KR101507008B1 - Remote system for evaluating safety of offshore wind turbine structure - Google Patents

Abstract

Provided is a system for remotely evaluating the safety of offshore wind turbine structures which can remotely determine the safety of substructures according to whether offshore wind turbine structures vibrate using an acceleration sensor installed in each of a plurality of offshore turbine structures, can determine whether there is an abnormal offshore wind turbine structure by comparing the offshore turbine structures to each other using the acceleration sensor installed in each of the offshore turbine structures; and can accurately determine whether the offshore turbine structures are normal by considering external force data on a wave, a current, a wind, and an earthquake affecting each offshore turbine structure. The system for remotely evaluating the safety of offshore wind turbine structures according to the present invention comprises: acceleration sensors which are installed in each offshore wind turbine structure including a substructure, a tower, and nacelle, and measure acceleration corresponding to vibrations in each of offshore wind turbine structures; a field terminal for collecting field data on the offshore wind turbine structures, and performing wired or wireless transmission of the collected data and the acceleration signals measured by the acceleration sensors; a remote terminal for remotely evaluating the safety of the offshore wind turbine structures by converting the acceleration signals into displacements, comparing the displacements with a reference displacement, performing a first determination of the normality of the offshore wind turbine structures based on the displacement comparison result, and performing a second determination of the normality of each offshore wind turbine structure by comparing the first determination data of each offshore wind turbine structure to each other.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a remote safety evaluation system for an offshore wind turbine,

The present invention relates to a remote safety evaluation of an offshore wind power generation structure, and more particularly, to a remote evaluation on the safety of a lower support structure of a plurality of offshore wind power generation structures installed on the sea, The present invention relates to a remote safety evaluation system for an offshore wind power generation structure that measures and monitors vibration of an offshore wind power generation structure using an acceleration sensor.

Generally, a wind turbine generator that generates electricity using wind is constructed so that a blade (or a propeller) is installed on a rotary shaft of a generator to generate power by using rotational force generated by the rotation of the blade by the wind. Such a wind turbine is a device for converting wind energy into electric energy, usually composed of a blade, a transmission, and a generator, and rotates a blade of a wind turbine, and generates electric power by rotating the blade.

Here, the blade is a device for converting wind energy into mechanical energy by being rotated by the wind, and the transmission device transmits the rotational force generated by the blade to the transmission gear through the central rotation axis and increases to the rotation speed required by the generator, The generator is a device that converts the mechanical energy generated by the blade into electric energy.

Such a wind power generation system is easy to operate and manage because it is simple in its structure and installation, and can be unmanned and automated. In the past, wind power structures were mainly located on land, but due to problems such as wind resource capacity, aesthetics, and location constraints, it is in recent trends to build a large scale wind farm on the sea. However, in order to construct a wind turbine structure safely at sea, a safe installation method for a blade and a tower structure to be installed in a high position is required.

Specifically, a wind turbine system is a system configured to convert kinetic energy by wind into electrical energy, and can be divided into onshore and offshore depending on the environmental conditions to be installed. In addition, there are various methods of installing such a pile or a pile, such as a hovering type, a hydraulic pressure type, and a suction type. In order to install a large diameter file or pile, it is necessary to install the pile in a vertical direction.

In this wind turbine installation, it is the role of the tower to position the nacelle capable of generating wind power at a given height to achieve the desired and desired power. There are horizontal and vertical types of wind turbines. In recent years, development and installation of horizontal type wind turbines have been actively carried out in domestic and overseas.

Figure 1 is a schematic illustration of a wind power support structure.

Referring to FIG. 1, an offshore wind power generation structure is roughly divided into a turbine and a support structure. In this case, the turbine basically applies the same technology as the offshore wind turbine 10. These offshore wind power structures have a life span of about 20 years, and wind turbines of 3 ~ 5MW or more, which are larger than those on land, are applied. Each component of this offshore wind power structure can be designed and coated to prevent corrosion damage due to salinity.

Here, the support structure is typically a concrete caisson type, a mono-pile type, a jacket type, a tripod type, and a floating type ) Can be divided into five types can be explained.

Concretely, the concrete caisson type is gravity type, which is used in the early offshore wind power generation complex because it is easy to manufacture and install, and was applied to Vindeby, Middelgrunden offshore wind farm, and the like. These types of concrete caissons can be used at relatively shallow water depths of 6 to 10 m and maintain their position with their own friction and seabed friction. At this time, the base diameter of concrete caisson type is 12 ~ 15m.

Also, as shown in FIG. 1, the monophile type 20 is the most commonly used offshore wind turbine foundation system, and can be installed at a depth of 25 to 30 m. Horns Rev, North Hoyle offshore wind farms, etc., and large diameter piles on the seabed are fixed by driving or drilling. It is economical. At this time, the base diameter of the monofile type is 3 to 3.5 m.

