{"title":"Experimental investigation and analysis for gearbox fault","authors":"Shaohua Li, D. Jiang, M. Zhao","doi":"10.1109/WNWEC.2010.5673173","DOIUrl":"https://doi.org/10.1109/WNWEC.2010.5673173","url":null,"abstract":"As an important component of a wind turbine drive chain, the high failure rate of the gearbox can have a serious impact on the operation of wind turbine units. The fault diagnosis of the gearbox is therefore important for the safety of wind turbine units. In this paper, a gearbox experiment rig was built, experiments on the gear surface spalling fault were held on the rig under laboratory conditions, the shaft vibration displacement signals were collected, related vibration signals were analyzed by time domain, amplitude domain, frequency domain and wavelet analysis, and the results of different analysis methods were compared. The results show that the waveform of normal and fault signals are similar, the amplitude of the signals will change while the fault happens, and the wavelet analysis is more effective than frequency domain analysis on gearbox fault features extraction.","PeriodicalId":171339,"journal":{"name":"2010 World Non-Grid-Connected Wind Power and Energy Conference","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121817513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The UAE wind turbine performance prediction using wind tunnel airfoil data","authors":"Chenkai Zhang, Jun Hu","doi":"10.1109/WNWEC.2010.5673181","DOIUrl":"https://doi.org/10.1109/WNWEC.2010.5673181","url":null,"abstract":"It's vitally important for wind turbine aerodynamic performance predictions to design and optimize wind turbines. In view of the BEM method's fast speed and widespread use, this paper applies WT_Perf software of NREL to predict the performance on a NREL Phase VI upwind wind turbine. Measurements from the Phase VI of the NREL/NASA Ames wind tunnel test were used for validating the predictions. Performance predictions will vary greatly when data selection changes. Also three-dimensional rotational stall delay should be accounted for in the predictions. The final obtained prediction methods show good agreement with the experiments. Because of their accuracy and straightforward manufacturing, derived methods can be widely used in wind turbine optimization and design of the future research.","PeriodicalId":171339,"journal":{"name":"2010 World Non-Grid-Connected Wind Power and Energy Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127216113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Monitoring and diagnosis system for wind power generation based on ad-hoc networks","authors":"Qiang Gao, S. Shen, T. Wang","doi":"10.1109/WNWEC.2010.5673111","DOIUrl":"https://doi.org/10.1109/WNWEC.2010.5673111","url":null,"abstract":"On-line monitoring and diagnosis of wind power generation is not easy because of its discrete distribution. In this paper, a new monitoring and diagnosis system for this problem is presented, which is based on ad-hoc networks. The reliability and maintenance is improved dramatically and some special functions for components failure alert are also added. Finally, a small ad-hoc network for simulation of wind power generation monitoring and diagnosis is fabricated in the laboratory, and a special routing algorithm is designed. The experiments show that the monitoring and diagnosis of wind power generation based on ad-hoc networks is practical and can be used in reality.","PeriodicalId":171339,"journal":{"name":"2010 World Non-Grid-Connected Wind Power and Energy Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129150490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of the addition of ZrO2 on the liquidus temperature of nNaF·AlF3-Al2O3 molten salt system","authors":"Morigengaowa Bao, Zhaowen Wang, B. Gao, Zhongning Shi, Xianwei Hu, Yaxin Yu","doi":"10.1109/WNWEC.2010.5673274","DOIUrl":"https://doi.org/10.1109/WNWEC.2010.5673274","url":null,"abstract":"In this paper, the liquidus temperature of nNaF·AlF<inf>3</inf>-Al<inf>2</inf>O<inf>3</inf>-ZrO<inf>2</inf> molten salt system was determined by thermal analysis method. The effects of molar ratio of NaF and AlF<inf>3</inf>, and ZrO<inf>2</inf> concentration on the liquidus temperature were studied by orthogonal regression experimental design method. The results show that the trends of liquidus temperatures of melts with five different molar ratios of NaF and AlF<inf>3</inf> are similar when ZrO<inf>2</inf> is added in the melts. The liquidus temperature at a certain molar ratio of NaF and AlF<inf>3</inf> is decreased effectively while ZrO<inf>2</inf> in a mass fraction range of 0∼2% is added. However, when the mass fraction of ZrO<inf>2</inf> is more