KR20130126826A - The establishment system of the offshore wind turbines which is combined the fish shelter - Google Patents

Abstract

The present invention relates to an installation system of an offshore wind turbine generator for producing electricity by installing a wind turbine on the sea. It is a technology that is constructed so that offshore wind power generators have functions as a generator and a fishery by integrating Eocho into renewable energy technology that produces power by switching to a circle.
The present invention relates to a technology in which the offshore wind power generator is installed together with the power generation and the reef as well as the wind turbine when the wind turbine is installed on the sea in order to recycle the wind passing through the sea.
The present invention is an installation system of a new concept of offshore wind power generator that can be easily and simply installed unlike the existing method of installing an offshore wind power generator, and a new method capable of diversifying the functions of offshore wind power generators by adding a function as a fish herb. It's about technology.
"Marine wind power generator installation system that can be used as a reef" according to the present invention can install a multi-functional offshore wind power generator with the function of the reef at low cost, the structure is simple, low manufacturing cost, and easy maintenance It has In addition, the production and installation period can be shortened. In other words, through the installation of offshore wind power generators, it has the advantage of having a function as a reef.

Description

The establishment system of the offshore wind turbines which is combined the fish shelter.

The present invention relates to an installation system of an offshore wind power generator for producing electricity by installing a wind power device on the sea, and more specifically, the wind power generator is transported to the sea, installed on the sea, and the air (wind) passing through the energy It is related to renewable energy technology that generates power by switching to a circle. The offshore wind power generators can be used as a fish pond, so that the offshore wind power generators can be used not only as offshore wind power generators but also as fish beds.

Wind power is a power generation technology that generates electricity by converting wind energy. The wind system consists of "mechanical parts, electric parts, control parts".

The mechanical part is a blade that produces rotational force from wind, a rotor including a shaft, a gearbox that converts it to an appropriate speed, and a brake to improve starting, braking and operating efficiency. It is composed of control devices such as pitching system and yawing system.

The electric device part is constituted by a power stabilizing device which supplies a generator and other stable electric power.

Control system is composed of control system and yawing controller which is set up and operated to enable unmanned operation of wind turbine generator, active control of output by controlling the pitch of the blade, And a monitoring system that enables control and determination of the state of the system on the ground.

Wind turbine systems are composed of various types.

[Table 1] shows the types of wind turbine systems.

[Table 1]

When the wind turbine system is divided along the direction of the rotating shaft, it is divided into a vertical axis generator and a horizontal axis generator. Vertical-axis generators have no relation to the direction of the wind, so they can be installed in desert or plains, but they are expensive and inefficient compared to horizontal axis windmills. The horizontal axis generators are simple to install because they are simple to install but they are influenced by the wind direction. Generally, a horizontal axis generator is used for medium to large scale class and a vertical axis generator is used for small class of 100kW or less.

The wind turbine system is classified into a geared type and a gearless type according to the operation mode. Most wind turbines are geared wind turbines using constant-speed induction generators and are equipped with gears that increase the rotational speed of the rotor to match the high rated revolutions of the induction generator.

The Gearless type corresponds to a wind power generation system using a variable-speed operation synchronous (or permanent magnet) generator, and is a direct-drive type in which a rotor and a generator are directly connected to each other without a speed-increasing gear unit using a multi-pole synchronous generator. Although the power generation efficiency is high, it is more expensive than the induction generator and has a large size.

Because wind turbines have higher wind speeds and larger wind turbines can produce more wind energy, the amount of power generated by wind turbines depends on the strength of the wind and the size of the windmill. Also, as the height increases, the wind blows harder, so the generator in the higher place is larger than the generator in the lower place and the generation amount is also higher. For wind power generation, winds blowing at an average speed of more than 4 m / s are required. The velocity of the wind referred to here is not the ground on which we stand, but the speed at which the wind generator is at its wing.

The effects of wind power generation are as follows.

First, the effect of replacing fossil fuels with power generation method using wind kinetic energy is very high.

Secondly, it is possible to supply economical power to the underdeveloped areas such as the islands.

