方向电流保护 directional overcurrent protection(3) directional current protection(1) 目前没有对本词条修改信息

directional overcurrent protection     Influence of directional overcurrent protection setting on sensitivity and reliability     方向电流保护的整定对灵敏度及可靠性的影响 短句来源     The influence on sensitivity and reliability caused by setting calculation of directional overcurrent protection is discussed,including influence on those of high frequency components and power directional relay. New setting calculation methods and researches on sensitivity and reliability are described.     探讨了方向电流保护的整定对灵敏度及可靠性的影响,包括谐波、功率方向继电器等的影响,还探讨了一些新的整定计算方法及灵敏度、可靠性研究方面的新动向。 短句来源     Setting of directional overcurrent protection should consider surge of load current,zero sequence component short current and sensitivity co-operation factor with near power line.     方向电流保护的整定除满足电流整定一般原则外,还应考虑负荷电流突然增大、故障电流零序分量及与相邻线路保护的灵敏系数配合等因素。 短句来源   directional current protection     On direction validity of 110 kV zero-sequence directional current protection     对110kV零序方向电流保护方向正确性的讨论 短句来源   “方向电流保护”译为未确定词的双语例句     Investigation on Malfunction of Directilnal Overcurrent Relays during Reverse Fault     方向电流保护反方向故障误动作的分析与改进 短句来源     In the recent years, many scholars of the inside and outside country advance a series of arithmetics based on graph theory with reseach for the optimal setting coordination for current protection and distance protection in a complex multiloop network . the calculation for minimum break points set as stat for coordination of setting is the core of these arithmetics and large.     近年来国内外许多学者基于图论方法，对复杂环网方向电流保护和距离保护最优整定配合问题进行了研究，提出了一系列算法，其中作为整定配合起始点，且具有最少基数的保护集合——最小断点集(MBPS，即Minimum Break Point Set)的计算是整个算法的核心，也是计算量最大的部分。 短句来源     The direction validity of various zero-sequence directional current protections is dealt with in this paper.     就不同类型零序方向电流保护的方向正确性进行讨论。 短句来源 查询“方向电流保护”译词为用户自定义的双语例句     我想查看译文中含有：的双语例句

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This paper presents the implementation of non-communication protection for distribution networks with tapped-off-loads. Cooperating with the directional current protection, the microcomputer-based relay is designed to increase the responses speed of the existing current relays for the internal fault by detecting the super-imposed signals of healthy phase currents. The relay's hardware and software structures, as well as the flow chart of the software, are described. Real-time digital simulator (RTDS) tests ...             提出了有分支配电线路无通道保护的实现方案及其软硬件构成和工作流程。该保护的核心是在方向电流保护的基础上,使用非故障相电流的突变量并结合微机技术实现区内故障时电流保护的加速动作。通过实时数字仿真试验表明:该保护可显著地缩短区内不对称故障的切除时间,符合理论分析结果。 文摘来源          It's necessary to measure and verify the connection of power directional relays and the phase relation between the voltage and the current in transmission line based on some certain characteristics of it in order to assure the reliable and sensitive action in case the fault situation is positive direction and vice versa. The measure method of utilizing a watt meter to map "hexangular diagram" (the diagram of phasors' projection) is presented in this paper. The principle, method and judgement criterion to te...             为确保功率方向继电器在输电线路正方向发生故障时能够可靠灵敏地动作而在反方向故障时不动作,在已知功率方向继电器动作特性的基础上,有必要对其接线以及输电线路中的电压与电流的相位关系进行实测与检验。本文介绍了用瓦特表测量法测绘“六角图”(向量投影图)进而检验功率方向继电器接线的原理、方法及判断依据,并在实验室进行了方向电流保护动作正确性检验的动态模拟实验,其结果证实了所提方法的正确性和有效性。 文摘来源          Directional overcurrent protection with a high sensitivity is necessary to prompt reliability of electric power.The influence on sensitivity and reliability caused by setting calculation of directional overcurrent protection is discussed,including influence on those of high frequency components and power directional relay.New setting calculation methods and researches on sensitivity and reliability are described.Setting of directional overcurrent protection should consider surge of load current,zero sequenc...             为提高供电的可靠性,需要采用方向电流继电保护,并且灵敏度要高。探讨了方向电流保护的整定对灵敏度及可靠性的影响,包括谐波、功率方向继电器等的影响,还探讨了一些新的整定计算方法及灵敏度、可靠性研究方面的新动向。方向电流保护的整定除满足电流整定一般原则外,还应考虑负荷电流突然增大、故障电流零序分量及与相邻线路保护的灵敏系数配合等因素。另外,可优先采用在线整定。方向继电器的内角需合理整定。谐波滤除中数字滤波器应用越来越多,较快的滤波算法意味着实时性好、可靠性高。 文摘来源   << 更多相关文摘

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