S. Grosswindhager, M. Kozek, A. Voigt, L. Haffner:
"Fuzzy Predictive Control of District Heating Network";
International Journal of Modelling, Identification and Control (eingeladen), 19 (2013), 2; S. 161 - 170.

Kurzfassung englisch:
This paper presents a concept for controlling the supply temperature in
district heating networks (DHN) using model predictive control. Due to the inherent
non-linearity in the response characteristics caused by varying flow rates the use
of Fuzzy Dynamic Matrix Control (DMC) is proposed. The fuzzy partitions of the
local Finite Impulse Response (FIR) models are constructed by an axis-orthogonal,
incremental partitioning scheme. Furthermore, a novel approach for determining future
fuzzy trajectory based on heat load forecasts is implemented. It is demonstrated that the
Fuzzy DMC performs well for the case study considered. In addition, different set point
strategies are applied and the results are evaluated with respect to operational costs. In
this context it is shown that the trade-off between pumping and heat loss cost plays an
important role in minimizing overall costs.

non-linear predictive control; district heating systems; fuzzy identification; conditional parametric models; dynamic matrix control (DMC)

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