A high-resolution stochastic model of domestic activity patterns and electricity demand

• Published in: Applied energy Vol. 87; no. 6; pp. 1880 - 1892
• Main Authors: Widén, Joakim, Wäckelgård, Ewa
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-06-2010; Elsevier
• Series: Applied Energy
• Subjects: Applied sciences; Bottom-up; Domestic electricity demand; Domestic electricity demand Stochastic Markov chain Bottom-up Load model; Economic data; Electric energy; Energy; Energy economics; Exact sciences and technology; General, economic and professional studies; Load model; Markov chain; Methodology. Modelling; Stochastic; TECHNOLOGY; TEKNIKVETENSKAP; Markov chain; Stochastic; Load model; Bottom-up; Domestic electricity demand; Demand; Stochastic model; Electricity; Electric power consumption; Bottom up method; Modeling; Residential sector
• ISSN: 0306-2619; 1872-9118; 1872-9118
• DOI: 10.1016/j.apenergy.2009.11.006

Realistic time-resolved data on occupant behaviour, presence and energy use are important inputs to various types of simulations, including performance of small-scale energy systems and buildings’ indoor climate, use of lighting and energy demand. This paper presents a modelling framework for stochastic generation of high-resolution series of such data. The model generates both synthetic activity sequences of individual household members, including occupancy states, and domestic electricity demand based on these patterns. The activity-generating model, based on non-homogeneous Markov chains that are tuned to an extensive empirical time-use data set, creates a realistic spread of activities over time, down to a 1-min resolution. A detailed validation against measurements shows that modelled power demand data for individual households as well as aggregate demand for an arbitrary number of households are highly realistic in terms of end-use composition, annual and diurnal variations, diversity between households, short time-scale fluctuations and load coincidence. An important aim with the model development has been to maintain a sound balance between complexity and output quality. Although the model yields a high-quality output, the proposed model structure is uncomplicated in comparison to other available domestic load models.