The jacket type is currently being shown with great interest in the countries with offshore wind farms, and can be installed at a depth of 20 ~ 80m. These jacket types are supported by a jacketed structure and secured to the seabed with piles or piles. Such a jacket type is a structure of a large water depth ocean, has high performance and high reliability, and is advantageous in that it is economically advantageous when used in a large-scale complex composition like the monophasic type 20 described above.

As shown in FIG. 1, the tripod type 30 is constructed by extending the above-described monofile type 20 downward and can be installed at a depth of 20 to 80 m. This tripod type 30 is characterized in that it does not need to clean the floor but uses a small diameter file, but an anchor file is required, which increases the manufacturing cost.

Also, as shown in FIG. 1, the floating type (40) is a mandatory task of future deep-sea wind power generation, and many wind turbine companies are studying to be installed at a depth of 40 to 900 meters.

On the other hand, the offshore wind power generation has attracted much attention due to the enormous amount of wind energy and the possibility of infinite use of the energy source, so that the offshore wind power generator market is also getting larger and the offshore wind power for installing a large- Output power is increasing.

2 is a view for explaining an external force acting on an offshore wind power generating support structure.

As shown in FIG. 2, since the offshore wind power generation supporting structure is installed on the sea surface, unlike the existing onshore wind power generating supporting structure, the offshore wind power generating supporting structure is greatly influenced by external forces such as waves, tides and winds. At this time, in order to evaluate the behavior of the offshore wind power generation structure according to the related art, a moving coil type sensor for measuring an expensive vibration velocity should be used instead of a piezo sensor, which is a general acceleration sensor, To perform continuous measurements of dynamic signals such as signals and to monitor remotely, an expensive Dynamic Data Logger should be used.

Also, as the output power of the offshore wind power generation increases, the size of the tower and the rotor nacelle of the generator increases, and the size of the support structure for supporting the tower is increasing. As the size of the existing offshore wind support structure increases, There is a problem in that the safety of the support structure can be greatly reduced due to the increase in the wave force acting on the structures (gravity type and mono file).

As described above, development of an offshore wind turbine is progressing actively in order to overcome limitations of onshore wind power generation due to narrow land and civil affairs problems and to utilize high quality wind resource on the sea. In addition, due to the limitation of size and accessibility of structures and machine elements to reduce construction costs, there is a need for technology development for effective maintenance and reliability assurance. Thus, the importance of developing effective maintenance technology through application of condition monitoring system is increasing.

Unlike onshore wind turbine generators, offshore wind turbine generators cost much to build and construct support structures, and there is a growing interest in maintenance and soundness monitoring. For example, the support structure of an offshore wind turbine can be divided into towers, substructures, and bases, which are important structures that serve to support generator structures including nacelles and blades, Stop operation and cause massive cost loss and safety problems.

On the other hand, as compared with onshore wind power generation structures, offshore wind power generation structures can generate a large vibration as compared with onshore wind power generation structures due to various external forces such as waves, tides, winds, and earthquakes. In other words, the offshore wind power generation structure is exposed to various marine environment conditions, so it is essential to develop design technology and maintenance technology considering this. For effective maintenance of offshore wind power structures, development and application of structural health monitoring technology for offshore wind power structures is required.

In other words, to ensure the structural safety of offshore wind power generation structures and to maintain effective operation for continuous operation, it is necessary to constantly monitor the current state of the structure, observe the aging of the accumulated structures over a long period of time, There is a need to apply the technique.

Korean Patent No. 10-1175769 filed on Apr. 2, 2012, entitled " Structural Safety Diagnosis Device and Method for Diagnosing Structural Safety Using the Device " Korean Published Patent No. 2013-114515 (Published Oct. 18, 2013) Title of Invention: "Static and Dynamic Positioning System and Method of Offshore Structures Using Real-Time Monitoring of 6 DOF Motion of Offshore Structures" Korean Patent No. 10-1321710 filed on April 9, 2012, entitled " Static and Dynamic Positioning System and Method of Offshore Structures Using Real Time Monitoring of Mooring Line " Korean Unexamined Patent Publication No. 2012-139891 (Publication date: December 28, 2012), title of the invention: "Remote measurement system of tilt sensor structure and structure inclination" Korean Patent Publication No. 2014-8950 (published on January 22, 2014), entitled "Rotor Lock Control System for Wind Turbine Generators"

The present invention has been made to solve the above problems and it is an object of the present invention to provide a wind turbine structure capable of easily determining the safety of a lower support structure depending on vibration of an offshore wind power generation structure using an acceleration sensor installed on each of the offshore wind power generation structures To provide a remote safety assessment system for offshore wind power structures.

