基于敏感度分析零压差点对分布式变频泵系统稳定性的影响
Sensitivity analysis on influence of zero-pressure-difference point on stability of distributed variable-frequency pump system
摘要：
通过计算各支路流量相对于各支路水泵转速变化的敏感度，进而计算各支路的稳定性指标Ks。比较了变零压差点运行与定零压差点运行的稳定性，分析了定零压差点运行时零压差点位置对稳定性的影响。结果表明，定零压差点运行的稳定性优于变零压差点运行，零压差点控制位置选在网路的中部对提高系统整体的稳定性最有利。
Abstract：
Ks can be used to reflect the stability of each branch. It can be determined by calculating the sensitivity of branch flow rate to the speed of branch pump. Compares the stability of the regulation mode with fixed zero-pressure-difference point and that with variable zero-pressure-difference point. Analyses the influence of the position of the zero-pressure-difference point on the stability in the regulation mode with fixed zero-pressure-difference point. The results show that the stability of the regulation mode with fixed zero-pressure-difference point is better than that with variable zero-pressure-difference point, and it is the most advantageous for the whole stability of system to have the zero-pressure-difference point stay in the middle of network.
Keywords:distributedvariable-frequencypumpsystem,sensitivity,zero-pressure-differencepoint,stability,watersystem