Tags Posts tagged with "transmisión"

transmisión

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With MVDC PLUS (Medium Voltage Direct Current Power Link Universal System), Siemens is introducing a new direct-current transmission system to the market that will be serve as an efficient transmission route in medium-voltage AC grids from 30 to 150 kV. Siemens has developed the transmission system for grid operators who need to enlarge their infrastructure to handle the increasing volumes of power fed into the distribution system from distributed and renewable energy sources and also keep their network stable. Distances of up to 200 km can be bridged with MVDC PLUS. Siemens offers the medium-voltage DC transmission system as a compact system in three variants: for a transmission capacity of approximately 50, 100, and 150 MW at DC transmission voltages of 20 to 50 kV.

This makes MVDC PLUS suitable for connecting small communities in sparsely populated regions to the grid, and for connecting and stabilizing low-power distribution grids regardless of their voltage and frequency. This system enables a regulated power exchange between regional medium-voltage networks and microgrids. It also has greater independence from the high-voltage network. Cables as well as overhead lines can be used for transmission. It’s also possible to use existing routes when it’s necessary to increase power capacity without needing to move up to high-voltage level.

 

The transmission system also allows operators to set up a power link between islands or offshore platforms and the mainland in order to avoid maintenance measures and costs for a diesel generator backup. For example, the system can be used as a backup solution for medium voltage in the production industry, where it increases the availability of machines and equipment and reduces production losses. As a backup power supply for data centers, MVDC PLUS ensures, for example, classification in a quality stage (“tier”). The medium-voltage DC transmission system is also attractive because of its cost efficiency and the short implementation time for combinations at the local level with different financing models, which are increasing in importance in countries that have a growing proportion of renewable and distributed energy sources.

MVDC technology is based on the HVDC PLUS technology used in the Siemens HVDC transmission system, but is reduced to its basic functions. Like HVDC PLUS, the medium-voltage transmission system operates with voltage-source converters (VSC) in a modular multilevel converter design (MMC) that convert alternating current into direct current and vice versa. The current on the transmission route can flow in both directions. Thanks to the use of insulated-gate bipolar transistors (IGBT), the commutation processes in the converter run independent of the network voltage. Both converter stations can be operated as a static synchronous compensator (statcom). The extra high-speed control and protection intervention capabilities of the converters ensure the stability of the transmission system, which reduces network faults and malfunctions in the three-phase grid. This significantly improves the security of supply for energy suppliers and energy customers alike.

Source: Siemens

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Abengoa, the international company that applies innovative technology solutions for sustainability in the energy and environment sectors, has been awarded by the Oman Electricity Transmission Company (OTEC) the construction of two new electric substations and the associated transmission lines in Northeast Oman.

Abengoa will be responsible for the construction, supply, assembly, and commissioning of two new substations 132/33kV, one located in Samad and the other in Sinaw. The construction project is expected to last for two years. Subcontracting of local businesses for specific tasks will generate local employment in the area throughout the construction period.

Since 2012, Abengoa is present in Oman, where it is currently developing the substation Al Dreez for OETC as well.

With this new project, Abengoa consolidates its position in the Middle Eastern market, keeping its leadership in the electric transmission industry with more than 26,000 km and almost 300 substations around the world in the past 11 years.

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Siemens has been awarded an order from the transmission grid operator Amprion for the supply, installation and commissioning of a reactive power compensation system for stabilizing the power supply grid in the Greater Frankfurt Area. In navigating through the energy turnaround, this is how Amprion will tackle the challenges facing the power grid created by an ever-increasing number of fluctuating renewable energy sources feeding power into the grid. The grid operator will use the reactive power compensation system for dynamic voltage stabilization of the transmission grid.

The order includes a latest-generation static VAR compensation system SVC Plus, which has undergone further development by Siemens, among other things to minimize the environmental impact of the system, such as noise emissions and reducing the size of the system to a minimum. Siemens will erect the system in Kriftel, a community in the Rhine-Main region located between Frankfurt and Wiesbaden, and will integrate it there into an existing switchgear system. The volume of the order is around EUR 25 million; the system is scheduled to be commissioned at the end of 2017.

The core of SVC Plus, an advanced Statcom (static synchronous compensator), is its multilevel converter technology. By contrast with other self-commutated converter topologies, the voltage waveshape produced by SVC Plus is practically sinusoidal by virtue of the multilevel technology. This makes the low-frequency harmonic filters often used in earlier solutions superfluous and substantially reduces the space requirements for the overall unit.

