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Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Shanghai Jiao Tong University (1006-2467) is the property of Journal of Shanghai Jiao Tong University Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Zhejiang Electric Power is the property of Zhejiang Electric Power Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Zhejiang Electric Power is the property of Zhejiang Electric Power Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Railway Construction Technology is the property of Railway Construction Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Power Generation Technology is the property of Power Generation Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The foundation scouring problem of offshore wind farms endangers the overall structural durability and safety. A numerical simulation study was conducted on the scouring problem of the four-cylinder foundation of an offshore wind turbine. The SST-k棕 turbulence model was used to simulate the flow dynamics, the Exner equation was used to simulate the motion of the water-sediment interface, and the immersed boundary method were used to simulate the coupling effect of water and sediment. The accuracy and feasibility of the calculation method were verified using a single pile scouring example. For the four-cylinder foundation scouring problem of wind turbines, the foundation scouring problem at flow incidence of 0毅and 45毅inflow was studied. The simulation results show that the scour depths can be observed on each of the four-cylinders' foundation, and that the vortex field from the upstream cylinder may cause further scour phenomenon on the downstream cylinder foundation. [ABSTRACT FROM AUTHOR]

Copyright of Zhejiang Electric Power is the property of Zhejiang Electric Power Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Railway Construction Technology is the property of Railway Construction Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Due to the great height of suction jackets for offshore wind power foundations and poor sea conditions at the construction site, it is difficult for installation personnel to fix lifting hooks at great height and the risk is high for their safety. At present, there is no mature experience for reference, which brings great challenges to site construction. A set of intelligent sling and rigging system was innovatively developed for lifting and installation of suction jackets for Project C of Changle Offshore Wind Farm, which makes full use of information technology such as wireless communication, the Internet of Things to effectively solve the difficulty in positioning and aligning of the suction jacket and slings at high altitude and the safety of personnel working at heights, A total of 41 suction jackets were installed with the intelligent sling and rigging system, which proved to be technologically advanced with stable and reliable performance, and has great promotion value, conducive to promoting the technological progress of the offshore wind power industry. [ABSTRACT FROM AUTHOR]

Copyright of Advances in New & Renewable Energy is the property of Editorial Office of Advances in New & Renewable Energy and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Zhejiang Electric Power is the property of Zhejiang Electric Power Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Power Generation Technology is the property of Power Generation Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Power Generation Technology is the property of Power Generation Technology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

With the large number of offshore wind farms put into operation in China, the adoption of reasonable and effective foundation scour protection measures has an important impact on the safety and stability of wind turbine structure. The in-situ sludge solidification protection scheme and construction technology for scour protection of monopile foundation were studied and proposed based on an offshore wind farm with silt sediment. The laboratory tests of silt with different moisture content and different amount of curing agent were carried out. And the in-situ sludge solidification field trials for scour protection were completed by using two schemes of "curing before pile driving" and "pile driving before curing". The strength test of solidified soil samples taken on site and the scanning test of the scour protection effect around the foundation show that the implementation of in-situ sludge solidification for monopile foundation scour protection of offshore wind turbines is effective. [ABSTRACT FROM AUTHOR]

Copyright of Plateau Meteorology is the property of Plateau Meteorology Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Dalian University of Technology / Dalian Ligong Daxue Xuebao is the property of Journal of Dalian University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Advances in New & Renewable Energy is the property of Editorial Office of Advances in New & Renewable Energy and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Hydrographic Surveying & Charting / Haiyang Cehui is the property of Hydrographic Surveying & Charting Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The monopile foundation, as the main form of offshore wind turbine foundation in China, still needs to rely on the bottom-founded gripper for construction in the next few years. Bottom-founded gripper vertically placed on board during transportation without wind ropecan effectively reduce the difficulties during its load-in and load-out at sea, but it brings great challenges to its structural design and securing design and lashing design. Based on the construction project of an offshore wind farm in Guangdong, China, a series of technical problems which are involved in the transportation of the offshore wind monopile bottom-founded gripper vertically placed on board were discussed, including the seaworthiness of transportation vessel, the calculation of induced acceleration of transportation vessel, the calculation of the securing and lashing, the strength analysis of bottom-founded gripper, and the local strength analysis of securing components. The analysis results reveal that the stability of the transportation can be satisfied since the deadweight of the gripper is small, and the structural strength of the securing and lashing structure can be satisfied. Though the gripper structure is soft, the frequency corresponding to its first mode is far from the wave frequency, and the structure integrity of the gripper and the supporting brackets can be maintained during transportation. [ABSTRACT FROM AUTHOR]

