Analysis of action fuzzy area of sampled value current differential protection;
采样值电流差动保护动作模糊区分析
Study on the current differential protection based on sampled values using fault component——Setting scheme;
基于故障分量的采样值电流差动保护研究——整定方法
Comparison and analysis of sampled value transmission specification 9-1 and 9-2 in IEC61850 standard;
IEC61850标准下采样值传输规范9-1、9-2的对比和分析
Based on the definition of three-phase imbalance degree,it calculates the positive and negative sequence components from AC sampling values and the ratio of their root mean squares to obtain the three-phase imbalance degree tested.
系统的算法实现主要采用三相不平衡度的定义,通过交流采样值分别求出正序分量和负序分量的采样值,正序分量和负序分量的均方根值的比值便是三相不平衡度。
It explains computing method and noticing questions of current,voltage and power,power factor and fault distance,etc,by applying the sine curve algorithm to simulate three sampling value.
阐述了用正弦曲线拟合三采样值计算电流、电压、功率(有功、无功)、功率因数、故障距离等电气量的计算方法以及应注意的问题。
Experiences in the development and application of sampling value differential protection are introduced.
扼要介绍了作者多年来在采样值差动保护的开发与应用中的一些体会与经验 ,对所遇到的一些主要问题作了相应的回答 ,对采样值差动的特殊能力作了一些介绍。
With the development of electronic transformers and the extensive utilization of the international standard IEC 61850, the sampled values technology in IED in the substation bay layer will be developed from A/D conversion of analog signals to Ethernet communication technology.
为了不改变传统保护、测控装置算法,分析了采用线性Lagrange插值原理对合并单元输入的采样值进行数据抽取的方法,进行了误差分析,并分析了谐波信号对插值算法的影响。
The paper presents a new wavelet transform based generator split phase transverse differential protection scheme with sampled values.
提出一种基于小波分析的发电机采样值裂相横差保护新方案。
This paper studies the differential protection of power apparatus by using the discrete sampled values instead of thephasors in conventional methods.
以采样值差动为研究对象 ,从综述的角度运用数学方法详细地分析了采样值差动的动作判据 ,判别数据窗的确定以及模糊区等具体问题 ,以期对采样值差动的理论基础做出总结。
Analysis of a new action criterion for current sample value differential protection;
采样值电流差动保护一种新动作判据的研究分析
Based on the research of principle of OFDM, we deeply analyze three kinds of synchronizations in OFDM systems: symbol synchronization, sample synchronization and frequency syn- chronization;and available resolutions for burst communications are presented too.
文章针对应用于突发系统中的OFDM的同步问题做了深入研究,分析了系统中主要存在的三种同步:符号同步、样值同步以及载波同步的原理,并给出了具体实现算法。