| Along with our country electric utility developing at a very fast speed,the transmission voltage grade improves constantly.The UHVDC transmission has been developing because of the unique advantages in the large capacity,long distance transmission field.The UHVDC dry-type smoothing reactor is one of the most important equipment of UHVDC transmission,and reactor manufacturing at home and abroad pays close attention to research of dry-type smoothing reactor.But there is not much systematic research paper of UHV and heavy current smoothing reactor at home.The design requirements of ± 800kV/6250 A UHVDC dry-type smoothing reactor is introduced firstly which is putted by Shandong Electrician Electrical Equipment Co.,LTD.Then the basic structure and inductor electrical parameters of ±800kV/6250 A UHVDC dry-type smoothing reactor is designed,and the accuracy of inductance calculation results are verified through the ANSYS simulation method and test.On the basis of the inductance calculation,the circuit topology of reactor is analyzed,and the DC current and harmonic current of each coating are calculated.With each layer coating current as excitation source,and the dc resistance loss,the harmonic current and harmonic current ohm resistance loss distribution of eddy current loss are obtained.The two-dimensional simplified calculation model of ±800kV/6250 A UHVDC dry-type smoothing reactor is established,and the dc static magnetic field distribution and the harmonic magnetic field distribution are obtained by using the finite element software ANSYS,then the accuracy of the harmonic magnetic field numerical calculation results are verified in the process of loss calculation.Finally,the steady fluid and solid coupling mathematical calculation model of temperature field is established by using computational fluid mechanics and heat transfer theory,and the temperature field distribution characteristics are obtained with the finite volume method.The design of ±800kV/6250 A UHVDC dry-type smoothing reactor in this paper could meet temperature rise requirement in national standard. |
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