Third, land use can be streamlined by installing in coastal and mountainous areas with excellent wind direction.

Fourth, in some specific areas such as Jeju region, large scale wind farm complexes can be used as tourism resources.

Because wind power generation uses pollution-free and infinite winds scattered everywhere, it has little impact on the environment and can utilize the land efficiently. In the case of large-scale power generation complexes, Is a new energy generation technology. In addition, the area actually used in the wind farm is only 1% of the total area of the whole area including the foundation of the wind turbine, the road, the measurement and the central control room, and the remaining 99% Can be used. Generally, the area required by the power generation method is 1,335 m2 / GWh for wind power, 3,642 m2 / GWh for coal, 3,561 m2 / GWh for solar power, and 3,237 m2 / GWh for photovoltaic power generation. Wind power generation is also very effective in reducing pollutants. If a single 200 kW wind generator operates for a year and produces 400,000 kWh of electricity, it will replace about 120-200 tonnes of coal. -3.2 tonnes, 1.2-2.4 tonnes of NOx, 300-500 tonnes of CO2, 16-28 tonnes of slag and dust, with emissions of suspended substances of approximately 160-280 kg per year There is. The price of wind power generation system varies depending on the wind resource of the installation area. However, the large-scale wind farms in the US currently have a system installation cost of about $ 750 / kW and a power generation cost of about 5 ¢ / kWh. It is competitive. Moreover, if continuous investment and technology development are combined, wind power generation is expected to achieve 3.9 ¢ / kWh unit price target within 15 years. Since the technology related to wind power generation is already in practical use stage, it tends to concentrate on lowering the price of wind power generators and increasing the size and spread of the wind power generators rather than developing element technology. In many countries, wind power generators are being supplied in a competitive manner. By the end of 1994, the world has installed about 3,7600 MW of wind power generators, producing more than 4.5 billion kWh of electricity annually. In 1994, a new wind turbine with a capacity of 611 MW was newly installed, and in India, a wind farm with a size of 235.5 MW was planned to be built in 1995. Currently, the largest number of wind turbines operate in the United States, Germany, and Denmark. In the United States, a large-scale wind farm in California produces about 3 billion kWh of electricity annually in 1993, In 1994, it produced about 3.5 billion kWh of electricity. However, the country with the highest share of wind power is Denmark, which is responsible for 7% of the electricity consumption of 1,135MW from 4900 wind turbines in 1998 and supplies 440,000 households. According to Inara 's "Energy 21" plan, it will raise 10% by 2000 and 50% by 2030. The present state of the domestic technology development was analyzed by the Korea Research Institute of the National Institute of Advanced Industrial Science and Technology (AIST) to analyze the characteristics of wind resources using the statistical data of 64 meteorological stations and measurement data of some parts of the inland area. Due to the nature of the wind resource, which is heavily influenced, the basic statistical data have not been improved yet. Therefore, it is necessary to continue the evaluation of wind power resources in the prospective wind power generation area and the feasibility evaluation project for wind farm construction.

Let's take a closer look at offshore wind power generation.

Offshore wind power is a method of generating electricity by installing wind turbines in water bodies such as lakes, fjord topography, and coastal areas, and converting the kinetic energy of the wind blowing there into mechanical energy by rotating blades. The necessity of offshore wind power generation is due to the development of terrestrial wind power generation. As wind turbines become larger, the limitations of the installation site are revealed. Therefore, offshore wind power generation has been devised as a solution to solve the problems of onshore wind power generation.

The advantages of offshore wind power generation are as follows.

end. Massive installation site

It is not easy to find an area where a wind turbine can be installed in a country with limited territory. In other words, in the case of onshore wind power generation, there is a limitation of installation site. On the other hand, it is possible to construct a large-scale wind power generation complex with a good land acquisition.

I. Periodic and strong winds

The offshore is able to maintain about 1.5 ~ 2 times higher power generation [2] with relatively low fatigue loads compared to onshore wind power generation under similar conditions because of less turbulence of wind and less wind speed depending on height and direction.

