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| 适用于数字化变电站的继电保护数据处理新方法 | |
| 引用本文： | 刘益青,高厚磊,高伟聪.适用于数字化变电站的继电保护数据处理新方法[J].电力系统自动化,2011,35(15):68-72. |
| 作者姓名： | 刘益青 高厚磊 高伟聪 |
| 作者单位： | 1. 山东大学电气工程学院,山东省济南市250061 积成电子股份有限公司,山东省济南市250100 2. 山东大学电气工程学院,山东省济南市,250061 3. 山东外事翻译职业学院,山东省济南市,250100 |
| 摘 要： | 在分析数字化变电站中数据处理基本要求的基础上,提出一种继电保护数据处理新方法。新方法直接对合并单元传输来的等间隔采样数据进行傅里叶变换,然后按照实测频率对傅里叶变换得到的正余弦项进行修正,从而得到输入信号的真实有效值和相位。新方法采用了相位偏移比较的周期法测频,可实现对信号频率的实时高精度测量;不需要进行数据插值和采样... |
| 关 键 词： | 数字化变电站 智能电子设备 电子式互感器 合并单元 等间隔采样 |
| 收稿时间： | 2010/9/28 0:00:00 |
| 修稿时间： | 7/1/2011 12:00:00 AM |
A Novel Data Processing Approach to Relay Protection in Digital Substation |
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| LIU Yiqing,GAO Houlei,GAO Weicong.A Novel Data Processing Approach to Relay Protection in Digital Substation[J].Automation of Electric Power Systems,2011,35(15):68-72. | |
| Authors: | LIU Yiqing GAO Houlei GAO Weicong |
| Affiliation: | 1.Shandong University,Jinan 250061,China; 2.Integrated Electronic Systems Lab Co.Ltd.,Jinan 250100,China; 3.Shandong International University,Jinan 250100,China) |
| Abstract: | A novel approach to data processing for relay protection is proposed based on analysis of basic requirements of data processing in digital substation.The new scheme involves three major steps,applying the Fourier algorithm immediately to equal-interval sampling data from merging unit,amending the sine/cosine items in accordance with the real-time frequency,and finally acquiring the signal’s true root mean square value and phase.The new scheme not only obtains high precision frequency with the phase-shift-cycle measurement algorithm,but also adapts to phasor based protection without using interpolation or sampling rate conversion.The concrete implementation of novel data processing approach and related issues(e.g.how to deal with startup with sampled values) are given in detail.The feasibility and validity of proposed approach have been verified with ATP based simulation. |
| Keywords: | digital substation intelligent electronic device(IED) electronic instrument transformer merging unit equal-interval sampling |
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