According to another aspect of the present invention, there is provided a wind turbine structure for an offshore wind turbine, including: a plurality of offshore wind turbine structures; And to provide a system for evaluating the remote safety of an offshore wind power generation structure capable of judging whether or not the offshore wind power generation structure can be judged.

It is another object of the present invention to provide an offshore wind power generation system capable of more accurately determining whether an offshore wind power generation structure is abnormal in consideration of external force data of waves, algae, wind and earthquakes that affect each offshore wind power generation structure, And to provide a system for evaluating remote safety of a power generation structure.

According to an aspect of the present invention, there is provided a system for evaluating the remote safety of a marine wind power generation structure, the system comprising: a plurality of offshore wind power generation structures each including a lower structure, An acceleration sensor for measuring an acceleration corresponding to each vibration of the structure; A field terminal for collecting field data of the plurality of offshore wind power generating structures and remotely transmitting the measured data together with the acceleration signal measured by the acceleration sensor by wire or wireless; And comparing the acceleration signal transmitted from the field terminal with a displacement and comparing the acceleration signal with a preset reference displacement to firstly determine whether the offshore wind power generation structure is abnormal according to a result of the displacement comparison, And a remote terminal for remotely evaluating the safety degree of the offshore wind power generation structure by secondarily determining whether each of the offshore wind power generation structures is abnormal by comparing the first judgment data of the offshore wind power generation structure with each other, Evaluates the individual safety degree of the offshore wind power generating structures and the overall safety degree of the offshore wind power generating structures, respectively, by combining the results obtained by the off-
The acceleration sensor is installed in a lower structure, a tower, and a nacelle, respectively, so that an acceleration sensor is installed in each of a plurality of offshore wind power generating structures. Thus, an external force And it is possible to more accurately determine whether the lower support structure of the offshore wind power generation structure is abnormal.

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Here, the remote terminal may include: a transceiver for receiving the acceleration signal and the site data from the field terminal in response to the vibration of the offshore wind power generation structure; An A / D converter for converting the received acceleration signal and the field data into a digital signal; A remote terminal control unit for converting the acceleration signal into a displacement and comparing the acceleration signal with a predetermined reference value to remotely evaluate the safety of the offshore wind power generation structure; An input unit for inputting data necessary for operation of the remote terminal control unit; A display for outputting safety evaluation data of the offshore wind power generation structure output from the remote terminal control unit to a screen; And a database for storing data input to the remote terminal control unit and data processed by the remote terminal control unit.

Here, the remote terminal control unit may include an acceleration-displacement conversion unit for integrating the received acceleration signal and converting the received acceleration signal into a displacement; A reference value setting unit for resetting the displacement reference value according to the field data; A displacement comparison unit for comparing the displacement converted by the acceleration-displacement conversion unit with the displacement reference value reset by the reference value setting unit; A structure abnormality determination unit for primarily determining whether the offshore wind power generation structure is abnormal according to the displacement comparison result; An inter-structure data comparing unit for comparing the data of each of the offshore wind power generating structures with each other to determine whether the off-axis wind power generating structure is abnormal; And a structure safety degree judging unit for evaluating the safety degree of each of the offshore wind power generating structures by combining the results primarily judged by the structure abnormality judging unit and the results judged by the data comparing unit between the structures, have.

Here, the structure abnormality determination unit may set a reference value based on the finite element structure analysis for the offshore wind power generation structure in advance.

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Here, the field terminal may include a field data collector for collecting on-site external force data of waves, algae, wind, and earthquakes affecting each of the offshore wind power generation structures from sensors installed in the offshore wind power generation structure; A receiving and amplifying unit for receiving and amplifying the analog acceleration signal measured by the acceleration sensor; An A / D converter for converting the amplified analog acceleration signal into a digital signal; A field terminal controller for converting the field data collected by the field data collector and the acceleration signal digitally converted by the A / D converter into serial data for remote transmission; And a transceiver for transmitting data processed by the field terminal controller to the remote terminal by wire or wirelessly.

Here, the field terminal is installed in any one of a plurality of offshore wind power generation structures, and the field terminal collects data transmitted from each of the offshore wind power generation structures and collectively transmits the collected data to the remote terminal.

Here, the offshore wind power generation structure may be selected from concrete caisson type, mono-pile type, jacket type, tripod type, and floating type. And the upper structure of the towers and the nacelle may be installed on any one of the lower structures.

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According to the present invention, the safety of the lower support structure depending on the vibration of the offshore wind power generation structure can be easily determined from a remote location by using an acceleration sensor installed in each offshore wind power generation structure. At this time, it is possible to determine whether the offshore wind power generation structure is vibrated at a remote place by using a comparatively economical acceleration sensor instead of the existing moving coil type sensor for measuring vibration speed.

