方向保护,directional protection
1)directional protection方向保护
1.Simple loop topology analysis based on adaptive Petri net fordirectional protections in multi-loop electric power network;基于适应型Petri网的多环电网方向保护简单回路拓扑分析
2.Scheme for transient traveling wave -baseddirectional protection using mathematical morphology;基于数学形态学的暂态行波方向保护方案
3.An analysis on protection feature adaptation to four-circuit transmission lines on a same tower is discussed, with respect to line distance protection,directional protection and segregated phase current differential protection in principle respectively.从原理上分别对线路距离保护、方向保护、分相电流差动保护在同塔并架四回线中的保护特性进行了适应性分析,并对同塔并架四回线中的保护选相进行了阐述,据此提出了适应于同塔并架四回线的线路主保护及后备保护配置方案。
英文短句/例句
1.Performance of Directional Protection Based on Variation of Power-frequency Components in HVDC/AC Interconnected System Part Three Response of the Directional Protection for Unfaulted Lines直流馈入下的工频变化量方向纵联保护动作特性分析 (三)非故障线路的方向保护
2.Performance of Directional Protection Based on Variation of Power-frequency Components in HVDC/AC Interconnected System Part Two Response of the Directional Protection for Faulted Line直流馈入下的工频变化量方向纵联保护动作特性分析 (二)故障线路的方向保护
3.Novel Transient Travelling Wave Based Amplitude Comparison Ultra High Speed Directional Protection新型暂态行波幅值比较式超高速方向保护
4.Digital watermark──a new trend in digital works copyright protection;数字水印——数字作品版权保护的新方向
5.Study of the Development of Sustainable Industriesin the Headwaters-Protected Areas;水源保护区可持续产业发展方向研究
6.On the Coal Preparation Technology Trend & Environmental Protection in China我国选煤技术的发展方向与环境保护
7.Directional Overcurrent Protection for Distribution Systems Containing Distributed Generation含分布式电源的配电网方向过流保护
8.Where the Way is:Dilemma and Outlet of Uninhabited Ancient Village"s Protection路在何方——“空巢”古村落保护的困境与策略性方向
9.A Novel Algorithm for Negative Sequence Pilot Protection Applicable to Open-phase Transmission Lines非全相运行输电线路负序方向纵联保护方法
10.The Study of Distributed Digital Bus Protection Based on Directional Discrimination;基于方向识别的分布式母线保护的研究
11.Microprocessor-based Adaptive Directional Segregated Current Differential Pilot Protection for Transmission Lines;输电线微机自适应分相方向电流差动纵联保护
12.The Condition and Developing Direction of Protecting Intellectual Property Right of Agricultural Technology of Our Country;我国农业技术知识产权保护现状及发展方向
13.Probing into the Teaching Reform in Thesis Program for Relay Protection Majors;继电保护专业方向毕业设计的改革初探
14.Study on Integral Based Travelling Wave Directional Unit Protection for Transmission Line输电线路积分型行波方向纵联保护研究
15.Directional Element Based on Phase-angle Difference for Generator Stator Grounding Protection基于相角差的发电机定子接地保护方向元件
16.Actuality and direction of over-winding buffers in mining hoist立井提升过卷保护装置现状及发展方向
17.The Clue and Tendency of American Business Method Patent美国商业方法软件专利保护的脉络和动向
18.Two-End Cooperation of Directional Comparison Pilot Protection Based on Transient基于暂态量的方向纵联保护双端配合问题研究
相关短句/例句
directional protective relaying方向保护
1.A new criterion of ultra high-speeddirectional protective relaying based on fault component voltage is proposed.文中充分利用正、反方向故障时补偿电压突变量与母线电压突变量的变化规律 ,提出了基于补偿电压的突变量方向判别原理 ,详细分析了该判据在各种不同运行工况下的动作特性 ,并指出了该保护判据的基本整定原则及尚需注意的问题 ;此外 ,文中还针对方向保护所遇到的一些特殊问题进行了详尽的分析。
2.The principle ofdirectional protective relaying based on wavelet transform for detection of fault information and amplitude com parison of travelling wave is presented.以小波变换为工具提取故障后的行波信息 ,并通过小波变换实现行波幅值比较式方向保护。
3.and then the principle ofdirectional protective relaying basedon polarity comparison of travelling wave is analyzed by using wavelet transform.以小波变换为工具提取行波信号中的故障信息 ,实现行波极性比较式方向保护原理 ,避免了基于该原理的 RALDA保护受谐波影响的问题。
3)direction protection方向保护
4)directional relay方向保护
1.A newdirectional relay algorithm for high voltage line is proposed using generalized phasor and symmetrical component method.该继电器的动作速度快于常规的基于工频电气量的方向保护 ,其可靠性优于行波方向保护 ,且具有较高的灵敏度。
5)current direction protection电流方向保护
1.This paper introduces the principle of transverse differentialcurrent direction protection ,which takes positive sequence voltage as its polarizing voltage, and during the simulation experiment of 500 kV double circuit lines on the same tower system ,how does this protection behave.介绍了以正序电压作为极化电压的横联差动电流方向保护的原理及其在500kV同杆双回线系统中的仿真实验情况。
6)directional current protection方向电流保护
延伸阅读
功率方向保护利用电压和电流的乘积判明电流流向（相位）的继电保护。用于多侧电源的系统。其主要元件是功率方向继电器，由电流互感器和电压互感器(见互感器)取得电流、电压信号，以判明短路故障位于保护装置处的正向或反向。功率方向继电器的接入必须十分注意电流、电压接线端子的极性，以免造成系统继电保护的大面积误动或拒动。用于相间短路的功率方向继电器,应采用90°接线方式,即A相继电器接夒Α和妧BC,余类推。这样可使两相短路时无电压死区(指无法保护的电压区段)；正确选择继电器内角，可使三相短路时的电压死区最小。用于接地短路的功率方向继电器应接零序电流和零序电压，并特别注意正确接线方式是+3夒0和-3妧0(零序电压反极性)。并非所有多侧电源的保护都要装功率方向继电器。母线两侧的两相邻保护，其时限大者不必装设方向元件。若反向短路电流大于起动元件的动作值，也不需装设方向元件。
