The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
Weili Li - One of the best experts on this subject based on the ideXlab platform.
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Influence of Electric Shield Materials on Temperature Distribution in the End Region of a Large Water–Hydrogen–Hydrogen-Cooled Turbogenerator
IEEE Transactions on Industrial Electronics, 2020Co-Authors: Ping Zheng, Baojun Ge, Weili LiAbstract:To investigate the influence of different electric shield materials on the temperature distribution in the Turbogenerator end region, a 330-MW water-hydrogen-hydrogen-cooled Turbogenerator is considered in this paper. Mathematical and physical models of the three-dimensional (3-D) transient electromagnetic field in the Turbogenerator end region are established. The magnetic density distribution and the losses of end parts are obtained with different electric shield materials. The loss values obtained from the 3-D transient electromagnetic field calculations with different electric shield materials are applied to the end parts as heat sources. Pressure and fluid velocity values from flow network calculations are applied to the end region as boundary conditions for the fluid and thermal coupling analysis. In addition, a 3-D fluid and thermal coupling model of the Turbogenerator end region is established. The distributions of the surface heat transfer coefficient on the inner and outer surfaces of the electric shield are determined with different electric shield materials. Temperature distributions of the stator-end copper winding, finger plate, clamping plate, and electric shield in the Turbogenerator end region are investigated with different electric shield materials. The calculated temperature results for the electric shield are compared with measured values, and the calculated results agree well with the measured values.
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Influence of Magnetic Permeability of the Press Plate on the Loss and Temperature of the End Part in the End Region of a Turbogenerator
IEEE Transactions on Industrial Electronics, 2019Co-Authors: Baojun Ge, Weili LiAbstract:Press plates are widely used in the end region of Turbogenerators. However, due to the effect of magnetic field leakage from the end region, the eddy current losses of the copper screen and press plate will result in the copper screen and press plate having a high temperature under the rated load condition. In this paper, the influence of the magnetic permeability of the press plate on losses and temperature of the end region is researched in Turbogenerators. Three-dimensional (3-D) fluid and thermal mathematic and physical models of the Turbogenerator end region are established. Under different magnetic permeability values of the press plate, a 3-D transient electromagnetic field in the Turbogenerator end region is calculated, and the obtained losses of the end parts are treated as heat sources. Fluid network equations are calculated, and the obtained fluid velocity and pressure values are applied to the end region as boundary conditions. After solving the fluid and thermal equations, fluid velocity around the surface of the end parts is obtained under the rated load condition. The temperature distribution of the end parts is determined for different magnetic permeability values of the press plate. The calculated temperature results agree well with the test data.
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Calculation of Temperature Distribution in End Region of Large Turbogenerator Under Different Cooling Mediums
IEEE Transactions on Industrial Electronics, 2018Co-Authors: Baojun Ge, Weili LiAbstract:In order to study the influence of different cooling mediums on the fluid velocity and the temperature distribution of end parts in the Turbogenerator end region, a 330-MW Turbogenerator is analyzed. Three-dimensional fluid-thermal coupling analysis model of the Turbogenerator end region is given. When the different cooling mediums are used, fluid velocity of fan inlet and pressure values of end-region outlet from the flow network calculation are applied to the end region as boundary conditions, and the losses from 3-D transient electromagnetic field calculation are applied to the end parts as heat sources in the fluid-thermal coupling field. The fluid field and temperature field in the Turbogenerator end region are calculated using the hydrogen and air as cooling medium, respectively. Fluid velocity and temperature of end parts in the Turbogenerator end region are compared when the different cooling mediums are used. When the hydrogen is used as the cooling medium, comparing the calculated temperature results with the test values, the calculated temperature results match well with test values. These will provide a reference for the ventilation cooling design of large Turbogenerator.