According to the present invention, it is possible to easily determine whether any one of the offshore wind power generating structures is abnormal by comparing and determining the anomaly of each of the offshore wind power generation structures using an acceleration sensor provided in each of the plurality of offshore wind power generating structures . As a result, offshore wind power structures with abnormal safety can be followed up.

 According to the present invention, it is possible to more accurately determine whether an offshore wind power generation structure is abnormal, taking into account external force data of waves, algae, wind, and earthquakes that affect each offshore wind power generation structure.

Figure 1 is a schematic illustration of a wind power generation structure.
2 is a view for explaining an external force acting on an offshore wind power generation structure according to a conventional technique.
3 is a schematic view for explaining the principle of a remote safety evaluation system of an offshore wind power generation structure according to an embodiment of the present invention.
FIG. 4 is a diagram for explaining the offshore wind power generation structure in the remote safety degree evaluation system of the offshore wind power generation structure according to the embodiment of the present invention.
5 is a view illustrating a field terminal installed on a first offshore wind power generation structure in a remote safety degree evaluation system of a offshore wind power generation structure according to an embodiment of the present invention.
6 is a block diagram of a remote safety rating system for an offshore wind power structure according to an embodiment of the present invention.
7 is a detailed configuration diagram of the remote terminal control unit shown in FIG.
8 is a flowchart illustrating a method of evaluating the remote safety of a marine wind power generation structure according to an embodiment of the present invention.
9 is a diagram illustrating a remote safety assessment system for an offshore wind power structure according to an embodiment of the present invention implemented on a remote terminal.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the term "part" or the like, as described in the specification, means a unit for processing at least one function or operation, and may be implemented by hardware, software, or a combination of hardware and software.

[Remote safety evaluation system of offshore wind power structure]

FIG. 3 is a schematic view for explaining the principle of a remote safety evaluation system of an offshore wind power generation structure according to an embodiment of the present invention. FIG. 4 is a view for explaining a remote safety degree evaluation of a offshore wind power generation structure according to an embodiment of the present invention. 5 is a view illustrating a field terminal installed on a first offshore wind power generation structure in a remote safety degree evaluation system of a offshore wind power structure according to an embodiment of the present invention; FIG.

Referring to FIG. 3, the system for evaluating remote safety of an offshore wind power structure according to an exemplary embodiment of the present invention includes a plurality of offshore wind power generating structures 100a, 100b, and 100n, a field terminal 200, 300, and acceleration sensors 110, 120, and 130 are installed on the offshore wind power generating structures 100a, 100b, and 100n, respectively.

The acceleration sensors 110, 120, and 130 are installed in each of the plurality of offshore wind power generating structures 100 to measure an acceleration corresponding to each of the offshore wind power generating structures 100. Here, in the case of the remote safety evaluation system of the offshore wind power structure according to the embodiment of the present invention, instead of the sensor of the moving coil type for expensive vibration speed measurement, It is possible to determine whether or not the offshore wind power generation structure is vibrated.

The field terminal 200 remotely transmits the acceleration signals measured by the acceleration sensors 110, 120, and 130 in a wired or wireless manner.

The remote terminal 300 converts the acceleration signal transmitted from the field terminal 200 into a displacement and compares the acceleration signal with a preset reference displacement and calculates an error of the offshore wind power generating structures 100a, 100b, 100n 100b and 100n to determine the abnormality of each of the offshore wind power generating structures 100a, 100b, 100n as a secondary or a tertiary determination data of the offshore wind power generating structures 100a, 100b, 100n, And evaluates the safety of the offshore wind power generating structures 100a, 100b, and 100n.

That is, the system for evaluating the remote safety of the offshore wind power structure according to the embodiment of the present invention is characterized in that an acceleration sensor 110, 120, 130 installed on each of the offshore wind power generating structures 100a, 100b, The safety of the lower support structure depending on whether the power generation structures 100a, 100b, 100n are vibrated can be easily determined from a remote place.

Referring to FIG. 4, the offshore wind power generation structure includes a foundation and a support structure. The support structure includes a concrete caisson type, a mono type a pile type, a jacket type, a tripod type, and a floating type. At this time, a plurality of acceleration sensors 110a, 110b, and 110c may be installed in the lower structure, the tower, and the nacelle, respectively. That is, a plurality of acceleration sensors 110a, 110b, and 110c may be installed in one offshore wind power generation structure .

The offshore wind power generation structure may include, for example, a tower 101, a nacelle 102, a blade 103, a mono-file 104, and a transition piece 105. The nacelle 102 installed on the tower 101 is provided with a pitch system, a hub, a main shaft, a gear box, a high-speed shaft, a generator, (Yaw) system and the like.

The thickness of the steel pipe in the tower 101 is, for example, a steel pipe having a diameter of 25 to 40 mm. Such a steel tower 101 is fabricated and manufactured in a wind turbine manufacturing company, and its own weight is small, which is advantageous for an earthquake.

