Unit commitment with AC power flow constraints for a hybrid transmission grid

L. P.M.I. Sampath, M. Hotzt, H. B. Gooi, W. Utschick

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

A unit commitment formulation satisfying AC optimal power flow constraints models the resource optimization problem accurately, but is challenging to solve for traditional transmission systems. Integration of generation based on renewable energy sources is often limited by transmission congestion issues in existing grids. For such grids, AC to HVDC conversion schemes are viable and attractive options for capacity expansion. In this respect, we utilize the structural properties of a hybrid AC/HVDC grid architecture with a specific topology to enable an exact mixed integer conic relaxation of the aforementioned problem. The simulation results for the PJM 5-bus system show that the relaxation is exact for the hybrid architecture. Further, it alleviates the network congestion leading to a substantial reduction in generation cost at normal and increased load conditions compared to the reference AC grid. Moreover, the hybrid architecture improves the utilization of the grid to accommodate more demand and generation.

Original languageEnglish
Title of host publication20th Power Systems Computation Conference, PSCC 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781910963104
DOIs
StatePublished - 20 Aug 2018
Event20th Power Systems Computation Conference, PSCC 2018 - Dublin, Ireland
Duration: 11 Jun 201815 Jun 2018

Publication series

Name20th Power Systems Computation Conference, PSCC 2018

Conference

Conference20th Power Systems Computation Conference, PSCC 2018
Country/TerritoryIreland
CityDublin
Period11/06/1815/06/18

Keywords

  • Capacity expansion
  • Convex relaxation
  • Mixed-integer second order cone program
  • Optimal power flow
  • Unit commitment

Fingerprint

Dive into the research topics of 'Unit commitment with AC power flow constraints for a hybrid transmission grid'. Together they form a unique fingerprint.

Cite this