考虑短时线路动态增容的多区域电网备用优化OA

[Objective]To address source-load fluctuations in systems with high-penetration renewable energy,the rational arrangement and effective dispatch of power reserves should be ensured.Given this background,a multi-area power grid reserve optimization method considering short-term dynamic line rating(SDLR)is proposed.[Methods]Firstly,a network-wide source-load fluctuation scenario based on chance constraints is constructed.By pre-scheduling regional reserve capacity to guarantee the regulation capability of each area,network-wide and regional risk coordination is achieved.Secondly,an intra-day reserve optimization method considering SDLR and demand-side resources is proposed to realize the efficient utilization of line transmission capacity and ensure the effectiveness of reserve dispatch.Finally,the proposed method is verified and analyzed using a simplified provincial transmission network.[Results]The result demonstrate that by integrating SDLR,the actual reserve dispatch ratio increases from 4.73%under traditional static security constraints to 20.06%,and the system operation risk cost is reduced by 58.3%.[Conclusions]The proposed method can mitigate line congestion and reduce the risks of load shedding and renewable energy curtailment,effectively improving the power supply reliability and operational economic efficiency of multi-area power grids.