In the remote safety evaluation system of a offshore wind power structure according to an embodiment of the present invention, the on-site terminal 200 includes a plurality of offshore wind power generating structures 100a, 100b and 100n, The other offshore wind power generating structures 100b and 100n may be installed on the offshore wind power generating structure 100a and may be connected to the on-site terminal 200 in a wired or wireless manner with the acceleration measured by the respective acceleration sensors 1120 and 130 And the field terminal 200 collects field data of the plurality of offshore wind power generating structures 100a, 100b and 100n respectively and transmits the acceleration signal measured by the acceleration sensors 110, 120 and 130 Together they can be remotely wired or wireless.

In addition, the field terminal 200 can collect field data, which are external force data of waves, algae, wind and earthquakes that affect each of the offshore wind power generating structures 100a, 100b and 100n, It is possible to more accurately determine whether or not the power generation structures 100a, 100b, and 100n are abnormal, particularly, the abnormality of the lower support structure.

Meanwhile, FIG. 6 is a block diagram of a system for evaluating the remote safety of an offshore wind power structure according to an embodiment of the present invention, and FIG. 7 is a detailed configuration diagram of the remote terminal control unit shown in FIG.

Referring to FIG. 6, a remote safety rating system for an offshore wind power structure according to an embodiment of the present invention includes an offshore wind power generation structure 100, a field terminal 200, and a remote terminal 300, The wind power generation structure 100 includes a plurality of offshore wind power generating structures 100a, 100b, ..., 100n and each of the offshore wind power generating structures 100a, 100b, ..., 100n includes at least one acceleration sensor 110, 120, and 130 are installed. Here, the offshore wind power generation structure may be selected from concrete caisson type, mono-pile type, jacket type, tripod type, and floating type. And the upper structure of the towers and the nacelle may be installed on any one of the lower structures.

The acceleration sensors 110, 120, and 130 are installed in a plurality of offshore wind power generating structures 100 each composed of a lower structure, a tower, and a nacelle, so that the vibration of each of the offshore wind power generating structures 100a, 100b, Is measured.

The field terminal 200 collects the field data of the plurality of offshore wind power generating structures 100a, 100b, ..., 100n and transmits the generated acceleration data to the field terminal 200 in a wired or wireless manner together with the acceleration signals measured by the acceleration sensors 110, Remote transmission. The on-site terminal 200 is installed in any one of a plurality of offshore wind power generating structures 100a, 100b, ..., 100n, and the on-site terminal 200 includes the offshore wind power generating structures 100a, 100b, 100n to collectively transmit the collected data to the remote terminal 300. [

The field terminal 200 includes a field data collecting unit 210, a receiving and amplifying unit 220, an A / D converter 230, a field terminal control unit 240, and a transceiver 250. . Also, although not shown, the field terminal 200 may include an input unit, a display, a DB, and the like provided in the remote terminal 300.

The field data collection unit 210 of the field terminal 200 receives signals from the sensors installed in the offshore wind power generating structures 100a, 100b, ..., 100n to generate the offshore wind power generating structures 100a, 100b, ..., And external forces data of waves, birds, wind, and earthquakes affecting the earthquake.

The receiving and amplifying unit 220 of the field terminal 200 receives and amplifies the analog acceleration signal measured by the acceleration sensors 110, 120 and 130.

The A / D converter 230 of the field terminal 200 converts the amplified analog acceleration signal into a digital signal.

The field terminal control unit 240 of the field terminal 200 transmits the field data collected by the field data collecting unit 210 and the acceleration data digitally converted by the A / .

The transceiver 250 of the field terminal 200 transmits the data processed by the field terminal controller 240 to the remote terminal 300 by wire or wirelessly.

Referring to FIG. 6 again, the remote terminal 300 converts the acceleration signal transmitted from the field terminal 200 into a displacement, compares the acceleration signal with a predetermined reference displacement, and calculates the displacement of the offshore wind power generating structure 100a 100b and 100n are compared with each other to compare primary determination data of each of the offshore wind power generating structures 100a, 100b, ..., 100n to determine whether the offshore wind power generating structures 100a, 100b,..., 100n are secondarily determined to remotely evaluate the safety of the offshore wind power generating structures 100a, 100b, ..., 100n. At this time, the remote terminal 300 combines the primary determination result and the secondary determination result to determine an individual safety degree of the offshore wind power generating structures 100a, 100b, ..., 100n, The overall safety of the wind power generating structures 100a, 100b, ..., 100n can be evaluated individually.

Also, the remote terminal 300 can communicate with the field terminal 200 to receive data transmitted from the field terminal 200, and display and store the received data as numerical data and graphic data by a data analysis algorithm . In the embodiment of the present invention, the remote terminal 300 converts a vibration acceleration signal, which is a sensor output signal, into a vibration velocity and a displacement signal, but this operation may be performed in the field terminal 200.

