Model-Free Optimal Coordination of Distributed Energy Resources for Provisioning Transmission-Level Services

Arnold, Dan; Sankur, Michael D.; Negrete-Pincetic, Matías; Callaway, Duncan S.

doi:10.1109/tpwrs.2017.2707405

Cited by 50 publications

(41 citation statements)

References 11 publications

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“…One PV source per each feeder is considered to be the case of medium PV dispersion rate (8.5 MVA total peak power). Although different control schemes are proposed for finding the optimum level of reactive power generation (e.g., [2,11,22,[26][27][28]), in this research, uniform reactive power generation of individual PV sources is assumed. In fact, the focus of the research was to investigate reactive power generation influence on the overall system behavior.…”

Section: One Pv Source Per Each Feedermentioning

confidence: 99%

Reactive Power Compensation with PV Inverters for System Loss Reduction

Vlahinić

Franković

Komen³

et al. 2019

Energies

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Photovoltaic (PV) system inverters usually operate at unitary power factor, injecting only active power into the system. Recently, many studies have been done analyzing potential benefits of reactive power provisioning, such as voltage regulation, congestion mitigation and loss reduction. This article analyzes possibilities for loss reduction in a typical medium voltage distribution system. Losses in the system are compared to the losses in the PV inverters. Different load conditions and PV penetration levels are considered and for each scenario various active power generation by PV inverters are taken into account, together with allowable levels of reactive power provisioning. As far as loss reduction is considered, there is very small number of PV inverters operating conditions for which positive energy balance exists. For low and medium load levels, there is no practical possibility for loss reduction. For high loading levels and higher PV penetration specific reactive savings, due to reactive power provisioning, increase and become bigger than additional losses in PV inverters, but for a very limited range of power factors.

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Section: One Pv Source Per Each Feedermentioning

confidence: 99%

Reactive Power Compensation with PV Inverters for System Loss Reduction

Vlahinić

Franković

Komen³

et al. 2019

Energies

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“…We recognize that it may be difficult to solve a centralized OPF of this type in an on-line fashion due to lack of proper network models and a robust communications system. In previous works exploring OPF approaches to managing DER we have extensively explored alternative approaches to solving centralized OPFs using model-free and low communication optimization techniques [10]. Moving forward, we will attempt to utilize this work to lessen the information and communi-cations requirement associated with the OPF presented in this paper, thereby allowing optimal voltage phasor management in an on-line setting.…”

Section: Discussionmentioning

confidence: 99%

“…Some of the authors of the present work consider optimal governance of DER in a model-free setting [10]. Additional recent strategies for DER control are cataloged in [11].…”

Section: Introductionmentioning

confidence: 99%

Model-Free Optimal Voltage Phasor Regulation in Unbalanced Distribution Systems

Sankur

Dobbe

Meier

et al. 2020

IEEE Trans. Smart Grid

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The proliferation of phasor measurement units (PMUs) into electric power distribution grids presents new opportunities for utility operators to manage distribution systems more effectively. One potential application of PMU measurements is to facilitate distribution grid re-configuration. Given the increasing amount of Distributed Energy Resource (DER) penetration into distribution grids, in this work we formulate an Optimal Power Flow (OPF) approach that manages DER power injections to minimize the voltage phasor difference between two nodes on a distribution network to enable efficient network reconfiguration. In order to accomplish this, we develop a linear model that relates voltage phase angles to real and reactive power flows in unbalanced distribution systems. Used in conjunction with existing linearizations relating voltage magnitude differences to power flows, we formulate an OPF capable of minimizing voltage phasor differences across different points in the network. In simulations, we explore the use of the developed approach to minimize the phasor difference across switches to be opened or closed, thereby providing an opportunity to automate and increase the speed of reconfigurations in unbalanced distribution grids.

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“…In [136], a model-free optimal dispatch of controllable DER is proposed to control the power exchange between TN and DN while maintaining DN bus voltages within limits. It is based on a two-dimensional extremum seeking (ES) control that adds orthogonal sinusoidal perturbations to active and reactive power of controllable DER.…”

Section: B Rule-based Methods Vs Distributed Optimizationmentioning

confidence: 99%

Review of Challenges and Research Opportunities for Voltage Control in Smart Grids

Sun

Guo

et al. 2019

IEEE Trans. Power Syst.

333

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In this paper, we review the emerging challenges and research opportunities for voltage control in smart grids. For transmission grids, the voltage control for accommodating wind and solar power, fault-induced delayed voltage recovery (FIDVR), and measurement-based Thévenin equivalent for voltage stability analysis are reviewed. For distribution grids, the impact of high penetration of distributed energy resources (DER) is analyzed, typical control strategies are reviewed, and the challenges for local inverter Volt-Var control is discussed. In addition, the motivation, state-of-art, and future directions of the coordination of transmission system operators (TSO) and distribution system operators (DSO) are also thoroughly discussed.

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Model-Free Optimal Coordination of Distributed Energy Resources for Provisioning Transmission-Level Services

Cited by 50 publications

References 11 publications

Reactive Power Compensation with PV Inverters for System Loss Reduction

Reactive Power Compensation with PV Inverters for System Loss Reduction

Model-Free Optimal Voltage Phasor Regulation in Unbalanced Distribution Systems

Review of Challenges and Research Opportunities for Voltage Control in Smart Grids

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