Characteristic Analysis and Multi-model Control Research on Ring-shaped Heat Network with Triple Heat Sources

The dynamic hydraulic regime of ring-shaped heating network is quite complicated and unintelligible, accompanying strong coupling nonlinearity, large-inertia among multivariable, and these problems bring much difficulty to tracking user loads. To this end, this paper conducts characteristics analysis of ring-shaped network concluding step responses and nonlinearity analysis with the difference of manipulated variables. Then suggests a multi-model predictive controller for the ring-shaped heating network and finally carries out two simulations using different manipulated variables, which shows the approach can track load quickly and the different controlling performance.