基于系统运行模拟的抽水蓄能变速机组容量配比优化研究

摘要

抽水蓄能机组对于保障电力系统安全、稳定、高效运行作用显著,特别是抽水蓄能变速机组,具有抽水功率可调、运行效率提升和调节范围加宽等优势.考虑到抽水蓄能变速机组投资成本相比恒速机组较高,进行变速机组容量配比优化研究十分必要.本文建立基于电力系统安全约束机组组合的抽水蓄能变速机组容量配比优化模型,可以在给定的区域电源规划方案下,给出新建变速机组占所有新建抽水蓄能机组的经济最优比例.针对西部某区域的算例分析表明,新建抽水蓄能变速机组容量配比在33％左右时,系统运行效益最优.%The pumped-storage power units,especially variable speed units,have great roles in guaranteeing power system operation safety,stability and efficiency.As the investment cost of pumped-storage variable speed unit is higher than fixed speed unit,it is necessary to study its scale optimization.A scale optimization model for variable speed units is built based on power system security constrained unit combination model,which can demonstrate the most economic scale of variable speed units in all new pumped-storage power units under a given power supply planning.A calculation example of a west region in China shows that the power system will has a best operation benefit when the capacity share of newly-built pumped-storage variable speed units is about 33％.