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基于可调整电阻Crowbar电路的双馈风电机组低电压穿越方法

更新时间:2020-10-27 18:53:57 大小:3M 上传用户:zhengdai查看TA发布的资源 标签:双馈风电机 下载积分:2分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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针对传统固定阻值Crowbar保护电路很难共同抑制转子电流和直流母线电压的升高这一缺陷提出了一种基于可调整Crowbar电阻阻值的双馈风力发电机组低电压穿越方案,建立了可调整阻值的控制策略以及Crowbar阻值的标定方法;采用PSCAD/EMTDC平台,搭建DFIG及电网故障的动态仿真模型,仿真分析了电网对称短路故障期间所提方案的低电压穿越特性;结果表明:可调整电阻Crowbar方案低电压穿越的效果较好,可实现抑制转子电流的升高以及稳定直流母线电压的目的。

When the voltage drops due to a short circuit fault tha toccurs at the grid connection point,a Crowbar protection circuit on the rotor side of doubly-fed induction generator is often used to achieve low voltage ride-through function.Traditional constant resistance Crowbar is difficult to restrain both the rotor current and DC bus voltage rise.Aimed at these deficiencies,a LVRT scheme of doubly-fed induction generator based on the Crowbar with an adjustable resistor is proposed,and the adjustable resistor control strategy and the Crowbar resistance setting method are made.Based on PSACD/EMTDC simulation software,the LVRT characteristics of the Crowbar with an adjustable resistor are simulated during deep dips.The results show that the LVRT effect of the Crowbar with an adjustable resistor is better and the purpose of restraining the rotor current rise and stabilizing DC bus voltage is realized.

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基于可调整电阻Crowbar电路的双馈风电机组低电压穿越方法.pdf 3M

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