A Real-time Monitoring System for Earthquake Damage of UHV Converter Station

Abstract

The invention discloses a real-time monitoring system for earthquake damage of an ultra-high voltage converter station, comprising an acceleration sensor, a signal acquisition device and a signal analysis device; it is reasonably divided into four areas according to the functions and equipment characteristics of the converter station, which are: GIS And GIL circuit area, AC filter circuit area, converter valve hall and converter transformer circuit area, DC field circuit area. Acceleration sensors are arranged on key equipment in each area, and a signal acquisition device is set up in the area; after an earthquake occurs, the acceleration sensor will output the monitored ground motion acceleration response signal of the equipment to the corresponding signal acquisition device, and the signal acquisition device will collect The obtained acceleration response signal is output to the signal analysis device to identify the damage of each signal, without the need for comparison of the vibration response of the undamaged structure, to realize the preliminary assessment of the earthquake damage of the converter station equipment, which is beneficial to the UHV converter station The rapid repair work after the earthquake was launched.

Description

technical field [0001] The invention relates to the technical field of structural health monitoring, in particular to a real-time monitoring system for earthquake damage of equipment in UHV converter stations in lifeline projects. Background technique [0002] As an important part of the lifeline project, the UHV transmission project is closely related to the stable development of the social economy and the happiness index of the people's life. The southwestern regions where my country's energy-concentrated areas are located, such as the Qinghai-Tibet Plateau and western Yunnan-Guizhou-Sichuan, are also earthquake-prone areas, and the substation facilities are extremely vulnerable to damage under the action of earthquakes. On the one hand, since the natural vibration frequency of facilities is mostly in the range of 1Hz-10Hz, which is close to the excellent frequency of seismic waves, resonance is very easy to occur when an earthquake occurs; on the other hand, power equipme...

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Problems solved by technology

[0003] Considering that the equipment in the converter station is connected together by the bus bar, and some of the equipment is installed at a certain height, the size of the equipment is large, and the center of gravity is high. The coupling system formed by the bus bar and the equipment is very different from the seismic response of the single equipment. Under strong earthquakes, due to the mutual dynamic effect, the earthquake response may be amplified, resulting in damage to the equipment structure, affecting the safe operation of the power system, and causing huge economic losses.

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