Shijingshan District, China
Shijingshan District, China

Time filter

Source Type

Feiyang H.,Beijing Jiaotong University | Jichao H.,Harbin University of Science and Technology | Weili L.,Beijing Jiaotong University | Xingfu Z.,Harbin University of Science and Technology | And 3 more authors.
IEEE Transactions on Energy Conversion | Year: 2013

A new kind of the copper shield structure called the empty solid copper shield structure (ESCSS) in the large turbogenerator is proposed in this paper. Based on the complex structure characteristics of a 330-MW water-hydrogen- hydrogen cooled turbogenerator, the flow network within a half of the generator is established, and the total flow rate, pressure, flow rates (boundary conditions) of the various ventilation ducts and the chambers in the generator are separately obtained after solving the equations of the flow network when the traditional copper shield structure and the ESCSS are adopted. The 3-D transient electromagnetic field of the generator end region is calculated by using the time-stepping FEM, and the electromagnetic loss distributions (heat sources) are determined separately. Then, the fluid and thermal analysis model for the whole end region is established. Through numerical calculating, the whole end region 3-D fluid and temperature distributions are obtained separately. The results show that the new copper shield structure makes the copper shield temperature much lower. Meanwhile, the copper shield material is saved. The obtained conclusions may provide useful reference for the optimal design and research of the large turbogenerator. © 1986-2012 IEEE.


Huo F.,Beijing Jiaotong University | Li W.,Beijing Jiaotong University | Wang L.,Harbin University of Science and Technology | Zhang Y.,Beijing Jiaotong University | And 2 more authors.
IEEE Transactions on Industrial Electronics | Year: 2014

Due to the complexity of the structures and magnetic field distribution in the end region of large turbogenerators, using a 330-MW water-hydrogen-hydrogen cooled turbogenerator as an example, the 3-D mathematical and geometry models of the nonlinear transient eddy current field were given. Taking the nonlinearity of the core material and the influences of noncontact between the copper screen and the clamping plate, as well as the shape of stator end windings into consideration, the 3-D transient electromagnetic field was calculated, and the losses of different metal parts were obtained by the finite-element method. The calculated power losses were applied to the thermal field as heat sources. Temperatures of the copper screen were gained. The calculated results of copper screen were well coincident with the test data. Hence, the calculated results are accurate, and the method of calculation is effective. © 1982-2012 IEEE.


Wang L.,Harbin University of Science and Technology | Huo F.,Beijing Jiaotong University | Li W.,Beijing Jiaotong University | Zhang Y.,Beijing Jiaotong University | And 3 more authors.
IEEE Transactions on Magnetics | Year: 2013

Since the structure of a large capacity turbogenerator is complex in the end region, accurate calculation about the leakage magnetic field becomes a key factor in the design. In this paper, a 330-MW level turbogenerator is electromagnetically analyzed and investigated with different metal screens in the end region. Its nonlinear transient electromagnetic field and eddy current loss were calculated by using the time step finite-element method (FEM). The influences of metal screen materials on the electromagnetic field and eddy current loss were compared and analyzed. All of these will contribute to the turbogenerator engineering design. Using the loss gained by the magnetic field calculation as a heat source, the thermal field of the end region with a copper screen was calculated. Compared with the test data, the calculated temperature results match well with the measured data. © 2012 IEEE.


Feiyang H.,Beijing Jiaotong University | Weili L.,Beijing Jiaotong University | Likun W.,Harbin University of Science and Technology | Chunwei G.,Harbin Institute of Technology | And 2 more authors.
IEEE Transactions on Industrial Electronics | Year: 2013

Aiming at the complexity of the structure in the end region of large turbogenerators, 3-D mathematical and physical models of nonlinear transient eddy current field are given by taking a 330-MW water-hydrogen-hydrogen-cooled turbogenerator for example. Both nonlinearity of B-H curve and noncontact structure between the copper screen and press plate, as well as the evolvent of stator end windings, were taken into consideration. When the copper screen thickness is different in the end region of the generator, 3-D transient electromagnetic field and losses of metal parts were calculated under no-load and rated-load conditions by finite-element method. The metal part losses, which were obtained from transient electromagnetic field, were applied to the thermal field as heat sources. Temperatures of copper screen were gained after the thermal field was calculated in the end region. The calculated results coincide well with the measured data. © 1982-2012 IEEE.


Han J.,Harbin University of Science and Technology | Li W.,Beijing Jiaotong University | Wang L.,Harbin University of Science and Technology | Zhou X.,Shanghai Institute of Technology | And 2 more authors.
IEEE Transactions on Industrial Electronics | Year: 2014

With increased turbogenerator capacity and electromagnetic load, overheating of the complex end parts has become one of the main problems affecting safe and stable turbogenerator operation. In this research, a flow network was built representing the structural and ventilation characteristics of a 330-MW turbogenerator. The fan inlet velocity and pressures (boundary conditions) of each end-region outlet were obtained by the flow network method. The 3-D transient electromagnetic field in the turbogenerator end was calculated, and the eddy current losses (heat sources) of the end parts were obtained by the finite-element method. To study the surface heat-transfer coefficient distribution on the stator-end winding surface, fluid and thermal mathematical and geometric models of the whole turbogenerator end region were given. Using the finite-volume method, the surface heat-transfer coefficient distribution on the complex 3-D stator-end winding surface, fluid-flow distribution, and temperature distribution of the end parts were investigated under rated-load conditions. The calculated temperature results match well with measured data. This research can provide a theoretical basis for calculating the heat-transfer coefficients of the outer surfaces of large turbogenerators. © 1982-2012 IEEE.


