双机共尾水调压室系统的调节品质分析

Performance of tailrace surge chamber shared by two units

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。

The tailrace surge chamber shared by two units, common in hydropower stations with diversion systems, has problems of water level fluctuation and hydraulic disturbance. Based on calculation example, mathematic models are developed to analyze the stability and regulation performance of the unit under the conditions of smull water level fluctuation and hydraulic disturbance. Results show that the water level fluctuation with a long cycle and slow attenuation causes long regulation time of the unit.