一、问题的提出引水式电站在运行中遇到的一个普遍问题是枯水期发电量不够。为了改善这种情况,一般常常在挨近前池处修建日调节池。这在有恰当地形的地方是有效的,但有些电站由于地形条件的限制,不得不把调节池建在远离前池的地方,或者干脆在渠首利用河床建一小库调蓄。在这种情况下,由于从渠首到渠尾常有一段较长的距离,当机组负荷变化时,从渠首调节的 I. PROBLEM PROBLEMS A common problem encountered in the operation of diversion-type hydropower stations is that the electricity generation in the dry season is not enough. In order to ameliorate this situation, it is common to build day-adjusting ponds near the front pond. This is effective where the proper terrain is available. However, some power stations have had to be built away from the forebay because of topographical conditions or simply built a small reservoir at the head of the canal. In this case, since there is usually a long distance from the head of a canal to the tail of a canal, when the load of the unit is changed,