Power quality and modern energy for all.

Area of Science:

• Energy access and sustainable development
• Socio-technical systems analysis
• Electrical engineering and power systems

Background:

• The "Modern Energy for All" initiative aims to reduce poverty by expanding electricity access, particularly in sub-Saharan Africa.
• Capacity-constrained grids supplying resource-constrained populations can lead to variable electricity service quality.
• Understanding service quality is crucial for realizing the benefits of modern energy access.

Purpose of the Study:

• To investigate the spatial and temporal variations in electricity service quality in Unguja, Tanzania.
• To analyze the impact of poor voltage quality on households in a resource-constrained setting.
• To map voltage quality and its consequences for end-users.

Main Methods:

• Utilized a mixed-methods approach combining open-ended interviews, detailed electricity system monitoring, and household surveys.
• Conducted in-depth case study research in Unguja, Tanzania.
• Integrated physical system data with socio-economic user perspectives.

Main Results:

• Significant spatial and temporal variations in voltage quality were observed, even within localized areas.
• Electricity service quality issues ranged from light dimming to power outages and appliance damage.
• Poor voltage quality disproportionately affects vulnerable, resource-constrained populations.

Conclusions:

• Despite efforts to expand modern energy access, poor electricity quality in Unguja negates expected benefits for many residents.
• The study highlights the critical need to address voltage quality in financially and physically constrained power systems.
• Improving service quality is essential for ensuring vulnerable populations can fully benefit from electricity access.