水电厂经济运行的优先表动态规划方法

A Priority Dynamic Programming Method for Hydropower Plants

基于常规动态规划方法,将负荷最优分配与开停机组合寻优过程同时在线计算,机组组合方案按参与运行的机组台数递增选取,最优负荷分配亦随机组台数递推,排除不符合日发电计划中负荷要求的机组组合,以流量最小为优先原则,存储有限项可行组合,减少中间数据存储,降低寻优维数,缩短计算时间,适合机组特性数据经常变化的要求。对12台机组的实例计算表明,合理选择有限项的个数,可较快地解算出最优开停机计划。

A priority-list's DP method based on the general DP is described. An on-line calculating process of unit commitment together with load distribution is given. In the process, the unit combinations are selected according to the increase of the number of machines. The load distribution is also obtained recursively on the number of units. The unit combinations, which are not matched to the daily generation schedule, are avoided. The number of combination strategies, which are sorted in priority of volume of flow, is reduced. By use of the method, the storage of temporary data is decreased, the range of finding the optimal result is reduced, and the computing time is shortened. The method also suits the variation of the unit characteristics. The results of application to a 12-unit system show that the optimal unit commitment schedule can be obtained fast by rationally choosing the number of priority-list strategies.