6, the remote terminal 300 includes a transceiver 310, an A / D converter 320, an input unit 330, a remote terminal control unit 340, a display 350, and a DB 360).

The transceiver 310 of the remote terminal 300 plays a role of exchanging data with the transceiver 250 of the field terminal 200. For example, And receives the acceleration signal and the field data from the field terminal 200 in response to the vibration of the vehicle.

The A / D converter 320 of the remote terminal 300 converts the received acceleration signal and the field data into digital signals, respectively.

The input unit 330 of the remote terminal 300 is for inputting data necessary for the operation of the remote terminal controller 340. For example, when the remote terminal 300 operator selects a function, And various function keys for controlling information transmission through a communication port.

The remote terminal control unit 340 of the remote terminal 300 converts the acceleration signal into displacement and compares the acceleration signal with a preset reference value to remotely evaluate the safety of the offshore wind power generating structures 100a, 100b, ..., 100n.

The display 350 of the remote terminal 300 outputs safety evaluation data of the offshore wind power structures 100a, 100b, ..., 100n output from the remote terminal controller 340 on the screen, The measurement information analysis data is displayed numerically or graphically through the acceleration signal of the acceleration sensors 110, 120 and 130 under the control of the remote terminal control unit 340, the converted speed and displacement signal, and the data analysis algorithm, A control operation state and the like can be displayed.

The database 360 of the remote terminal 300 stores data input to the remote terminal control unit 340 and data processed by the remote terminal control unit 340. For example, Stores the analyzed data as well as the algorithm for analyzing the data and the control algorithm information of the remote terminal control unit 340, as well as the data analyzed by the algorithm.

7, the remote terminal control unit 340 includes an acceleration-displacement conversion unit 341, a reference value setting unit 342, a displacement comparison unit 343, a structure abnormality determination unit 344, A data comparison unit 345 and a structural safety degree determination unit 346. [

The acceleration-displacement converter 341 of the remote terminal controller 340 integrates the received acceleration signal and converts it into a displacement. Here, the technique of integrating the acceleration signal and converting it into displacement will be described later.

The reference value setting unit 342 of the remote terminal control unit 340 resets the displacement reference value according to the field data.

The displacement comparator 343 of the remote terminal controller 340 compares the displacement converted by the acceleration-displacement converter 341 with the displacement reference value reset by the reference value setting unit 342.

The structure abnormality determination unit 344 of the remote terminal control unit 340 primarily determines whether the offshore wind power generation structures 100a, 100b, ..., 100n are abnormal based on the displacement comparison result. The structure abnormality determiner 344 may previously set a reference value based on the finite element structure analysis for the offshore wind power generation structure 100. Since the finite element structure analysis is obvious to those skilled in the art, .

The inter-structure data comparison unit 345 of the remote terminal control unit 340 compares the data of each of the offshore wind power generating structures 100a, 100b, ..., 100n with the data of the offshore wind power generating structures 100a, 100b, 100n is abnormally determined.

The structure safety degree determination unit 346 of the remote terminal control unit 340 determines whether the result of the primary determination by the structure abnormality determination unit 344 and the result of the secondary determination by the interstructure data comparison unit 345 100b, ..., 100n are combined to evaluate the safety of each of the offshore wind power generating structures 100a, 100b, ..., 100n. At this time, the structure safety determination unit 346 may generate an alarm when it is determined that an abnormality has occurred in the offshore wind power generating structures 100a, 100b, ..., 100n.

According to the remote safety evaluation system of the offshore wind power generation structure according to the embodiment of the present invention, by using the acceleration sensor provided in each of the plurality of offshore wind power generation structures, Or whether the entire offshore wind power generation structure is abnormal can be easily determined. As a result, follow-up measures can be taken on offshore wind power structures where safety concerns have arisen.

[Evaluation method of remote safety of offshore wind power structure]

8 is a flowchart illustrating a method of evaluating the remote safety of a marine wind power generation structure according to an embodiment of the present invention.

6 and 8, a method for evaluating the remote safety of offshore wind turbine structures according to an embodiment of the present invention is to evaluate the safety of a plurality of offshore wind turbine structures 100 including a lower structure, a tower and a nacelle, As a method of evaluating, first, the field data of each offshore wind power generation structure 100a, 100b, ..., 100n is collected (S110). The offshore wind power generating structures 100a, 100b, ..., 100n may be constructed of a concrete caisson type, a mono-pile type, a jacket type, a tripod type, A float type, and a float type, and an upper structure of towers and nacelles is installed on any one of the floating structures.

