基于单端电气量减少过渡电阻影响方法  被引量:1

Method to Reduce Influence of Transition Resistance Based on Single-End Electric Quantity

在线阅读下载全文

作  者:董晓峰[1] 蒋振国[1] 杨晓伟[1] 周恒[1] 

机构地区:[1]苏州供电公司,江苏苏州215004

出  处:《电工电气》2015年第9期16-21,共6页Electrotechnics Electric

摘  要:针对输电线路单相高阻接地时故障特征不明显,容易造成距离保护的拒动或误动的问题,计及零负序电流分配系数影响,介绍了一种基于单端电气量的精确算法。通过EMTDC/PSCAD仿真分析可知,新算法在不同负荷电流、不同过渡电阻情况下均能准确测量故障阻抗。该算法具备较高耐受过渡电阻的能力,且易于在工程应用中实现。In allusion to that the weak fault features in the single-phase high-resistance faults easily make protection refuse oper-ate, this paper introduced an algorithm, based on single-end electric quantity, possessing a higher tolerance for transition resistance accounting in the zero/negative sequence current partition coefficient. The results of EMTDC/PSCAD simulation show that the new algorithm could accurately calculate the fault impedance under various load currents and different transition resistances, with the abil-ity of higher tolerance for transition resistance, easy to get in practical project.

关 键 词:距离保护 过渡电阻 接地距离继电器 负荷电流 

分 类 号:TM75[电气工程—电力系统及自动化]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象