Abstract:

During the operation of the power grid, network accessing tests may be made on protective relay devices of new substations everyday. The test data of the protective relay devices will be sent to the fault information system of dispatcher and generate fault report, as they act in a real fault. For dispatching operators, only the real fault report will be notified and those fault reports generated by field tests need to be effectively screened and filtered by fault information system. Therefore, it is very important to identify these fault reports by effective approaches instead of by dispatch operators. Four practical methods for eliminating test data which are judging by maintenance mark, judging by adjacent interval information, judging by information in the same interval and judging by primary auxiliary information, are put forward according to the field operation experience.The software developed upon these judging methods has been applied in a  electric power dispatching company.Engineering practice shows that the power grid fault report recognition accuracy is greatly enhanced by the software.

Key words:

font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">test fault report, screening, false alarm, fault information system