The power converter is based on a modular topology. Each converter branch consists of series-connected insulated gate bipolar transistor modules (IGBT power modules). The SVC Plus system for Amprion is designed for a rated capacity of +/- 300 MVAr and laid out in several power converters connected in parallel. Redundant power modules are included in the phases of each converter branch. In the rare event of a fault, these would continue to ensure operation at full rated power without a forced shutdown. Replacement of defective components could then be postponed until the next scheduled maintenance. The average availability for an SVC Plus system therefore far exceeds 99 percent. Siemens has received orders worldwide for more than 50 SVC Plus systems in the last four years alone.

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The Secretary of Energy and Chairman of the Board of the CFE, Mexico’s Federal Electricity Commission, Pedro Joaquín Coldwell, and its Chief Executive, Enrique Ochoa Reza, have announced the start of the tender processes for 24 electric and natural gas infrastructure projects with a total estimated investment of US$9.836bn. These involve eight natural gas pipeline projects; four power plants; three transmission line and substation projects; and nine power distribution projects. These projects will add 2,385 km to the gas pipeline network, 1,442 MW to the installed capacity of the National Electrical System, 122 km to the transmission grid and 2,962 to the distribution network.

Transparencia Mexicana will accompany the bidding processes of the eight gas pipelines, the geothermal plant and the fifth phase of the losses reduction project. The other projects will have benefit from a social witness appointed by Mexico’s Civil Service Secretariat. And this is despite the costs involved as the CFE is not required to involve this entity in the process.

At the event organised to present these tenders, the CFE’s Chief Executive commented that thanks to the Energy Reform, the Federal Electricity Commission has entered a new phase as the State power utility with the primary objective of offering a better quality and more environmentally-friendly energy service at lower cost. He added that to achieve this goal, it is essential to have a modern energy generation, transmission and distribution infrastructure in addition to sufficient gas pipelines to transmit natural gas.

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Dr. Ochoa Reza explained that these gas pipelines, together with the 11 that are already under construction and undergoing the tender process, the CFE in conjunction with PEMEX, coordinated by the Energy Secretariat, will comply with the target established by the National Infrastructure Programme to increase the National Gas Pipelines System by 75% during the term of office of President Enrique Peña Nieto.

The Secretary of Energy, Pedro Joaquín Coldwell added that the new gas pipelines will cover the energy needs of the central, eastern and western regions of the country.
He highlighted that this gas pipeline grid will connect the main industrial and commercial areas of the Republic, thus resulting in a costs reduction. According to the Secretary, this will make businesses more competitive and the country as a whole more attractive for the location of new factories.
The event, that was held in the Auditorium at CFE, was also attended by Emilio Lozoya Austin, CEO of Pemex; César Emiliano Hernández Ochoa, Under-Secretary of Electricity; and David Suárez, Director General of CENAGAS, the National Control Center for National Gas.

The details of the project tenders are as follows:

Gas pipelines

Tula – Villa de Reyes Gas Pipeline. 280 km long. Capacity 550 MCF/D. Investment US$420m. Prebases publication June 2015; commercial operation December 2017.
Villa of Reyes – Aguascalientes – Guadalajara Gas Pipeline. 355 km long. Capacity 1 BCF/D. Investment US$555m. Prebases publication July 2015; commercial operation December 2017.
Sur de Texas – Tuxpan Gas Pipeline (Offshore). This will transmit natural gas via an underwater route through the Gulf of Mexico, from the south of the state of Texas in the US to Tuxpan in Veracruz State, Mexico. 800 km long. Capacity 2.6 BCF/D. Investment US$3.1bn. Prebases publication July 2015; commercial operation June 2018.
Nueces – Brownsville Gas Pipeline. Will transmit natural gas originating in the south of the US and will supply natural gas to the offshore gas pipeline. 250 km long. Capacity 2.6 BCF/D. Investment US$1.55Bn. Publication of the Draft Application July 2015; commercial operation June 2018.
La Laguna – Aguascalientes Gas Pipeline. 600 km long with 1.15 BCF/D capacity. Estimated investment US$1bn. Prebases publication July 2015, commercial operation December 2017.
Empalme Branch.20 km long. Capacity 236 MCF/D. Investment US$35m. Prebases publication August 2015; commercial operation April 2017.
Hermosillo Branch. 48 km long, it will transmit natural gas from the Sásabe – Guaymas pipeline to the Hermosillo CCP plant (Sonora). Capacity 100 MCF/D. Investment US$68m. Prebases publication August 2015; commercial operation June 2017.
Topolobampo Branch. This will transmit 248 MCF/D of natural gas from the El Encino – Topolobampo gas pipeline to the North-Eastern (Topolobampo II) and Topolobampo III CCPs, in Sinaloa. 32 km long. Investment US$55m. Prebases publication October 2015; commercial operation March 2018.

