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

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3 Author(s)
Wang, D.T.-C. ; Inst. for Energy Syst., Univ. of Edinburgh, Edinburgh, UK ; Ochoa, L.F. ; Harrison, G.P.

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 multistage 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.

Published in:

Power Systems, IEEE Transactions on  (Volume:25 ,  Issue: 2 )