A master thesis from Aalborg University
Cost-Efficient Operation of Heat Pump Pools: Optimisation and operation from the perspective of a German aggregator
[Cost-Efficient Operation of Heat Pump Pools]
Author(s)
Term
4. term
Education
Publication year
2017
Submitted on
2017-05-31
Pages
102 pages
Abstract
The mitigation of Climate Change and the associated decrease in the greenhouse gas emissions originating from the building sector requires an increase of the installation rates of heat pumps in Germany. One way to give the necessary incentives to achieve this would be to reduce the heat pumps’ electricity consumption costs. With the aid of simulations, this master’s thesis analyses the potential to conduct a more cost-efficient operation of a heat pump pool. The scenario investigated comprises a centrally acting aggregator, which is responsible for the operation of 284 heat pumps operating in Germany. In order to reduce the electricity consumption costs, the aggregator conducts a Linear Programming-optimisation each day and purchases the obtained optimised electricity consumption trajectory on the EPEX day-ahead spot market. The optimisation problem is based on a storage model and is constrained by the available flexibility of the heat pump pool. The achieved optimised operation of the pool shows a characteristic load shifting pattern which is similar to the ones presented in related research. Through the optimisation, the pool’s electricity consumption is partly shifted to times having a lower electricity price while accounting for the load shifting efficiency. In order to match the actual pool operation with the one purchased, the aggregator uses a pool controller which influences the individual heat pump operation by sending SG-Ready trigger signals. By using the different trigger signals, the pool controller is able to operate the pool according to the optimised trajectory. The achieved accuracy of trajectory shows an error in the relative annual energy consumption of around 1 %.
Keywords
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