Power grid cost optimization considering the gridconnection of renewable energy
LI Chenguang
CHAI Zhanjun
ZHANG Jiahui
LI Chao
SHAO Yubo
WU Yanrui
ZHAO Xiaoli
Abstract：Large-scale renewable energy integration has become an imperative under the"Dual Carbon" targets.The impact of renewable energy integration on power system operating costs arises from two key factors:renewable energy output variability and capacity expansion.To investigate these effects,this study first simulates power system operations under three scenarios:baseline,energy storage-assisted peak shaving,and integrated wind-PV-storage coordination.Subsequently,a Graver 6-node test system is employed for simulation analysis to examine cost variations under increasing renewable volatility and capacity growth.The findings demonstrate that renewable output variability elevates total system costs and amplifies cost fluctuations through environmental externalities and curtailment penalties.The cost impact of capacity expansion is constrained by peak-shaving strategies and penetration levels.For regions in early-stage renewable integration,hybrid energy storage with wind-PV complementarity should be prioritized for peak regulation.In rapidly developing areas,annual renewable capacity growth should be capped at 80％of baseline values while maintaining this coordinated approach.
Keywords：renewable energyoperating coststored energywind power and photovoltaic complementaritypower cost
Publication Date：2025-12-28
Online Publishing Date：2026-01-30(First online date of this platform, not the publication date of the document)
Pages：9( 6-14 )