抽水蓄能电站中球阀协同导叶关闭的水力瞬变过程控制方式  

Hydraulic transient controlling rules coupled with ball-valve and guide-vane in pumped storage power station

作　　者：李小芹[1] 常近时[1] 李长胜 陈鹏 唐学林[1] 

机构地区：[1]中国农业大学水利与土木工程学院,北京100083 [2]辽宁蒲石河抽水蓄能有限公司,辽宁丹东118000

出　　处：《水利学报》2014年第2期220-226,共7页Journal of Hydraulic Engineering

基　　金：中央高校基本科研业务费专项资金(2012QJ055);新世纪优秀人才支持计划(NETC-10-0784)

摘　　要：为了降低抽水蓄能机组水轮机工况甩负荷时蜗壳压力上升值和压力脉动值,应用了球阀协同导叶关闭的流量控制方式。于2012年在蒲石河大型抽水蓄能电站,进行了水轮机工况甩负荷过渡过程球阀参与导叶控制方式的现场试验。针对这一流量控制方式,利用内特性法预测了在甩负荷过渡过程中各动态参数的瞬变规律,预测的机组转速上升最大值与试验值的相对误差为2.11%,预测的蜗壳压力上升最大值与试验值的相对误差为0.74%,从而验证了内特性方法的合理性;同时证明,只要合理地选择导叶与球阀的控制规律,即可显著改善水泵水轮机装置水轮机工况甩负荷过渡过程的动态品质,降低抽水蓄能电站引水系统的水压上升值。In order to reduce the increase of volute water pressure and pressure pulsations in load rejection of pumped storage power stations, an effective technique for controlling flow rate was proposed based on the guide-vane adjustment combined with ball-valve under load rejection conditions of turbine. The test on site was carried out to investigate the control mode of the ball valve used in the transient of Pushihe pumped storage power station in 2012. For the control mode, internal characteristics method was employed to predict the transient rule of dynamical parameters in load rejections, the relative error of the max unit speed between the simulated results and the experimental data is 2.11%, and the relative error of the max rising of hydraulic pressure in the case between the calculated and the experimental is 0.74%, and thus, the rationality of the internal characteristics method was validated successfully. At the same time, all the comparisons and analyses proved that as long as the control rule of the ball valve together with guide-vane adjustment was selected reasonably, the rising of hydraulic pressure in the diversion system can be re-duced,and then the dynamic quality of turbine equipment for the load rejection can be improved notably.

关 键 词：水力瞬变 内特性 甩负荷 球阀 

分 类 号：TV741[水利工程—水利水电工程] TK733.1[交通运输工程—轮机工程]