Optimization Configuration Method for Energy Storage Considering Frequency Stability of New Energy Bases Without Conventional Power Supply Support on Site
The primary model for promoting large-scale development of new energy is the construction of wind-solar-storage bases in deserts,Gobi regions,and desertified areas.However,in the scenario where there is no conventional power supply on site,the coordination ability between new energy power generation and DC is insufficient,and the frequency of the base is instable.In a new energy base dominated by control,this paper constructs reasonable virtual inertia based on the operating characteristics of wind-solar-storage,further explores the influence of grid-following control(GFL)and grid-forming control(GFM)on the frequency response,and establishes a frequency response model for various control strategies.Energy storage power plants have great advantages in fast frequency response and flexibility to adjust new energy fluctuations.In the energy storage planning model,an energy storage optimization configuration method considering DC operation mode is proposed,and frequency stability safety constraints are embedded in typical operating scenarios.This article validates the rationality and effectiveness of the proposed model based on the planning guidelines for new energy bases in Northwest China,and further analyzes the impact of frequency indicators,DC operation mode,GFM and GFL control strategies for each station on energy storage configuration;the proposed energy storage planning method not only achieves economical allocation,but also ensures the stability of the frequency of the base,providing a new idea for energy storage configuration in the scenario where there is no conventional power supply support on site.
no regular power support on sitelarge-scale direct current deliverynew energy bases frequency stabilityvirtual inertiaenergy storage planning
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