Copyright of Electric Power Automation Equipment / Dianli Zidonghua Shebei is the property of Electric Power Automation Equipment Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Large diameter monopile is the main foundation type of offshore wind farm at present, and its transportation is mainly carried out by barge. Relying on Jiangsu Rudong No.H14 wind farm, the research on floating transportation construction technology of large diameter monopile has been carried out and successfully applied, which reduces the configuration of construction ship and machinery, reduces the cost, and has good application and promotion value. [ABSTRACT FROM AUTHOR]

In the process of offshore wind power construction, the axis verticality control of a single pile is a difficult and important point in the construction process. Therefore, higher requirements are put forward for the factory inspection of super large diameter steel pipe piles. Based on 3D visual inspection technology, a set of quality inspection system of super-large diameter steel pipe piles was developed, and the steel pipe pile point cloud data was acquired quickly by 3D Lidar ranging method. The data will be denoised and stitched in the system to generate 3D real scene model of the steel pile. The system can quickly obtain the quality data of steel pipe piles through the slice analysis of the model. The actual engineering has verified that the system has accurate detection results, high detection efficiency, and good promotion value. [ABSTRACT FROM AUTHOR]

Copyright of Tunnel Construction / Suidao Jianshe (Zhong-Yingwen Ban) is the property of Tunnel Construction Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Mechanical Engineering is the property of Editorial Board of China Mechanical Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Large diameter rock -socketed monopile construction of offshore wind power is difficult, risky and there is no practical experience for reference, which brings great test and challenge to the construction. In F Area of offshore wind farm project in Putian, Fujian, a pioneering drilling technology with dual casing was developed, it efficiency solved a serial of problems such as easy hole collapse, difficult casing recovery, and poor efficiency, etc. Through the operation of multiple machine positions, it is proved that the construction process is reasonable and feasible, which is conducive to the promotion and development of the industry. [ABSTRACT FROM AUTHOR]

In this paper, we put forward an general scheme of automatic construction equipment for underwater anti-corrosion repair of steel pipe piles with coating method, carried out a specific research on the automatic coating process of anti-corrosion materials, and designed and studied the key technologies of its executive mechanism. It is of great significance to solve the problems of corrosion of underwater steel pipe piles in docks, bridges and offshore wind farms, difficulties in later maintenance and inspection, and high repair costs. [ABSTRACT FROM AUTHOR]

In this paper, the formation of wind wave, swell and mixed wave in open seas were summarized, and the reason why mixed wave often appears in the form of bimodal spectrum in open sea area was discussed. The bimodal spectrum was represented by the summation of low frequency swell and high frequency wind wave. Combined with the motion response data of a pile driving vessel, the heave motion response of a pile driving vessel excited by the single low frequency swell, single high frequency wind wave, and mixed wave was investigated. The calculation results reveal that the low frequency swell which is not prominent in the bimodal spectrum mixed wave is the main source of exciting the pile driving vessel to move violently. It should be taken seriously when making decisions for offshore wind farm construction. [ABSTRACT FROM AUTHOR]

Wind and waves are important factors affecting the safety of the wind power supporting structure of offshore wind farms. In order to determine the design waves of an offshore wind farm in Rudong, the atmospheric model WRF were adopted to simulate the process of tropical storm and joint CCMP wind field data set as a drive wind field, by which the SWAN model was used to simulate the wave process in the sea area of Rudong wind farm in the past 20 years. The wind speed and wave elements in different return periods were obtained. The results show that the combination of WRF simulated tropical storm results and CCMP wind field can obtain more accurate wind field and more reasonable calculated wave results. [ABSTRACT FROM AUTHOR]

