适用于双馈风电场集电线路保护的LVRT保护动作判据  

Research on the influence of a LVRT control strategy on the current protection of wind farm collection lines

作　　者：刘书玉 刘毅力[1] 董哲 Liu Shuyu;Liu Yili;Dong Zhe(School of Electronic Information,Xi'an Polytechnic University,Xi'an 710048,China)

机构地区：[1]西安工程大学电子信息学院,陕西西安710048

出　　处：《可再生能源》2022年第7期938-944,共7页Renewable Energy Resources

基　　金：国家自然科学基金项目(52007138)。

摘　　要：风电机组在低电压穿越时,传统三段式电流保护可能发生拒动。文章分析了双馈风力发电系统在低电压穿越时的特性,并基于撬棒保护和直流卸荷(Crowbar+DC-Chopper)保护的短路电流具有快速衰减特点,及其对集电线路继电保护的影响,采用保护电路投入的判据,提出了一种改进的电流保护方案。建立风电场仿真模型,验证改进方案的有效性。When the wind turbine is low voltage through,the traditional three-stage current protection may resist.In this paper,the influence of dou-bly-fed wind power generation system on low-voltage ride-through control measures is analyzed.Short-circuit current based on Crowbar protection and DCChopper protection features fast attenuation,and its impact on the relay protection of collector lines.Using the criterion of protection circuit inp.u.t.An improved current protection scheme is proposed.A simulation model of the wind farm is established and the effectiveness of the improvement scheme is verified.

关 键 词：低电压穿越 Crowbar保护 DC-Chopper保护 集电线路电流保护 

分 类 号：TK81[动力工程及工程热物理—流体机械及工程]