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120 results on '"Andrey Bernstein"'

1. Engineering Microgrids Amid the Evolving Electrical Distribution System

Author

Smriti Sharma, John O’Donnell, Wencong Su, Richard Mueller, Line Roald, Khurram Rehman, and Andrey Bernstein

Subjects
microgrid, adaptive networked microgrids, non-wires alternatives, distributed energy resource, sectionalizing, energy justice, Technology
Abstract

Non-wires alternatives and microgrid technologies are maturing and present great opportunities for electric utilities to increase the benefits they offer to their customers. They have the potential to decrease the cost of resolving traditional electrical system loading issues, contribute to carbon emissions reductions, and improve the electrical distribution system’s resilience to extreme weather events. The authors of this manuscript present a review of the research on microgrids and their practical applications. This is leveraged with the past work of the authors of this manuscript and other authors to develop specific objectives for microgrids, practical criteria for engineers to consider when deploying microgrids, stochastic methods to optimize microgrid designs, and black start requirements. This guidance is then used for the design of actual networked microgrids being deployed with adaptive boundaries.

Published
2024
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2. Optimal Energy Dispatch of Distributed PVs for the Next Generation of Distribution Management Systems

Author

Fei Ding, Yingchen Zhang, Jeffery Simpson, Andrey Bernstein, and Subramanian Vadari

Subjects
Advanced distribution management system, distributed PV, smart inverter, voltage regulation, conservative voltage regulation, optimal power flow, Distribution or transmission of electric power, TK3001-3521, Production of electric energy or power. Powerplants. Central stations, TK1001-1841
Abstract

Advanced Distribution Management Systems (ADMS) are being widely adopted by electric utilities for managing and optimizing the operations of their distribution systems. Distributed photovoltaic (DPV) systems with smart inverters can be controlled to adjust active power and reactive power outputs, and they are envisioned to become a part of (centrally or distributed) controllable assets managed by the ADMS for optimizing grid operations. This paper proposes an optimal energy dispatch strategy controlling DPV systems for regulating distribution voltages and achieving conservation voltage reduction. A convex optimization model is proposed with the use of linearized power flow, and the gradient projection algorithm is used to solve the optimal active power and reactive power outputs of smart inverters. The proposed optimal energy dispatch is implemented using an open-source ADMS platform, and simulation results have demonstrated the effectiveness of the proposed approach on improving distribution grid operations.

Published
2020
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33. Autonomous Energy Grids.

Author

Benjamin Kroposki, Emiliano Dall'Anese, Andrey Bernstein, Yingchen Zhang, and Bri-Mathias S. Hodge

Published
2018

48. Grid-Forming Frequency Shaping Control for Low-Inertia Power Systems

Author

Andrey Bernstein, Yan Jiang, Petr Vorobev, and Enrique Mallada

Subjects
Control and Optimization, Steady state, Computer simulation, Computer science, 020209 energy, media_common.quotation_subject, Automatic frequency control, 02 engineering and technology, Frequency deviation, Inertia, Grid, Electric power system, 020401 chemical engineering, Control and Systems Engineering, Control theory, Control system, 0202 electrical engineering, electronic engineering, information engineering, Overshoot (signal), Nadir, 0204 chemical engineering, media_common
Abstract

As power systems transit to a state of high renewable penetration, little or no presence of synchronous generators makes the prerequisite of well-regulated frequency for grid-following inverters unrealistic. Thus, there is a trend to resort to grid-forming inverters which set frequency directly. We propose a novel grid-forming frequency shaping control that is able to shape the aggregate system frequency dynamics into a first-order one with the desired steady-state frequency deviation and Rate of Change of Frequency (RoCoF) after a sudden power imbalance. The no overshoot property resulting from the first-order dynamics allows the system frequency to monotonically move towards its new steady-state without experiencing frequency Nadir, which largely improves frequency security. We prove that our grid-forming frequency-shaping control renders the system internally stable under mild assumptions. The performance of the proposed control is verified via numerical simulations on a modified Icelandic Power Network test case.

Published
2021
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