Robust multi-objective optimization for islanded data center microgrid operations

Yicheng Lian, Yuanzheng Li, Yong Zhao, Chaofan Yu, Tianyang Zhao, Lei Wu

Research output: Contribution to journalArticlepeer-review

Abstract

Electricity cost has become a critical concern of data center operations with the rapid increasing of information processing demand. Data center microgrid (DCMG) is a promising way to reduce electric energy consumption from traditional fossil fuel generators and the billing cost, by effectively utilizing local renewable energy, e.g., wind power. However, uncertainties of wind power generation and real-time workload of data center would have significant impacts on the operational efficiency of DCMG, especially when it is in the island mode. For this reason, a novel affinely adjustable policy based robust multi-objective optimization model under flexible uncertainty set is proposed in this paper, which simultaneously optimizes wind power curtailment, the operation cost, and the over-plus level of computation resource, while considering uncertainties of both the wind power and real-time workload. Through numerical simulation studies, the validity of robust multi-objective optimization model for the island operation of DCMG is verified. Besides, the effectiveness of the proposed methods, i.e., the novel affinely adjustable policy and the flexible uncertainty set, in handling uncertainties are evaluated. Compared to the conventional robust multi-objective optimization model, the proposed approach reduces the operating costs of about 10% in average while maintaining similar reliability in numerical simulations. Moreover, the complex quantitative relationship among these multiple objectives is further investigated. Simulation results indicate the minimization of wind power curtailment and over-plus level of computation resource increases about 25% of the operation cost. These quantitative relationships can well support the decision making of DCMG operation management.

Original languageEnglish
Article number120344
JournalApplied Energy
Volume330
Issue numberPart B
Early online date24 Nov 2022
DOIs
Publication statusPublished - 15 Jan 2023

Keywords

  • Affinely adjustable policy
  • Data center microgrid
  • Flexible uncertainty set
  • Robust multi-objective optimization

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering
  • Energy(all)
  • Management, Monitoring, Policy and Law

Fingerprint

Dive into the research topics of 'Robust multi-objective optimization for islanded data center microgrid operations'. Together they form a unique fingerprint.

Cite this