Mini-Grids with RE and Storage

Transcription

1 Mini-Grids with RE and Storage MONTE TRIGO Municipality of Porto Novo Santo Antão Cabo Verde # SESAM-ER PROJECT # Simpósio - Praia, 09 de Maio de 2017

2 Monte Trigo: characteristics Isolation and remoteness (no road access or regularly scheduled maritime access); Smallness (274 inhabitants); Double degree of insularity/territorial discontinuity Territorial fragmentation (greater proximity between population of Monte Trigo and the urban center of São Vicente than with Porto Novo) Simpósio - Praia, 09 de Maio de

3 Monte Trigo: location Simpósio - Praia, 09 de Maio de

4 Monte Trigo micro-grid Photovoltaic Plant: 39.3 kwp Battery Autonomy: 2 days Energy Distribution Grid: 5 km (approx.) Public Lighting: 22 street lights Electricity Dispensers: 75 Backup: 20 kva Diesel Generator Simpósio - Praia, 09 de Maio de

5 Monte Trigo micro-grid Production Capacity Energy Demand Wh/day Wh/day Simpósio - Praia, 09 de Maio de

6 Monte Trigo micro-grid: Photovoltaic Generator Generator 1: Elementary School Patio 290 PV Modules (Total) # Modules: 210 (130 W) Inclination: 15º Direction: 20º W Simpósio - Praia, 09 de Maio de

7 Monte Trigo micro-grid: Photovoltaic Generator Generator 2: Power Plant Building # Modules: 80 (150 W) Inclination: 15º This generator was installed in the 2nd phase, with the goal of increasing production capacity and, consequently, the amount of energy available on the micro-grid. Simpósio - Praia, 09 de Maio de

8 Monte Trigo micro-grid: energy control and accumulation Regulation and Control Room The regulation units are responsible for extracting the most possible energy from the PV modules and maintaining an optimum charge level in the batteries. Inverters: 4x 8000 W Regulators: (2x 12 kw ) (4x4 kw) With MPPT (Maximum Power Point Tracking) Management Centers: 2 units Supervisor battery and demand management Data acquisition and recording Simpósio - Praia, 09 de Maio de

9 Monte Trigo micro-grid: energy control and accumulation Total batteries: 48 units (2x24) Battery Room Type: electrolyte (lead acid) Capacity: 3,850 Ah Autonomy: 2 days Simpósio - Praia, 09 de Maio de

10 Monte Trigo micro-grid: energy control and accumulation Potential: 20 kva Support/Backup: Diesel Generator This was the generator that supplied the village (prior to the project) for 5-7 hours per day. This backup generator is aimed at covering demand only occasionally, in case of emergencies (directly connecting to the grid for distribution and/or charging of batteries) Simpósio - Praia, 09 de Maio de

11 Monte Trigo micro-grid: distribution network and public lighting Energy distribution network Grid extension: ±5 km Line (Green/pink/red): new This part was added to the former grid Line (orange): existing Repaired and adapted to the specifications of the new grid Simpósio - Praia, 09 de Maio de

12 Monte Trigo micro-grid: distribution network and public lighting Total street lights: 23 Public Lighting 16 (LED) : 6x 34 W 10x 60W 7 (Sodium vapor): 70w Public lighting represents some 9.5% of total energy consumption. Simpósio - Praia, 09 de Maio de

13 Monte Trigo micro-grid: electricity consumers Electricity meters / dispensers Make a certain quantity of energy available per day based on the consumer s tariff category; Oscillations in charge are accentuated and predictable; Better rationing of available energy. Signals indicating energy surplus and limitations are received through a communication line; Shows amount of consumption at any time, in real time; Issues informational signals on the state of the system (excess or scarcity of energy). Simpósio - Praia, 09 de Maio de

14 Monte Trigo micro-grid: electricity consumers Types of Tariffs There are 4 tariff types or scales in this micro-grid, differentiated by the fixed quantities of potential (W) and energy (kwh) made available every day. Tariff Potential (kw) DEA* (Wh/dia) # contracts T T T T T TOTAL 75 So far, only the technical part of the scale has been applied. Consumers are not yet paying the adjusted value for the services provided. There is a need for a specific tariff for micro-grids in Cabo Verde. * DEA Daily Energy Allowance Simpósio - Praia,: 09 de Maio de

