A New Protection Scheme for DC Substation System Based on Single-ended Measurement

被引：0
|
作者：
Wang, Congbo [1 ]
Jia, Ke [1 ]
Zhao, He [2 ]
Bi, Tianshu [1 ]
Li, Zijin [2 ]
Liu, Bohan [3 ]
机构：
[1] North China Elect Power Univ, State Key Lab Alternate Elect Power Syst Renewabl, Beijing, Peoples R China
[2] Beijing Elect Power Res Inst, Beijing, Peoples R China
[3] State Grid AC Project Construct Co Ltd, Beijing, Peoples R China
来源：
2017 20TH INTERNATIONAL CONFERENCE ON ELECTRICAL MACHINES AND SYSTEMS (ICEMS) | 2017年
关键词：
DC distribution system; fault analysis; current transient; fault identification;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In order to meet the selectivity and the speed requirement of DC protections, this paper proposes a new DC protection scheme for DC substation systems. This scheme is developed based on the single-ended natural variation characteristics of DC current and its first and second derivatives under fault transients. It extracts the transient characteristic difference between the internal fault and external fault to realize the fault identification. The proposed scheme can identify internal fault or external fault quickly without communication, which satisfies the speed, reliability and selectivity requirements of the protection. Tests on PSCAD/EMTDC was carried out to verify the feasibility and superiority of the proposed scheme.
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页数：5
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