OLTC vibration comprehensive diagnosis alarm strategy and system

Abstract

The invention discloses an OLTC vibration comprehensive diagnosis alarm strategy and system. The strategy comprises the following steps: setting a vibration characteristic value standard sample, a vibration envelope correlation standard sample and vibration energy proportion standard sample data of an OLTC; the method comprises the following steps: acquiring a vibration signal during switching of an OLTC switch through a vibration acceleration sensor, and obtaining vibration characteristic value real-time data, vibration envelope correlation real-time data and vibration energy proportion real-time data of the OLTC through calculation; calculating a vibration characteristic value alarm coefficient, a vibration envelope correlation alarm coefficient and a vibration energy ratio alarm coefficient, and diagnosing whether the vibration characteristic value, the vibration envelope correlation and the vibration energy ratio are abnormal according to the vibration characteristic value alarm coefficient, the vibration envelope correlation alarm coefficient and the vibration energy ratio alarm coefficient; and according to the diagnosis results of the vibration characteristic value, the vibration envelope correlation and the vibration energy ratio, carrying out vibration comprehensive abnormity diagnosis, and carrying out vibration fault degree comprehensive diagnosis in combination with each alarm coefficient.

Description

technical field [0001] The invention relates to the technical field of power equipment monitoring, in particular to an OLTC vibration comprehensive diagnosis and alarm strategy and system. Background technique [0002] The On-load Tap Changer (OLTC) is a key component of the on-load tap changer, and plays an important role in the power system, such as stabilizing the grid voltage, regulating reactive power flow, and increasing the flexibility of the grid. After the mechanical failure of the on-load tap-changer, it often causes serious transformer accidents and power outages, resulting in significant social and economic losses. Therefore, the detection and diagnosis of the on-load tap-changer fault is of great significance to ensure the safety of the power grid and the reliability of power supply. . [0003] There are many methods to realize OLTC fault diagnosis, including time-frequency domain eigenvalue diagnosis based on vibration signal, time-domain envelope correlation ...

AI Technical Summary

Problems solved by technology

After the mechanical failure of the on-load tap-changer, it will often cause serious transformer accidents and power outages, resulting in major social and economic losses. Therefore, the detection and diagnosis of on-load tap-changer failures are of great significance to ensure the safety of the power grid and the reliability of power supply

[0003] There are many methods for OLTC fault diagnosis, including time-frequency domain eigenvalue diagnosis based on vibration signals, time-domain envelope correlation diagnosis based on vibration signals, and frequency-domain energy ratio diagnosis based on vibration signals. , these diagnostic methods are used independently, so when evaluating the operating status of OLTC, they are usually not comprehensive and accurate, and there are certain disadvantages

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