DC- Versus AC Minigrids for Sub-Saharan Africa

Research output: Contribution to conferencePoster

Abstract

Sub-Saharan Africa continues to suffer energy poverty due to low grid expansion rates necessitated by low economic activities in those regions, sparse population distribution coupled with low household load demands, and insufficient power generation. On the other hand, small solar power microgeneration systems have emerged as potential alternatives to grid electrifications, enabling households to make modest investments into their power systems, and to modify their systems according to their changing economic and power demand circumstances. For rural social-economic development, electricity-beyond-lighting is needed. Without the grid, the only alternative is minigrids based on locally available renewable energy resources. In this work, we compare the merits and demerits of DC and AC coupled systems as pertains to costs, efficiencies, and overall performances. Research shows that power conversion stages are the biggest points of power losses in minigrids and therefore avoiding many conversion stages lead to improved overall system efficiencies. Research also shows that the best performances are realized when DC-inherent appliances are supplied with power from DC-coupled networks, supplied by distributed DC power generators such as PV. Simulation results show that when given choices, consumers choose to connect to DC networks with decentralized storage to due to lowest operating costs, ease of expansion, and overall better performances when compared to other networks.

Conference

Conference36th European Photovoltaic Solar Energy Conference
Abbreviated titleEUPVSEC
CountryFrance
CityMarseille
Period9/09/1913/09/19
Internet address

Fingerprint

Economics
Population distribution
Renewable energy resources
Operating costs
Solar energy
Power generation
Electricity
Lighting
Costs

Keywords

  • Minigrids
  • DC-coupled
  • AC-coupled
  • Conversion losses

Cite this

Opiyo, N. (2019). DC- Versus AC Minigrids for Sub-Saharan Africa. Poster session presented at 36th European Photovoltaic Solar Energy Conference, Marseille, France.
Opiyo, Nicholas. / DC- Versus AC Minigrids for Sub-Saharan Africa. Poster session presented at 36th European Photovoltaic Solar Energy Conference, Marseille, France.1 p.
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abstract = "Sub-Saharan Africa continues to suffer energy poverty due to low grid expansion rates necessitated by low economic activities in those regions, sparse population distribution coupled with low household load demands, and insufficient power generation. On the other hand, small solar power microgeneration systems have emerged as potential alternatives to grid electrifications, enabling households to make modest investments into their power systems, and to modify their systems according to their changing economic and power demand circumstances. For rural social-economic development, electricity-beyond-lighting is needed. Without the grid, the only alternative is minigrids based on locally available renewable energy resources. In this work, we compare the merits and demerits of DC and AC coupled systems as pertains to costs, efficiencies, and overall performances. Research shows that power conversion stages are the biggest points of power losses in minigrids and therefore avoiding many conversion stages lead to improved overall system efficiencies. Research also shows that the best performances are realized when DC-inherent appliances are supplied with power from DC-coupled networks, supplied by distributed DC power generators such as PV. Simulation results show that when given choices, consumers choose to connect to DC networks with decentralized storage to due to lowest operating costs, ease of expansion, and overall better performances when compared to other networks.",
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Opiyo, N 2019, 'DC- Versus AC Minigrids for Sub-Saharan Africa' 36th European Photovoltaic Solar Energy Conference, Marseille, France, 9/09/19 - 13/09/19, .

DC- Versus AC Minigrids for Sub-Saharan Africa. / Opiyo, Nicholas.

2019. Poster session presented at 36th European Photovoltaic Solar Energy Conference, Marseille, France.

Research output: Contribution to conferencePoster

TY - CONF

T1 - DC- Versus AC Minigrids for Sub-Saharan Africa

AU - Opiyo, Nicholas

PY - 2019/9/11

Y1 - 2019/9/11

N2 - Sub-Saharan Africa continues to suffer energy poverty due to low grid expansion rates necessitated by low economic activities in those regions, sparse population distribution coupled with low household load demands, and insufficient power generation. On the other hand, small solar power microgeneration systems have emerged as potential alternatives to grid electrifications, enabling households to make modest investments into their power systems, and to modify their systems according to their changing economic and power demand circumstances. For rural social-economic development, electricity-beyond-lighting is needed. Without the grid, the only alternative is minigrids based on locally available renewable energy resources. In this work, we compare the merits and demerits of DC and AC coupled systems as pertains to costs, efficiencies, and overall performances. Research shows that power conversion stages are the biggest points of power losses in minigrids and therefore avoiding many conversion stages lead to improved overall system efficiencies. Research also shows that the best performances are realized when DC-inherent appliances are supplied with power from DC-coupled networks, supplied by distributed DC power generators such as PV. Simulation results show that when given choices, consumers choose to connect to DC networks with decentralized storage to due to lowest operating costs, ease of expansion, and overall better performances when compared to other networks.

AB - Sub-Saharan Africa continues to suffer energy poverty due to low grid expansion rates necessitated by low economic activities in those regions, sparse population distribution coupled with low household load demands, and insufficient power generation. On the other hand, small solar power microgeneration systems have emerged as potential alternatives to grid electrifications, enabling households to make modest investments into their power systems, and to modify their systems according to their changing economic and power demand circumstances. For rural social-economic development, electricity-beyond-lighting is needed. Without the grid, the only alternative is minigrids based on locally available renewable energy resources. In this work, we compare the merits and demerits of DC and AC coupled systems as pertains to costs, efficiencies, and overall performances. Research shows that power conversion stages are the biggest points of power losses in minigrids and therefore avoiding many conversion stages lead to improved overall system efficiencies. Research also shows that the best performances are realized when DC-inherent appliances are supplied with power from DC-coupled networks, supplied by distributed DC power generators such as PV. Simulation results show that when given choices, consumers choose to connect to DC networks with decentralized storage to due to lowest operating costs, ease of expansion, and overall better performances when compared to other networks.

KW - Minigrids

KW - DC-coupled

KW - AC-coupled

KW - Conversion losses

M3 - Poster

ER -

Opiyo N. DC- Versus AC Minigrids for Sub-Saharan Africa. 2019. Poster session presented at 36th European Photovoltaic Solar Energy Conference, Marseille, France.