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数字式距离保护
相关语句
  digital distance protection
     Exploitation on Simulation Software for Digital Distance Protection
     数字式距离保护仿真软件的开发
短句来源
  “数字式距离保护”译为未确定词的双语例句
     Educational Use of EMTP for the Study of a Distance Relaying of Transmission Lines
     基于EMTP的数字式距离保护仿真教学
短句来源
  相似匹配句对
     Exploitation on Simulation Software for Digital Distance Protection
     数字式距离保护仿真软件的开发
短句来源
     Educational Use of EMTP for the Study of a Distance Relaying of Transmission Lines
     基于EMTP的数字式距离保护仿真教学
短句来源
     DISTANCE RELAY PROTECTION BASED ON ARTIFICIAL NEURAL NETWORK
     基于人工神经网络的距离保护
短句来源
     A Study of Non-Linear Distance Protection
     非线性距离保护的研究
短句来源
     Study of Residual Compensation for Earth-fault Digital Distance Protection
     数字式接地距离保护零序电流补偿的研究
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This paper introduces a new method to represent accurately the differential equation using discrete sampled .data. The introduced equation can be written in matrix form as: The advantage of the newly introduced method over the one in Ref. [1] is shown in the following table;

本文介绍了一种数字式距离保护的新原理。该原理建立于微分方程的基础上并可用矩阵表达为:式中不同时刻的电流采样值 不同时刻的电压采样值 弧度 采样时间间隔 每周波的采样点数 计算表明,该方法除了具有动作速度快的优点以外,还能有效地消除直流衰减分量对测量精度的影响。但是,该方法不能消除二次及三次谐波的影响,因此必须前置滤波器来进行配合。虽然该方法在不同的采样频率时均具有同等的计算精度,在实际应用中,则以8点/周或12点/周为宜。 本文还把此新方法与采用中心插值法求解微分方程的方法进行了比较。计算表明,前者比后者的运算精度高。同时还指出,当采用中心插值法时,采样频率最好不要少于16点/周。

This paper discusses the erros caused by using traditional residual compensation factor, i.e.real factor, in digital distance protection and the presents a new modified residual compensation method which can be simply implementted in a digital distance relay.The paper begins with the frequency response of comlex residual compensation factor. It can be seen from the frequency response that only one absolute value of complex factor under power frequency is taken the compedance measurement is introduced due to...

This paper discusses the erros caused by using traditional residual compensation factor, i.e.real factor, in digital distance protection and the presents a new modified residual compensation method which can be simply implementted in a digital distance relay.The paper begins with the frequency response of comlex residual compensation factor. It can be seen from the frequency response that only one absolute value of complex factor under power frequency is taken the compedance measurement is introduced due to this simplification.From the analysis of error, it can be seen that the error in impedance measurement is quite considerable and much affectted by variaty of operation conditions of power system due to using the real factor. It is also shown that overreach and underreach under double phase to ground fault condition are introduced due to using the real compensation factor as well.A modified residual compensation current is derived in frequency domain by using z transform technique. From the results of computer simulation, it can be concluded that the new modified method is superior to pervious one in several aspects such as unhan-cement of accuracy of measurement, elimilation of overreach and underreach ender double phase to ground fault and improvement of convergence of impedance measurement.

本文在分析了接地距离保护中常规零序电流补偿方法——实因子补偿法的线路阻抗测量误差的基础上,提出了一种新的适用于数字式距离保护的零序电流精确补偿法,即改进的零序电流补偿法。研究结果表明,该方法能显著地提高阻抗测量精度且可加速测量值的收敛。

The components and logic of digital protection are mainly realized by programming, it makes the protection device difficult to understand for users and it is also difficult to analyze the reason of maloperation and misoperation of the protection. The authors develop a simulation software for digital distance protection that can simulate the microcomputer based distance protection in the level of algorithm. This software can distinctly show the internal operating characteristcs of distance protection by visualized...

The components and logic of digital protection are mainly realized by programming, it makes the protection device difficult to understand for users and it is also difficult to analyze the reason of maloperation and misoperation of the protection. The authors develop a simulation software for digital distance protection that can simulate the microcomputer based distance protection in the level of algorithm. This software can distinctly show the internal operating characteristcs of distance protection by visualized measures and can offer powerful tool for professional analysis during the application process of the protection device. The authors overall consider the features to realize this software and make full use of Object Oriented Programming design method that is available for reference to the development of simulation software for other digital protection devices.

数字式保护的保护元件和逻辑主要由软件实现,这使得保护装置对用户不透明,也不易分析保护的误动或拒动原因。笔者开发了数字式距离保护仿真软件,对微机距离保护在算法层面上进行仿真,能充分利用可视化手段将距离保护的内部动作特性清晰地显示出来,为保护使用过程中的专业分析提供有力的工具。笔者全面考虑了保护仿真软件的实现特点,并充分利用了面向对象的程序设计方法,对其它数字式保护的仿真软件开发也有很好的借鉴意义。

 
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