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Power plants

Los Azufres III, Phase II, Geothermal Plant. Hidalgo and Zinapécuaro, Michoacán. This involves the construction of a geothermal 25 MW plant. Prebases publication May 19; conditions July 2015 and commercial operation June 2018. Investment US$63m.
Internal Combustion Plant (Dual), Baja California Sur VI. La Paz, Baja California Sur. This involves the construction of a 42 MW internal combustion plant with a dual fuel oil-natural gas powered engine. Investment US$105m. Prebases publication July 2015; commercial operation May 2018.
San Luis Potosí Combined-Cycle Plant. Villa de Reyes, San Luis Potosí. This concerns the construction of a 790 MW CCP with an investment of US$864m. Prebases publication July 2015; entry into commercial operation April 2019.
Eólica Sureste II and III Plant. The project is located in the municipality of Ixtepec, Oaxaca. This will comprise two modules with a total capacity of 585 MW. Investment US$1.079bn. Prebases publication July 2015 and operational start-up December 2017.

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Transmission lines and electrical substations

1902 North-East Substations and Compensation (3rd phase). Sinaloa. It comprises five transmission lines of 400 and 115 kV, 74 km long. It will include two 500 MVA substations and eight feeders of 400 and 115 kV. The project will be executed performed under the Financed Public Works format. Investment US$35m. Prebases and conditions published in April and May 2015; commercial operation March 2017.
1302 North-East Transformation. Coahuila. This comprises five 115 kV transmission lines, 25 km long. It will include a 500 MVA substation and eight feeders of 400 and 115 kV. Investment US$37m. Prebases and conditions published in April and May 2015; commercial operation March 2017.
Baja California Transmission and Transformation (5th phase). Baja California. It comprises two transmission lines, 230 and 161 kV respectively, and a total length of 23 km. It will include three substations with two 230 kV feeders and two at 161 kV. Investment US$19m. Prebases publication June 2015; commercial operation January 2017.

Power distribution

Substations and Distribution Lines 1920 (6th phase). Hermosillo, Sonora. It comprises an electric substation with a capacity of 30 MVA and 2 115 kV feeders and six at 13.8 kV. Investment US$6m. Prebases and conditions published in May and June; commercial operation October 2016.
2021 Project: Reduction in energy distribution losses (8 phases). 44 projects divided into eight phases. Its objective is to reduce energy losses in Campeche, Chiapas, Mexico City, Mexico State, Morelos, Quintana Roo, Sinaloa, Tabasco and Veracruz. It includes 1,217,399 meters; 36,612 distribution transformers and 2,962 km of transmission lines.
Reduction in energy distribution losses 2021 (1st phase). Morelos. Supply and installation of 16,048 measurers, 957 distribution transformers and a 37 km line. Investment US$14m. Prebases and conditions published in May and June; commercial operation October 2016.
Reduction in energy distribution losses 2021 (2nd phase). Sinaloa. Supply and installation of 5,727 meters. Investment US$5m. Conditions June 2015; commercial operation October 2016.
Reduction in energy distribution losses 2021 (3rd phase). Veracruz. Supply and installation of 20,456 meters. Investment US$8m. Prebases and conditions published in April and June; commercial operation September 2016.

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La Comisión Europea aprueba la ayuda francesa al programa de investigación SuperGrid para el desarrollo de redes de transmisión eléctrica innovadoras

The European Commission has concluded that the aid granted by France to the Supergrid Institut pour la transition énergétique for a research project aimed at developing a new generation of long-distance energy transmission networks complies with the EU rules on State aid. It will promote important European objectives such as securing energy supplies and protecting the environment without unduly distorting competition.

Joaquín Almunia, Commission Vice President responsible for competition, stated: “Securing energy independence and reducing CO2 emissions in Europe are key priorities for the Commission. The SuperGrid project pursues these very objectives. The project will have an undeniable scientific impact, while the distortions of competition will be limited.”

