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双机共尾水调压室是水电站引水发电系统中一种常见的布置形式,存在尾水调压室水位波动和水力干扰问题。结合双机共尾水调压室系统的实际算例,建立相应的数学模型,进行小波动和水力干扰情况下的稳定性和调节品质分析。计算分析表明,周期较长衰减较慢的尾水调压室水位波动会影响运行机组的调节品质,主要表现为调节时间较长。
Double common water surge chamber is a common layout of hydropower station diversion system, there is water surge of tail water surge chamber and hydraulic interference problems. Combining with the practical example of the system of twin-turbine and tail-water surge chamber, the corresponding mathematical model is established to analyze the stability and adjustment quality under the condition of small fluctuation and hydraulic disturbance. The calculation and analysis show that the fluctuation of water level of tailrace surge chamber, which has a relatively long period of decay, will affect the regulation quality of the operation units, mainly for the longer regulation time.