15 Monte Trigo micro-grid: electricity consumers Energy contracting model The energy contracting model is based on a pre-payment system. The consumer, using a machine-read card, activates his or her contract in accordance with the respective tariff category, paying a set amount. Following activation, the consumer will have an amount of electricity that corresponds to the contracted tariff category made available each day. If this quantity is not used up, the dispenser stores up to 5 times the Daily Energy Allowance. This model is aimed essentially at protecting the Plant from consumption spikes, preventing deep discharging of batteries. It is also a way of rationalizing electrical energy. As long as the energy availability at the power plant so allows, it is always possible to alter and increase tariff levels in cases in which the original tariff category becomes insufficient. Praia, 09 Maio

16 Monte Trigo micro-grid: electricity consumers Energy contracting model The meter / dispenser is designed to manage consumption, measure energy consumed and limit the maximum available potential; The card records information relating to the contracted tariff (amount of energy contracted per time unit), the energy available to be consumed and total energy consumed; With this information, it is possible to know if the consumer has enough energy available, has a surplus of energy or has less than necessary. Simposio - Praia, 09 Maio

17 Monte Trigo micro-grid: electricity consumers Home electrical installations, in accordance with norms, include ground protection in all homes. Lighting: light bulbs replaced by energyefficient bulbs. Electricity dispenser: available for each consumer Consumers receive indications regarding the state of the system. Green signal: indicates that there is an energy surplus Red signal: warns that consumption should be moderated. Simpósio - Praia, 09 de Maio de

18 Monte Trigo micro-grid: electricity consumers One year after the Monte Trigo PV Plant began operating, an ice production unit (Casa do Gelo) was installed to take advantage of the plant s surplus energy. With an installed capacity of 500 kg/day, the unit only produces, on average, for 7-9 hours a day, since consumers electricity needs must be satisfied first and foremost. Simpósio - Praia, 09 de Maio de

19 Monte Trigo micro-grid: results after 5 years of operations Energy produced (kwh) Energy consumed (kwh) (Mar) Simpósio - Praia, 09 de Maio de

20 Monte Trigo micro-grid: results after 5 years of operations Total Distribution Network (kwh) Public Lighting (kwh) Ice Production Unit (kwh) Energy consumded by plant (kwh) Simpósio - Praia, 09 de Maio de

21 Monte Trigo micro-grid: Main challenges faced Energy contracting model Non-application of an adjusted value to be paid by consumers for the round-the-clock electricity supply service provided. Need for a national tariff for micro-grids in the country; Systematic increase in demand for electricity, which will imply more investment to increase production capacity; Need to produce a greater quantity of ice in order to increase economic growth opportunities in the village. Also implies greater availability of energy; Simpósio - Praia, 09 Maio

22 Difference made by Monte Trigo photovoltaic plant Before round-the-clock energy access After round-the-clock energy access Limited access to food products for lack of the energy resources necessary to conserve them. Post-catch losses caused by isolation (lack of communication with S. Vicente market and lack of access to ice). Lower level of safety of fishing activities due to lack of lighting on beach. Low degree of attractiveness of village for trekking / rural tourism circuit. Extremely difficult everyday living conditions, especially for women, in household organization (food, education of children) More food security Better programming and predictability of fishing activities ( Reduction in losses, greater proximity to S. Vicente market, and ice factory) More access to telecommunications services Greater variety of educational and leisure activities More business opprtunities related to rural tourism and trekking Greater stability and lower stress levels for women in household organization Less vulnerable in emergency and calamity situations Simpósio - Praia, 09 Maio

23 Monte Trigo: an inspiring local example of the 2030 agenda Observable impacts: Improvement in living conditions and poverty reduction (SDGs 1 / 3 / 4) Increase in food security (SDG 2) Access to round-the-clock clean energy in a secure, continued and efficient manner, thus encouraging responsible consumption patterns (SDGs 7 / 12); Reduction in regional disparities (SDG 10); Increase in renewable energy penetration as a measure against the phenomenon of climate change (SDG 13); Consolidated public, private and community partnership in favor of development (SDG 17) Simpósio - Praia, 09 de Maio de

24 Primeiro Encontro Regional dos Pequenos Estados Insulares (SIDS) DOCK da África & Oceano Indico 27 de Julho SÃO VICENTE - CABO VERDE 24

25 Thank you! Janina CABRAL 25