基于线性规划的梯级水电系统短期发电计划

建立了基于线性规划的梯级水电系统短期发电计划通用模型。该模型不仅考虑了电厂间的水力与电力联系，也考虑了诸如水流流达时间及流量变化率约束等，水头变化的影响则通过迭代消除。同时，线性化逼近技术使得新约束的加入不会改变模型的整体结构。采用Karmarkar内点算法求解该规划问题，加快了计算速度，计算结果表明所建立的模型是正确而有效的。考虑水价使得该模型能扩展到电力市场竞争环境中。

LINEAR PROGRAMMING-BASED SHORT-TERM GENERATION SCHEDULING FOR CASCADE HYDROPOWER SYSTEMS

A general model based on linear programming for short-term generation scheduling of cascade hydroelectric systems is proposed. The model considers not only the hydraulic and electric relations among hydropower plants, but also water arriving time and the rate of change of water flow. The effect of water head variation is eliminated by iteration. And the whole structure of the model will not be changed with adding new constraints because of the use of linearized approximation technique. The Karmarkar interior point algorithm is used to solve the programming problem, and calculation is accelerated. Test results show that the proposed model is correct and efficient. The model can also be applied to electricity market when water price is considered.