Load Center Calculation and Substation Site Selection Considering Uncertainty of Distributed Power Sources
DOI:
https://doi.org/10.13052/dgaej2156-3306.4151Keywords:
Substation, distributed power supply, uncertainty, load center, site selectionAbstract
The integration of high-penetration distributed generation changes spatial load distribution from static demand dominance to bidirectional source-load fluctuation, making traditional fixed load-moment planning insufficient to balance positioning accuracy, investment redundancy, and low-carbon accommodation. Therefore, a DLC-FCS model integrating probabilistic DG output correction, dynamic load-center calculation, weighted Voronoi service boundaries, and fuzzy comprehensive evaluation is constructed. The case results show that the comprehensive load-center positioning error decreases from 594.3 m to 483.2 m, with a reduction of 18.7%. The total planning cost decreases from USD 20.55 million to USD 18.02 million, with a reduction of 12.3%. Meanwhile, renewable energy accommodation increases by 13.7%, and carbon emissions and average outage duration decrease by 14.4% and 35.6%, respectively. This not only significantly reduces system investment costs to improve power supply reliability, but also reduces environmental pollution. This research provides power system planners with an effective tool to deal with the challenges brought by the uncertainty of distributed power sources and achieve economical, reliable and sustainable development of the power system.
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