Decentralization in the electricity system: At the household, community and city levels
Licentiate thesis, 2019
Three techno-economic optimization modeling methods are utilized to study technology investment and dispatch, self-consumption of electricity and heat at different levels of decentralization, and the interactions that occur between decentralized systems and the centralized electricity system. Prosumer households are modeled by combining a household electricity cost optimization model and a northern European electricity system dispatch model. The optimization model developed to study prosumer communities directly compares the PV-battery system investments and operations in individual prosumer households and in prosumer households within a community. The city energy system optimization model is designed to analyze interconnections between the urban electricity and heat (and in future work, also transport) sectors.
It is shown that prosumer households under the current Swedish tariff system experience a strong incentive to self-consume PV-generated electricity within their households and experience a weak incentive to operate their battery systems such as to reduce operational costs within the electricity system. Being part of a prosumer community can provide the highest monetary benefit to prosumer households for the purpose of reducing the connection capacity to the centralized system. Prosumer communities exhibit different patterns of electricity trade to the centralized system than individual prosumer households, due to local balancing of electricity within the community. On the city level, the installation of local generation and storage technologies for electricity and heat can reduce the stress on the connection to the centralized electricity system. Thus, local electricity generation can help to meet increases in electricity demand and demand peaks at the city level, stemming from city growth or electrification of energy use within the city. An interaction between the electricity and heating sectors in the city energy system can in the modeling results be seen in, for example, the utilization of power-to-heat technologies, which often use electricity during low-cost hours. Storage systems for electricity and heat are utilized within the city to shift electricity and heat between different periods.
Energy system modeling
Chalmers, Space, Earth and Environment, Energy Technology, Energy Technology 1
Prosumers in the Electricity System—Household vs. System Optimization of the Operation of Residential Photovoltaic Battery Systems
Frontiers in Energy Research,; (2019)
Organizing prosumers into electricity trading communities: Costs to attain electricity transfer limitations and self‐sufficiency goals
International Journal of Energy Research,; Vol. 43(2019)p. 7021-7039
Heinisch V, Göransson L, Odenberger M, Johnsson F. Interconnection of the electricity and heating sectors to support the energy transition in cities.
New networks of power: on the emergence, diffusion and impact of alternative electricity system architectures
Swedish Energy Agency, 2015-01-01 -- 2018-12-31.
Areas of Advance
Chalmers University of Technology
Opponent: Magnus Brolin, RISE Research Institutes of Sweden