水电站动态发电模型

为了揭示水电站功率输出与发电流量及水头损失间的动态变化过程,将水库水体分成长方形水体s1、梯形水体tr、长方形水体s2及三角形水体t等4级,运用牛顿运动定律,分析了压力引水管水体受力情况,推导压力引水管水体动态运动方程,综合考虑压力引水管水头损失及水锤压力的影响,建立了水电站动态发电模型.仿真结果表明,模型动态揭示了水电站在发电过程中的水位、流量、水力损失水头等参数间的相互影响关系及其对机组功率输出的影响,揭示了水电站最优发电功率输出与水头变化的动态变化过程,为未来水电站设计更优化的控制调度系统提供新的研究思路.

Modeling dynamic generation of hydropower plants

In order to model dynamic generation of hydropower plants and reveal the inner law among output power, generation flow and water losses. The reservoir water body is divided into four types : rectangle water sl, trapezoid water tr, rectangle waters s2 and triangle t. The forces acting on the water body in penstock are analyzed by applying Newton's law of motion while the water body dy-namical motion equation in penstock is deduced, then the dynamical generation model of cascaded reservoirs hydropower plant is developed by synthetically take the penstock water losses and the wa-ter hammer pressure into account. The simulation results illustrate that the model can effectively re-veal dynamical interaction among the water level, the generation flow and the water losses, so reveal the influence on the generation output power by these parameters. The simulation results also dy-namically reveal the transferring course of hydraulic energy among the hydropower plants and the dy-namical variation between the optimized output power of hydropower plant and the water level. The model can offer a new designing method during the course of designing a optimal control system for hydropower plant than ever.