超临界机组变频循环水泵节能自动控制技术

Energy saving automatic control technology of frequency conversion circulating water pump in supercritical unit

针对变频循环水泵稳定性较差、能耗较高的问题,设计了超临界机组变频循环水泵节能自动控制技术。将空气阻力下的重力势能进行了转换,计算水泵循环流量,将循环频率分解成多个单耗计算模块,计算能量损耗,将能量损耗优化作为目标函数,设计自适应反馈的电动泵控制方案;随机选择2个控制平衡点数据,完成超临界机组变频循环水泵节能自动控制。实验结果表明,该技术有效降低了水泵流量与水泵运行资金,能够稳定水泵转速及电流,取得了较好的实用效果。

Aiming at the problems of poor stability and high energy consumption of variable frequency circulating water pump,an energy-saving automatic control technology for variable frequency circulating water pump of supercritical unit is designed.The gravity potential energy conversion under air resistance is carried out,the circulating flow of the water pump is calculated,the circulating frequency is decomposed into multiple unit consumption calculation modules,the energy loss is calculated,the energy loss optimization is taken as the objective function,the self-adaptive feedback control scheme of the electric pump is designed,and the data of two control equilibrium points are randomly selected to complete the energy-saving automatic control of the frequency conversion circulating water pump of the supercritical unit.The experimental results show that the technology can effectively reduce the pump flow and pump operating capital,stabilize the pump speed and current,and achieve good practical application results.