Abstract：The DC transmission line internal fault and external fault model are established by reasonable simplification based on electrical Characteristics of fault induce component for ± 800kV DC (UHVDC) transmission system. The smoothing inductor model is used for the base line mode, and the measured line voltage and current is used to match inductor model, which can identify the external fault and internal fault. If the fault occurs at the internal of line protection, line both sides of the measured voltage and current meet the smoothing reactor voltage and current relationship(VCR).The measured voltage and current is matched with the smoothing inductor model and the model error is small. If the fault occurs at the external of line protection, the measured voltage and current at fault side don’t meet the smoothing reactor voltage and current relationship(VCR).The measured voltage and current match with the smoothing inductor model and the model error is large. A large number of digital tests show that the model matching algorithm in time-domain is used to construct UHVDC line boundary protection method is correct and reliable.
束洪春, 田鑫萃, 董俊, 张广斌, 刘可真, 孙士云, 杨毅. ±800kV直流输电线路边界保护的模型匹配时域算法[J]. 电工技术学报, 2013, 28(10): 320-327.
Shu Hongchun, Tian Xincui, Dong Jun, Zhang Guangbin, Liu Kezhen, Sun Shiyun, Yang Yi. ± 800kV DC Transmission Line Boundary Protection Using Model Matching Algorithms in Time-Domain. Transactions of China Electrotechnical Society, 2013, 28(10): 320-327.
2013, Vol. 28 
