Inner Mongolia Power Exploration and Design Institute

Hohhot, China

Inner Mongolia Power Exploration and Design Institute

Hohhot, China
SEARCH FILTERS
Time filter
Source Type

Peng H.,Inner Mongolia Power Exploration and Design Institute | Yang X.,Inner Mongolia Power Exploration and Design Institute | Feng C.,Inner Mongolia Power Exploration and Design Institute | Liu F.,Huazhong University of Science and Technology
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2012

Three methods were investigated to evaluate ten-month wind speed based on the two-month learning data of the neighboring masts, which located in two wind farms with different terrains in Inner Mongolia. The adopted strategies were linear correlation method, physical method and the support vector machine (SVM) method. The performance of three estimation methods were comprehensively compared. The calculated results show that the linear correlation method can yield the estimation results quickly, while the good spatial correlation between the two masts is required; the physical method performs excellently for the flat terrain, while its performance is poor for the complex terrain with the mean absolute percentage error (MAPE) of 15%; the SVM method functions well for the two wind farms with the MAPE less than 5%. Therefore, the SVM method is robust for the complex terrain and exceeds other two methods in a whole.


Gao Z.-Y.,Inner Mongolia University of Technology | Gao Z.-Y.,Inner Mongolia Autonomous Regions Renewable Energy Key Laboratory | Wang J.-W.,Inner Mongolia University of Technology | Wang J.-W.,Inner Mongolia Autonomous Regions Renewable Energy Key Laboratory | And 5 more authors.
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | Year: 2010

In wind tunnel opening, the instantaneous flow field in 1/3 circle around the rotor were measured by PIV under different tip speed ratio. As the tip speed ratio increases, the radial displacement of tip vortex increases, the radius of tip vortex inducible region increases, the radius of overall wake increases. At the same time, the axial velocity defect increases, and the axial displacement of tip vortex decreases. There was a stronger velocity gradient region around the rotor because of the interaction between tip vortex induce and rotor rotation, the vibration inspirited by inducible flow makes the tip vortex shedding from the blade fluctuating in wake, and the stronger fluctuations far away the rotor. By the locality average, the rule was found that the intersections connection of tip vortex trajectory and azimuth planes approximately is line, and its slope increase with the tip speed ratio.


Guangping Z.,Harbin Engineering University | Peixiu X.,Harbin Engineering University | Xuedong Z.,Inner Mongolia Power Exploration and Design Institute
Key Engineering Materials | Year: 2010

Realistic Failure Process Analysis (RFPA3D) was used to simulate the concrete-filled rectangular steel tube columns which are subjected to axial loads. The ultimate bearing capacity and the load-strain figures were presented. The Numerical simulation results were verified by experimental data of the paper [5]. Meanwhile, the development process of crack in the specimen was described. The whole failure process of rectangular steel tube columns was reproduced. The failure principles of concrete-filled rectangular steel tube column were discussed deeply. © (2010) Trans Tech Publications, Switzerland.


Li M.,Inner Mongolia University of Technology | Zhao M.,Inner Mongolia University of Technology | Ma L.,Inner Mongolia University of Technology | Duan Y.,Inner Mongolia Power Exploration and Design Institute | And 3 more authors.
Dianwang Jishu/Power System Technology | Year: 2011

A gate fire unit for voltage reinjection multilevel VSC converter with cascaded H bridges, which operates under the condition of high voltage and high capacity, is designed. During the design of fire unit, a lot of key problems to be paid attention to in practice, such as switching pattern selection, how to synchronize with power grid, edge state judgment and so on, are analyzed in detail, and the simulation that takes the application of the designed gate trigger unit in STATCOM as background is performed. Simulation results show that the designed gate fire unit based on reinjection multilevel converter possesses good steady-state response and dynamic response.


Peng H.,Huazhong University of Science and Technology | Peng H.,Inner Mongolia Power Exploration and Design Institute | Liu F.,Huazhong University of Science and Technology | Yang X.,Inner Mongolia Power Exploration and Design Institute
Renewable Energy | Year: 2013

Two different prediction methods are investigated for short term wind power prediction of a wind farm in this paper. The adopted strategies are individual artificial neural network (ANN) and hybrid strategy based on the physical and the statistical methods. The performance of two prediction methods is comprehensively compared. The calculated results show that the individual ANN prediction method can yield the prediction results quickly. The prediction accuracy is low and the root mean squared error (RMSE) is 10.67%. By contrast the hybrid prediction method operates costly and slowly. However, the prediction accuracy is high and the RMSE is 2.01%, less than 1/5 of that by individual ANN method. Meanwhile, it is found that the errors of the prediction have some relation with the wind speeds. The prediction errors are small when the wind speeds lower than 5 m/s or higher than 15 m/s. The reasons for such phenomena are also investigated. © 2012 Elsevier Ltd.


