It is a one-way directional control element and can discharge the compressed air in the system rapidly. 单向型方向控制元件,可将系统中工作过压缩空气快速排放。
The performance of negative sequence directional element widely used in conventional transmission line protection may be affected when it is used in the double transmission lines on the same tower. 由于同杆双回线自身的特殊性,使得在常规线路保护中有着广泛应用的负序方向元件的性能受到影响。
Research on Bangla Handwritten Numeral Recognition Using Directional Element Feature 基于DEF的孟加拉文脱机手写数字识别研究
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
Handwritten Bangla Numerals Recognition Based on Directional Element Feature 基于方向线素特征的孟加拉手写数字识别
Analysis of the reason of pilot zero sequence directional protection mal-function and study of negative sequence directional element on parallel double-circuit lines 平行双回线路纵联零序方向误动原因分析及负序功率方向研究零序电哩向保护装置
The directional element of zero sequence power, as a judgment element, is made in accordance with the absolute value comparison principle and is widely applied in the direction protection of zero sequence current. 按绝对值比较原理构成的零序功率方向元件,在零序电流方向保护中应用极为广泛。
Adaptive Directional Element Based on Waveform Factor 基于波形系数的自适应方向元件
Exploration on Several Special Problems of New Type Directional Element for Positive-sequence Component of Faults 对新型正序故障分量方向元件几个特殊问题的探讨
Based upon the discussion on the principle of directional element for positive-sequence component of faults, this paper focusing several special problems about it, carries out the analysis and discussion, and puts forward new idea and views. 本文在讨论正序故障分量方向元件的原理基础上,针对其存在的几个特殊问题,进行了分析讨论,并提出了新的观点和看法。
In this thesis, the research of protection principle is used for reference, such as a sequence directional element based on compensating voltage, a high sensitive starting element based on three phase simultaneity sampling values, a novel fault phase selector. 在保护方案设计中,借鉴和应用了近年来在保护原理研究中的新成果,主要包括基于序补偿电压模值比较的方向元件、三相电流综合突变量启动元件、新型故障选相元件等。
A Novel Zero Sequence Directional Element Based on Fault Type 基于故障类型的零序方向元件
Solution of directional element based on general digital camera 基于普通数码相机定向元素的解算
Action Behavior Analysis on Directional Element of Line Protection under Multiple Faults 复故障情况下线路保护中方向元件动作行为分析
While, the way using directional element not identifying TA saturation, to TA saturation problem is an innovation in this paper. 其中,利用方向元件省去TA饱和识别的TA饱和处理方法是本文的一个创新。
In this paper, the performance of directional element when PT secondary circuit open is studied. 研究了PT断线情况下的方向元件性能。
And the lofting principles and methods for form directional line as well as those for positions of the workpiece are also described Handwritten Chinese characters recognizing based on fuzzy directional line element feature 着重讨论工件坐标系的确定方法及与测量坐标系之间的变换原理,说明工件上点位(如螺孔)和模板定向线放样原理及放样方法基于模糊方向线素特征的手写体汉字识别
The performance of directional element when PT secondary circuit open PT断线时方向元件的性能分析
Improvement on Zero Sequence Current Protection When Directional Element Fails to Operate During Earth Faults 接地故障零序方向元件拒动保护改进方案
The results of real time digital simulation ( RTDS) show that the proposed directional element can quickly and correctly determine the direction of faulty point under multiple faults with the same sensitivity as that under the single fault condition. RTDS(RealTimeDigitalSimulation)动模试验结果证明了所提出的方向元件能在复故障情况下快速、准确地判断出故障点方向,且具有与单一故障同样的灵敏度。
Currently available fast directional elements have some defects such as conservative and blind operation range when short-data-window algorithm is adopted. An adaptive directional element based on waveform factor is proposed in this paper to overcome defects above. 目前的快速方向元件普遍采用短数据窗算法,针对其动作范围的整定有一定的保守性与盲目性的缺陷,提出了基于波形系数的自适应方向元件。
Application of Directional Element for Power-frequency Variable at PC Protection 微机保护装置中工频变化量方向元件的应用
Analysis on the operating characteristic of phase to phase directional power element 相间功率方向元件动作行为分析
The action-behaviors of the zero-sequence directional element is uncertain; 零序方向元件的动作行为不确定;
A directional phase-selective element cooperated with the zero sequence reactance relay 配合于零序电抗继电器的方向性选相元件
Feature extraction that serves as the important basis of recognition extracts features of handwritten Chinese characters that are very stable and can describe the shape of characters. And the fuzzy directional line element feature extraction method, one of extracting feature approaches, is used widely. 特征提取主要是提取手写体汉字中较为稳定且能反映汉字形状的基本特征作为识别的重要依据,其中模糊方向线素法是广泛采用的一种提取汉字特征的方法。
Character feature is divided into structural features and statistical features, structural characteristics including skeleton features, contour features and directional line element features; statistical characteristics of grid characteristics, peripheral features and complexity index characteristics. 通常主要用结构特征和统计特征来区分字符特征,结构特征主要是体现字符结构构成的骨架特征、轮廓特征和方向线素特征等;统计特征主要包括网格特征、外围特征及复杂指数特征等。
Finally, with the study on simulation of interphase short circuit fault of induction motor on independent power system, the paper proposes a scheme of time overcurrent protection which has power directional element. 最后通过对独立电力系统中异步电动机相间短路故障的仿真研究,提出了加装功率方向元件的定时限过电流保护的配置方案。
At last, Tibetan feature extraction, selection and identification are done based on modified rough in this paper and some experimentals of Tibetan character recognition are conducted, and are compared with the directional line element method. 最后,文中用改进的粗网格法对藏文进行特征提取、选择和识别,进行了多次藏文字符的识别实验,并与方向线素法做了比较。
Scheme of transformer integrated protection based on directional element is proposed in this article to solve this problem. 针对此问题设计了基于方向元件的变压器综合保护方案。