficacy on the IEEE 37-node distribution test feeder for reference power tracking  ...  This paper examines the problem of real-time optimization of networked systems and develops online algorithms that steer the system towards the optimal trajectory without explicit knowledge of the system  ...  MODEL-FREE REAL-TIME OPTIMAL POWER FLOW The application considered in this paper is real-time optimization of the power injections of distributed energy resources (DERs) in a distribution system.  ... 
arXiv:1909.13132v1 fatcat:t7mfso65nnax7mvu6zf74nmpdi

A Feasible Reduced Space Method for Real-Time Optimal Power Flow [article]

François Pacaud, Daniel Adrian Maldonado, Sungho Shin, Michel Schanen, Mihai Anitescu
2021 arXiv   pre-print
We propose a novel feasible-path algorithm to solve the optimal power flow (OPF) problem for real-time use cases.  ...  The method augments the seminal work of Dommel and Tinney with second-order derivatives to work directly in the reduced space induced by the power flow equations.  ...  This requires adaptation of optimal power flow (OPF) algorithms for operation in a real-time setting.  ... 
arXiv:2110.02590v1 fatcat:kqchrxrbxzbxphoykvzipipxp4

A Framework for Real-Time Optimal Power Flow under Wind Energy Penetration

Erfan Mohagheghi, Aouss Gabash, Pu Li
2017 Energies  
Without considering REG, a real-time implementation of optimal reactive power flow was reported in [7] where the sampling time was between 15 min up to four hours.  ...  Developing a suitable framework for real-time optimal power flow (RT-OPF) is of utmost importance for ensuring both optimality and feasibility in the operation of energy distribution networks (DNs) under  ...  real-time optimal power flow (RT-OPF) for a prediction horizon.  ... 
doi:10.3390/en10040535 fatcat:lmacky3rsvdsbg2ar2evmsninq

Performance Analysis of Distributed Real Time Optimization Technique for Optimal Power Flow Problems

2019 International Journal of Engineering and Advanced Technology  
This paper realizes in real time optimization and to track the time varying OPF problem and for numerical optimization method different quasi-Newton methods are used.  ...  In centralized approach of optimization, optimal power flow operation is performed by collecting information at central controller.  ...  Therefore for real time operation deterministic optimal power flow techniques are not appropriate.  ... 
doi:10.35940/ijeat.f1245.0986s319 fatcat:jbfpllmuvng25kc22hito7hkfa

Real-time pricing and distributed decision makings leading to optimal power flow of power grids

Kenji Hirata, Joao P. Hespanha, Kenko Uchida
2015 2015 American Control Conference (ACC)  
We consider the optimal power flow problem with the DC power flow model, and the New England 39-bus test system is used.  ...  Motivated by distributed control problems of power supply/demand networks, this paper investigates application case studies of the real-time pricing and distributed decision makings methodology.  ...  real-time.  ... 
doi:10.1109/acc.2015.7171073 dblp:conf/amcc/HirataHU15 fatcat:vkws7jnmebgelgsquwn37b4xey

Real-Time Active-Reactive Optimal Power Flow with Flexible Operation of Battery Storage Systems

Erfan Mohagheghi, Mansour Alramlawi, Aouss Gabash, Frede Blaabjerg, Pu Li
2020 Energies  
In this paper, a multi-phase multi-time-scale real-time dynamic active-reactive optimal power flow (RT-DAR-OPF) framework is developed to optimally deal with spontaneous changes in wind power in distribution  ...  time.  ...  However, BSSs introduce dynamic terms to the problem of optimal power flow (OPF).  ... 
doi:10.3390/en13071697 fatcat:bpyb5uuuvrcm5oqtfsqdv6ipmq

Real-Time Optimal Power Flow Using Twin Delayed Deep Deterministic Policy Gradient Algorithm

Jong Ha Woo, Lei Wu, Jong-Bae Park, Jae Hyung Roh
2020 IEEE Access  
So, we need to calculate power flow in every moment for power balance equation. However, real-time OPF shall be very fast in computation.  ...  to control and dispatch these resources in real-time [2] .  ... 
doi:10.1109/access.2020.3041007 fatcat:xk6m6d4v3bfqtfmdobosznbpaq

The Real-Time Research of Optimal Power Flow Calculation in Reduce Active Power Loss Aspects of Power Grid

Yuting Pan, Yuchen Chen, Zhiqiang Yuan, Bo Liu
2015 International Journal of Advanced Computer Science and Applications  
It carries out online real-time optimal flow calculation within the condition that meets the control variables and state variables of the equality and inequality constraints.  ...  In order to research how to availably reduce the active power loss value in power grid system when the power system is operating, it offers a quantitative research in theory through conceiving the unbalanced  ...  methods by the online real-time power flow calculation software, then let them respectively compare with the value 0.008618.  ... 
doi:10.14569/ijacsa.2015.060212 fatcat:ij52tw2nbffslcpzhaznd4knqm

Real-Time Dynamic Optimal Power Flow in Electric Vehicles Considering the Lifetime of the Components in the E-Powertrain

Mohagheghi Erfan, Gasso Joan Gubianes, Li Pu
2020 Trends in Computer Science and Information Technology  
Therefore, it is necessary to perform Optimal Power Flow (OPF) in the operation of the e-powertrain.  ...  This means that the expended life cost of the components can be decreased by allocating an optimal share of the total power to each energy source and power electronic device at an optimal time instance  ...  E, Gasso JG, Li P (2020) Real-Time Dynamic Optimal Power Flow in Electric Vehicles Considering the Lifetime of the Components in the E-Powertrain.  ... 
doi:10.17352/tcsit.000020 fatcat:wvpe37kej5f73khxau3736xrxy
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