110kV海上供电并列线路尾端短路瞬时切除的研究  

Study on Instantaneous Fault Clearing of Short Circuit at Terminal of 1lo kV Offshore Power Supply Parallel Line

作　　者：毛爱军 蒋忠江 高志鹏[1] 荣士峰 王柏森[2] Mao Aijun;Jiang Zhongjiang;Gao Zhipeng

机构地区：[1]胜利石油管理局有限公司电力分公司,山东东营257000 [2]胜利油田分公司海洋采油厂,山东东营257237

出　　处：《上海电气技术》2024年第4期47-50,58,共5页Journal of Shanghai Electric Technology

摘　　要：胜利油田110kV海上供电并列线路采用距离保护和零序保护,Ⅰ段瞬时保护不能保护线路全长,线路尾端的故障只能由Ⅱ段保护、Ⅲ段保护动作切除,故障延时切除造成电网波动和大范围油井停井。由此,对110kV海上供电并列线路尾端短路瞬时切除进行研究。结合海上供电线路双回并列供电特殊方式和现有保护装置保护功能,讨论并验证不对称相继速动保护和双回线相继速动保护的应用效果。论述了不对称相继速动保护和双回线相继速动保护的原理,分析了保护动作,介绍了保护设置。应用不对称相继速动保护和双回线相继速动保护,较好地实现了双回并列供电线路尾端短路的瞬时切除,避免双回并列供电线路尾端短路造成的较大范围油井波动停井,并且几乎无改造成本。The 110kV offshore power supply parallel line of the Shengli Oilfield adopts distance protection and zero-sequence protection.The SectionⅠinstantaneous protection cannot cover the entire line,and fault at the line terminal can only be cleared by the SectionⅡand SectionⅢprotections,with delayed fault clearing causing power grid fluctuation and widespread oil well shutdown.Therefore,the instantaneous fault clearing of short circuit at the terminal of 110kV offshore power supply parallel line was investigated.By considering the special dual-circuit parallel supply mode of offshore power line and the protection function of the existing protection device,the application effectiveness of asymmetric successive fast-acting protection and dual-circuit successive fast-acting protection was discussed and verified.The principles of asymmetric successive fast-acting protection and dual-circuit successive fast-acting protection were elaborated,the protection action was analyzed,and the protection setting was introduced.The application of asymmetric successive fast-acting protection and dual-circuit successive fast-acting protection successfully achieves instantaneous fault clearing of short circuit at the terminal of dual-circuit power supply parallel line,preventing large-scale oil well shutdown caused by short circuit at the terminal of dual-circuit power supply parallel line,with almost no reconstruction cost.

关 键 词：供电线路 短路 微机保护 研究 

分 类 号：TM773[电气工程—电力系统及自动化]