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1)  fast-tripping zero-sequence current protections
零序电流速断保护
1.
Aimed at the limitation of the sensitivity of the fast-tripping zero-sequence current protections affected by varieties of system operation conditions and by differences of grounded fault types,this paper presents a feasible design of real-time calculation on system parameters to realize the adaptive fast-tripping zero-sequence current protections.
针对传统零序电流速断保护[1]的灵敏度受系统运行方式变化和接地短路类型影响的局限性,提出了实时检测系统参数来实现自适应式零序电流速断保护
2)  zero sequence current protection
零序电流保护
1.
Calculating coverage of zero sequence current protection based on node impedance matrix;
一种基于节点阻抗矩阵快速求取零序电流保护高段保护范围的新方法
2.
The grounding current value,fault current feature of the small resistance grounding system and ranges of zero sequence current protection when grounding transformer is connected to different position are analyzed.
介绍了小电阻接地系统的接地变压器接于不同位置时的接地电流值和故障电流的特征,分析了零序电流保护范围的不同。
3.
If the constant zero sequence impedance is used to set the current, the zero sequence current protection can not operate correctly.
电力电缆的零序阻抗随零序电流的大小而改变,如果采用恒定值的零序阻抗来进行零序电流保护的整定,容易导致保护的不正确动作。
3)  zero sequence protection
零序电流保护
4)  zero-sequence current protection
零序电流保护
1.
Analysis of malfunction of grounding transformer s zero-sequence current protection in 10 kV low resistance grounding system;
10kV小电阻接地系统接地变压器零序电流保护误动分析
2.
The zero-sequence current protection is an important means of power system ground protection.
零序电流保护是一种重要的接地保护方法。
3.
The line protection scheme with zero-sequence current protection and distance protection as the main protection is proposed for the radial system with a single power source during the initial stage of black-start.
针对电力系统黑启动过程的特殊要求,提出了其继电保护配置的基本原则;研究了适用于黑启动初期单电源运行方式下以零序电流保护和距离保护为主的线路保护配置方案;在分析不同运行方式下零序故障电流特点的基础上,研究并提出了零序电流保护的整定方法。
5)  instantaneous overcurrent protection
电流速断保护
6)  adaptive zero-sequence current protection
自适应零序电流保护
1.
After pointing out the shortcomings of traditional zero-sequence current protection,the paper expounds the basic principles and realization methods of adaptive zero-sequence current protection,and illustrates that the new protection can enhance sensitivity.
指出了传统零序电流保护整定缺点,论述了自适应零序电流保护的实现原理和具体实现方法,并举例说明了自适应零序电流保护具有提高保护灵敏度的优点。
补充资料:零序电流互感器
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性质:剩余电流型漏电保护装置的检测元件。其铁心多是环形的。所有电源线(两根、三根或四根)穿过互感器铁心构成互感器的原边;其二次线圈与极化电磁铁或电子线路联接。正常运行时,互感器一次边各线在铁心中产生的磁通互相抵消,二次线圈不产生感应电动势,漏电保护装置不动作;当后方发生漏电或有人触电时,出现剩余电流,二次线圈产生感应电动势,漏电保护装置动作。纯电磁式剩余电流型漏电保护装置的零序电流互感器必须具有很高的灵敏度。其铁心用铁镍合金或非晶态材料制成。

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