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浙江大学学报(工学版)
J4  2013, Vol. 47 Issue (8): 1411-1417    DOI: 10.3785/j.issn.1008-973X.2013.08.013
电气工程     
基于暂态主频实时估算的快速距离保护
张波, 何奔腾, 王慧芳
浙江大学 电气工程学院,浙江 杭州 310027
Fast distance protection based on real-time estimation of transient main frequency
ZHANG Bo, HE Ben-teng, WANG Hui-fang
College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China
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摘要：

为提高继电保护的动作性能,针对故障时高频噪声分量中暂态主频分量占主导的特点,提出一种实时估算暂态主频的方法,并应用于主频模型的最小二乘算法；根据算法模型中预设暂态主频与实际暂态主频的正负误差导致算法误差大致呈现符号相反的特性,提出一种新的自适应距离保护方案,该方案采用对多组暂态主频模型算法结果相与构成保护输出.仿真结果表明,该方案能够有效地降低区外故障超越程度,提高距离保护范围,同时能够在区内故障时提高保护动作速度.
关键词： 特高压;  最小二乘算法;  暂态主频;  算法模型;  距离保护    
Abstract:

The component of transient main frequency plays a leading role in the high frequency noises during the fault. To improve operating performance of relay protection, a real-time estimation method of transient main frequency was put forward, and applied to the least square algorithm with model of main frequency. The phenomenon was obtained that the positive and negative error between true transient main frequency and the presetting one in the algorithm model cause the algorithm error sign approximately inverse. A new adaptive distance protection scheme was proposed by making results of several transient main frequency model algorithms composing AND gate as the protection output. Simulation results indicate that this scheme can effectively minish overreach range for external faults and increace the reach of distance protection. Furthermore,it can quicken the operating speed of protection for internal faults.
Key words: Ultra-High Voltage    least square algorithm    transient main frequency    algorithm model;distance protection
出版日期: 2013-09-05
:  TM 77  
通讯作者: 何奔腾，男，教授，博导.     E-mail: hebt@zju.edu.cn
作者简介: 张波(1983—)，男，博士生，主要从事电力系统继电保护的研究.E-mail: zjuee108@gmail.com
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张波, 何奔腾, 王慧芳. 基于暂态主频实时估算的快速距离保护[J]. J4, 2013, 47(8): 1411-1417.

ZHANG Bo, HE Ben-teng, WANG Hui-fang. Fast distance protection based on real-time estimation of transient main frequency. J4, 2013, 47(8): 1411-1417.

链接本文:

http://www.zjujournals.com/xueshu/eng/CN/10.3785/j.issn.1008-973X.2013.08.013    或    http://www.zjujournals.com/xueshu/eng/CN/Y2013/V47/I8/1411

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