基于两阶段优化的风储联合发电系统日前发电计划模式

考虑风电日波动性对常规机组启停的影响,为准确刻画系统运行经济性与风电消纳能力的关系,设计了风电最大出力模式、经济运行模式和运行成本控制模式3种风储联合发电系统日前发电计划模式,提出了不同模式的两阶段优化模型及快速求解算法。第1阶段通过储能系统和常规机组协调调度,实现经济性最优或弃风量最小的目标,第2阶段优化则按照经济调度和"三公"调度的原则分配常规机组和风电场的有功出力。提出快速算法削减了模型的寻优空间,大幅提高了优化模型的求解效率。基于IEEE 30节点系统进行仿真分析,验证了所述模型和算法的优越性。

Day-ahead Generation Scheduling Plan Modes for Large-scale Wind-Storage Combined Power Generation System Based on Two-stage Optimization

Considering impacts of wind power daily volatility on the unit commitment of conventional thermal generators, this paper designs three different day-ahead generation scheduling plan modes: maximum wind power output mode, economic operation mode and operation costs control mode. The two-stage optimization models for different scheduling modes and a novel algorithm are also presented. The proposed models can describe the connection between the operation costs and wind power integration capability. The first stage optimization is to minimize the operation costs or wind power curtailments, and the second stage optimization is to allocate load between conventional thermal generators and wind-storage combined generation stations based on fairness and economic principles. A modified IEEE 30-bus system with three actual wind farms is used for verification purposes.This work is supported by National High Technology Research and Development Program of China (863 Program) (No. 2011AA05A112).