All. Eliminate noise and visual pressure

In case of offshore wind power generation, since it is installed at a distance of about 15 km from the coast, problems such as noise caused by the enlargement of the wind turbine and visual over-pressure can be solved

la. Creation of added value as tourist area

The wind turbines installed on the sea produce excellent scenery. For example, in Denver, Denmark, Lunden is known for being a successful example of building a world-class offshore wind farm.

Major technologies of offshore wind power generation are as follows.

end. Offshore wind turbine

Offshore wind turbines basically apply the same technology as onshore wind turbines. It has a life span of about 20 years, and it uses wind turbines of 3 ~ 5MW or more, which are larger than those on the land. Each element is designed and coated to prevent corrosion damage due to salt.

I. Foundation foundation

Basic construction can be divided into four representative types.

(end). Concrete caisson type

It was applied to Vindeby, Middelgrunden and Nysted offshore wind farms. It can be used at relatively shallow water depths of 6 ~ 10m and maintain its position by its frictional force with its own weight and sea floor. The foundation diameter is 12 ~ 15m and there is a possibility of causing stability problem of eccentric slope in bad ground.

(I). Monopile type

It is the most basic type of offshore wind power plant currently used and can be installed at a depth of 25 ~ 30m. Horns Rev, North Hoyle, and Scroby Sands offshore wind farms. It is economical when used for large-scale complexes by fixing large diameter piles on the sea floor by driving or drilling. The base diameter is 3 ~ 3.5m and there is fatigue load or corrosion problem on the member.

(All). Jacket type

Currently, there is a lot of interest in the countries with offshore wind farms. This type, applied in the UK's "The Talisman Beatrice Wind Farm Demonstrator" project, is supported by a jacketed structure and secured to the seabed by piles or piles. It is a large-scale ocean structure, has high track record and high reliability, and is economically advantageous when used in a large-scale complex construction like the monophasic type. [5]

(la). Floating type

Future deep sea winds The floating type, which is a mandatory task of wind power generation, is being studied by many wind power companies so that it can be installed at a depth of 40 ~ 900m.

All. How to connect to the grid

(end). Individual connection

It does not affect other projects and features the shortest cable length. Although the location of the problem can be clearly identified when a problem occurs, it has a disadvantage that it requires a large area for cable connection, lacks operational flexibility, and has a large environmental impact.

(I). Mesh Grid

It is possible to minimize the efficiency deterioration in the partial load due to the use of the intermediate transmission, but the design considering the technical and commercial aspects is required and the investment cost is great. At full load there is no advantage over other methods. [5]

(All). Radial Configuration

It is easy to receive licenses because there is not enough space for cable connection and the environmental impact is small. However, there is a disadvantage that the length of the cable becomes longer and the operational flexibility is insufficient.

As can be seen from the above, the most important aspect of offshore wind power generation is in the process of installing offshore wind power generators at sea. There is a problem in that it is difficult and costly to install the wind power generation equipment at sea. In addition, its function is simplified by using only a wind power generator, so the offshore wind farm is not equipped with various problems and has a simple problem compared to a high installation cost.

The present invention relates to an offshore wind power generation system that can be used as a fishery in an offshore wind power generator that generates electricity by installing a wind power generator on the sea in order to recycle wind passing through the sea. The present invention is an installation system of a new concept of offshore wind power generator that can be easily and simply installed unlike the existing method of installing an offshore wind power generator. In addition, the offshore wind power harvester has the function as a fish reef to produce energy through offshore wind power as well as to have the function as a fish reef so that it is possible to add the function of one stone two birds (一 石 二 鳥).

"Marine wind turbine installation system that can be used as a reef" according to the present invention is "eocho manufacturing process, steel structure manufacturing process, buoyancy concrete structure manufacturing process, wind power plant assembly process, transfer to the installation site, offshore wind power generator Fixed work process ". Unlike the existing basic construction method, the floating structure is transported to the sea and fixed with a pile, and the offshore wind turbine is manufactured from the beginning and installed on the sea floor so that the offshore wind power generator additionally functions as a fish. The main feature is that.

"Marine wind turbine generator system available as a reef" according to the present invention can be expected the following effects.

