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Optimal Discrete Net-Load Balancing in Smart Grids with High PV Penetration

Published: 27 November 2018 Publication History

Abstract

Mitigating supply-demand mismatch is critical for smooth power grid operation. Traditionally, load curtailment techniques such as demand response have been used for this purpose. However, these cannot be the only component of a net-load balancing framework for smart grids with high PV penetration. These grids sometimes exhibit supply surplus, causing overvoltages. Currently, these are mitigated using voltage manipulation techniques such as Volt-Var Optimizations, which are computationally expensive, thereby increasing the complexity of grid operations. Taking advantage of recent technological developments that enable rapid selective connection of PV modules of an installation to the grid, we develop a unified net-load balancing framework that performs both load and solar curtailment. We show that when the available curtailment values are discrete, this problem is NP-hard and we develop bounded approximation algorithms. Our algorithms produce fast solutions, given the tight timing constraints required for grid operation, while ensuring that practical constraints such as fairness, network capacity limits, and so forth are satisfied. We also develop an online algorithm that performs net-load balancing using only data available for the current interval. Using both theoretical analysis and practical evaluations, we show that our net-load balancing algorithms provide solutions that are close to optimal in a small amount of time.

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Published In

cover image ACM Transactions on Sensor Networks
ACM Transactions on Sensor Networks  Volume 14, Issue 3-4
Special Issue on BuildSys'17
November 2018
392 pages
ISSN:1550-4859
EISSN:1550-4867
DOI:10.1145/3294070
Issue’s Table of Contents
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Association for Computing Machinery

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Publication History

Published: 27 November 2018
Accepted: 01 May 2018
Revised: 01 April 2018
Received: 01 January 2018
Published in TOSN Volume 14, Issue 3-4

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Author Tags

  1. Net-load balancing
  2. approximation algorithms
  3. discrete curtailment
  4. smart grid

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  • Refereed

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  • Department of Energy (DoE)
  • US National Science Foundation

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  • (2024)Flexible energy utilization potential of demand response oriented photovoltaic direct-driven air-conditioning system with energy storageEnergy and Buildings10.1016/j.enbuild.2024.114818(114818)Online publication date: Sep-2024
  • (2023)Distributed rate control of smart solar arrays with batteriesFrontiers in the Internet of Things10.3389/friot.2023.11293672Online publication date: 28-Jun-2023
  • (2023)Behind-the-Meter Solar Generation Disaggregation at Varying Aggregation Levels Using Consumer Mixture ModelsIEEE Transactions on Sustainable Computing10.1109/TSUSC.2022.31924568:1(43-55)Online publication date: 1-Jan-2023
  • (2020)Disaggregation of Behind-the-Meter Solar Generation in Presence of Energy Storage Resources2020 IEEE Conference on Technologies for Sustainability (SusTech)10.1109/SusTech47890.2020.9150506(1-7)Online publication date: Apr-2020
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