考虑直流干扰条件下的变电站二次直流系统故障检测新算法

Abstract
Figure/Table
References
Related Citation (2)

Download: PDF (14084 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Linear sinusoidal tractor for specific frequency signals with good amplitude and phase frequency characteristics can be used in detecting DC circuit grounding fault. The method of injecting signal for DC circuit grounding fault affected by branch distributed capacitance. A new method based on improved discrete LST for DC circuit grounding fault in station was presented in this paper. Mathematical model for the equivalent circuit of detection system was given. By rotation transformation of the algorithm for LST, the resistance current and equivalent capacitive current value of alternating current signal can be directly obtained. For a first-order differential treatment, the DC component can be filtered out, adjusting the tractor parameters, specific frequency AC signal under testing separated, according to the grounding resistance and the equivalent capacitance is calculated to give each branch grounding resistance and capacitance, The simulation results show that the algorithm can overcome the effects of stray capacitance and accurately detects grounding fault.

Key words： linear sinusoidal tractor DC circuit grounding fault first-order differential rotation transformation

Published: 21 March 2017

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Zhu Deliang
	Su Jianming

Cite this article:

Zhu Deliang,Su Jianming. The New Method of Detecting DC Circuit Grounding Fault in Power Station Considering DC Interference[J]. Electrical Engineering, 2017, 18(3): 97-101.

URL:

http://dqjs.cesmedia.cn/EN/Y2017/V18/I3/97

[1] 黄海宏, 陈伟, 王海欣. 多直流支路接地检测方法的研究[J]. 电子测量与仪器学报, 2011, 25(9): 793- 798.
[2] 王广柱, 魏殿杰. 直流系统绝缘自动监测仪研制[J]. 电子测量与仪器学报, 1998, 12(2): 51-54.
[3] 孙鸣, 马娟. 直流系统微机型绝缘监测装置电阻选择[J]. 电力系统保护与控制, 2011, 39(4): 128-131.
[4] 李冬辉, 王金凤, 史临潼. 分形在直流系统故障检测中的应用[J]. 电力系统自动化, 2005, 29(21): 53-56, 84.
[5] 李冬辉, 王波, 马跃贤. 基于小波熵神经网络的直流系统环网接地故障检测[J]. 电力自动化设备, 2008, 28(3): 51-54.
[6] 薛蕙, 杨仁刚. 基于FFT的高精度谐波检测算法[J]. 中国电机工程学报, 2002, 22(12): 106-110.
[7] 张大波, 刘志刚, 张亚军. 复小波研究现状及其在电力系统中的应用进展[J]. 电力系统自动化, 2006,
30(17): 97-104.
[8] Karimi-Ghartemani M, Ziarani A K. A nonlinear time-frequencyanalysis method[J]. IEEE Transactions on Signal Processing: a Publication of the IEEE Signal Processing Society, 2004, 52(6): 1585-1595.
[9] Karimi-Ghartemanim K, Ziarani A K. Performance characterization ofa nonlinear system as both an adaptive notch filter and a phase-locked loop[J]. International Journal of Adaptive Control Signal Process, 2004, 18(1): 23-53.
[10] 潘学萍, 扈卫卫, 尚霏. 多信号模态参数识别的小波方法[J]. 电力自动化设备, 2013, 33(5): 31-36.
[11] 李冬辉, 史临潼. 基于小波变换的直流系统接地故障检测中小波基的选择与比较[J]. 电力系统及其自动化学报, 2004, 16(6): 48-51, 87.
[12] 储昭碧, 张崇巍, 冯小英. 一种可调带宽的线性电力信号实时分析新算法[J]. 中国电机工程学报, 2009, 29(1): 99.
[13] 储昭碧. 基于自适应陷波滤波器的电力信号时频分析[D]. 合肥: 合肥工业大学, 2009.
[14] 王洪涛, 李天云, 刘辉军. 基于二维线性跟踪器的二次系统直流接地故障检测新方法[J]. 电网技术, 2012, 36(5): 204-208.