Analysis for magnetic field disturbance of modular multilevel converter based high voltage direct current(MMC-HVDC)converter valve  

作　　者：Lei Qi Muxue Wang Xiangyu Zhang Hong Shen Hongyu Wang Chongqing Jiao 

机构地区：[1]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing,China

出　　处：《High Voltage》2023年第1期91-101,共11页高电压（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Number:51977073;China Postdoctoral Science Foundation,Grant/Award Number:2020M680484;Fundamental Research Funds for the Central Universities,Grant/Award Number:2021MS003。

摘　　要：The standardised design and operational reliability enhancement of the flexible DC converter valve are impending with the construction of high shares of renewables and power electronics power system.A power frequency magnetic field calculation model able to obtain the electromagnetic disturbance at the submodule(SM)drive board during normal operation of a flexible DC converter valve is presented.Hundreds of SMs with complex structures in a converter valve tower are simplified by the equivalent to the line current to fulfil calculation accuracy requirements.In addition,a random function is employed to simulate the non-sequential switching process of the SMs.By comparing the calculated results with the measured data obtained from the SM equivalent operation experiment of 2200 V/2150 A,the validity of the calculation model is confirmed.According to the final calculations,the influence of non-sequential switching cannot be ignored when recognising the time-domain distribution features of the power frequency magnetic field of the drive board.However,engineering design can be guided only by the power frequency magnetic field intensity of the drive board calculated based on SM’s full removal in the valve tower.

关 键 词：DISTURBANCE CONVERTER MAGNETIC 

分 类 号：TN624[电子电信—电路与系统]