金沙江下游梯级电站中长期调度精细化出力计算方法

Refined Hydropower Calculation for Long-term Dispatch in Downstream Cascade Hydro Station of Jinshajiang River

为满足金沙江下游梯级电站中长期精细化调度对水能计算的高精度要求,从基于最优流量分配的全站经济运行总表入手,分析了最优流量分配表在中长期水能计算中的适用性,推求了考虑电站日运行方式的中长期最优流量分配表,并在分析其特性的基础上提出了基于"最小点-调峰上临界点-调峰下临界点-最大点"的中长期精细化出力计算方法。该计算方法不仅实现了金沙江下游梯级电站中长期调度精细化水能计算,也为其他装机容量大、可运行水头范围广的大型电站中长期精细化出力计算提供了参考。

In order to meet hydropower plant urgent needs for refined hydropower calculation,this paper proposes a refined hydropower calculation method for long-term dispatch model in cascade hydro station of downstream Jinshajiang River.The paper firstly discussed the applicability of the optimal allocation of units in long-term dispatch model.And then a modified optimal allocation of units is proposed considering the hydropower daily operation mode.On account of the weakness of the proposed optimal allocation of units,a refined hydropower calculation method based on ‘minimum point-upper peak shaving point-down peak shaving point-maximum point＇is put forward,which turns out to be a potential method to calculate hydropower in long-term dispatch model accurately.