Method for constructing transient state fault feather sample library of high-voltage direct-current power transmission system

Abstract

The invention discloses a method for constructing a transient state fault feather sample library of a high-voltage direct-current power transmission system. The method is developed on the bases of the RTDS simulation technology, the circuit simulation technology and a fingerprint feather algorithm for the specific high-voltage direct-current power transmission system, fault information is obtained through the method that practical faults, RTDS simulation faults and circuit simulation faults are collected on site, the fault information comprises SER warning information, protective action recording, fault recorder recording, a lightning arrester motion situation, a fault traveling wave monitoring result, polar line voltage and current data, the fingerprint algorithm is utilized to carry out feature extraction on the recording result and the waveform, the recording result and the waveform are stored in a database, and the transient state fault feather sample library is established. The transient state fault feather sample library is combined with the transient state fault recognition technology of the direct-current power transmission system to be applied, the fault analysis speed, the fault distinguishing speed and the fault exclusion speed can be substantially increased, and the transient state fault feather sample library has good popularization prospects.

Description

technical field [0001] The invention relates to a method for constructing a transient fault characteristic sample library of a high-voltage direct current transmission system, belonging to the technical field of high-voltage power transmission and transformation. Background technique [0002] With the rapid development of UHV DC transmission technology in China, the number of corresponding DC transmission projects is increasing, and the coordinated development of AC and DC transmission methods at different voltage levels will have a profound impact on the overvoltage transient characteristics of my country's power grid. Due to the wide variety of equipment in the converter station of the HVDC transmission system, the complex structure of the main circuit and the control and protection system, it is easy to cause the failure or outage of the DC system due to the threat of overvoltage on the insulation of the equipment, which seriously threatens the safe operation of the region...

AI Technical Summary

Problems solved by technology

[0004] At present, after a fault occurs in the HVDC transmission system, it mainly relies on human experience to judge the fault type, location and cause, and the judgment is based on the polar voltage and current monitored by the oscilloscope. There are few sources of information, and the judgment results are completely dependent on The experience of experts leads to a long time-consuming manual judgment, which makes it difficult to quickly identify faults and reproduce the fault process, and guide rapid troubleshooting and restoration of power transmission

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