快速响应负荷需求的大规模水电站群超短期调度模型

Rapidly Response Load Demand of Large-scale Hydropower Plants Ultra-short Term Scheduling Model

针对日前负荷和来水预测存在偏差导致日前短期发电计划应用于实时调度时,期末水位很难达到预控目标以及弃水、窝电等问题,提出快速响应负荷需求的跨流域水电站群超短期调度模型及求解方法。该模型以调度期末水位与理想水位相对偏差最大值最小为目标,利用更新、更准确的实时水情和负荷边界信息对日前制定的短期发电计划进行校验和滚动修正,较好地解决短期调度计划难以应用于实时调度的难题。以云南澜沧江、金沙江、大盈江和李仙江干流梯级水电站群为研究对象,结果表明提出的超短期模型在保证电网负荷末来数小时内电力平衡的同时,使24时水位向预控目标逼近,为次日的发电计划制定提供有力保障,也为水电超短期调度决策提供科学依据,提高云南电网水电精细化调度水平。

In view of the low accurate day-ahead load forecasting and inflow forecasting,the water level of hydropower plant is very difficult to reach anticipated target value when the short-term generation scheduling is applied to the real-time scheduling.And spilling water and hydropower crowded problems are very serious.Therefore,this paper presented a rapidly response load demand of large-scale hydropower plants ultra-short term scheduling model.The object is to minimize the deviations of target water level of hydropower plants.The main strategy is to verify the short-term scheduling and rolling correction according to the real-time hydrology and load information.The model was demonstrated using cascade hydropower plants on Lancang River,Jinsha River,Dayingjiang River and Lixianjiang River.The results showed that proposed model can balanced load within a few hours to in the future and close to target water levels.It will be a good decision-making basis for the large-scale hydropower plants ultra-short term scheduling and raise the level of hydropower system refinement scheduling.