DG Impact on Investment Deferral: Network Planning and Security of Supply

David T. -C. Wang, Luis F. Ochoa, Gareth P. Harrison

Research output: Contribution to journalArticlepeer-review


Despite the technical challenges in properly accommodating distributed generation (DG), one of the major and well-recognized benefits is the ability of DG to defer future demand-related network investment. It is, however, often poorly represented in existing planning approaches and analysis ignores the potential security of supply benefits. Here, a novel, more integrated, approach is presented wherein reinforcements required by system security standards (e.g., N - 1) are also taken into account. The DG contributions to system security provided by U. K. Engineering Recommendation P2/6 are adopted, enabling the methodology to quantify the deferment produced by DG considering both demand growth- and system security-related investment. The methodology employs the successive elimination algorithm together with multi-stage planning and is applied to a generic, meshed, U.K. distribution network. Results show that, despite differences between technology types, significant economic benefits can be harnessed when strategically incorporating DG at the planning stage.

Original languageEnglish
Pages (from-to)1134-1141
Number of pages8
JournalIEEE Transactions on Power Systems
Issue number2
Publication statusPublished - May 2010


  • Distributed generation
  • distribution networks
  • investment deferral
  • planning


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