Li W.,Beijing Jiaotong University | Zhou X.,Harbin University of Science and Technology | Huo F.,Beijing Jiaotong University | Li Y.,Beijing BEIZHONG Steam Turbine Generator Co. | Han J.,Harbin University of Science and Technology
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | Year: 2013

According to the features of ventilation structure in 330 MW water-hydrogen-hydrogen cooled turbo-generator, the ventilation network model of half axial section was built, the total flow, the flow and the pressure of the ventilation ducts and the wind chambers were obtained with the fluid network method. To validate the accuracy of calculation with fluid network method, three-dimensional flow-heat transfer coupling model of end region was established. The flow velocity and the pressure from the ventilation system calculations were applied to the physical model of end region as boundary conditions, the distribution of the temperature on the copper shield was obtained with the finite volume method under rated operating conditions. Comparing the calculated temperature results with the test values, the errors meet the engineering requirement. Based on these, the change of temperature on the copper shield was analyzed by adjusting the flowing area of the ventilation duct between the copper shield and the press plate. All of the aforementioned will provide an effective basis for designing the structure of a large turbo-generator accurately. © 2013 Chinese Society for Electrical Engineering.


Weili L.,Beijing Jiaotong University | Jichao H.,Harbin University of Science and Technology | Feiyang H.,Beijing Jiaotong University | Xingfu Z.,Harbin University of Science and Technology | And 2 more authors.
IEEE Transactions on Energy Conversion | Year: 2013

Flow network was built according to the ventilation structural characteristics of a 330 MW large water-hydrogen-hydrogen cooled turbogenerator. The variation of the fan inlet velocities, and the flow rates and pressures (boundary conditions) of each end region outlet were obtained, respectively, with different air gap spacer heights and different shelter board widths between the long press fingers by flow network method, and the relative law was analyzed. In order to study the influence of the changed end ventilation structures on the temperature distribution of the end parts, 3-D transient electromagnetic field in the turbogenerator end was calculated, and the eddy current losses (heat sources) of the end parts were gained by the finite-element method. Meanwhile, the fluid and thermal mathematics and physical models of the end region were given. Using the finite-volume method, the influence of the changed end ventilation structures on the surface heat transfer coefficient and the temperature of end parts was researched. It shows that the proper changes in the air gap spacer height and shelter board width decrease the copper shield temperature and result in a reasonable temperature distribution in the end parts. It provides the useful reference for the further design of the large turbogenerators. © 1986-2012 IEEE.


Han J.,Harbin University of Science and Technology | Li W.,Beijing Jiaotong University | Li Y.,Beijing BEIZHONG Steam Turbine Generator Company
IEEE Transactions on Industrial Electronics | Year: 2015

Distribution of complex fluid flow is an important factor that affects the temperature distribution of the end parts in the end region of a turbogenerator. In this paper, a turbogenerator is considered as an example; the fluid flow velocity and pressure values obtained from flow network calculations are applied to the end region as boundary conditions, and the losses obtained from electromagnetic field calculations are applied to the end region as heat sources in a fluid and thermal coupling field. Furthermore, mathematical and geometric models of 3-D fluid and thermal coupling of the end region are established. The distributions of the complex fluid velocity and fluid temperature in the turbogenerator end region are investigated in detail. Moreover, the temperature distribution of the end parts is determined. Comparison of measurement results of the temperature of the end parts with the corresponding calculation results shows their good agreement. © 1982-2012 IEEE.


Weili L.,Beijing Jiaotong University | Jichao H.,Harbin University of Science and Technology | Xingfu Z.,Harbin University of Science and Technology | Yong L.,Beijing Beizhong Steam Turbine Generator Company
IEEE Transactions on Industrial Electronics | Year: 2013

According to the complex structure characteristics of a 330-MW water-hydrogen-hydrogen-cooled turbogenerator, the flow network within a half-axial segment of the generator was established. The total flow rate, pressure, flow rates of various ventilation ducts, and the chambers in the generator were obtained after solving the equations of the flow network. The 3-D transient electromagnetic field in the generator end was calculated, and the eddy-current losses of the end parts were gained. Using the finite volume method, the fluid and thermal mathematic and physical models for the whole end region were given. The flow velocity and the pressure values from the flow-network calculations were applied to the end region as boundary conditions, and the losses measured from electromagnetic field calculations were applied to the end parts as heat sources in the temperature field. Thus, both the distribution of the temperature of the end parts and the distribution of the fluid flow in the whole end region were obtained under rated operating conditions. Comparing the calculated temperature results with the test values, the errors meet the engineering requirement. All of the aforementioned data will provide an effective basis for accurately calculating the temperature of the end parts in a large turbogenerator. © 1982-2012 IEEE.


Li C.,Beijing BEIZHONG Steam Turbine Generator Co. | Ouyang L.,Beijing BEIZHONG Steam Turbine Generator Co.
Xitong Fangzhen Xuebao / Journal of System Simulation | Year: 2014

A 3D virtual prototype design platform was built for steam turbine based on multidisciplinary CAX tools by integrating tools and combing with the existing PLM management system. With the help of the platform, data in each R&D process of steam turbine could be inter-connected and transformed automatically, in the meanwhile multidisciplinary and multi-platform tools operated collaboratively. The platform enabled steam turbine structure design by CAD and virtual prototype simulation based on Inventor, combining with Nastran CAE multidisciplinary simulation, and the Vault platform as management tool of the 3D model and the CAE analysis data, combined with the existing PLM 2D drawing management system, and with an ERP enterprise resource system interface for R&D and manufacturing management.

Loading Beijing BEIZHONG Steam Turbine Generator Co. collaborators
Loading Beijing BEIZHONG Steam Turbine Generator Co. collaborators