A device and method for fault identification of vsc-hvdc converter station based on vmd-elm

Abstract

The invention discloses a VMD-ELM-based fault identification device and method for a VSC-HVDC converter station. The device includes a signal acquisition module, a data processing module, a state identification module and an alarm module. The present invention is proposed aiming at the particularity of the electric signal of the converter station in the VSC-HVDC system; by using the fault diagnosis device, the real-time status monitoring of the operation of the converter station can be realized, the operating status of the equipment can be reflected quickly and intuitively, and timely report to the Equipment maintenance personnel provide reliable equipment operation information to effectively ensure equipment operation, thereby reducing equipment downtime, planned maintenance time and unplanned maintenance time.

Description

technical field [0001] The invention relates to a VMD-ELM-based VSC-HVDC converter station fault identification device and method, and belongs to the technical field of high-voltage direct current transmission diagnosis. Background technique [0002] The new high-voltage direct current transmission technology (VSC-HVDC) has been widely used in long-distance high-power transmission, submarine cable power transmission, asynchronous connection between AC systems with different rated frequencies or the same rated frequency, etc. The system mainly includes two parts, the converter station and the line. When the same power is transmitted, it has the advantages of low line cost and small line active power loss. However, how to ensure the safety and stability of the system operation is an urgent problem to be solved. [0003] The converter station is the core part of the VSC-HVDC system. The standardization and miniaturization of the converter station, the overall design and the pos...

AI Technical Summary

Problems solved by technology

Once the converter station fails, it will affect the normal operation of the entire system and even cause serious accidents

The converter is the key equipment in the converter station of the VSC-HVDC system. The short-circuit fault is a typical fault. Due to the influence of the carrier noise generated by the converter, it is difficult to extract the signal features, and the consequences of the fault are extremely serious.

[0004] However, the fault signal of the converter station is usually interfered by other signals, so it is difficult to extract and identify. At present, the BP neural network method is commonly used for fault classification and identification, but there are problems of low recognition accuracy and slow recognition speed.

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