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Research on Key Technologies of Digital Distributed Fault Recorder

Author: ChenZuoLin
Tutor: ZhangGuoQing
School: Harbin Institute of Technology
Course: Electrical Engineering
Keywords: The digitized distributed fault recorder IEC61850-9-1 Standard The soft measuring frequency algorithm Fault Location Algorithm
CLC: TM774
Type: Master's thesis
Year: 2009
Downloads: 88
Quote: 2
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Abstract

Power system fault is an important basis for evaluation of protective actions behavior and the nature of the equipment malfunction and cause performance fault recorder for ensuring the safety of power system operation and has played an important role in improving power quality. The rapid development of the power system fault recorder put forward higher requirements, the promotion of the development of digital substation digitized distributed fault recorder, it belongs to the interval layer of digital substation equipment, fault recorders research priorities and direction of development. Distributed fault recorder, digitized this paper, the overall design ideas and modules, and described the function of each module of the hardware and software design of distributed fault recorder digitized. Distributed fault recorder key research digitized three key technologies, respectively is the digitized distributed fault recorder communication technology, fault recorder start frequency measurement technology and fault data analysis techniques, fault location technology. Distributed fault recorder digitization of communication between the communication technologies focus on merging units and fault recorder, digital substation process layer and a spacer layer communication, this article is using Ethernet communication technology, according to the IEC61850-9-1 communication standards to achieve communication, packet capture experiments using Ethereal and winpcap software, preparation of Labview program displays the message data waveform caught merged cells to achieve a combined unit and digitized communication of distributed fault recorder. Fault recorder start technology in soft measuring frequency algorithm three times improvement in traditional Fourier frequency measurement algorithm based on high-precision frequency measurement algorithm proposed consider the harmonic components, and by Matlab simulation algorithm The accuracy of the algorithm is better able to suppress harmonic components and frequency fluctuation frequency measurement algorithm, calculation accuracy, the principle is simple, practical. Fault location algorithm failure data analysis techniques were studied, accurate fault distance, a high voltage power line routes compensation based on artificial neural network (ANN) simulation to verify the accuracy of the algorithm using Matlab / Simulink programming , the algorithm retains the characteristics of a single-ended fault location algorithm is simple in principle, lower costs from system communication technology constraints, taking into account the impact of the transition resistance and distributed capacitance, to overcome the traditional fault location algorithm via high-impedance ground fault Japan ignored distributed capacitance caused by the fault location is not accurate when ranging errors shortcomings.

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system protection > Protection devices
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