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Numerical calculation of CHTC on end metal parts and flow in end region of a Turbogenerator
IET Science Measurement & Technology, 2018Co-Authors: Baojun Ge, Weili LiAbstract:The convection heat transfer coefficient (CHTC) distribution of surfaces of end metal parts directly affects the temperature distribution of end metal parts. In this study, a large Turbogenerator is analysed. To study the CHTC distribution of surfaces of end metal parts in detail, a three-dimensional (3D) fluid and thermal analysis model of whole Turbogenerator end region is established. The losses of end metal parts from 3D transient electromagnetic field calculation are provided to end metal parts as heat sources. Pressure values of end-region outlets and fluid velocity of fan outlet from flow network calculation are provided to end region as boundary conditions in the 3D fluid and thermal analysis model. CHTC distribution laws of the surfaces of the clamping plate, finger plate, and copper screen are studied in detail by the finite volume method. The fluid flow and temperature distribution of end metal parts are determined in the end region of the Turbogenerator. The calculated results are compared with measured data.
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erratum to influence of cooling fluid parameter on the fluid flow and end part temperature in end region of a large Turbogenerator
IEEE Transactions on Energy Conversion, 2016Co-Authors: Baojun Ge, Weili LiAbstract:In order to study the influence of the cooling fluid parameter on the fluid flow and end part temperature in the end region of the large Turbogenerator, a 330-MW water–hydrogen–hydrogen cooled Turbogenerator is analyzed. The fluid velocity and pressure values from the flow network calculations are applied to the end region as boundary conditions and the losses obtained from 3-D transient electromagnetic field calculations are applied to the end parts as heat sources in the fluid and thermal coupling analysis. After solving the fluid and thermal equations of fluid–solid conjugated heat transfer, the fluid velocity and end part temperature in the Turbogenerator end region are gained under the different cooling fluid parameters. The influence of different fluid velocities and fluid temperatures in the water pipe inlet, and in the fan inlet on the fluid flow and end part temperature in the Turbogenerator end region is researched. The calculation results of copper shield temperature are compared with the measured values. The calculation results coincident well with the measured values. These provide the important reference for better cooling Turbogenerator end region.
Yong Li - One of the best experts on this subject based on the ideXlab platform.
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Analysis of Three-Dimensional Complex Fluid Flow and Temperature Distribution in the End Region of a Turbogenerator
IEEE Transactions on Industrial Electronics, 2015Co-Authors: Weili Li, Yong LiAbstract: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.
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Calculation and Analysis of the Surface Heat-Transfer Coefficient and Temperature Fields on the Three-Dimensional Complex End Windings of a Large Turbogenerator
IEEE Transactions on Industrial Electronics, 2014Co-Authors: Weili Li, Likun Wang, Xingfu Zhou, Xiaochen Zhang, Yong LiAbstract: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.
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Numerical Calculation and Analysis of Three-Dimensional Transient Electromagnetic Field in the End Region of Large Water–Hydrogen–Hydrogen Cooled Turbogenerator
IEEE Transactions on Industrial Electronics, 2014Co-Authors: Weili Li, Likun Wang, Yihuang Zhang, Chunwei Guan, Yong LiAbstract: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.
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numerical calculation and analysis of three dimensional transient electromagnetic field in the end region of large water hydrogen hydrogen cooled Turbogenerator
IEEE Transactions on Industrial Electronics, 2014Co-Authors: Weili Li, Likun Wang, Yihuang Zhang, Chunwei Guan, Yong LiAbstract: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.
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Influence of Metal Screen Materials on 3-D Electromagnetic Field and Eddy Current Loss in the End Region of Turbogenerator
IEEE Transactions on Magnetics, 2013Co-Authors: Likun Wang, Weili Li, Yong Li, Yihuang Zhang, Qing Li, Chunwei GuanAbstract: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.
Baojun Ge - One of the best experts on this subject based on the ideXlab platform.
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Influence of Electric Shield Materials on Temperature Distribution in the End Region of a Large Water–Hydrogen–Hydrogen-Cooled Turbogenerator
IEEE Transactions on Industrial Electronics, 2020Co-Authors: Ping Zheng, Baojun Ge, Weili LiAbstract:To investigate the influence of different electric shield materials on the temperature distribution in the Turbogenerator end region, a 330-MW water-hydrogen-hydrogen-cooled Turbogenerator is considered in this paper. Mathematical and physical models of the three-dimensional (3-D) transient electromagnetic field in the Turbogenerator end region are established. The magnetic density distribution and the losses of end parts are obtained with different electric shield materials. The loss values obtained from the 3-D transient electromagnetic field calculations with different electric shield materials are applied to the end parts as heat sources. Pressure and fluid velocity values from flow network calculations are applied to the end region as boundary conditions for the fluid and thermal coupling analysis. In addition, a 3-D fluid and thermal coupling model of the Turbogenerator end region is established. The distributions of the surface heat transfer coefficient on the inner and outer surfaces of the electric shield are determined with different electric shield materials. Temperature distributions of the stator-end copper winding, finger plate, clamping plate, and electric shield in the Turbogenerator end region are investigated with different electric shield materials. The calculated temperature results for the electric shield are compared with measured values, and the calculated results agree well with the measured values.
