Study on the Electrical Power Fault Recorder Integrated Analysis&Application System

Abstract

This paper introduces an electric power fault recorder integrated analyzing & application system, which interconnects digital fault recorders of several substations and power houses that are widespread in Jiangxi province of China and has the fault information gathered, processed, transmitted, shared and utilized automatically and effectively. A method based on the Newton iterative algorithm for precise fault data analysis was introduced into this system. In addition to realize the conventional analysis functions that are provided by similar systems, this system realizes extended functions of flexible protection action judgment. Besides, functions of formula editor and protective relaying testing simulation have been added and provide a novel approach for the comprehensive fault analysis applications. This system is now running steadily at the dispatch center of Jiangxi Province. The good results obtained reveal the superiority and effectiveness of this system.

The research on a new fault wave recording device in generator-transformer units

“…Over excitation If over excitation occurs, / z U f D > , / U f is taken as startup judgment of the over excitation. [5] The fault wave recorder is to monitor various faults by detecting, operating and judging the discrete sample value. Therefore, one of the basic questions of the fault wave recorder design is to find appropriate and discrete operating methods according to common detecting ways of the fault wave recording device, so the precision of the calculating result can meet engineering demands and the calculating time should be short as much as possible.…”

Design of Power Fault Recorder Based on Embedded Systems

“…The entire system can be designed for an improved network structure, as shown in Fig. 1 [2].In this system, digital fault recorder(DFR), installed at each station, was communicated with dispatching centre through their own communication modules. Communication in two ways: the connection of power system microwave telephone network dial-up connection; the connection of power system special digital network.…”