多工况下同步调相机端部磁场与结构件涡流损耗分析
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摘要
特高压直流输电系统中的同步调相机需要在电网出现暂态故障时快速提供无功补偿,常工作在空载、过励和欠励工况,为了使端部结构件的设计满足多工况运行的要求,需要对多工况运行下的端部磁场与端部结构件涡流损耗进行校核。本文以一台300MVar同步调相机为例,建立了端部三维瞬态时步有限元计算模型,对空载、过励、失磁稳态三种典型运行工况下的端部磁场和结构件涡流损耗进行了对比分析,为大容量同步调相机端部结构件优化设计提供理论支持。
The synchronous compensator in ultra-high voltage power transmission system need to provide reactive power compensation fast when transient faults occur in the system, which usually operates under no-load, over-excited and under-excited conditions. The magnetic field and eddy current losses of end structures under multiple load conditions need to be checked in order to meet the demands of multiple load conditions. A 300 MVar synchronous compensator is taken as an example in this paper, the three-dimensional transient time step finite element model is established,the magnetic field and eddy current losses of end structures under no-load, over-excited and no-excited conditions are compared and analyzed, which will provide theoretical basis for the optimal design of end structures in synchronous compensator.
The synchronous compensator in ultra-high voltage power transmission system need to provide reactive power compensation fast when transient faults occur in the system, which usually operates under no-load, over-excited and under-excited conditions. The magnetic field and eddy current losses of end structures under multiple load conditions need to be checked in order to meet the demands of multiple load conditions. A 300 MVar synchronous compensator is taken as an example in this paper, the three-dimensional transient time step finite element model is established,the magnetic field and eddy current losses of end structures under no-load, over-excited and no-excited conditions are compared and analyzed, which will provide theoretical basis for the optimal design of end structures in synchronous compensator.
引文
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[11]李朝科,李志强,肖翦,等.300Mvar调相机端部电磁场三维有限元分析[J].东方电气评论,2016,30(119):19-23.
[2]张杰,雷雨,孙士涛.HVDC工程中的同步调相机应用案例综述[J].大电机技术,2017(7):62-67.
[3]Rychkov S I.Reactive power control services based on a generator operating as a synchronous condenser[J].Power Technology&Engineering,201346(5):405-409.
[4]Fujita M,Tokumasu T,Yoda H,et al.Magnetic field analysis of stator core end region of large turbogenerators[J].IEEE Trans on Magn,2000,36(4):1850-1853.
[5]Joshi T,Baker A E.Turbine-generator end-region analysis using the quasi-3D method[C]//Iet,International Conference on Computation in Electromagnetics.IET,2011:1-2.
[6]Liang Y,Bian X,Yu H,et al.Finite-Element Evaluation and Eddy-Current Loss Decrease in Stator End Metallic Parts of a Large Double-Canned Induction Motor[J].IEEE Transactions on Industrial Electronics,2015,62(11):6779-6785.
[7]Liang Y,Yu H,Bian X.Finite-Element Calculation of 3-D Transient Electromagnetic Field in End Region and Eddy-Current Loss Decrease in Stator End Clamping Plate of Large Hydrogenerator[J].IEEETransactions on Industrial Electronics,2015,62(12):7331-7338.
[8]梁艳萍,张沛,陈晶,等.1000MW空冷水轮发电机端部结构件涡流损耗[J].电工技术学报,2012,27(12):213-218.
[9]梁艳萍,黄浩,李林合,等.大型空冷汽轮发电机端部磁场数值计算[J].中国电机工程学报,2007,27(3):73-77.
[10]M.H.Henry,P.Juha,N.Janne,et al.3-D finite element method analysis of additional load losses in the end region of permanent-magnetic generators[J].IEEE Transactions on Magnetics,2012,48(8):2352-2357.
[11]李朝科,李志强,肖翦,等.300Mvar调相机端部电磁场三维有限元分析[J].东方电气评论,2016,30(119):19-23.