Copyright of Hydrographic Surveying & Charting / Haiyang Cehui is the property of Hydrographic Surveying & Charting Editorial Board and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

With the development of offshore wind power construction to deep water, the sea and wind conditions will become more severe, and the seabed geology will become more complex. At present, the foundation pile construction of offshore deepwater wind farms mainly relies on jack-up wind power installation ship, but the current domestic market is in short supply of such equipment and the operation cost is expensive. To solve this problem, a set of deep-water jacket fan foundation installation platform was designed and the construction method was complied. The installation platform can be well applied to deep-water soft foundations and rock foundations. This installation platform has the advantages of reasonable design, simple structure, convenient use, safe and reliable construction method, low cost, high efficiency, and wide range of use. It provides a better choice for the construction of jacket foundation piles in deep water wind farms. [ABSTRACT FROM AUTHOR]

Taking the crane vessel Sanhang Gong 5 as an example, combined with the environmental conditions of a certain nearshore wind farm, the technical problems involved in the construction and the whole process of the on-bottom setting of the crane vessel without relevant classification symbols were analyzed. The anchoring positioning and on-bottom stability were calculated. The wave current load was calculated by empirical formula and the wave force was calculated by using the frequency domain boundary element method. The calculation results show that under the condition of silt bottom material, the Sanhang Gong 5 needs to dive or float under the condition of velocity of flow less than 1.3 m/s to avoid anchor moving, in order to satisfy the on-bottom stability requirements, the initial amount of ballast water extra should be4500 t, and then reduced to 2500 t. [ABSTRACT FROM AUTHOR]

Based on the second phase project of Fuqing Xinghua Bay offshore wind power plant, the research and application of key construction technology of inclined pile rock-socketed for offshore wind power steel pipe pile were carried out. Through the development of a new technology of inclined pile rock-socketed construction of steel pipe piles, the integral steel platform for rock-socketed construction of jacket and the bit hob with high-efficiency rock breaking ability were developed, the rocksocketed construction was completed with high-quality, standard and high-efficiency under the condition of cost control. It is of great value to the inclined pile rock-socketed construction of offshore wind power steel pipe pile. [ABSTRACT FROM AUTHOR]

The single pile foundations of offshore wind power are widely used due to their advantages of factory production and high offshore construction efficiency, while the installation of wind turbines on single pile foundations is mainly split installation. Based on Guohua Dongtai Offshore Wind Power, we carried out research on the overall installation technology for single pile foundation wind turbines of offshore wind power, and implemented the integral installation of single pile foundation wind turbines. The formation of the single pile foundation wind turbine integrated installation technology has enriched China's offshore wind power installation and construction technology and has broad application prospects. [ABSTRACT FROM AUTHOR]

In order to investigate and reduce spray drift during the use of plant protection unmanned aerial vehicles (UAV), a spray unit consisting of a single rotor and a nozzle was simulated under the controlled wind tunnel conditions (wind speed 5 m/s, spray pressure 0.3 MPa and rotor speed 2 300 r/min). The effects of 11 kinds of nozzles and 4 different adjuvants on droplet drift were investigated. The drift potential index (DIX) and drift potential reduction percentage (DPRP) were also evaluated and compared. The results show that under the condition of 20℃/RH 80%, the drift distribution of different nozzle types in vertical plane and horizontal distance showed a regular change trend. Compared with the reference nozzle F110-03, the order of the drift potential of nozzles from large to small was TR80-0067 > ST110-0067 > XR110-01 > ST110-015 > TR80-01 > ST110-02 > XR110-03 > F110-03 > IDK series. The effect of IDK120-01and IDK120-015 was similar and they were the best ones. Under the wind tunnel condition of 30℃/RH 40% and wind speed of 5 m/s, compared to the control group without adjuvants, the mean drift reduction rates of spray nozzle XR 110-01 with adjuvant of 0.5% Silwet DRS-60, 1.0% "Maifei" (MF) and 1.0% Y-20079 were 43.3%, 15.6% and 5.2%, respectively. The selection of drift reducing adjuvants needs to consider the type of adjuvants and their effects. At the wind tunnel conditions of 20℃/RH 40%, 20℃/RH 80%, 30℃/RH 40% and 30℃/RH 60%, the spray nozzle XR110-01 added with 1.0% MF adjuvant was beneficial to the reduction of airborn drift. Especially, under high temperature and low humidity conditions, it had better drift reduction effect. This study has provided reference and guidance for nozzles selection, adjuvants selection and the field application of UAV for plant protection, and also data basis for the further study of the drift reduction technology of nozzle and adjuvants. [ABSTRACT FROM AUTHOR]

