Santo Domingo – Federico Martinez, an expert and consultant in the electricity sector, said that limiting the penetration of intermittent energy (solar and wind) is necessary until the cost of storing solar energy falls. Contact online >>
Santo Domingo – Federico Martinez, an expert and consultant in the electricity sector, said that limiting the penetration of intermittent energy (solar and wind) is necessary until the cost of storing solar energy falls.
Martínez explained that the proposed regulation for distributed generation proposes a limit of 15% of the maximum demand as an aggregate of distributed generation (DG). Thus, the final purpose should be to move to 100% renewables while maintaining the stability of the electricity grid.
The specialist explained that for this, energy must be stored, and smart grids must be capable of managing the intermittency and variability of wind and photovoltaic sources. He pointed out that the country is far from that.
The electricity expert said that on December 19, the U.S. Energy Information Administration (EIA) published an article titled “As solar capacity rises, the ‘duck silhouette’ is getting deeper.”
Martinez pointed out that all this energy is produced cleanly and that fuel saving is a significant economic and environmental benefit; however, not everything is rosy.
“Electrical energy must be consumed as it is produced. There is no cost-effective way to store it. Batteries are still expensive, store a limited amount of energy, and have a limited number of charge and discharge cycles. Electricity grid operators are required to manage the energy that is dispatched depending on its cost and origin. This presents problems for which there are still no efficient solutions. For example, the stress of the system,” he said.
Giving the example of the Punta Catalina Thermoelectric Power Plant plant, he explained that “it takes two days to turn it off and at least one day to turn it on.
That implies that it must be on 24/7, designated as base generation. At noon, they can lower the load, but their efficiency drops. Like a car, at 20 km/h, it consumes more fuel per km driven than at 80 km/h.
Another problem is that even if your production is reduced at noon, it takes hours to increase production, and from 4:00 PM, when the sun goes down, the demand increase rises exponentially in two or three hours.”
He emphasized that engines and turbines can come online quickly; however, they suffer from the same fuel efficiency limitation at different load levels, which translates into a higher cost per kilowatt produced.
Siemens and the marine arm of ST Engineering in Singapore have jointly received an order for a SCC-800 2x1C SeaFloat barge-mounted power plant from Seaboard Corporation subsidiary Transcontinental Capital Corporation (Bermuda) Ltd., an Independent Power Producer (IPP) with operation in Dominican Republic. The project Estrella del Mar III in the Dominican Republic will provide the customer with a highly efficient power generation facility.
"Our trendsetting SeaFloat technology combines state-of-the-art combined cycle power plant technology with the mobility and flexibility required by the current and future energy market," said Karim Amin, CEO Global Sales Siemens Power and Gas. "Our vision is a future with access to affordable but clean electricity and clean water for everyone. A tough challenge to achieve, but a necessity in light of climate change and the need to provide electrical energy for the world's growing population," Amin added.
"This collaboration between ST Engineering and Siemens leverages each other's strength and capabilities to design, build and deliver a technologically advanced floating power barge. We're excited that in the end, the SCC-800 2x1 floating power plant will bring clean and green electrical energy solution to benefit more people in the Dominican Republic," said Ng Sing Chan, President, Marine, ST Engineering.
Variations of the SeaFloat power plants can be used as base load, or emergency backup for existing power plants during peak loads or outages and to provide a fast power supply in the event of a humanitarian disaster. SeaFloat power plants can even be supplemented with a desalination plant to provide clean potable water and help prevent diseases. A wide range of gas turbine frames and combined cycle configurations are available so that an appropriate solution that meets specific requirements can be developed together with customers.
Typical applications include the power supply for remote areas like islands, the development of industrial areas on shorelines or major rivers (for example, chemical and desalination plants) as well as brownfield applications.
With one of the fastest growing economies in the Latin American and Caribbean region, the Dominican Republic has seen a rising demand for energy in the past decade. From 2010 to 2019, total installed capacity of the National Interconnected Electricity System (SENI), which supplies most of the country''s power, increased by more than 52%, according to official figures.
The country relies heavily on imported fossil fuels—including fuel oil, natural gas, and coal—for electric power, but in recent years it has put a priority on generating more of its electricity needs from renewable sources. That policy is on full display at the Renewable Energy Theme Park that opened this month outside the nation''s capital. (See related story in this issue.)
A law enacted in 2007 (Law No. 57-07) established incentives for renewable energy development and set a target of generating 25% of the country''s electricity needs from renewables by 2025. The country has also made an international commitment to reduce its greenhouse gas emissions by 25% by 2030, compared with 2010 levels.
Another source of renewable energy, hydroelectric power, accounts for 14% of the country''s installed capacity but just 6% of the power generated in the past year. Of course, percentages do not stay static; as overall demand continues to grow, renewables will have to keep growing even faster to increase their share of the energy mix. But Vilalta said the 25% target is "achievable."
Last year, Montecristi Solar—billed as the largest solar farm in the Caribbean region, with a capacity of 58 MW—began operating in the northwestern part of the country. Earlier this year, the National Energy Commission (CNE) approved a slate of wind and solar concessions with a total capacity of 874 MW.
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