闭式水循环系统的稳定性分析

针对闭式水循环系统，采用关闭某个支路，进行网络求解，计算其他支路的流量偏离系数的方法，分析了稳定性随各种影响因素的变化规律。结果表明：减小干线阻抗，增大支路阻抗，可以提高系统的稳定性。改变动力的集中调节对系统的稳定性没有影响，改变阻力的集中调节将使系统的稳定性变差。泵的特性曲线对系统的稳定性有影响，平坦型对应的稳定性优于陡降型对应的稳定性。异程系统，离热源最远支路的稳定性最差。同程系统，网路中部的支路稳定性最差；同程系统的稳定性总体上不如异程系统。

Stability Analysis of Closed-loop Water System

Aiming at closed-loop water system,by the method that shutting certain subcircuit,and solving the piping network,computing flow deviation of other subcircuits',then analyzing the changing rules of the stability vary with various factors.Following conclusions are obtained: When decreasing resistances of main pipes,increasing resistances of subcircuits,system stability can be improved.Centralized regulation by changing power has no influence to system stability;centralized regulation by changing resistances will worsen system stability.Pump characteristics curve influences system stability,stability of the flat characteristic is superior to the steep one.Stability of DRS,the subcircuit that is furthest to the heat source is the worst.Stability of RRS,subcircuit in the middle of the pipe-network has the worst stability.Overall,stability of RRS' is inferior to DRS'.