To be or not to be: On system dynamics and the viability of mini-grids in rural electrification
Doctoral thesis, 2018

One to two billion people are expected to receive electricity access in developing countries in the coming decades. Many of these people will live in rural areas in developing countries where the existing grid will not be able to reach. These people will therefore rely on off-grid technologies to gain electricity access. One off-grid technology that is expected to grow significant is mini-grids. In addition, the number of mini-grids in developing countries are expected to growth significantly. Furthermore, renewable energy sources are increasingly used in mini-grids, putting larger emphasises on dimensioning and management of the technical system. However, previous experiences with mini-grids in rural electrification have been mixed, and many systems have failed or been abandoned prematurely. The many interactions between technical, operational and social elements make it difficult to attribute the failures to specific causes.

The main purpose of this thesis is to investigate why mini-grids in rural electrification fail. The investigation focuses on reliability of electricity and how it is impacted by and impacts operation of mini-grids, the technical system and the community. The investigation is made through the implementation of system dynamics and load assessment.

Rural electrification consists of many actors with different goals, it concerns the behaviour of people and is affected by technology. As, such, formulating relevant problems in rural electrification is difficult. As shown in Paper II, qualitative system dynamics can aid the process of tackling this complexity and therefore also in formulating problems. Results from Paper IV show that initial dimensioning of mini-grids is important for long-term viability. However, the dimensioning is dependent on estimations of electricity usage or electricity usage in similar areas, which are often done through collection of data through interviews. As shown in Paper III, interview-based load profiles might not be an accurate estimation of measured load profiles. Thus, estimates from interview-based load profiles might provide misleading estimations resulting in non-optimal sizing. Results from Paper I show that long-term reliability in mini-grids is affected by operational practices and community behaviour. Even though poor reliability is associated with the failure of specific components in the technical system, they are subject to operational practices and are thus influenced by the overall functioning of a mini-grid. As such, long-term reliability in mini- grids needs to be considered from a system perspective.

system dynamics

rural electrification

reliability

mini-grids

complexity

load assessment

EB
Opponent: Birgit Kopainsky, University of Bergen, Norway

Author

Elias Hartvigsson

Chalmers, Electrical Engineering, Electric Power Engineering

Hartvigsson E., Ehnberg J., Ahlgren E., Molander S., Using system dynamics to describe deteriorating electricity reliability in mini-grids

Hartvigsson E., Ahlgren E., Molander S., Tackling complexity and problem formulation in rural electrification through conceptual modeling and system dynamics

Rural electrification and capacity expansion with an integrated modeling approach

Renewable Energy,; Vol. 115(2018)p. 509-520

Journal article

One to two billion people are expected to receive access to electricity in developing countries in the coming decades. Many of these people live in rural areas and will rely on mini-grids for their electricity supply. Previous experiences with mini-grids have been mixed and many fail or are abandoned prematurely. This thesis investigates why mini-grids fail, specifically focusing on their reliability and its impact on their operation and the communities. Using systems thinking, reliability is linked with socio-technical system structures and is affected by operational practices. It is found, that during certain circumstances, deteriorating reliability could lead to mini-grid failure.

Driving Forces

Sustainable development

Subject Categories

Social Sciences Interdisciplinary

Information Systemes, Social aspects

Other Electrical Engineering, Electronic Engineering, Information Engineering

Areas of Advance

Energy

ISBN

978-91-7597-733-1

Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie: 4414

Publisher

Chalmers University of Technology

EB

Opponent: Birgit Kopainsky, University of Bergen, Norway

More information

Latest update

4/16/2018