An auxiliary decision-making method for single-phase grounding of main distribution network based on multi-source data

Abstract

The invention discloses an auxiliary decision-making method for single-phase grounding of main distribution network based on multi-source data, which includes obtaining single-phase grounding start criterion; Phase-to-ground starting criterion; when it is determined that the single-phase grounding starting criterion is met, and the single-phase grounding starting criterion has been met within the set time range, the bus is judged to be single-phase grounded; when it is judged that the bus is single-phase grounded, the And the device corresponding to the feeder connected to the bus does not have the function of recording wave, then use the main network data to screen out the suspicious grounding lines; The pulling strategy table forms a control strategy table, and manual or automatic pulling is completed based on the control strategy table. The invention provides powerful help for dispatching and monitoring personnel to quickly obtain single-phase grounding busbars, single-phase grounding lines, and single-phase grounding feeder segments, and dispatching personnel can immediately take measures to isolate faults or test pulls according to the auxiliary decision of single-phase grounding pull-out. .

Description

technical field [0001] The invention belongs to the field of comprehensively processing ground faults of power systems by comprehensive utilization of various types of information by a dispatching / distribution network master station, and in particular relates to a main distribution network single-phase grounding auxiliary decision-making method based on multi-source data. Background technique [0002] After the single-phase grounding occurs in the low-current grounding system, the fault phase-to-ground voltage decreases, and the non-fault two-phase phase voltage increases, but the line voltage is still symmetrical, so it does not affect the continuous power supply to the user, and the system can run for 1 to 2 hours. However, if the power grid runs for a long time when a single-phase-to-ground fault occurs, the voltage of the non-faulted two-phase to ground increases It may cause the weak link of the insulation to be broken down and develop into a phase-to-phase short circu...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of differences in single-phase grounding positioning for different data sources, the present invention proposes an auxiliary decision-making method for single-phase grounding of the main distribution network based on multi-source data, which can perform scene-based data on the main and distribution secondary systems The flexible assembly realizes the logical AND, OR, and non-configuration of the single-phase grounding starting criterion. It has the function of sending a single-phase grounding alarm after the single-phase grounding starting criterion is met, and can provide line selection and segment selection functions according to the source of the data. , providing pull strategy and control strategy, one-button remote control or closed-loop control

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