-某水電站的水能指標(biāo)分析計算案例1.1確定調(diào)節(jié)流量年調(diào)節(jié)水電站可根據(jù)三個設(shè)計代表年進行完全年調(diào)節(jié)的情況，以確定完全年調(diào)節(jié)所需的調(diào)節(jié)流量。當(dāng)不計入水量損失時 Q調(diào)= Q調(diào)'式中Q調(diào)和Q調(diào)'W設(shè)供和W天蓄分別是供水期和蓄水期的來水總量，mT供和T三個設(shè)計代表年的年徑流過程見表2-3，分別根據(jù)式（2-3）和式（2-4）求出蓄水期和供水期以及相應(yīng)的調(diào)節(jié)流量，計算結(jié)果見下表。表2-4設(shè)計枯、平、豐水年各時段調(diào)節(jié)流量匯總表設(shè)計枯水年設(shè)計平水年設(shè)計豐水年供水期8月～次年2月10月～次年2月10月～次年2月Q調(diào)（m38.82613.2614.48蓄水期4月～7月3～7月7～8月Q調(diào)'（m13.85522.9482.96不供不蓄期3月8～9月3～6、9月1.2計算保證出力和多年平均年發(fā)電量保證出力N保的計算采用設(shè)計枯水年法，取該供水期的平均出力作為年調(diào)節(jié)水電站的保證出力。月平均出力 N=AQ（Z式中A=9.81η，取A=8.0，則η=0.815。多年平均年發(fā)電量E年采用三個代表年法進行估算 E年三個設(shè)計代表年的出力及發(fā)電量計算分別見表2-5～2-7。表2-5設(shè)計枯水年電站出力及發(fā)電量計算時段/月三四五六七八九十十一十二一二Q天m3/s21.717.413.747.987.212118.69.43.72.73.311Q調(diào)21.717.413.747.982.9682.9618.614.4814.4814.4814.4814.48ΔQ00004.2438.040-5.08-10.78-11.78-11.18-3.48ΔW億m300000.11210-0.134-0.284-0.31-0.294-0.092V初1.0351.0351.0351.0351.0351.1461.1461.1472.0131.731.421.126V末1.0351.0351.0351.0351.1461.1461.1462.0131.731.421.1261.035Z初m209.6209.6209.6209.6209.6209.6210210210209.8209.7209.6Z末209.6209.6209.6209.6209.6210210210209.8209.7209.6209.6Z上209.6209.6209.6209.6209.6209.8210210209.9209.8209.7209.6Z下133.7133.6133.5134.1134.4134.4133.7133.5133.5133.5133.5133.5H75.8675.9776.0875.5275.2475.4576.3476.4476.3676.2576.1476.07N萬kW1.3171.0570.8342.8944.9945.0081.1360.8850.8850.8830.8820.881E水萬kW·h961.4771.9608.7211236453655829.3646.4645.8644.8643.9643.3表2-6設(shè)計平水年電站出力及發(fā)電量計算時段/月三四五六七八九十十一十二一二Q天m3/s25.230.132.639.729.411.131.26.12.81.12.910.1Q調(diào)22.9422.9422.9422.9422.9411.131.213.2613.2613.2613.2613.26ΔQ1.267.169.6616.766.4600-7.16-10.5-11.2-10.4-3.16ΔW億m30.0590.1880.2540.4410.1700-0.19-0.28-0.29-0.27-0.08V初1.0351.0941.2821.5361.9771.1471.1471.1471.9591.6841.391.118V末1.0941.2821.5361.9771.1471.1471.1471.9591.6841.391.1181.035Z初m190191.3195.5200.9207.6210210210207.3203.2198191.9Z末191.3195.5200.9207.6210210210207.3203.2198191.9190Z上190.7193.4198.2204.2208.8210210208.7205.3200.6194.9190.9Z下133.7133.7133.7133.7133.7133.5133.9133.5133.5133.5133.5133.5H56.9259.6964.4770.575.0676.5476.1475.1771.867.161.457.42N萬kW1.0451.0951.1831.2941.3780.7411.9610.7970.7620.7120.6510.609E水萬kW·h762.5799.7863.7944.51006540.81432581.1556519.6475.5444.7表2-7設(shè)計豐水年電站出力及發(fā)電量計算時段/月三四五六七八九十十一十二一二Q天m3/s21.717.413.747.987.212118.69.43.72.73.311Q調(diào)21.717.413.747.982.9682.9618.614.4814.4814.4814.4814.48ΔQ00004.2438.040-5.08-10.8-11.8-11.2-3.48ΔW億m300000.11210-0.13-0.28-0.31-0.29-0.09V初1.0351.0351.0351.0351.0351.1461.1461.1472.0131.731.421.126V末1.0351.0351.0351.0351.1461.1461.1462.0131.731.421.1261.035Z初m209.6209.6209.6209.6209.6209.6210210210209.8209.7209.6Z末209.6209.6209.6209.6209.6210210210209.8209.7209.6209.6Z上209.6209.6209.6209.6209.6209.8210210209.9209.8209.7209.6Z下133.7133.6133.5134.1134.4134.4133.7133.5133.5133.5133.5133.5H75.8675.9776.0875.5275.2475.4576.3476.4476.3676.2576.1476.07N萬kW1.3171.0570.8342.8944.9945.0081.1360.8850.8850.8830.8820.881E水萬kW·h961.4771.9608.7211236453655829.3646.4645.8644.8643.9643.3由表2-5數(shù)據(jù)可得，N保供=0.47萬kW，E保供=2387.44萬kW·h。由表2-5～2-7數(shù)據(jù)可得1.3復(fù)核水庫調(diào)節(jié)性能以對設(shè)計枯水年按等流量進行完