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.
作者
刘书玉
刘毅力
董哲
Liu Shuyu;Liu Yili;Dong Zhe(School of Electronic Information,Xi'an Polytechnic University,Xi'an 710048,China)
出处
《可再生能源》
CAS
CSCD
北大核心
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)。
