性能曲线可直观地反映往复泵运行工况及其特性，传统的绘制方法工作量大，且效率低。
The performance curves directly reflect the running status of reciprocating pump and its features; the traditional drawing method has the characteristics, a great deal of work and low efficiency.
现有的300 MW机组凝汽器特性曲线没有考虑到水环真空泵汽蚀特性对凝汽器运行特性的影响，不能准确反映凝汽器的运行状态。
In the existing 300mw steam turbine condenser performance curve, the cavitation in water ring vacuum pump is not taken account, so the curve can't exactly reflect the operation state of condenser.
利用特性曲线对变速泵与定速泵并联运行工况进行了讨论，指出其正确切换步骤。
Running conditions of parallel-connected variable and constant speed pump are discussed using pump performance curve, and the correct switch steps are pointed out.
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