Next, the acceleration sensors 110, 120, and 130 installed in the respective offshore wind power generating structures 100a, 100b, ..., 100n detect the acceleration corresponding to the vibrations of the offshore wind power generating structures 100a, 100b, ..., (S120).

Next, the measured acceleration signals are amplified and A / D-converted, respectively (S130).

Next, the field terminal 200 collects measured data from each of the offshore wind power generating structures 100a, 100b, ..., 100n and transmits the collected data to the remote terminal 300 by wire or wirelessly (S140). The on-site terminal 200 is installed in any one of a plurality of offshore wind power generating structures 100a, 100b, ..., 100n and the on-site terminal 200 includes the offshore wind power generating structures 100a, 100b, 100n to collectively transmit the collected data to the remote terminal 300. [

Next, the remote terminal control unit 340 in the remote terminal 300 integrates and converts the transmitted acceleration into displacement (S150).

Specifically, an algorithm for converting an acceleration signal applied to an embodiment of the present invention into a velocity and a displacement signal will be described. That is, in the embodiment of the present invention, the acceleration can be measured at the position where the dynamic displacement of the offshore wind power generation structure is measured, and the displacement can be calculated using the following signal processing technique.

First, if the measured acceleration signal is a (t), the velocity component is expressed by the following Equation 1 by performing integration in the time domain.

When the equation (1) is integrated, the displacement component x (t) is given by the following equation (2).

When the term based on the acceleration signal measured in the displacement component of Equation (2) is distinguished from the term based on the initial condition, the estimated displacement is represented by the following Equation (3) The displacement response can be obtained by integrating only the measured acceleration signals as shown in Equations 4 and 5.

Next, if the frequency domain integral is obtained by the Fourier transform of the measured acceleration signal, it can be displayed separately by the Fourier sine transform and the Fourier cosine transform as shown in the following equation (6).

Next, in order to obtain the displacement response from the Fourier transform of the measured acceleration signal, the following differential equation of the equation (7) and the equation (8) is introduced and substituted into the equation (6) As shown in Fig.

이고,

로 주어지며, 이에 따라 변위 x(t)는 다음의 수학식 11과 같이 주어진다.here,

ego,

And the displacement x (t) is given by the following equation (11).

Next, the displacement reference value is reset according to the field data, and the reset displacement reference value is compared with the acceleration displacement displacement (S160).

Next, it is first determined whether the offshore wind power generation structures 100a, 100b, ..., 100n are abnormal according to the result of the displacement comparison (S170). At this time, the reference value can be set based on the finite element structure analysis for the offshore wind power generation structure 100 in advance.

Next, the data of the offshore wind power generating structures 100a, 100b, ..., 100n are compared with each other to determine whether the offshore wind power generating structures 100a, 100b, ..., .

Next, the degree of safety of each of the offshore wind power generating structures 100a, 100b, ..., 100n is evaluated by combining the primary determination result and the secondary determination result (S190). At this time, the remote terminal 300 combines the primary determination result and the secondary determination result to determine an individual safety degree of the offshore wind power generating structures 100a, 100b, ..., 100n, The overall safety of the wind power generating structures 100a, 100b, ..., 100n can be evaluated individually. In addition, an alarm may be generated when it is determined that an abnormality has occurred in the offshore wind power generating structures 100a, 100b, ..., 100n.

9 is a diagram illustrating an implementation of a remote safety rating system of a offshore wind power structure according to an embodiment of the present invention on a remote terminal.

The remote safety rating system of the offshore wind power structure according to the embodiment of the present invention can be implemented on a remote terminal and the remote safety rating system of the offshore wind power structure can be implemented on the remote terminal, . That is, for example, the remote terminal 300 of the offshore wind power structure according to the embodiment of the present invention is implemented as a PC, is output to the screen corresponding to the display 350, It also indicates that the processed data is stored.

According to the remote safety evaluation system of the offshore wind power generation structure according to the embodiment of the present invention, by using the acceleration sensor installed on each of the offshore wind power generation structures, the safety of the lower support structure depending on the vibration of the offshore wind power generation structure can be easily And it is possible to easily judge whether any one of the offshore wind power generating structures is abnormal by comparing and determining the abnormality of each of the offshore wind power generation structures by using the acceleration sensors respectively installed on the plurality of offshore wind power generating structures have. In addition, it is possible to more accurately determine whether an offshore wind power generation structure is abnormal, taking into consideration the external force data of waves, algae, wind, and earthquakes affecting each offshore wind power generation structure.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: offshore wind power structure
100a: First offshore wind power structure
100b: Second offshore wind power structure
100n: No. N offshore wind power structure
200: field terminal
300: remote terminal
110: first acceleration sensor
120: second acceleration sensor
130: Nth acceleration sensor
210: Field data collection unit
220: receiving and amplifying unit
230: A / D converter
240: field terminal controller
250: Transceiver (field terminal)
310: Transceiver (remote terminal)
320: A / D converter
330: Input section
340: remote terminal controller
350: Display
360: Database (DB)
341: Acceleration-displacement converter
342: Reference value setting section
343:
344: Structure abnormality judging unit
345: Structural data comparison unit
346: Structure Safety Judgment Unit

