The urgent problem of the relaying protection in the modern AC/DC hybrid connected grid and the development of the wide area communication,the information process and the intelligent technology powerfully promotes the...The urgent problem of the relaying protection in the modern AC/DC hybrid connected grid and the development of the wide area communication,the information process and the intelligent technology powerfully promotes the development of the technology of the wide area relaying protection(WARP),which has become a research hotspot that attracts extensive attention.Originated from the basic concept of the wide area relaying protection,this paper analyses the advantages,the effects and the functions of the wide area relaying protection.The two main approaches to realize the wide area protection,which are on-line adaptive setting(OAS)principle and fault element identification(FEI),are introduced in this paper.Aimed at improving the performance of the backup protection,the research content and the technology demand of the wide area protection are proposed,meanwhile,the basic principle and the algorithm of the fault element identification are introduced.At last,the scheme of the limited wide area relaying protection based on the existing pilot channel of the main protection is discussed.展开更多
Power system faults can often result in excessively high currents.If sustained for a long time,such high currents can damage system equipment.Thus,it is desirable to operate the relays in the minimum possible time.In ...Power system faults can often result in excessively high currents.If sustained for a long time,such high currents can damage system equipment.Thus,it is desirable to operate the relays in the minimum possible time.In this paper,a busbar splitting approach is used for adaptive relay setting and co-ordination purposes for a system integrity protec-tion scheme(SIPS).Whenever a fault occurs,the busbar splitting scheme splits a bus to convert a loop into a radial structure.The splitting schemes are chosen such that the net fault current is also reduced.Busbar splitting elimi-nates the dependency upon minimum breakpoints set(MBPS)and reduces the relay operating time,thus making it adaptive.The proposed methodology is incorporated into the IEEE 14-bus and IEEE 30-bus systems with single and multiple fault conditions.The modeling and simulation carried out in ETAP,and the results of the proposed busbar splitting-based relay co-ordination are compared with the MBPS splitting-based relay co-ordination.展开更多
提出一种基于负序功率方向比较原理的广域继电保护算法。根据智能电子设备(Intelligent Electric Device,IED)的安装位置,形成包含有母线及线路在内的IED关联域。系统发生故障后,通过IED在关联域内对故障信息的采集和共享,结合定义的故...提出一种基于负序功率方向比较原理的广域继电保护算法。根据智能电子设备(Intelligent Electric Device,IED)的安装位置,形成包含有母线及线路在内的IED关联域。系统发生故障后,通过IED在关联域内对故障信息的采集和共享,结合定义的故障判别原则,确定故障的位置;并根据IED预定的动作策略,快速地切除故障。该算法既能做系统发生故障后快速动作的主保护,同时又兼顾后备保护的功能。通过仿真验证了该算法的有效性,表明该算法可以很好地实现主保护和后备保护的功能。展开更多
基金supported by National Natural Science Foundation of China Science Foundation of China(No.50377031 and No.50837002).
文摘The urgent problem of the relaying protection in the modern AC/DC hybrid connected grid and the development of the wide area communication,the information process and the intelligent technology powerfully promotes the development of the technology of the wide area relaying protection(WARP),which has become a research hotspot that attracts extensive attention.Originated from the basic concept of the wide area relaying protection,this paper analyses the advantages,the effects and the functions of the wide area relaying protection.The two main approaches to realize the wide area protection,which are on-line adaptive setting(OAS)principle and fault element identification(FEI),are introduced in this paper.Aimed at improving the performance of the backup protection,the research content and the technology demand of the wide area protection are proposed,meanwhile,the basic principle and the algorithm of the fault element identification are introduced.At last,the scheme of the limited wide area relaying protection based on the existing pilot channel of the main protection is discussed.
文摘Power system faults can often result in excessively high currents.If sustained for a long time,such high currents can damage system equipment.Thus,it is desirable to operate the relays in the minimum possible time.In this paper,a busbar splitting approach is used for adaptive relay setting and co-ordination purposes for a system integrity protec-tion scheme(SIPS).Whenever a fault occurs,the busbar splitting scheme splits a bus to convert a loop into a radial structure.The splitting schemes are chosen such that the net fault current is also reduced.Busbar splitting elimi-nates the dependency upon minimum breakpoints set(MBPS)and reduces the relay operating time,thus making it adaptive.The proposed methodology is incorporated into the IEEE 14-bus and IEEE 30-bus systems with single and multiple fault conditions.The modeling and simulation carried out in ETAP,and the results of the proposed busbar splitting-based relay co-ordination are compared with the MBPS splitting-based relay co-ordination.
文摘提出一种基于负序功率方向比较原理的广域继电保护算法。根据智能电子设备(Intelligent Electric Device,IED)的安装位置,形成包含有母线及线路在内的IED关联域。系统发生故障后,通过IED在关联域内对故障信息的采集和共享,结合定义的故障判别原则,确定故障的位置;并根据IED预定的动作策略,快速地切除故障。该算法既能做系统发生故障后快速动作的主保护,同时又兼顾后备保护的功能。通过仿真验证了该算法的有效性,表明该算法可以很好地实现主保护和后备保护的功能。
