FLOW AMOUNT CALCULATING METHOD AT DAM OR DAM AREA

摘要

PURPOSE:To eliminate the abnormal value of the storage change amount and thus to increase the accuracy of the flow amount calculation by giving a comparison between the average value of the storage change amount calculated from the change of the water level at the upstream side and the value obtained by multiplying the allowance change range set by the hydralic conditions by the storage change a mount. CONSTITUTION:The water level change time t plus the average mount of change dv/dt of the storage amount V corresponding to the water level change are obtained for the dam through averaging circuit 6. Comparison reference value B is obtained by multiplying the average amount obtained above by allowance change range K+1 through multiplier 20, and the storage change amount calculated this time is compared 21 with value B. And in case value B is larger than the storage change amount, the average value including the storage change amount is obtained to be then added with the average value of discharge amount QO through adder 13 in order to obtain flow-in amount QI. In case storage change amount dv/dt calculated is larger than the reference value, dv/dt is shunted to memory 24, and the storage change amount to be obtained next is compared with the average value of the amount shunted in memory 24. In this way, the transient abnormal value of the storage change amount caused by the outer disturbance of the water level due to the waves can be eliminated, thus increasing the calculation accuracy of the flow amount.