大规模水电系统短期调峰电量最大模型及其求解

针对国内短期水电系统发电调度中较常用的调峰电量最大目标函数，给出了一种替代目标函数的基本形式，并对其合理性进行了理论探讨。设计了周期性模型，用于确定各水库的滞时区出库流量和调节性能较差水库的控制期末水位。采用改进的直接搜索法求解考虑水流滞时情况下的短期水电站群发电优化调度问题。设计了一个尽可能避免弃水的局部修正策略，考虑了电站出力波动、开停机持续时间、开停机次数、出力运行区域、系统容量备用等约束。结合福建水电系统的实际情况，对提出的短期调峰电量最大模型进行了验证。

SHORT-TERM GENERATION SCHEDULING FOR THE PEAK-ENERGY MAXIMIZATION OF LARGE-SCALE HYDROPOWER SYSTEMS

For the objective function of maximizing the peak-energy, which is frequently used for short-term hydropower scheduling in China, this paper proposes a computational advantageous alternative form of the initial objective function, of which the rationality is mathematically discussed. A periodicity model is designed to estimate the end-of-study contents of the reservoirs with short-live storage and the delay releases from upper reservoirs. An improved direct search method is used to solve the short-term hydropower-scheduling problem with the delay time between interconnected reservoirs taken into account. A policy to avoid spillage as small as possible is designed, and the constraints on plant-based power ramp, minimum up/down time, up/down frequency, running scope, capacity reserve for hydropower system, etc. are taken into account. With Fujian hydropower systems as an example, the formulated model for the peak-energy maximization is practically tested.