±800kV直流输电线路边界保护的模型匹配时域算法  

± 800kV DC Transmission Line Boundary Protection Using Model Matching Algorithms in Time-Domain

作　　者：束洪春[1] 田鑫萃[1] 董俊[2] 张广斌[2] 刘可真[2] 孙士云[1] 杨毅[1] 

机构地区：[1]昆明理工大学电力工程学院,昆明650051 [2]哈尔滨工业大学电气工程与自动化学院,哈尔滨150001

出　　处：《电工技术学报》2013年第10期320-327,共8页Transactions of China Electrotechnical Society

基　　金：国家高技术研究发展计划(863计划)(2012AA050213);国家自然科学基金(50977039;U1202233;51267009);云南省科技攻关项目(2011BA004);重点项目(2011FA032);高等学校博士学科点专项科研基金(20105314110001)资助项目

摘　　要：根据±800kV直流输电系统故障分量附加网络电气特征,建立合理简化的直流输电线路区内和区外故障模型,且以平波电感模型为基准模型,将实测的线路电压电流与平波电感模型进行匹配,可识别线路区内故障和区外故障:当直流线路发生区内故障时,线路两侧的实测电压、电流均满足平波电抗器的电压和电流关系(VCR),即线路两侧实测电压电流与平波电感模型相匹配,模型误差小;当直流线路发生区外故障时,故障侧电压电流不满足平波电抗器的VCR,即故障侧实测电压电流与平波电感模型不匹配,模型误差大。大量数字试验表明,此种利用模型匹配时域算法构建的UHVDC线路边界保护元件,原理正确,方法可靠。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.

关 键 词：特高压直流 输电线路边界保护 故障暂态分量 模型匹配 模型误差 

分 类 号：TM773[电气工程—电力系统及自动化]