Cui J.,Shenyang University of Technology |
Yang J.,Shenyang University of Technology |
Xing Z.,Shenyang University of Technology |
Li Y.,Shenyang University of Technology |
And 2 more authors.
Dianli Xitong Zidonghua/Automation of Electric Power Systems | Year: 2015
Due to the wind power time-varying and intermittent characteristics, it is difficult to achieve real time energy balance in a power system. Hence, accurate and stable power forecast will make wind energy a schedulable energy. To deal with wind power uncertainties, a multi-scenario power forecasting method based on the optimal fitting wind power curve for single turbine is proposed. Firstly, atmospheric movement model is discretized using computational fluid dynamics (CFD) speedup matrix, which can reflect wind flow distribution accurately. Secondly, a new variable-weight CFD wind forecast combination method for each wind turbine is put forward considering rotor thrust coefficient of free flow field and wakes of actuator disc. Finally, a new site-specific optimal power curve fitting method is developed based on historical data of wind speed and power measured by wind turbine's anemometers. The contribution rate is the basis of eliminating illegal points by use of iterative algorithm. The engineering applications show that the proposed method can effectively improve the accuracy of wind power curve fitting and forecasting. ©2015 Automation of Electric Power Systems Press Source
Li Z.,Dalian Huarui Heavy Industry Group Co. |
Chen Y.,CSIC Dalian Marine Information System Co.
2013 The International Conference on Technological Advances in Electrical, Electronics and Computer Engineering, TAEECE 2013 | Year: 2013
The computer technology has been applied widely on mechanical engineering design and project management. For wind power industry, the computer technology is always applied by computation and simulation on wind turbine gearbox design. The professional computer software tools can simulate the actual running situations of the gear rating and transmission of the gearbox before manufacturing and prototype testing. This paper proposes the relevant analysis regarding computer technology application on wind turbine gearbox design, and presents the essential auxiliary function of computer simulation of some particular software tools for gearbox operation, gear rating and transmission drive train on wind turbine gearbox design. © 2013 IEEE. Source
Lv L.,China Institute of Technology |
Song Y.T.,Dalian Huarui Heavy Industry Group Co. |
Zhang S.F.,Dalian Jiaotong University
Applied Mechanics and Materials | Year: 2014
The level of an enterprise's process management related to its existence and development tightly, in order to evaluate it accurately, the evaluation index system was presented, which was formed by 10 first level indexes and 39 second level indexes, in which the latter is the meticulous and materialization of the former. The methods of evaluation by total marks, weighting comprehensive evaluation on multi-index system and fuzzy comprehensive evaluation were applied to the process management. Compared with the other two ways, the fuzzy comprehensive evaluation is more accurate and comprehensive since it settle the quantification of the nature indexes during the analysis process, and it also solve the multi-factors evaluation who have different unit. © (2014) Trans Tech Publications, Switzerland. Source
Han Y.-L.,Shenyang University of Technology |
Ding J.,Shenyang University of Technology |
Liang Z.-Q.,Dalian Huarui Heavy Industry Group Co.
Shenyang Gongye Daxue Xuebao/Journal of Shenyang University of Technology | Year: 2013
In order to overcome the failure phenomenon of parts caused by friction and abrasion which often exists in industrial production process, the problem concerning the abrasion resistance of material surface was researched. Through adopting the lining-ceramic technology with redundant heat of molten steel, the ceramic compound powders were sintered on the surface of casting steel with the heat dissipated from molten steel, and the lining-ceramic layer with high abrasion resistance was formed. The results of abrasion experiments reveal that the weight loss rate of lining-ceramic layer is as 1/80 as that of 45# steel. The microstructure of the layer was analyzed with scanning electron microscope (SEM). It is found out that the ceramic particles homogenously distribute in the metal matrix, and are tightly clasped by the matrix metal. The analysis indicates that the ceramic particles can bear most loads in the friction process, and such microstructure feature is one of the important factors for the great improvement in abrasion resistance. Source
Wang X.-W.,China University of Mining and Technology |
Wei L.-B.,China University of Mining and Technology |
Sun D.-Q.,Dalian Huarui Heavy Industry Group Co.
Meitan Xuebao/Journal of the China Coal Society | Year: 2013
Established undamped mechanical model and mathematical model of horizontal vibrating centrifuge. The main vibration spring stiffness gets lower due to the temperature rise of bearing, which leads to amplitude-frequency characteristic curve change, shell and screen-basket amplitude instability. Found the fixed point on the screen-basket amplitude-frequency characteristic curve is not affected by the main vibration spring stiffness. Combined with the antiresonant frequency in the case of higher temperature of bearings, in order to stablize the amplitude of screen-basket and the minimum amplitude of shell and the less stress of the main vibration spring, and put forward that the system natural frequency of shell and vibration frequency is equal and slightly lower than natural frequency of the screen-basket, and verify such conclusion by experiments. Source