分裂式光伏升压变压器的研究与设计

发布时间：2018-04-12 07:17

本文选题：光伏电站 + 轴向双分裂变压器　；参考：《东北大学》2014年硕士论文

【摘要】：光伏升压变压器作为光伏电站的重要设备,它将逆变器中输送的交流电进行适当升压后输送给相应的电网。因此开展对光伏升压变压器的设计研究,使其具备一定的低电压穿越能力和良好的阻抗经济运行特性,满足光伏发电所具有的波动性、间歇性要求,保证大型并网光伏电站能够安全稳定的运行,具有十分重要的经济意义。本文在阅读了大量国内外文献的基础上,总结了变压器的基本结构、工作原理和主要技术参数,将传统的光伏升压变压器结构设计为轴向双分裂这一结构型式。在建立了轴向双分裂变压器等效电路和磁路模型的基础上,运用有限元分析软件ANSYS对其漏磁场进行了仿真分析。另外,本文对轴向双分裂变压器经济运行时负荷技术参数的计算方法进行了推导。其次,本文根据仿真后阻抗电压的大小,论证了分裂式光伏升压变压器具有低电压穿越能力这一理论。通过对光伏电站的构成、运行方式和并网光伏电站的技术要求进行分析研究,完成了分裂式光伏升压变压器的具体电磁设计方案。并且依据变压器十年变电成本原理,得出分裂式光伏升压变压器的应用具有明显的节能经济效益。最后,利用ANSYS仿真软件对轴向双分裂光伏升压变压器的穿越阻抗、半穿越阻抗、分裂阻抗进行了分析计算,在仿真结果中验证了运用有限元方法计算阻抗电压的正确性和精准性。
[Abstract]:The PV step-up transformer is an important equipment of photovoltaic power plants, it will be delivered in the appropriate AC inverter voltage supplied to the corresponding grid. So to carry out the research and design of the PV step-up transformer, which has certain LVRT capability and good impedance characteristics of economic operation, meet the fluctuation of the photovoltaic power generation is intermittent to ensure the requirements of large scale grid connected photovoltaic power plant can run safely and stably, has very important economic significance. On the basis of reading a large number of domestic and foreign literature, summarizes the structure of transformer base, main technical parameters and working principle, the design of the structure of the traditional PV step-up transformer for axial double split this structure. Based on the axial double split transformer equivalent circuit and magnetic circuit model, using the leakage magnetic field of finite element analysis software ANSYS The simulation and analysis. In addition, the calculation method of load parameters of technical and economic operation axial double split transformer are deduced. Secondly, based on the magnitude of the impedance voltage after the simulation demonstrates the split type PV step-up transformer with low voltage ride through capability of this theory. Through the form of photovoltaic power plants, analysis of operation and the grid connected photovoltaic power plant technology, complete the specific electromagnetic design of split type PV step-up transformer. Transformer substation and on the basis of ten years cost principle, the application of split type PV step-up transformer has obvious economic benefit. Finally, the axial double split PV step-up transformer impedance through using the ANSYS simulation software, half through the impedance splitting impedance is analyzed and calculated, the simulation results verified the calculation of impedance voltage by using the finite element method is correct Sex and precision.

【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM402;TM615

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