| 摘要 |
PROBLEM TO BE SOLVED: To provide a pump driving method in a pump site and a pump driving device, capable of suppressing surging even when a gate is used instead of a discharge valve and an axial-flow pump is used as a pump. SOLUTION: In this pump driving method in the pump plant, a lower end opening of a pump installation hole is communicated with a water channel communicated with a pump suction water tank, and the pump is installed on the pump installation hole. The pump is normally started until the rotational speed of the pump reaches a predetermined rotational speed D preventing a water level of the pump suction water tank from becoming below an emergency pump stop setting water level. Then, the rotational speed is increased to rated speed E at a speed increasing rate which prevents a problem of surging, as indicated in A; is increased at an optimum speed increasing rate per rotational speed preset to prevent the problem of surging in accordance with water channel properties, as indicated in B; or is increased by predetermined amount, kept until a transient phenomenon is stopped and increased again by predetermined amount after the transient phenomenon is stopped, as indicated in C that these steps are repeated. COPYRIGHT: (C)2006,JPO&NCIPI
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