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| 1 | Optimized design of collector topology for offshore wind farm based on ant colony optimization with multiple travelling salesman problem显示文摘A layout of the offshore wind farm(OSWF)plays a vital role in its capital cost of installation. One of the major contributions in the installation cost is electrical collector system(ECS). ECS includes: submarine cables,number of wind turbines(WTs), offshore platforms etc. By considering the above mentioned problem having an optimized design of OSWF provides the better feasibility in terms of economic considerations. This paper explains the methodology for optimized designing of ECS. The proposed methodology is based on combined elitist ant colony optimization and multiple travelling salesman problem.The objective is to minimize the length of submarine cable connected between WTs and to minimize the wake loss in the wind farm in order to reduce the cost of cable and cable power loss. The methodology is applied on North Hoyle and Horns Rev OSWFs connected with 30 and 80 WTs respectively and the results are presented. | Ramu SRIKAKULAPU Vinatha U | 2018 | Journal of Modern Power Systems and Clean Energy2018，6，6： | 7 |
| 2 | Performance of the Wind Farm Parameterization Scheme Coupled with the Weather Research and Forecasting Model under Multiple Resolution Regimes for Simulating an Onshore Wind Farm显示文摘We use the Wind Farm Parameterization(WFP) scheme coupled with the Weather Research and Forecasting model under multiple resolution regimes to simulate turbulent wake dynamics generated by a real onshore wind farm and their influence at the local meteorological scale. The model outputs are compared with earlier modeling and observation studies. It is found that higher vertical and horizontal resolutions have great impacts on the simulated wake flow dynamics. The corresponding wind speed deficit and turbulent kinetic energy results match well with previous studies. In addition, the effect of horizontal resolution on near-surface meteorology is significantly higher than that of vertical resolution. The wake flow field extends from the start of the wind farm to downstream within 10 km, where the wind speed deficit may exceed 4%. For a height of 150 m or at a distance of about 25 km downstream, the wind speed deficit is around 2%. This indicates that, at a distance of more than 25 km downstream, the impact of the wind turbines can be ignored. Analysis of near-surface meteorology indicates a night and early morning warming near the surface, and increase in near-surface water vapor mixing ratio with decreasing surface sensible and latent heat fluxes. During daytime, a slight cooling near the surface and decrease in the near-surface water vapor mixing ratio with increasing surface sensible and latent heat fluxes is noticed over the wind farm area. | Rajabu J.MANGARA Zhenhai GUO Shuanglin LI | 2019 | Advances in Atmospheric Sciences2019，36，2： | 5 |
| 3 | Operation of offshore wind farms connected with DRU-HVDC transmission systems with special consideration of faults显示文摘The diode rectifier unit(DRU)-based high-voltage DC(DRU-HVDC) system is a promising solution for offshore wind energy transmission thanks to its compact design, high efficiency, and strong reliability. Herein we investigate the feasibility of the DRU-HVDC system considering onshore and offshore AC grid faults, DC cable faults, and internal DRU faults. To ensure safe operation during the faults, the wind turbine(WT) converters are designed to operate in either current-limiting or voltage-limiting mode to limit potential excessive overcurrent or overvoltage. Strategies for providing fault currents using WT converters during offshore AC faults to enable offshore overcurrent and differential fault protection are investigated. The DRU-HVDC system is robust against various faults, and it can automatically restore power transmission after fault isolation. Simulation results confirm the system performance under various fault conditions. | Rui Li Lujie Yu Lie Xu | 2018 | Global Energy Interconnection2018，1，5： | 4 |
| 4 | Fault analysis method of integrated high voltage direct current transmission lines for onshore wind farm显示文摘Voltage source converter(VSC) based high voltage direct current(HVDC) transmission is most suited for the wind farm as it allows flexibility for reactive power control in multi-terminal transmission lines and transmits low power over smaller distance. In this work, a new method has been proposed to detect the fault, identify the section of faults and classify the pole of the fault in DC transmission lines fed from onshore wind farm. In the proposed scheme, voltage signal from rectifier end terminal is extracted with sampling frequency of 1 k Hz given as the input to the detection, classification and section discrimi-nation module. In this work, severe AC faults are also considered for section discrimination. Proposed method uses fuzzy inference system(FIS) to carry out all relaying task. The reach setting of the relay is 99.9% of the transmission line. Besides, the protection covers and discriminates the grounding fault with fault resistance up to 300 Ω.Considering the results of the proposed method, it can beused effectively in real power network. | Shobha AGARWAL Aleena SWETAPADMA Chinmoy PANIGRAHI Abhijit DASGUPTA | 2019 | Journal of Modern Power Systems and Clean Energy2019，7，3： | 2 |
| 5 | Transfer function based equivalent modeling method for wind farm显示文摘To effectively study the dynamics of power systems with large-scale wind farms(WFs), an equivalent model needs to be developed. It is well known that back-toback converters and their controllers are important for the dynamic responses of the wind turbine(WT) under disturbances. However, the detailed structure and parameters of the back-to-back converters and their controllers are usually unknown to power grid operators. Hence, it is difficult to build an accurate equivalent model for the WF using the component model-based equivalent modeling method. In this paper, a transfer function based equivalent modeling method for the WF is proposed. During modeling, the detailed structure and parameters of the WF are not required. The objective of the method is reproducing the output dynamics of the WF under the variation of the wind speed and power grid faults. A decoupled parameter-estimation strategy is also developed to estimate the parameters of the equivalent model. A WF that consists of 16 WTs is used to test the proposed equivalent model. Additionally,the proposed equivalent modeling method is applied to build the equivalent model for a real WF in Northwest China. The effectiveness of the proposed method is validated by the real measurement data. | Feng WU Junxia QIAN Ping JU Xiaoping ZHANG Yuqing JIN Dan XU Michael STERLING | 2019 | Journal of Modern Power Systems and Clean Energy2019，7，3： | 2 |
