FUZZY LINEAR-PROGRAMMING - AN APPLICATION TO HYDROELECTRIC GENERATIONSCHEDULING

A new approach using fuzzy linear programming is proposed for solving the hydroelectric generation scheduling problem. A characteristic feat ure of this approach is that the errors in the forecast hourly loads a nd natural inflows can be taken into account by using fuzzy set notati on, making the approach superior to the conventional linear programmin g method in which the hourly loads and natural inflows are assumed to be exactly known and there are no errors in the forecast loads and nat ural inflows. To reach an optimal schedule under the uncertain environ ment, a fuzzy linear programming model in which the hourly loads, the hourly natural inflows and the cost are all expressed in fuzzy set not ations is developed. The developed fuzzy linear programming approach i s applied to schedule the generation in the Taiwan power system which contains ten hydroplants including cascaded ones. It is found that the proposed approach is very effective in obtaining proper hydrogenerati on schedules in uncertain conditions.