First, offshore wind power can be installed at sea at low cost.

Second, it has a simple structure, low manufacturing cost, and convenient maintenance.

Third, it is possible to shorten the production and installation period. In other words, it has the advantage of minimizing the installation period of offshore wind turbines.

Fourth, because the offshore wind power generator has a function as a fish pond in addition to the function as a wind power generator, it can have the effect of two birds.

1 is a schematic conceptual view showing the installation process of the "offshore wind turbine generator system available as a reef" according to the present invention.
Figure 2 is a schematic conceptual view of the reefs according to the "offshore wind turbine generator system available as a reef" according to the present invention.

"Marine wind turbine installation system that can be used as a reef" according to the present invention is "eocho manufacturing process, steel structure manufacturing process, buoyancy concrete structure manufacturing process, wind power plant assembly process, transfer to the installation site, offshore wind power generator Fixed work process ".

'Reef production process' is a process of manufacturing reinforced concrete to install and grow various kinds of fish and seaweed by installing on the seabed of offshore wind power generator.

'Steel structure manufacturing process' refers to a process of manufacturing a support for mounting a wind generator (blade, generator, etc.). The steel structure consists of a tower part for installing a wind turbine and guard barge for protecting the steel structure from falling down while moving at sea.

'The buoyancy concrete structure manufacturing process' refers to the process of manufacturing the concrete structure for the purpose of maintaining buoyancy in order to transfer to the sea to install the offshore wind power generator.

'Wind power plant assembly process' connects and installs tower and guard barge, pre-fabricated steel structures, blades and wind turbines, and various generators to concrete structures built to maintain buoyancy. It means the process. Before assembling the wind power plant, the buoyancy concrete structure, which has been manufactured in advance, is attached to the rock wall and filled with water to sink to the bottom. Then combine the buoyant concrete structures with the steel structures and the wind turbines.

'Transfer to the installation site' refers to the process of transporting the wind power unit combined with the buoyancy concrete structure near the sea to be installed, this time using a tugboat (Tugboat).

“Fixing work process of offshore wind power generator” is a process of fixing offshore wind power generators that have been transported using tugboats. The offshore wind turbine generator should be installed in a flattened place and the foundation piles should be installed for fixing.After the foundation pile work, the guard pants installed to protect the steel structures from falling while moving at sea ( Guide barge).

Claims (1)

"Reef manufacturing process, steel structure manufacturing process, buoyancy concrete structure manufacturing process, wind power plant assembly process, transfer to installation site, offshore wind turbine fixed work process", etc .;
'Reef manufacturing process' is made of reinforced concrete so that various kinds of fish and seaweed can be inhabited and grown by installing on the seabed of offshore wind power generator;
'Steel structure manufacturing process' is the process of manufacturing the support for installing wind power generators (blades, generators, etc.). The steel structure is the tower part for installing the wind power generators and the steel structure does not fall while moving on the sea. Guard barge, etc. to protect against;
'Buoyancy concrete structure manufacturing process' consists of producing a concrete structure for the purpose of maintaining buoyancy in order to transfer to the sea to install the offshore wind power generator;
'Wind power plant assembly process' connects and installs tower and guard barge, pre-fabricated steel structures, blades and wind turbines, and various generators to concrete structures built to maintain buoyancy. Before the assembly process of the wind power plant, attach the pre-made buoyancy concrete structure to the rock wall and fill it with water to sink to the bottom, then the buoyancy concrete structure, steel structure and wind power generation device. Are configured to couple them together;
'Transfer to the installation site' is a process of transporting the wind power unit combined with the buoyancy concrete structure near the sea to be installed, wherein it is made to transfer using a tugboat (Tugboat);
'Fixing work process of offshore wind turbine' is a process of fixing offshore wind power generator that has been transported using tugboat.The dredging part is required to be flattened before installing offshore wind generator. In order to lower the offshore wind power generator in a flattened place and to install a foundation pile for fixing, and to protect the steel structure from falling over the sea after the foundation pile work, the guard pants installed ( "Offshore wind turbine installation system for use as a reef", characterized in that it is configured to remove the guide barge)

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