The construction of pile foundation and wind turbine installation in intertidal wind power plant must adopt different ship machinery and construction technology according to local hydrogeological conditions. Taking a project as an example, the hydrogeological data of intertidal wind farms were analyzed, and the feasibility of transforming semi-submersible barge into special vessel for wind turbine installation was analyzed. The force analysis and stability checks of the special intertidal wind farm construction vessel group transformed by semi-submersible barge were carried out. Combined with the experience of installation and construction of intertidal wind turbines, the technical points and safety measures for wind turbine installation during the construction of special vessel were discussed. The risk of equipment shaking caused by floating and collision during the lifting process was avoided, the feasibility of wind turbine installation method on the semi-submersible bottom was proved. It can provide a reference for the engineering practice of intertidal wind power construction. [ABSTRACT FROM AUTHOR]

In recent years, offshore wind power has developed rapidly, and the installed capacity has expanded rapidly, and gradually developed into deep sea. However, at present, there is still a large proportion of wind power stations in the intertidal zone along the coast from north of Shanghai to Shandong, which requires the construction of ships waiting for tide and sitting on beaches. The traffic is inconvenient, the safety risk is high, and the management of safety process is difficult. Through the identification of safety risks in the construction process of offshore wind farms in intertidal zone and the analysis of possible safety accidents or potential hazards, the corresponding safety control measures are given, and the safety management points in the main procedures of the main projects, such as the dismantling and installation of stable pile platform, the construction of single pile sinking, the separate installation of wind turbines, ar analyzed, which provides reference for the safety management of similar wind power construction in intertidal zone in the future. [ABSTRACT FROM AUTHOR]

Copyright of China Sciencepaper is the property of China Sciencepaper and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Aiming at development trend of wind power industry and research status of grid integration of offshore wind farms, a review was given on the key technologies of offshore wind power for grid integration and latest development. First of all, influences of offshore wind power injection to safe and stable operation of power grid was analyzed systematically. Firstly, grid dispatching, voltage control and frequency regulation will be influenced. Secondly, power flow distribution will be changed. Thirdly, power quality will be effected. In order to solve these problems, some key technologies for grid integration of offshore wind power were studied in recent years, such as low voltage ride through, ramp rate control, flexible direct current transmission based on voltage source converter, reactive power compensation, automatic output power adjustment and on-line monitoring and fault diagnosis. The results indicate that offshore wind power is the main development direction of the wind power industry in the future, and grid integration is a high effective way for its large-scale exploitation and utilization. Finally, some research focus and research directions about grid integration of offshore wind power have been put forward. [ABSTRACT FROM AUTHOR]

The wind field in Dalian area is simulated at a high spacial resolution of 3 km by using meso-scale atmospheric model MM5. The 1°±1° reanalytical data which is from National Centers for Environmental Prediction of America is used in this study and the computational period covers the whole year 2000. The model is validated by comparing the numerical results with the field observed data from three meteorological stations. The output data are further processed and the contour maps of yearly average wind speed, yearly power density and yearly effective hours are obtained. The distribution of offshore wind energy resources in Dalian area is analyzed. The test results show that the offshore wind energy resource in Dalian area is rich and has great value for development. [ABSTRACT FROM AUTHOR]