The SuperGrid networks will use high-voltage direct and alternating current (up to a million volts) designed for the large-scale transmission of energy from renewable sources, many of them off-shore, that are far from the centres of consumption. These networks, together with flexible storage facilities, will make it possible to manage the intermittent nature of renewables and will ensure network stability and security.

In 2013 France notified its plans to grant a subsidy of €86.6 million to SAS SuperGrid, a start-up established to manage the public-private partnership created for this purpose. The Commission reviewed the aid for compatibility with its guidelines on aid for research, development and innovation (R&D&I), adopted in May 2014.

R&D work will be necessary on long-distance energy transmission (including a new generation of cables), new transformers and storage and stabilisation technologies. The expertise of a number of partners (6 public and 6 private) will be harnessed to develop the supergrid technologies. If the R&D projects prove successful, patent licences will be sold to interested industrial firms on market terms.

On completing its review, the Commission concluded that the SuperGrid project suffered from market failures justifying the use of public aid and that the aid gave enterprises a necessary and sufficient incentive to change their behaviour and carry out a project they would not otherwise have undertaken. Given the openness of the technology markets and the scope for exploiting the intellectual property rights arising from the project, there was no risk of competition being distorted.

The global supergrid market comprises network electrotechnical systems, energy flow management systems, and cables. The project will also make it possible to target related markets, in particular the rail transport powertrain market and the variable‑speed hydraulic pump-turbine market.

EVACUANDO LA ELECTRICIDAD DE LOS PARQUES EÓLICOS MARINOS

In line with the statistics from the first quarter of 2014 published by the EWEA, as at 1 July, a total of 2,304 offshore wind turbines that are fully connected to the grid have been installed in European waters, distributed over 73 offshore wind farms with a total installed capacity of 7,343 MW. In addition, the offshore wind power capacity under construction adds up to an impressive figure of 4,900 MW. Transporting the electricity generated by these offshore wind farms back to the mainland presents a challenge, particularly because these farms are situated ever further from the coast. But this challenge has been overcome thanks to high-voltage direct current transmission technology.

In the German waters of the North Sea, TenneT, the German-Dutch transmission grid operator, is constructing a massive infrastructure to transmit electricity from a total of 18 offshore wind farms via ten converter platforms and their corresponding underwater cables.

The transportation of this electricity is undertaken using high-voltage direct current transmission technology, the best-suited to these types of electricity transmission projects.

Article published in: FuturENERGY September 2014

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Iberdrola Ingeniería has begun constructing the Votkinskaya substation, the first major project within the electricity transmission grid business in Russia, after being awarded a contract worth €32 million by RusHydro, the world’s second largest hydropower company.
This facility will become the largest electricity transmission enclave in central Russia and among the most important in the country. The substation has been designed for receiving energy generated by the hydropower plant of the same name, which boasts a power capacity of 1,020 MW, and supplying power to a million residents living in the regions of Perm, Udmurt, Kirov, Bashkir and Sverdlovsk.
Iberdrola Ingeniería will erect this new infrastructure on the same site as the current substation that was constructed in 1963 and, while still operating, has become obsolete.
This IBERDROLA subsidiary will tackle numerous challenges with this project, since it will construct a 500 kV substation for the first time and do so in extreme weather conditions, as temperatures that could drop as low as -38º, while meeting strict deadlines: the substation should be operative by the end of this year.
The new Votkinskaya substation will be housed inside a building and equipped with cutting-edge technology in GIS (Gas Insulated Switchgear), which is the most modern, secure and efficient on the market. This enables the facilities to not only take up 90% less space than conventional models while better adapting to the environment but also to incorporate the latest in technological advances.
IBERDROLA INGENIERÍA will construct these facilities on the basis of the experience acquired commissioning state-of-the-art substations of this sort throughout the last 10 years in Spain. This experience has made the company a universal benchmark in technological renovations in the electricity distribution sector.
For this Votkinskaya turnkey project, the IBERDROLA subsidiary will handle the engineering, storage, construction and commissioning of the infrastructure. The work will be undertaken with the old substation still in service, adding a certain degree of complexity to the work and requiring the establishment of a series of stages to hand control of the original station over to the new one.
It is also worth mentioning the elevated level of quality required for this project by RusHydro, a Russian power utility with 36,005 MW installed power in this country, with nine hydropower stations located along the Volga-Kama river, wind farms and dozens of mini-hydropower stations.

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