than 2%, it has little effect. Therefore, it is thought that the optimum mass fraction of ZrO<inf>2</inf> addition is 2%. At last, the following equation is obtained by quadratic regression: T = 920.2–16n −1.36w<inf>(ZrO2)</inf>–1.8n • w<inf>(ZrO2)</inf> +15n<sup>2</sup> +0.58 w<inf>(ZrO2)</inf><sup>2</sup>, where T is the liquidus temperature; CR is molar ratio of NaF and AlF<inf>3</inf>; w<inf>(ZrO2)</inf> is the weight percentage of ZrO<inf>2</inf>.","PeriodicalId":171339,"journal":{"name":"2010 World Non-Grid-Connected Wind Power and Energy Conference","volume":"83 7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128758021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The current state, problems and development strategies of the wind power industry in the three northeast provinces of China","authors":"Qiang Zhang","doi":"10.1109/WNWEC.2010.5673254","DOIUrl":"https://doi.org/10.1109/WNWEC.2010.5673254","url":null,"abstract":"The northeast region of China is an important industrial base and an area with abundant wind energy resources. Therefore, it holds an important strategic position in both exploitation and utilization of wind energy resources and wind power industry development in China. This article assessed the wind resource reserves in the northeast region and their exploitable value, and analyzed the current state and problems of the wind power industry. The research shows that the wind power industry in the northeast region is developing rapidly and even speeding like a swarm of bees in recent years. In addition, the scale of existing wind farms is very small, and lack overall planning. As a result, the wind power generation capacity is idle, causing a huge waste of resources and funds. To solve these problems, this article proposes the following development goals and suggestions to the wind power industry in the northeast region, according to the prediction. (1) Strengthen overall planning for wind power industry development in the northeast region, and avoid pell-mell development; (2) Make scientific predictions and decisions, and set feasible targets and plans for the wind power industry; (3) Insist on technical innovation as a core to solve technical bottleneck problems of grid wind power, and adopt the policy of “walking on two legs”, i.e. develop both grid and non-grid wind power; (3) local governments should make a financial subsidy policy, lower the price of wind power, help enterprises solve the problem of grid wind power in order to avoid idle wind power and wasting of funds, to promote development of the wind power industry in the northeast region of China.","PeriodicalId":171339,"journal":{"name":"2010 World Non-Grid-Connected Wind Power and Energy Conference","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114754419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Key technologies analysis of small scale non-grid-connected wind turbines: A review","authors":"Wei Liang, Weiguo Liu","doi":"10.1109/WNWEC.2010.5673189","DOIUrl":"https://doi.org/10.1109/WNWEC.2010.5673189","url":null,"abstract":"The aim of this paper is to review the key technologies of current used small-scale non-grid-connected wind turbines and highlight future developments of both technologies and application. First, the key technologies are divided into four main parts: mechanical structure, generator, converter system and control system. The international developments and the latest technologies are presented from the view of the four main parts. Next, this paper analyzes the four main parts of the key technologies in detail. The characteristics of HAWT, VAWT and HVAWT, choosing and designing of a generator, the AC-DC rectifier and DC-DC chopper circuits in the converter system and the MPPT based laws used in the control system are thoroughly discussed in this paper. Then, the application of a small-scale non-grid-connected wind turbines is introduced. The three main ways are roof top, stand alone and built-in. Meanwhile, the concept of the renewable hybrid energy system which consists of a wind energy system, a PV solar system and a diesel generator is proposed. The four parts of the current research results are presented: novel power electronics technologies, advanced simulation software, automatic controller and deep cycle battery bank.","PeriodicalId":171339,"journal":{"name":"2010 World Non-Grid-Connected Wind Power and Energy Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133440597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Research on integrated system of non-grid-connected wind power and water-electrolytic hydrogen production","authors":"Zhuoyong