1) the variation of power-frequency current
工频电流变化量
1.
By analyzing the rule of voltage,zero-sequence current,zero-sequence power and the variation of power-frequency current during single-phase grounding fault in isolated neutral distribution network in detailed,their characteristics are found.
对中性点不接地电网中发生单相接地故障时系统的电压、零序电流、零序功率和工频电流变化量的规律进行了详细的分析,得出了它们的特征。
2) power frequency variation current
工频电流突变量
3) power frequency variation
工频变化量
1.
Application of the power frequency variation principle in single source and short distance transmission line;
工频变化量原理在单电源系统中的应用
2.
The paper discusses the advantage and the disadvantage of the microcomputer distance protection device based on the power frequency variation principle which will be applied in the background of 110kV short distance transmission line with single source.
论述了在 1 1 0kV单侧电源短距离重要输电线路这一特殊应用背景下 ,微机距离保护装置采用工频变化量距离保护原理的优越性和不足之处。
3.
According the special application background of the single source and the short line in the 110kV power system , the author proposed a feasible protective scheme ,in which the power frequency variation distance protect theory with combination to the four- lateral distance relay is used as quick and mainly theory.
本人针对110KV单电源短线路这一特殊应用背景，提出了以工频变化量距离保护为快速主保护，结合四边形三段式相间和接地距离保护的保护原理方案。
4) DPFC
工频变化量
1.
Setting verification of DPFC distance relay;
工频变化量距离继电器的定值校验
2.
This paper summarizes the research and application progress of NARI-RELAYS in protection based on DPFC, and introduces the key technology employed in line, busbar, transformer and generator protection.
文章总结了南京南瑞继保电气有限公司在以工频变化量为理论基础的系列保护元件方面的研究与应用成果,介绍了线路保护、母线保护、变压器保护、发电机保护方面所采用的关键技术,阐明了微机保护装置采用主后综合,双套配置的合理性和优势。
5) power frequency variable
工频变化量
1.
The shortcomings of the protection itself is pointed out through analysis of examples and discussion on these two methods for microcomputer based power frequency variable distance protection.
从微机工频变化量距离保护两种试验方法和试验结果之间的矛盾入手，在分析其原理的基础上，以实例分析和讨论这两种方法，指出了保护本身的不足之处。
6) power-frequency component variation
工频变化量
1.
Based on the characteristics of DC-system impedance of power-frequency component variation under different conditions of commutation failures in HVDC system,the influence of the transient power converse caused by commutation failure on the operation of directional relays for the different unfaulted transmission lines is analyzed.
基于各种换相失败情况下的直流系统等值工频变化量阻抗特性,对非故障线路的工频变化量方向元件动作特性进行了理论研究,分析了直流换相失败暂态过程造成非故障线路方向元件所感受到的暂态功率方向突变的问题;在此基础上结合方向纵联保护不同的动作逻辑,对直流换相失败暂态过程引起非故障线路方向纵联保护误动情况进行了分析;基于PSCAD/EMTDC的仿真验证了理论分析的正确性。
2.
Based on impedance characteristics of equivalent power-frequency component variation under different situation of commutation failures in HVDC system,combined with directional protection principle for power-frequency component variation,the influence mechanism of communication failure on the operation of directional relays for the different faulted transmission lines is analyzed.
基于不同换相失败情况下的直流系统等值工频变化量阻抗特性,结合工频变化量方向保护原理,分析了不同输电线路故障时,直流换相失败对故障线路工频变化量方向元件产生影响的机理,并对各种情况下导致故障线路工频变化量方向纵联保护拒动的条件进行了深入分析。
3.
The HVDC transmission affects the operation of directional protection based on power-frequency component variation for ac transmission lines.
直流馈入将造成交流电网工频变化量方向保护动作特性发生变化。
补充资料：工频突变量距离继电器
工频突变量距离继电器
distance relay using sudden change of power frequency component
，U，’，尸川luUI0n.IOng jull!一d旧nq，工绷突变.距离继电姗sudden ehan罗of power 见距离继电器. (distanee relay usingfrequeney eomponent)
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条