特高压直流耐压实验用防风抗晕导线的设计

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Abstract To meet the emergency of unexpected powerful wind in northwest China,this article designs a new type of anti-wind and anti-corona 24-bundle conductors for DC 800kV voltage withstand test. Based on computational fluid dynamics(CFD) and charge simulation method(CSM),this paper calculates and analyzes a series design parameters of conductors’ related aerodynamics characteristic in wind velocity field as well as its 3D electric field by solving the corresponding 2D reynolds averaged navier-stokes(RANS) equation of the air-bundled conductors system and potential coefficient matrix. Aim to suppress corona and wind deviation angle,this article determines the diameter of sub- conductors,radius of spacing plate and split number of test conductors considering its electric characteristic as well as mechanical performance. Calculation results indicates that a critical conductor spacing ratio exists when interference effect reaches its peak value,and wind deviation angle can be strongly influenced by the interference effect between sub-conductors,and at the wind speed of 13.8m/s,the wind deviation angle of test conductors can be suppressed under 25°and the maximum surface voltage gradient under 27kV/cm. It concludes that the anti-wind and anti-corona 24-bundle conductors for DC 800kV voltage withstand test possesses an excellent electrical and mechanical performance to make sure the test procedure in safe.

Key words： UHV CFD wind declination interference effect CSM surface voltage gradient

Received: 29 June 2013 Published: 22 January 2015

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TM247

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