Yan, W. Gu","doi":"10.1109/WNWEC.2010.5673278","DOIUrl":"https://doi.org/10.1109/WNWEC.2010.5673278","url":null,"abstract":"China has abundant wind energy resources. The total installed capacity of wind power has doubled every year in the past five consecutive years. By the end of 2009, the total installed capacity of wind power reached 26000 MW. However, there are over 9880 MW wind turbines that are not connected to the grid because of peak shaving restraint. Hydrogen has been recognized as the most promising future energy carrier. Currently, industrial hydrogen production processes are not being created out of traditional energy resources, which could easily cause secondary pollution. In this paper, based on research of wind power characteristics and water electrolytic techniques, the integrated system of non-grid-connected wind power and water-electrolytic hydrogen production is designed. At the independent supply of simulation wind power or the wind/grid complementary power supply, the hydrogen equipment all works properly; the large-scale change of current density has little impact on hydrogen-producing efficiency, current efficiency and gas quality, and only affects gas output, which indicates the coupling mechanism between wind power and water-electrolytic hydrogen production. The new system can save a large number of auxiliary equipment for wind power grid connection, increase the utilization rate of wind power, and break through the development bottlenecks of wind power, which will explore a diversified development method of large-scale wind power, creating hundred billions (Yuan) of the emerging strategic industry, and contributing to the development of green economy and low carbon economy in China.","PeriodicalId":171339,"journal":{"name":"2010 World Non-Grid-Connected Wind Power and Energy Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132699246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Gao, Dan Li, Xianwei Hu, Zhongning Shi, Zhaowen Wang
{"title":"Phase composition and its impacts on bath ratio determination of aluminum electrolyte with additives of KF and NaCl","authors":"B. Gao, Dan Li, Xianwei Hu, Zhongning Shi, Zhaowen Wang","doi":"10.1109/WNWEC.2010.5673300","DOIUrl":"https://doi.org/10.1109/WNWEC.2010.5673300","url":null,"abstract":"Phases of aluminum electrolytes with additives of NaCl and KF were investigated. The definition and determination of the cryolite ratio of bath were discussed based on the results of phase composition. The deduced cryolite ratio equation was justified by fluorideion selective electrode analysis (FISEA). Experimental results show that FISEA has good performance with high accuracy and reproducibility for an aluminum bath containing NaCl and KF.","PeriodicalId":171339,"journal":{"name":"2010 World Non-Grid-Connected Wind Power and Energy Conference","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124704346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Application of fiber-reinforced composites in wind turbine blades","authors":"Jin Xu, Zhenqian Lu","doi":"10.1109/WNWEC.2010.5673165","DOIUrl":"https://doi.org/10.1109/WNWEC.2010.5673165","url":null,"abstract":"Wind turbine blades are the key components in the wind power generation system. Fiber-reinforced composites in wind turbine blades are widely used in the development of large-scale wind turbines. The advantages of fiber-reinforced composites and the characteristic of reinforced fibers are introduced. The structure of fiber aggregation is enumerated and their advantages and disadvantages are analyzed. The development of wind turbine blades is presented.","PeriodicalId":171339,"journal":{"name":"2010 World Non-Grid-Connected Wind Power and Energy Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127938347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Prospects and status of non-grid-connected wind power all over the world","authors":"Anil S. Kane","doi":"10.1109/WNWEC.2010.5673222","DOIUrl":"https://doi.org/10.1109/WNWEC.2010.5673222","url":null,"abstract":"People living in 35% of the landmass of the world have no electrical grid and they live mostly in darkness. These are the most appropriate cases for non-grid-connected wind power. Non-grid-connected wind power systems will combine with large-capacity energy storage system or high energy-loaded industries. There is a direct need to develop high capacity electrical energy storage system at cheap cost. Non-grid-connected wind power systems will be wide-spread and can meet the demand of the deprived world.","PeriodicalId":171339,"journal":{"name":"2010 World Non-Grid-Connected Wind Power and Energy Conference","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124225847","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}