Chance-Constrained Optimization for Multi Energy Hub Systems in a Smart City

Da Huo, Chenghong Gu, Kang Ma, Wei Wei, Yue Xiang, Simon Le Blond

Research output: Contribution to journalArticle

18 Citations (Scopus)
153 Downloads (Pure)

Abstract

The energy hub is a powerful conceptualization of how to acquire, convert, and distribute energy resources in the smart city. However, uncertainties such as intermittent renewable energy injection present challenges to energy hub optimization. This paper solves the optimal energy flow of adjacent energy hubs to minimize the energy costs by utilizing the flexibility of energy resources in a smart city with uncertain renewable generation. It innovatively models the power and gas flows between hubs using chance constraints, thus permitting the temporary overloading acceptable on real energy networks. This novelty not only ensures system security but also helps reduce or defer network investment. By restricting the probability of chance constraints over a specific level, the energy hub optimization is formulated as a multiperiod stochastic problem with the total generation cost as the objective. Cornish-Fisher expansion is utilized to incorporate the chance constraints into the optimization, which transforms the stochastic problem into a deterministic problem. The interior-point method is then applied to resolve the developed model. The proposed chance-constrained optimization is demonstrated on a three-hub system and results extensively illustrate the impact of chance constraints on power and gas flows. This work can benefit energy hub operators by maximizing renewable energy penetration at the lowest cost in a smart city.

Original languageEnglish
Pages (from-to)1402-1412
Number of pages11
JournalIEEE Transactions on Industrial Electronics
Volume66
Issue number2
Early online date14 Aug 2018
DOIs
Publication statusPublished - 28 Feb 2019

Keywords

  • Chance-constrained programming (CCP)
  • Cornish-Fisher expansion
  • energy hub
  • optimal flow

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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