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VSC-HVDC converter station fault diagnosis system and method

A technology of VSC-HVDC and fault diagnosis system, which is applied in the field of high-voltage DC fault diagnosis. It can solve problems affecting system operation and difficulty in extracting signal features, and achieve the effects of ensuring equipment operation, intuitive operation status, and reducing equipment downtime

Pending Publication Date: 2022-06-07
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The converter station is the core part of the VSC-HVDC system. Once a failure occurs, it will affect the normal operation of the entire system and even cause serious accidents
The short-circuit fault is a typical fault in the converter station. Due to the influence of the carrier noise generated by the converter, it is difficult to extract the signal features.

Method used

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  • VSC-HVDC converter station fault diagnosis system and method
  • VSC-HVDC converter station fault diagnosis system and method
  • VSC-HVDC converter station fault diagnosis system and method

Examples

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Effect test

Embodiment 1

[0024] A kind of VSC-HVDC converter station fault diagnosis system based on CEEMDAN arrangement entropy and KELM, such as Figure 1 Shown, including signal acquisition module, wireless WIFI acquisition module and PC-side analysis module;

[0025] The signal acquisition module comprises a VSC-HVDC converter station, a current sensor, and an STM32F103C8T6 chip; Acquire electrical signals by encapsulating a current sensor on the busbar of a VSC-HVDC converter-based converter based on a voltage source converter;

[0026] The wireless WIFI transmission module comprises ESP8266 and a wireless router, the current signal is transmitted to the STM32F103C8T6 chip through the SPI interface, the STM32F103C8T6 chip is connected to the ESP8266 UART serial port to achieve wireless data transmission;

[0027] The PC analysis module, using CEEMDAN permutation entropy and KELM method to establish a VSC-HVDC converter station fault diagnosis model, in order to evaluate the vsC-HVDC converter station ...

Embodiment 2

[0030] Method for using VSC-HVDC converter station fault diagnosis system based on CEEMDAN arrangement entropy and KELM, including the following steps, such as Figure 2 As shown:

[0031]S1: Signal acquisition: electrical signal acquisition is obtained by a current sensor embedded in the busbar of the VSC-HVDC converter station based on the voltage source converter;

[0032] S2: Signal transmission: the acquired signal is transmitted to the PC through the WIFI module;

[0033] S3: Feature extraction: CEEMDAN decomposition of the acquired electrical signal obtains the modal component, and calculates the correlation coefficient between the modal component and the original signal, and calculates the permutation entropy value of the modal components with high correlation coefficient to form a feature sample set;

[0034] S4: State recognition: The feature sample set obtained by feature extraction is input into the KELM fault diagnosis model for state recognition;

[0035] KELM has hig...

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Abstract

The invention discloses a VSC-HVDC converter station fault diagnosis system and method. The system comprises a signal acquisition module, a wireless WIFI acquisition module and a PC end analysis module. The signal acquisition module is composed of a current sensor and an STM32F103C8T6 chip; the wireless WIFI acquisition module is composed of an ESP8266 and a wireless router; according to the method, firstly, a current sensor of a signal acquisition module is used for acquiring a bus electric signal of a novel high-voltage direct-current power transmission (VSC-HVDC) converter station, the current signal is transmitted to an STM32F103C8T6 chip through an SPI (Serial Peripheral Interface) and then is uploaded to a PC (Personal Computer) terminal through WIFI (Wireless Fidelity), a VSC-HVDC converter station fault diagnosis model is established through CEEMDAN permutation entropy and KELM, and the running state of the VSC-HVDC converter station is evaluated. The technical scheme provided by the invention has the advantages of high safety, good transmission performance, high accuracy and the like, the operation state of the converter station can be quickly identified, reliable equipment operation information is provided for maintenance personnel in time, normal operation of equipment is ensured, and the maintenance cost is reduced.

Description

Technical field [0001] The present invention belongs to the field of high voltage DC fault diagnosis technology, specifically relates to a KIND of VSC-HVDC converter station fault diagnosis system and method based on CEEMDAN arrangement entropy and KELM. Background [0002] VSC-HVDC system has been widely used in long-distance large-capacity transmission, cross-regional grid asynchronous interconnection, large-scale centralized transmission of new energy and other applications, which mainly include converter station and line two parts, with high transmission voltage, large transmission capacity, stable and reliable transmission, can effectively eliminate the fault in transmission and other advantages. The converter station is the core part of the VSC-HVDC system, and once it fails, it will affect the normal operation of the entire system and even cause serious accidents. A short-circuit fault is a typical fault of a converter station that is difficult to extract due to the influe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00H02J3/36H02J13/00
CPCG01R31/00H02J3/36H02J13/00002H02J13/00026Y04S40/126
Inventor 范玉刚李瑞
Owner KUNMING UNIV OF SCI & TECH
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