A method for quantifying the short-term flexibility of hydropower in clean energy bases considering water flow delay
Clean energy bases are crucial providers for the flexibility of power systems.However,responding to flexibility demands,the implementation of hierarchical hydropower plans is affected by complex hydraulic spatio-temporal connections such as water flow delays,which lead to significant deviations across different time periods,greatly increasing the risks associated with scheduling.Accurately quantifying the flexibility of hydropower stations while ensuring their safe operation poses a pressing challenge.In this paper,a short-term flexibility quantification model and solution method are developed for hierarchical hydropower in clean energy bases considering water flow delays.The model incorporates the cumulative effects of delay-induced deviations and reconstructs the stochastic constraints based on dual theory for efficient solving.The proposed model simultaneously determines the flexibility and flexibility support modes of hierarchical hydropower under the influence of water flow delays.Using a clean en-ergy base with six reservoirs in Southwest China as a case study,the paper conducts multi-scenario simulations and parameter sensitivity analyses for flexibility quantification and implementation.The results indicate that the proposed method can accurately quantify the flexibility of hierarchical hydropower under the influence of water flow delays,en-suring the safe execution of the flexibility supply process.This method is applicable to actual scheduling work.
flexibility quantifywater flow delaysflexibility supportduality theory
万方数据
维普
