乌江梯级水库联合优化调度方案研究

为寻求适合乌江梯级水库群最大发电效益的联合调度方式,对常用的梯级水库联合调度方式、模型建立进行了综合分析,提出以梯级蓄能调度图为指导,辅以水库蓄供水控制线为约束的联合调度方式,并给出了绘制梯级蓄能调度图的方法和步骤。实例分析结果表明,该方法不仅能合理控制水库蓄放水次序和蓄放水量,且调度条件简单,运行灵活,可有效增加梯级总发电效益,具有较好的实际应用前景。

梯级水库联合优化调度模型及其应用

为充分挖掘梯级水库间的水文补偿和库容补偿潜力,获取更高的综合利用效益,提出应用判别系数与水库蓄供水控制线相结合的方法,并结合免疫粒子群算法,以梯级电站发电量最大为目标,对水库蓄供水控制线进行优化。以乌江梯级水库为例,对其蓄供水方式进行了研究。联合调度结果表明,优化后的水库蓄供水控制线不仅可以合理控制水库蓄放水次序和蓄放水量,达到合理控制水库群运行方式的目的,而且在实际调度中具有良好的可操作性和抗风险性。

Comparative Study on the Kinetic Equations of Potassium Release from Soils

Elovicb, two-constant, parabolic diffusion, exponential, second-order, first-order and zero-order equations were used to describe the kinetic characteristics of potassium desorption from six paddy soils df Zhejiang Province in a constant electric field (44.4 V/ cm) of EUF. Results showed that the second-order and Elovich equations could describe the potassium desorption kinetics best, as evidenced by the highest correlation coefficients (r) and the lowest standard errors (SE). The first-order, two-constant and parabolic diffusion equations also described the K desorption kinetics well, as showed by the relatively high correlation coefficients and relatively low standard errors. The zero-order equation did not describe the K desorption satisfactorily with a relatively low correlation coefficient and relatively high standard error. However, the exponential equation could not be used to describe the K desorption kinetics, due to the lowest correlation coefficient and the highest standard error.

乌江梯级水库联合优化调度方案

为充分挖掘梯级水库间的水文补偿和库容补偿潜力,获取更高的综合利用效益,利用判别系数与水库蓄供水控制线相结合的方法,对乌江梯级水库的蓄供水方式进行了研究,并结合免疫粒子群算法,以梯级水电站发电量最大为目标对水库蓄供水控制线进行优化。联合调度结果表明,优化后的水库蓄供水控制线不但可以合理控制水库蓄放水次序和蓄放水量,达到合理控制水库群运行方式的目的,还在实际调度中具有良好的可操作性和抗风险性。