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Influence of Magnetic Permeability of the Press Plate on the Loss and Temperature of the End Part in the End Region of a Turbogenerator
IEEE Transactions on Industrial Electronics, 2019Co-Authors: Baojun Ge, Weili LiAbstract:Press plates are widely used in the end region of Turbogenerators. However, due to the effect of magnetic field leakage from the end region, the eddy current losses of the copper screen and press plate will result in the copper screen and press plate having a high temperature under the rated load condition. In this paper, the influence of the magnetic permeability of the press plate on losses and temperature of the end region is researched in Turbogenerators. Three-dimensional (3-D) fluid and thermal mathematic and physical models of the Turbogenerator end region are established. Under different magnetic permeability values of the press plate, a 3-D transient electromagnetic field in the Turbogenerator end region is calculated, and the obtained losses of the end parts are treated as heat sources. Fluid network equations are calculated, and the obtained fluid velocity and pressure values are applied to the end region as boundary conditions. After solving the fluid and thermal equations, fluid velocity around the surface of the end parts is obtained under the rated load condition. The temperature distribution of the end parts is determined for different magnetic permeability values of the press plate. The calculated temperature results agree well with the test data.
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Calculation of Temperature Distribution in End Region of Large Turbogenerator Under Different Cooling Mediums
IEEE Transactions on Industrial Electronics, 2018Co-Authors: Baojun Ge, Weili LiAbstract:In order to study the influence of different cooling mediums on the fluid velocity and the temperature distribution of end parts in the Turbogenerator end region, a 330-MW Turbogenerator is analyzed. Three-dimensional fluid-thermal coupling analysis model of the Turbogenerator end region is given. When the different cooling mediums are used, fluid velocity of fan inlet and pressure values of end-region outlet from the flow network calculation are applied to the end region as boundary conditions, and the losses from 3-D transient electromagnetic field calculation are applied to the end parts as heat sources in the fluid-thermal coupling field. The fluid field and temperature field in the Turbogenerator end region are calculated using the hydrogen and air as cooling medium, respectively. Fluid velocity and temperature of end parts in the Turbogenerator end region are compared when the different cooling mediums are used. When the hydrogen is used as the cooling medium, comparing the calculated temperature results with the test values, the calculated temperature results match well with test values. These will provide a reference for the ventilation cooling design of large Turbogenerator.
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Numerical calculation of CHTC on end metal parts and flow in end region of a Turbogenerator
IET Science Measurement & Technology, 2018Co-Authors: Baojun Ge, Weili LiAbstract:The convection heat transfer coefficient (CHTC) distribution of surfaces of end metal parts directly affects the temperature distribution of end metal parts. In this study, a large Turbogenerator is analysed. To study the CHTC distribution of surfaces of end metal parts in detail, a three-dimensional (3D) fluid and thermal analysis model of whole Turbogenerator end region is established. The losses of end metal parts from 3D transient electromagnetic field calculation are provided to end metal parts as heat sources. Pressure values of end-region outlets and fluid velocity of fan outlet from flow network calculation are provided to end region as boundary conditions in the 3D fluid and thermal analysis model. CHTC distribution laws of the surfaces of the clamping plate, finger plate, and copper screen are studied in detail by the finite volume method. The fluid flow and temperature distribution of end metal parts are determined in the end region of the Turbogenerator. The calculated results are compared with measured data.
