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对有复杂水力系统的大型水电厂,其厂内优化运行问题是一个非线性组合优化问题。在上游水位和负荷水平一定的情况下,如何确定最优的机组组合、给出最优机组功率和用水量的分配,是实际运行中难点所在。文中考虑了各种非线性特性和复杂的耦合关系,建立了该问题的数学模型,推导了最优性条件和广义等耗水微增原则,提出了相应的快速算法,可在线和离线应用。根据建议的方法开发了用于实际系统的软件,表明了所述方法的正确性和有效性。
For large hydropower plants with complex hydraulic systems, the optimal operation of the plant is a nonlinear combinatorial optimization problem. In the case of a certain level of upstream water level and load, how to determine the optimal unit combination and give the distribution of the optimal unit power and water consumption are the difficulties in practical operation. In this paper, various non-linear characteristics and complex coupling relations are considered. The mathematical model of the problem is established. The principle of optimality condition and generalized water consumption increase are deduced. A corresponding fast algorithm is proposed, which can be applied online and offline. The software developed for the actual system was developed according to the proposed method, demonstrating the correctness and validity of the method.