中国电力教育大学院(校)长联席会
加入收藏 | 联系我们 | 后台管理
联席会学术论文专栏
联席会学术论文专栏 ·首页 > 联席会学术论文专栏
风电接入对继电保护的影响(四)——风电场送出线路保护性能分析(2013年第4期)
类别:联席会学术论文专栏 发布时间:[2014-06-16] 点击数:975

张保会1,王  进1,原  博1,郝治国1,黄仁谋2,王小立1,3
(1. 西安交通大学 电气工程学院,陕西 西安 710049;2. 海南电网公司,海南 海口 570100;
3. 宁夏电力公司调度中心,宁夏 银川 750001)

摘要: 分析了具备低电压穿越能力的双馈式风电场送出线路的故障特征,发现仅在三相金属性故障情况下风电场侧电压与电流同频率,其他故障情况下风电场侧短路电压、电流频率均不同;风电场的弱电源特性使得正负序阻抗远大于零序阻抗,接地故障时风电短路电流主要为零序分量,使得三相电流相近;风电场侧方向元件、距离元件、选相元件均无法保证正确动作。以某地区风电接入为例,对风电场送出线路保护进行动作性能测试,实验结果表明电流差动保护灵敏度降低,方向元件、距离元件、选相元件的动作性能受到严重影响。
关键词: 低电压穿越; DFIG; 风电场; 送出线路; 继电保护

Impact of wind farm integration on relay protection(4):performance analysis
for wind farm outgoing transmission line protection
ZHANG Baohui1,WANG Jin1,YUAN Bo1,HAO Zhiguo1,HUANG Renmou2,WANG Xiaoli
1,3
(1. School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;2. Hainan Power Grid
Corporation,Haikou 570100,China;3. Dispatch Center of Ningxia Electric Power,Yinchuan 750001,China)


Abstract: The fault features of outgoing transmission line in DFIG-based wind farm with the capacity of low-voltage ride-through are analyzed,which shows that,the bus voltage at wind farm side and the short circuit current have same frequency only in the case of three-phase bolted fault while they are different in other fault cases;because the weak power characteristic of wind farm makes its positive-and negative-sequence impedance far greater than its zero-sequence impedance,the wind power short circuit current of grounding fault is mainly the zero-sequence component,resulting in three nearly same phase-currents;the direction element,distance element and phase-selection element at wind farm side operate incorrectly. The operating performance of the outgoing transmission line protection is tested for a regional grid-connected wind power and the experimental result shows that,the sensitivity of current differential protection reduces and the operating performances of direction element,distance element and phase-selection element are severely affected.
Key words: low-voltage ride-through; doubly-fed induction generator; wind farms; outgoing transmission line; relay protection

点击原文:风电接入对继电保护的影响(四)——风电场送出线路保护性能分析(2013年第4期).pdf

上一条:风电接入对继电保护的影响(三)——风电场送出变压器保护性能分析(2013年第3期)
下一条:风电接入对继电保护的影响(五)——风电分散式接入配电网对电流保护影响分析(2013年第5期)
版权所有:中国电力教育大学院(校)长联席会
南京高新技术产业开发区星火路8号《电力自动化设备》杂志社 邮编:210032
工作电话:025-51859279,83537347 传真:025-83537349
苏ICP备10229478号 网站技术支持:光芒科技有限公司