Distribution network fault early warning method and system facing power distribution automation uncovered region

Abstract

The invention discloses a distribution network fault early warning method and system facing a power distribution automation uncovered region. The method comprises the steps of: acquiring primary network frame information of a power distribution network in the region from a dispatching automation system D5000 and a power utilization information management system; predicting a theoretical load current of a branch line and predicting a theoretical load current of a power supply point; carrying out differencing on a real-time load current of the branch line and the theoretical load current of thebranch line, carrying out differencing on a real-time load current of the power supply point and the theoretical load current of the power supply point, respectively comparing difference values to corresponding thresholds, and if the difference values exceed the thresholds, determining that the corresponding branch line or power supply point has a trip-out fault. According to the distribution network fault early warning method and system facing the power distribution automation uncovered region, which are provided by the invention, distribution transformation information in the dispatching automation system D5000 and a power utilization information acquisition system is utilized, the switch trip-out fault of the power distribution network is timely determined and positioning and warning are carried out, so that combined utilization and integration of resources are implemented.

Description

technical field [0001] The invention relates to the technical field of distribution network fault early warning, in particular to a distribution network fault early warning method and system for non-distribution automation coverage areas. Background technique [0002] With the continuous development of distribution network transformation, the reliability of 20 / 10kV distribution line equipment has been greatly enhanced, especially the operation reliability of 20 / 10kV distribution network trunk lines has been greatly improved, but some lines in the distribution network are due to old user equipment , poor selection, poor maintenance and other factors, the operation reliability is low. Therefore, the line tripping caused by the user equipment failure is the main reason for the tripping of the distribution network line fault. After the line fault trips, it is urgent to isolate the faulty branch line segment and restore the power supply of the non-faulty line segment. When no o...

AI Technical Summary

Problems solved by technology

However, the degree of distribution automation in some areas is still low, the online rate of distribution automation terminals is low, and the data reliability is poor, which cannot meet the requirements of dispatchers to quickly judge and deal with faults. Often after the distribution network switch trips, the distribution network dispatcher cannot grasp it in time. Makes fault isolation and repair difficult

If the distribution automation system is used to monitor all the distribution network equipment, many distribution terminals or on-site intelligent devices are required. The number of terminal nodes in a distribution automation system is quite large, which requires large investment, long construction period, and time-consuming , increasing the cost of early warning of distribution network faults

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