基于零序直流原理的电缆测距方法的研究  

Study on Method of Location of Grounded Fault Cable Based on Zero Sequence DC

作　　者：韩策[1] 袁振海[1] 俞强[1] 

机构地区：[1]南京工业大学自动化与电气工程学院,南京210009

出　　处：《电测与仪表》2013年第4期27-32,共6页Electrical Measurement & Instrumentation

摘　　要：近期一些学者提出基于零序直流原理的单分支故障电缆测距模型存在较大的误差,本文在对其理论分析的基础上对系统建模进行了改进,进而减小了误差。同时在分析检测电流与电网各参数之间关系的基础上提出了一种新的测距方法,该测距方法和其他方法相比,从理论上消除了过渡电阻和电网电压波动等因素的影响,且具有简单易实现等优点。并通过仿真验证了此方法的正确性与可行性,为进一步研究更加精确的基于零序直流原理的电缆测距方法奠定了基础。In allusion to the error of the model for Single-phase grounding ranging based on the principle of Zero- sequence DC this papaper improves the theory of system modeling, so that the error between of the actual value and experimental value is smaller. The paper also analyzes the relationship between zero sequence DC and the parameters and proposes a new location method which avoids the voltage fluctuation and the transition resistance fluctuation. The simulation shows that the validity and feasibility of the method are useful for further study of the more accurate location method.

关 键 词：零序直流 单相接地测距 模型改进 测距方法 

分 类 号：TM771[电气工程—电力系统及自动化]