三峡梯级和清江梯级水电站群联合调度研究

Joint operation of the Three Gorges cascade reservoirs and the Qingjiang cascade reservoirs

开展对三峡梯级和清江梯级巨型混联水电站群优化调度研究,分别建立了以发电量最大和以发电效益最大为目标的水电站群联合调度模型,采用POA算法分别计算两个梯级单独运行和梯级联合运行在两种准则下的库容和电力补偿效益。选择1982-1987连续水文周期年的日径流资料进行计算,并与原设计方案相比,两种准则下联合调度的系统年平均发电量分别增加了60.90亿kW.h和60.71亿kW.h,年发电效益分别增加了14.37亿元和14.70亿元;在以发电量最大为准则的情况下,三峡梯级和清江梯级的弃水量分别减少了566.88亿m3和36.73亿m3,系统年均发电量增加了5.80%,库容补偿效益显著。

The joint operation,of the Three Gorges cascade reservoirs and the Qingjiang cascade reservoirs was studied in this paper.Optimal models were established with objective functions to maximize power generation and to maximize power benefits,respectively,for individual and joint operation of cascade reservoirs.The models were optimized by a progressive optimization algorithm,and the storage and electric compensation benefits were analyzed.A case study using the daily runoff data of hydrological years 1982-1987 indicates that,compared with regular operation,the joint operation of five reservoirs increases the annual yield by 6.090 and 6.071 billions kW.h or the annual benefit by 1.437 and 1.470 billions Yuan by the two objective functions,respectively.Through storage compensation and power yield maximizing,the volume of wasted water by the Three Gorges cascade and the Qingjiang cascade was decreased by 56.688 and 3.673 billions m3,respectively,and the annual yield was increased by 5.8%.