Abstract

This paper presents a systematic comparison between three alternatives to design the supervisory control layer of a district heating network composed of a waste heat boiler, an electric boiler, a dump, a hot water storage tank, and a set of consumers. The three alternatives are split range control, controllers with different setpoints, and model predictive control. We evaluate the closed-loop performance in the face of time-varying supply and demand, and constant electricity prices. All alternatives were found to give similar performance. Controllers with different setpoints is the easiest to implement, while model predictive control is the most difficult.

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