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石板水电站原设计安装 3台总功率 3× 33MW的水轮机组 ,但实际上安装了总功率为 3× 35 MW+1× 10 MW的 4台水轮机组 ,因此实际的装置流量增大 ,过渡过程暂态参数变坏。考虑这种情况 ,分别在功率为 35 MW和 10 MW的 2台水轮机上做了甩负荷过渡过程现场试验 ,获取了重要的暂态特性。为改善机组过渡过程动态品质 ,电厂应采用分段母线运行方式 ,以避免全电厂甩负荷 ,并且要对调速器进行改造 ,实现 2段关闭。通过计算机模拟得到调节参数优化结果 :对于小机 Ts1=3s,Ts2 =2 .8s,Tg=2 .3s;对于大机 Ts1=4 s,Ts2 =3.5 s,Tg=3.1s
The original design and installation of 3 units of 3 × 33MW turbine units in Shiban Hydropower Station actually installed 4 hydraulic turbines with a total power of 3 × 35MW and 1 × 10MW. Therefore, the actual plant flow rate increased and the transient process temporarily The state parameter gets worse. Considering this situation, field tests of load-dump transition process were carried out on two turbines with power of 35 MW and 10 MW respectively, and important transient characteristics were obtained. In order to improve the dynamic quality of the unit during the transition, the power plant should adopt the mode of segmented bus to avoid the load rejection of the whole power plant and transform the governor to achieve 2-stage shutdown. The optimization results of the tuning parameters were obtained by computer simulation: Ts1 = 3s, Ts2 = 2.8s, Tg = 2.3s for small devices, Ts = 3.5s, Ts = 3.1s