Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

Article retrieval

文章检索

首页 >> 文章检索 >> 往年索引

变电站直流电源系统环网故障分析

来源:电工电气发布时间:2023-07-27 13:27 浏览次数:325

变电站直流电源系统环网故障分析

张讥培,刘亚娟,程意平
(国网河南省电力公司平顶山供电公司,河南 平顶山 467200)
 
    摘 要:随着对电网安全要求越来越高,因直流环网引起的继电保护装置拒动和误动案例也越来越多。介绍了直流环网类型及原因,并讨论了不同直流环网类型对直流电源影响表征现象和影响程度,发现按直流环网对直流系统的影响程度和紧急情况而言,两极异极环网最为严重,单极异极环网次之,同极环网影响程度最小,为现场检修人员提供了判断依据,缩短了故障查找和处理时限。
    关键词: 直流环网;过渡电阻;对地电压
    中图分类号:TM711     文献标识码:B     文章编号:1007-3175(2023)07-0037-04
 
Ring Network Fault Analysis of DC Power Source System in Substations
 
ZHANG Ji-pei, LIU Ya-juan, CHENG Yi-ping
(State Grid Henan Electric Power Company Pingdingshan Power Supply Company, Pingdingshan 467200, China)
 
    Abstract: As the requirements of power grid security become higher, more and more cases of refuse operation and false action of relay protection devices caused by DC ring network appear. The paper introduces the types and causes of DC ring network and discusses the effects of different types of DC ring network on DC power source characterization and influence degree. From the perspective of the influence degree of DC ring network on DC system and emergency situation, bipolar heteropolar ring network is the most serious, unipolar heteropolar ring network is the second, and homopolar ring network has the least influence degree. Therefore, the above conclusion can provide judgment basis for on-site maintenance personnel and shorten the time of fault search and treatment.
    Key words: DC ring network; transition resistance; ground voltage
 
参考文献
[1] 李晶,陈缨,陈轲娜,等. 发电厂和变电(换流)站直流电源系统可靠性[M]. 北京:中国电力出版社,2018.
[2] 赵张磊,刘希嘉,陈刚,等. 变电站直流异极性环网故障分析与解决方案[J]. 电工技术,2019(21):110-112.
[3] 中国电力企业联合会. 电力系统用蓄电池直流电源装置运行与维护技术规程:DL/T 724—2021[S]. 北京:中国电力出版社,2021:7.
[4] 李善龙.变电站直流绝缘检测系统设计及应用研究[D].济南:山东大学,2016.
[5] 全杰雄,温才权. 变电站直流系统直流互窜事件分析[J]. 电工技术,2020(22):98-100.
[6] 梁建斌. 变电站直流系统接地故障查找的研究[D].广州:华南理工大学,2013.
[7] 吴剑鸣,严正. 控制电缆的分布电容对继电保护的影响及防范措施[J] . 电力自动化设备,2007,27(11):115-118.
[8] 李应文,彭明智,张纯. 变电站直流电源系统直流环网与交流窜入的原因及危害[J] . 自动化与仪器仪表,2018(7):57-60.
[9] 黄志鹄. 变电站直流电源系统两段母线环网故障分析[J]. 广西电业,2011(12):83-84.
[10] 中国电力企业联合会. 直流电源系统绝缘监测装置技术条件:DL/T 1392—2014[S] . 北京:中国电力出版社,2015:3.