串级控制系统在复合地源热泵系统中的应用

The Application of Cascade Control System at Compound Ground Source Heat Pump System

复合地源热泵系统具有时变、大时滞、非线性、多变量的特性,用常规单回路PID控制,很难达到较好的效果。因此采用串级控制方案,结合简便、实用的PID参数工程整定方法,使被控对象具有良好的动态调节品质。实践结果表明控制效果良好,抗干扰能力强,明显改善了时变、大时滞系统的控制质量。

The compound ground source heat pump system has a complex time-varying, large time-delay, nonlinear, multi-variable nature. With conventional single-loop PID control, it is difficult to achieve good results. Therefore, by using cascade control system, combined with simple and practical PID parameters tuning method to make the controlled system with excellent dynamic regulation quality. The practice results show that this cascade control system obtains ideal control effects, good anti-interference performance and significantly improves the control effect in the time-varying, large time-delay system.