Using Piecewise Linearization Method to PCS Input/Output-Efficiency Curve for a Stand-Alone Microgrid Unit Commitment

Lee, Ha-Lim; Chun, Yang Sook

doi:10.3390/en11092468

Cited by 5 publications

(2 citation statements)

References 22 publications

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“…The MILP method of calculation is assumed to be accurate for the grid operation issues in [25] and [26]. For applying scheduling problems to MILP, a piecewise linear technique is utilized to calculate diesel power generation cost.…”

Section: Formulation For Milp Of Conventional Microgrid Schedulingmentioning

confidence: 99%

Energy Curtailment Scheduling MILP Formulation for an Islanded Microgrid with High Penetration of Renewable Energy

et al. 2021

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The efficiency of photovoltaic (PV) cells has improved significantly in the last decade, making PV generation a common feature of the sustainable microgrid. As the PV-powered microgrid reaches high penetrations of intermittent PV power, optimum scheduling of over-production is necessary to minimize energy curtailment. Failure to include an accurate assessment of curtailed energy costs in the scheduling process increases wasted energy. Moreover, applying an objective function without considering the cost coefficients results in an inefficient concentration of curtailed power in a specific time interval. In this study, we provide an optimization method for scheduling the microgrid assets to evenly distribute curtailment over the entire daily period of PV generation. Each of the curtailment intervals established in our optimization model features the application of different cost coefficients. In the final step, curtailment costs are added to the objective function. The proposed cost minimization algorithm preferentially selects intervals with low curtailment costs to prevent the curtailment from being concentrated at a specific time. By inducing even distribution of curtailment, this novel optimization methodology has the potential to improve the cost-effectiveness of the PV-powered microgrid

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Section: Formulation For Milp Of Conventional Microgrid Schedulingmentioning

confidence: 99%

Energy Curtailment Scheduling MILP Formulation for an Islanded Microgrid with High Penetration of Renewable Energy

et al. 2021

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“…By solving the optimization, the total day-ahead schedule data for the electric power import/export from/to the connected power system, input/output of the PCS and diesel generator, charge/discharge amount of BESS, and the electric power that critical and non-critical loads have absorbed, are obtained. The diesel generator fuel cost at time t and start-up cost is referred by [28].…”

Section: B Milp Optimization Formulationmentioning

confidence: 99%

An Energy Management System With Optimum Reserve Power Procurement Function for Microgrid Resilience Improvement

et al. 2019

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Power system decentralization has been an emerging topic for the past decade in an effort to improve power quality and environment protection via the increased integration of renewable energy sources. Toward these objectives, decentralized microgrids have been proposed and thoroughly investigated in terms of technical capabilities and economic performance. In fact, the planning and actual operation of small-scale, decentralized microgrids have started in countries, such as Canada, Japan, USA, U.K., and other countries. It is expected that the research in this area will progress and eventually take over the existing paradigm of large-scale power generation in the future. These small-size decentralized microgrids could be connected with nearby microgrids under normal operating conditions, but under special events, such as natural or man-made disasters, they would be disconnected and run in an islanded mode. Under such a high impact, low probability events, the microgrid must have the resiliency to successfully reconnect with other microgrids and the main grid. In this paper, an energy management system (EMS) for a microgrid having a resiliency function, allowing to operate under the islanded mode after an accident, is proposed. The proposed tool, called Resilient Energy Management System (ResEMS), aims at procuring reserve power into the microgrid's battery energy storage system (BESS) effectively, by importing it from the nearby connected power system. The quantity of power to be imported is decided considering the value of the load, photovoltaic device generation, and the state of charge (SOC) of BESS. The accident is assumed to be a predictable natural disaster, which means that the accident occurrence date or time period can be estimated. The proposed ResEMS has been applied to a microgrid comprising of a BESS, a diesel generator, and several photovoltaic devices. The simulation results verify its beneficial operation. INDEX TERMS Energy management system, reserve power, resiliency, battery energy storage system.

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Integrating Battery Energy Storage Systems in the Unit Commitment Problem: a Review

Olivos,

Valenzuela

2023

Curr Sustainable Renewable Energy Rep

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Using Piecewise Linearization Method to PCS Input/Output-Efficiency Curve for a Stand-Alone Microgrid Unit Commitment

Cited by 5 publications

References 22 publications

Energy Curtailment Scheduling MILP Formulation for an Islanded Microgrid with High Penetration of Renewable Energy

Energy Curtailment Scheduling MILP Formulation for an Islanded Microgrid with High Penetration of Renewable Energy

An Energy Management System With Optimum Reserve Power Procurement Function for Microgrid Resilience Improvement

Integrating Battery Energy Storage Systems in the Unit Commitment Problem: a Review

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