Li B.,North China Electrical Power University | Li J.,Technology Development Service Center | Zhang Q.,Technology Development Service Center | Kou J.,Inner Mongolia Power Exploration and Design Institute | And 5 more authors.
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | Year: 2012

Based on the technologies of fanjets and externally-fired gas turbines, a system coupled by a gas turbine and a boiler was proposed. In the new system, most of the air is driven by the front fan of the gas turbine and flows into a boiler as primary and secondary air of the boiler; and the air compressed by a compressor of the gas turbine flows into the high temperature heat exchanger (HTHE) installed in the furnace chamber to absorb the heat and to work through expanding in the turbine. At last, the air would flow into the chamber as secondary air when it is discharged from the turbine. The compressor and the front fan are driven by the turbine. The thermal model of the system was established. The results of calculation show that the technology of using a gas turbine to drive the fan of the boiler is feasible. The auxiliary power consumption rate will be reduced obviously, because primary and secondary air fans can be replaced by the proposed system. © 2012 Chin. Soc. for Elec. Eng.


Li J.,Technology Development Service Center | Li B.,North China Electrical Power University | Yao G.,Technology Development Service Center | Kou J.,Inner Mongolia Power Exploration and Design Institute | And 5 more authors.
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | Year: 2012

In order to improve the power supply efficiency of the thermal power plants, a system coupling of gas turbine and boiler was proposed, and a performance model of the coupled system was established. The prediction shows that the performance of the system is influenced significantly by the temperature of exhaust gas. At temperature of exhaust gas of 130°C, the thermal efficiency of the coupled system improves, and the coal consumption of the system reduces correspondingly. At certain maximum operating temperature of gas turbine, the ratio of the total air volume into the boiler and the air volume into gas turbine has an optimum value. The efficiency of the coupling system could improve more than 0.5% when the maximum operating temperature of gas turbine is 700°C, the increasing of power supply could be up to 4% at the same operating temperature of gas turbine. Taking into account of the unit thermal efficiency, cold end corrosion and the other factors, the best increasing of power supply is 1.64% by deleting the power consumption of fan. At same condition, the optimum ratio of the total air volume into boiler and the air volume into the gas turbine is about 4.29. © 2012 Chinese Society for Electrical Engineering.


Peng H.,Inner Mongolia Power Exploration and Design Institute | Liu F.,Huazhong University of Science and Technology | Yang X.,Inner Mongolia Power Exploration and Design Institute
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2011

Three different prediction models were investigated for short term wind speed prediction of a wind farm in this paper. The adopted prediction models are persistence method, artificial neural network (ANN) and support vector machine(SVM), respectively. The performance of three prediction models were compared. Four kinds of combined predictions of three model were evaluated as well. The calculated results show that the SVM method performs best among the individual prediction model and the combination of three forecasting methods exhibit the highest precision among the combined prediction strategies. Moreover, the forecasting accuracy of combined model is better than that of any individual prediction method. Meanwhile, it is found that the accuracy of combined prediction is improved apparently if the prediction errors between single methods have strong negative correlations; while the accuracy of combined prediction is improved limitedly if the prediction errors between single methods have strong positive correlations.


Peng H.,Inner Mongolia Power Exploration and Design Institute | Liu F.,Huazhong University of Science and Technology | Yang X.,Inner Mongolia Power Exploration and Design Institute
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2011

Two different prediction methods were investigated for short term wind power prediction of a wind farm in this paper. The adopted strategies were individual artificial neural network (ANN) and mixed ANN based on the physical method and the statistical method. The performance of two prediction methods were comprehensively compared. The calculated results show that the individual ANN prediction method can yield the prediction results quickly, the prediction accuracy is low and the root mean squared error (RMSE) is 10.67%; the mixed ANN prediction method operates costly and slowly, but the prediction accuracy is high and the RMSE is 2.01%, less than one fifth of that by individual ANN method. Meanwhile, it is found that the errors of the prediction have some relation with the wind speeds and the prediction errors are small when the wind speeds lower than 5 m/s or higher than 15 m/s. The reasons for such phenomena were also investigated.


Ren Y.,Inner Mongolia University of Technology | Cao L.,Inner Mongolia Power Exploration and Design Institute | Xu S.,Inner Mongolia University of Technology | Li J.,China Electric Power Research Institute | Li H.,Inner Mongolia University of Technology
Proceedings of 2010 International Conference on Intelligent Control and Information Processing, ICICIP 2010 | Year: 2010

Dynamic voltage restorer (DVR) is widely applied to industry because it can reduce the impact of voltage disturbance to sensitive loads. The three detecting methods to extracted distortion components of DVR based on Hilbert transform, wavelet transform, and the instantaneous reactive power theory produce are introduced in details, respectively. Comparisons of working performance among these difference detecting methods of DVR are applied to power quality disturbance analysis under various run conditions. The results show that the method of Hilbert transform doesn't detect distortion voltage of containing harmonic; the method of instantaneous reactive power theory can detect harmonic components, but doesn't detect distortion voltage of containing voltage sags; the method of wavelet transform has best detecting performance under different run conditions. Simulation results verify three detecting methods' applicability and effectiveness in DVR system. © 2010 IEEE.

Loading Inner Mongolia Power Exploration and Design Institute collaborators
Loading Inner Mongolia Power Exploration and Design Institute collaborators