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erratum to influence of cooling fluid parameter on the fluid flow and end part temperature in end region of a large Turbogenerator
IEEE Transactions on Energy Conversion, 2016Co-Authors: Baojun Ge, Weili LiAbstract:In order to study the influence of the cooling fluid parameter on the fluid flow and end part temperature in the end region of the large Turbogenerator, a 330-MW water–hydrogen–hydrogen cooled Turbogenerator is analyzed. The fluid velocity and pressure values from the flow network calculations are applied to the end region as boundary conditions and the losses obtained from 3-D transient electromagnetic field calculations are applied to the end parts as heat sources in the fluid and thermal coupling analysis. After solving the fluid and thermal equations of fluid–solid conjugated heat transfer, the fluid velocity and end part temperature in the Turbogenerator end region are gained under the different cooling fluid parameters. The influence of different fluid velocities and fluid temperatures in the water pipe inlet, and in the fan inlet on the fluid flow and end part temperature in the Turbogenerator end region is researched. The calculation results of copper shield temperature are compared with the measured values. The calculation results coincident well with the measured values. These provide the important reference for better cooling Turbogenerator end region.
Li Yong - One of the best experts on this subject based on the ideXlab platform.
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influence of the end ventilation structure change on the temperature distribution in the end region of large water hydrogen hydrogen cooled Turbogenerator
IEEE Transactions on Energy Conversion, 2013Co-Authors: Li Weili, Han Jichao, Zhou Xingfu, Huo Feiyang, Zhang Yihuang, Li YongAbstract: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.
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Influence of the End Ventilation Structure Change on the Temperature Distribution in the End Region of Large Water–Hydrogen–Hydrogen Cooled Turbogenerator
Energy Conversion, IEEE Transactions on, 2013Co-Authors: Li Weili, Han Jichao, Zhou Xingfu, Huo Feiyang, Zhang Yihuang, Li YongAbstract: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.
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Influence of Copper Screen Thickness on Three-Dimensional Electromagnetic Field and Eddy Current Losses of Metal Parts in End Region of Large Water-Hydrogen–Hydrogen-Cooled Turbogenerator
IEEE Transactions on Industrial Electronics, 2013Co-Authors: Huo Feiyang, Li Weili, Zhang Yihuang, Wang Likun, Guan Chunwei, Li YongAbstract: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.
Li Weili - One of the best experts on this subject based on the ideXlab platform.
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influence of the end ventilation structure change on the temperature distribution in the end region of large water hydrogen hydrogen cooled Turbogenerator
IEEE Transactions on Energy Conversion, 2013Co-Authors: Li Weili, Han Jichao, Zhou Xingfu, Huo Feiyang, Zhang Yihuang, Li YongAbstract: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.
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Influence of the End Ventilation Structure Change on the Temperature Distribution in the End Region of Large Water–Hydrogen–Hydrogen Cooled Turbogenerator
Energy Conversion, IEEE Transactions on, 2013Co-Authors: Li Weili, Han Jichao, Zhou Xingfu, Huo Feiyang, Zhang Yihuang, Li YongAbstract: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.
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Influence of Copper Screen Thickness on Three-Dimensional Electromagnetic Field and Eddy Current Losses of Metal Parts in End Region of Large Water-Hydrogen–Hydrogen-Cooled Turbogenerator
IEEE Transactions on Industrial Electronics, 2013Co-Authors: Huo Feiyang, Li Weili, Zhang Yihuang, Wang Likun, Guan Chunwei, Li YongAbstract: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.
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Calculation of a Complex 3-D Model of a Turbogenerator With End Region Regarding Electrical Losses, Cooling, and Heating
IEEE Transactions on Energy Conversion, 2011Co-Authors: Li Weili, Guan Chunwei, Zheng PingAbstract:A significant problem of Turbogenerators on complex end structures is overheating of local parts caused by end losses and complex fluid flow in the end region. Therefore, it is important to investigate the 3-D flow and heat transfer process in the end. Using a 200-MW air-cooled Turbogenerator as an example, the influences of end cores and the actual shapes and material of the end coils, press finger, press plate, and copper shield are considered for the end field calculation; then, the physical and mathematical models of the coil end with involute portions are created. The 3-D electromagnetic field was calculated and the losses of different parts in the end and its distribution were obtained. Based on this, the losses from magnetic field calculations will be applied to the end as heat sources in the temperature field. For symmetry of the ventilated structure, the fluid and thermal physical models of the generator within the half-axial section were determined. A set of equations of fluid flow and heat transfer were derived from the fluid-solid conjugated heat transfer and the fluid and temperature distributions were obtained after solving the equations. All of the aforementioned will provide a theoretical basis for the generator safe operation.
