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Cost-Benefit Comparison of a Time-of-Use Tariff and Real-Time Pricing of Electricity Associated with Automated HVAC Load Management Strategies in
Banks Across Mainland Portugal


L. Pires Klein, J. Landeck, L. Matos, I. Torres, A. Bernardes




The gradual liberalization of the Portuguese energy market opens up new pathways in which further
progress on demand response programs can be achieved. In light of this, the main objective of this paper is to evaluate the cost-benefit of introducing a Real-Time-Pricing (RTP) rate over the prevailing Time-Of-Use (TOU) tariff structure in 26 Normal Low Voltage (NLV) bank branches dispersed across Mainland Portugal. Additionally, the further impact of the association of RTP with Automated RTP-Responsive HVAC Load Management Strategies (ALMS) on cost savings is also
examined. This study grouped the bank branches in 8 bioclimatic zones, to assess the influence exerted by geographic location on these results. Analyses were conducted using real granular electricity usage data from 2015, which were collected using an integrated power optimization software platform entitled Kiplo Smart Engine. Simulations reveal that the introduction of RTP reflects an annual electricity cost reduction of approximately 34% against the TOU tariff. Furthermore, the association of RTP with the proposed ALMS raised the annual electricity cost savings to up to 47%. In conclusion, it is expected that the unique nature of exploration of this study will foment discussions around the regulation of RTP programs to NLV consumers in Mainland Portugal.

Published in: Renewable Energy & Power Quality Journal (RE&PQJ, Nº. 15)
Pages: 728-733 Date of Publication: 2017/04/25
ISSN: 2172-038X Date of Current Version:

REF: 450-17

Issue Date: April 2017
DOI:10.24084/repqj15.450 Publisher: EA4EPQ

Authors and affiliations

L. Pires Klein 1,2 , J. Landeck 2 , L. Matos 2 , I. Torres 2 , A. Bernardes 2
1. Sustainable Energy Systems Doctoral Program MIT Portugal Initiative. University of Coimbra, Coimbra (Portugal)
2. Virtual Power Solutions Iberia. Pedro Nunes Institute (IPN), Coimbra (Portugal)

Key word

Real Time Pricing, Automated Load Management, Demand Response, Energy Cost Optimization, Energy Regulation


[1] Saraiva, J. T., Fidalgo, J. N., Pinto, R. B., Soares, R., Afonso, J. S. and Pires, G. (2016). Implementation of dynamic tariffs in the Portuguese electricity system - preliminary results of a Cost-Benefit Analysis. 2016 13th International Conference on the European Energy Market (EEM), Porto, 2016, pp. 1-5. doi: 10.1109/EEM.2016.7521329.
[2] Spees, K. and Lave, L. B. (2008). Impacts of responsive load in PJM: load shifting and real time pricing. Energy
Journal, 29, 2, 101-121. doi: 10.5547/ISSN0195-6574-EJ-Vol29-No2-6.
[3] P. Faria, Z. Vale. (2011). Demand response in electrical energy supply: an optimal Real Time Pricing approach. Energy, Elsevier, 2011, 36, 8, pp. 5374. doi: 10.1016/j.energy.2011.06.049.
[4] Despacho (extrato) no 15793-F/2013. Decreto-Lei no 118/2013 de 20 de Agosto. Diário da República: II série, No
234 (3 de Dezembro de 2013).