| 6 | Tianrun Xia County phase III 99.5 MW wind power engineering technology and green innovation显示文摘Located in Xia County, Yuncheng City, Shanxi Province, Tianrun Sijiao Town Wind Farm will have a total installed capacity of 250 MW as the Project planned. The 99.5 MW installed capacity of the Third Phase Project is developed by Xia County Tianrun Wind Power Co., Ltd. This project belongs to the fifth batch of wind power projects of Shanxi Province in the 'Twelfth Five-Year Plan' Period approved by the National Development and Reform Commission (as shown in Fig. 1). The Project started on July 17, 2017, since its inverse feeding on July 22, 2018, it has been operating safely and steadily according to the power grid dispatching regulations. | Xiaobo WANG | 2019 | Frontiers of Engineering Management2019，6，1： | 0 |
| 7 | Achievements and Prospects of Wind Power Prediction显示文摘Wind power prediction is crucial to the operation of the power system accommodating a large amount of wind power. From the perspective of power dispatch, this paper discusses the current situations of the technology, system building, prediction errors, the index for evaluating wind power prediction system and the main bodies responsible for the prediction. It delves into the existing problems such as incomplete basic data, poor prediction accuracy, short prediction time scale, as well as lacking of prediction in most wind farms. Suggestions on improvement are proposed including enhancing the construction of wind power prediction system on both the grid side and the wind farm side, speeding up the development of ultra-short term wind power prediction system, deepening the research on wind power prediction technology, strengthening the construction of technical standard system and carrying out cross-sector cooperation. | Fan Gaofeng, Pei Zheyi, Xin Yaozhong National Power Dispatching & Communication Center Han Ruiguo | 2011 | Electricity2011，22，5： | 0 |
| 8 | Network-based optimization techniques for wind farm location decisions显示文摘This study aims to find appropriate locations for wind farms that can maximize the overall energy output while controlling the effects of wind speed variability.High wind speeds are required to obtain the maximum possible power output of a wind farm. However, balancing the wind energy supplies over time by selecting diverse locations is necessary. These issues are addressed using network-based models. Hence, actual wind speed data are utilized to demonstrate the advantages of the proposed approach. | Jorge Ignacio CISNEROS-SALDANA Seyedmohammadhossein HOSSEINIAN Sergiy BUTENKO | 2018 | Frontiers of Engineering Management2018，5，4： | 0 |
| 9 | Wind Advantage显示文摘Leo Carolus is a lucky young man in Luderitz Town of Karas in south west Namibia as he has a stable job near his home.“Thanks to the Ombepo Wind Farm, I can now work so close to my home, which was previously unimaginable for me,” he said. Up on the mountain not far from his home, three wind turbines developed and installed by China s Hunan-based XEMC Windpower Co. Ltd. have been operating for two years, which Carolus can see even from his home. | Wei Hongchen | 2019 | ChinAfrica2019，11，7： | 0 |
| 10 | Effect of Wind Farm and Thyristor Switched Series Capacitors on a Faulty Network显示文摘Controlling voltage and active or reactive losses are one of the most important issues in each power grid.In this paper,the influence of wind farm and thyristors switched capacitors on the network are considered.TSSC and Wind turbines are one of the significant components of each network.These instruments are also one of the resources of producing active and reactive power.In this study,wind farm and TSSC are already located optimally by Genetic algorithm.This network studied when a fault considered in one of buses.So that,in first step none of wind farm and TSSC are in the power grid.In the second step,both wind farm and TSSC are connected while a short circuit accrues in one of the busses or lines of the network.At the end,it will be observed that using thyristor switched capacitors and wind farm influence the network.So that,the capacity of producing the reactive and active power will be increased and totally the loss of the system will be decreased.Furthermore,the voltage profile will be in a suitable range. | Milad Gheydi Sajad Bagheri | 2019 | Electrical Science & Engineering2019，1，1： | 0 |
| 11 | Options and Opportunities for Energy Management in Malaysian Grid Systems-Putrajaya as a Case Study显示文摘This paper presents an opportunity for energy management with an integrated photovoltaic and wind farm for the energy and economic aspects of the commercial area located in Putrajaya. The energy economy accession conforming to the wind speed, temperature, solar irradiation, and energy consumption on a daily basis is taken into consideration. Design analysis is done through the industry standard numerical tool. From the result analysis, the recommended ratio of renewable share minimizing stress to the electric grid is proposed. According to the solutions obtained from the numerical design tool, photovoltaic is recommended to be more energy efficient and economically viable in comparison of the fully crowded wind farm. From the proposed solutions, the photovoltaic is able to provide 51% of the energy consumed and it costs RM 0.365 per kW/h. | Aravind CV Umashankar Subramaniam MD Shahrukh Adnan Khan Md. Ibrahim Ibne Alam | 2018 | Journal of Electronic Science and Technology2018，16，4： | 0 |
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