A reliability-aware chance-constrained battery sizing method for island microgrid. (15th July 2022)

• Record Type: Journal Article
• Authors: Huo, Da; Santos, Marcos; Sarantakos, Ilias; Resch, Markus; Wade, Neal; Greenwood, David
• Is Part Of: Energy. Volume 251(2022)
• Publication Date: 2022-07-15
• Subjects: Battery sizing -- BESS -- Chance-constrained programming -- Distribution system -- Island microgrid -- Reliability -- Second-order cone programming; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2022.123978
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: Island Microgrids can coordinate local energy resources, provide post-fault reliability improvements for local customers, and aggregate local power and energy resources to offer services to the wider system. A crucial component of an Island Microgrid is the battery energy storage system, which can manage local imbalances, alleviate constraints, and improve reliability by enabling post-fault islanding. A planning and sizing method is required to quantify and maximize the benefits of battery energy storage while avoiding over-investment and under-utilization. This paper combines comprehensive reliability assessment with chance-constrained convex optimization, via second-order cone programming, to optimally size energy storage within an Island Microgrid. Chance constraints are applied to the battery state-of-charge to avoid sizing the energy storage to accommodate extreme cases of uncertainty, avoiding uneconomic investment. The probability of reaching a state-of-charge constraint also indicates the likelihood that the battery energy storage system will be unable to facilitate island operation in the event of an outage, which affects the Island Microgrid reliability. The method is demonstrated on a real Austrian distribution network as part of the MERLON project. Results illustrate that an optimal trade-off can be identified between system reliability and operating cost when the probability of violating the chance constraints is 4.8%. Highlights: A comprehensive battery sizing scheme for Island Microgrid. Novel integration of reliability assessment into sizing problems. Chance constraints enable an optimal trade-off between reliability and profits. Demonstration on an Austrian distribution system as part of the MERLON project.