It is essential to distinguish excitation inrush from fault current in transformer differential protection.
变压器差动保护的关键问题是判别变压器差动电流是励磁涌流还是故障电流。
The new approach, which checks differential protection connection using electromotor starting current, is simple and reliable, and easy to be coordinated with installation schedule.
而利用电动机启动电流检验差动保护接线的新方法，简便可靠，容易与现场安装施工进度相协调。
Presents a realization method of digital line differential protection.
介绍了一种数字式线路差动保护的实现方法。
Protection devices is equipped with zero-sequence differential protection for the auto-transformer.
而保护装置针对自耦变压器，还配置了零序差动保护。
Distinguishing the transferring fault is one of difficulties for transformer differential protection.
转换性故障的准确识别是变压器差动保护亟待解决的难题之一。
It largely resolves the traditional problems of current differential protection of transmission lines.
它以其独特的保护动作特性解决了线路电流差动保护存在的几个缺陷。
Setting calculation method of line differential protection and calculation examples are given as well.
最后结合实例总结了相关保护定值的整定计算方法。
In practical running, the differential protection of transformer may happen to be tripped in non fault.
实际运行中，变压器差动保护可能在非故障的情况下发生误动。
A zero-sequence differential protection for transformer is discussed in scheme design and protective logic.
从保护方案设计和保护逻辑两方面详细论述了一种新型的变压器零序差动保护方案。
The zero-sequence differential protection ought to be added at the star winding of extra-high voltage transformer.
接线绕组的超高压变压器应增设零序差动保护。
In course of motor starting after no-voltage bus, a malfunction fault of motor differential protection was analyzed.
分析了一起母线失电后快切装置动作时电动机起动过程中差动保护的误动事故。
Delay time and synchronous technology which are the key technology of optical differential protection are introduced.
本文对光纤差动保护的关键技术——光纤传输的延时和同步技术进行了阐述。
The Characteristic of middle impedance relay was elaborated, as an example of bus differential protection of RADSS type.
以RADSS型母线差动保护为例，阐述了中阻抗型差动继电器的原理特点。
The main development trend of high voltage transmission line's protection is the line fiber optical differential protection.
光纤电流差动保护是高压线路主保护的发展趋势。
It is suggested that special over-excitation restraint function in the transformer differential protection is not necessary.
论文根据数字保护的智能特点提出用多条件涌流制动判据来判别变压器的涌流状态新方法。
However, current transformer (ct) saturation is still affecting the reliability of transmission line differential protection.
然而电流互感器(CT)饱和会影响输电线路电流差动保护的可靠动作。
Sampling value differential protection can be adopted as main protection for motor when it works in frequency-conversion mode.
同时，针对变频运行时电动机主保护缺失问题，提出采用采样值差动保护作为变频电动机主保护的解决方案。
The TA saturation has always been the main problem to degrade the reliability of the differential protection of power transformer.
TA饱和一直是影响变压器差动保护可靠性的重要原因。
So far, the core problem of transformer differential protection is still how to precisely identify the magnetizing inrush current.
迄今，变压器差动保护的核心问题仍然是如何准确识别励磁涌流。
This paper presents a fiber communication scheme applied to the current differential protection of the high voltage transmission line.
介绍一种适用于高压线路光纤纵差保护的通信方案。
The wiring correctness of differential protection current loop can be verified using phasor analyzing method and on load testing method.
差动保护电流回路接线是否正确，可通过相量分析法和带负荷检验法进行判断。
Fiber optical current differential protection is the main protections development trend of high and ultra high voltage transmission lines.
光纤电流差动保护是高压超高压线路主保护的发展趋势。
Reasons of wrong actions of longitudinal differential protection of LCD-3A line are analyzed. Solutions and theoretic criteria are proposed.
详细分析LCD - 3a线路纵差保护误动的原因，提出解决的措施及理论依据。
This method has been utilized in digital optical fiber current differential protection, and has proved to be simple, practical and reliable.
该方法物理意义明确，具有实现简单、可靠实用的特点，已经过保护装置的实际验证。
Dead Angle of differential currents is to be measured when realizing the transformer differential protection based on the dead Angle principle.
在间断角原理变压器差动保护中，需要测量差动电流导数波形的间断角。
In this paper the recursive least square algorithm is described and a practical recursive algorithm is used in differential protection of transformer.
本文在分析递推最小二乘算法的基础上，给出了在微机变压器差动保护中采用的实用递推算法。
This paper expatiates the principles, setting and application of high impedance differential protection in large motor with whole solid setting cases.
阐述了大型电动机高阻抗差动保护原理及整定原则和整定实例。
The restrained characteristic of ratio differential protection is analyzed. The equal block angle for the ratio differential protection is calculated.
分析了比率制动式发电机纵差保护的制动特性，计算了不同比率制动特性的定值曲线对应的等效闭锁角。
Based on the arithmetic of differential protection and simulation technique, this paper analyses the influence of the negative sequence to power system.
在结合微机差动保护装置算法及仿真建模的基础上，分析了负相序对差动保护的影响，并给出了相应的处理方法。
Based on the arithmetic of differential protection and simulation technique, this paper analyses the influence of the negative sequence to power system.
在结合微机差动保护装置算法及仿真建模的基础上，分析了负相序对差动保护的影响，并给出了相应的处理方法。
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