A distributed control scheme for voltage regulation in DC distribution systems

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Abstract

In this paper, a distributed control scheme is proposed to mitigate the challenges of voltage regulation in DC distribution systems and facilitate high penetration of distributed and renewable energy resources. The proposed control scheme consists of two main stages. In the first stage, a distributed state estimation algorithm is implemented to estimate the voltage profile in a DC distribution system and enhance the AC/DC converter operation in order to keep the system voltage within its specified limits. Further, in case of occurrence of voltage violation that cannot be handled by the AC/DC interfacing converter a reconsideration of power management would take place. Thus, in the second stage, a distributed power management optimization problem is formulated to maximize the total DGs' revenue; while keeping the voltages of all system buses within limits. The formulated problem is classified as a convex optimization problem under global constraints. A distributed Lagrangian Primal-Dual Subgradient (DLPDS) algorithm that is superior in solving such optimization problems is proposed in this work.

Original languageBritish English
Title of host publication2014 IEEE PES General Meeting / Conference and Exposition
PublisherIEEE Computer Society
EditionOctober
ISBN (Electronic)9781479964154
DOIs
StatePublished - 29 Oct 2014
Event2014 IEEE Power and Energy Society General Meeting - National Harbor, United States
Duration: 27 Jul 201431 Jul 2014

Publication series

NameIEEE Power and Energy Society General Meeting
NumberOctober
Volume2014-October
ISSN (Print)1944-9925
ISSN (Electronic)1944-9933

Conference

Conference2014 IEEE Power and Energy Society General Meeting
Country/TerritoryUnited States
CityNational Harbor
Period27/07/1431/07/14

Keywords

  • DC distribution systems
  • decentralized optimization
  • multi-agent
  • voltage regulation

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