Claims (15)

An acceleration sensor (110, 120, 130) installed in each of a plurality of offshore wind power generating structures (100) each composed of a substructure, a tower and a nacelle, for measuring an acceleration corresponding to a vibration of each of the offshore wind power generating structures (100);
A field terminal (200) for collecting field data of the plurality of offshore wind power generating structures (100) and remotely transmitting the measured data together with acceleration signals measured by the acceleration sensors (110, 120, 130); And
The acceleration signal transmitted from the field terminal 200 is converted into a displacement and is compared with a predetermined reference displacement to primarily determine whether the offshore wind power generating structure 100 is abnormal according to the displacement comparison result, A remote control system for remotely evaluating the safety of the offshore wind power generation structure (100) by determining the abnormality of each of the offshore wind power generation structures (100) by comparing the first judgment data of each of the wind power generation structures A terminal 300,
The remote terminal 300 may combine the primary determination result and the secondary determination result to determine the individual safety degree of the offshore wind power generating structures 100 and the total safety degree of the offshore wind power generating structures 100 Each of the safety assessments,
The acceleration sensors 110a, 110b and 110c are installed in a plurality of offshore wind power generating structures 100a, 100b and 100n so that the acceleration sensors 110, 120 and 130 are respectively installed in a lower structure, a tower and a nacelle, Field data that are external force data of waves, algae, wind, and earthquakes that affect each of the power generation structures 100a, 100b, and 100n can be collected. Thus, abnormality of the lower support structure of the offshore wind power generation structures 100a, 100b, So that it can be determined more accurately,
The field terminal 200 collects external force data of waves, algae, wind and earthquakes that affect each of the offshore wind power generating structures 100 from the sensors installed in the offshore wind power generating structure 100 A field data collecting unit 210; A receiving and amplifying unit 220 receiving and amplifying the analog acceleration signal measured by the acceleration sensors 110, 120 and 130; An A / D converter 230 for converting the amplified analog acceleration signal into a digital signal; A field terminal controller 240 for converting the field data collected by the field data collector 210 and the acceleration signal digitally converted by the A / D converter 230 into serial data so as to be remotely transmitted; And a transceiver (250) for transmitting data processed by the field terminal control unit (240) to the remote terminal (300) by wire or wireless,
The remote terminal (300)
A transceiver (310) for receiving the acceleration signal and the site data from the field terminal (200) in response to the vibration of the offshore wind power generator structure (100); An A / D converter 320 for converting the received acceleration signal and the field data into a digital signal, a controller 320 for converting the acceleration signal into a displacement and comparing the acceleration signal with a preset reference value, And an output unit 330 for inputting data necessary for the operation of the remote terminal control unit 340. The remote control unit 340 is connected to the remote terminal control unit 340, A display 350 for outputting evaluation data to a screen; And a database (DB) for storing data input to the remote terminal control unit 340 and data processed by the remote terminal control unit 340,
The remote terminal control unit 340,
An acceleration-displacement conversion unit (341) for integrating the received acceleration signal and converting it into a displacement; A reference value setting unit 342 for resetting the displacement reference value according to the field data; A displacement comparison unit 343 for comparing the displacement converted by the acceleration-displacement conversion unit 341 with the displacement reference value reset by the reference value setting unit 342; And a structure abnormality determination unit for determining the abnormality of the offshore wind power generation structure 100 in advance based on a finite element structure analysis for the offshore wind power generation structure 100 and determining a reference value based on the comparison result, 344); An inter-structure data comparing unit 345 for comparing the data of each of the offshore wind power generating structures 100 with each other to determine whether the off-axis wind power generating structure 100 is abnormal; And the reliability of each of the offshore wind power generating structures 100 by combining the results primarily determined by the structure abnormality determiner 344 and the results determined by the inter-structure data comparator 345 And a structural safety degree judging unit (346) for evaluating the safety of the offshore wind power generating structure. delete delete delete delete delete delete The on-site terminal (200) according to claim 1, wherein the field terminal (200) is installed in any one of a plurality of offshore wind power generating structures (100) To the remote terminal (300), and transmits the collected information to the remote terminal (300) in a batch. The method according to claim 1,
The offshore wind power generation structure may be any one selected from a concrete caisson type, a mono-pile type, a jacket type, a tripod type, and a floating type. Wherein the wind turbine is a offshore wind power structure having tower and nacelle superstructures installed on one substructure. delete delete delete delete delete delete

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