Operation &amp; Maintenance Analysis and Fault Handling of AC Filter Capacitor in Converter Station

Gu, Zhipeng; Liang, Weikang

doi:10.1109/aeeca52519.2021.9574248

Cited by 1 publication

(1 citation statement)

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“…(3) The current fence height of the AC filter in the converter station is 1.7 m, and the height of the filter fence can be increased moderately, or a detachable hard insulation protection network can be designed and installed around each layer of the capacitor of the AC filter capacitor tower to increase the ability to intercept floating objects and block the path of foreign matter falling into the capacitor tower [2,13].…”

Section: Discussionmentioning

confidence: 99%

Analysis of AC Filter Tripping Accident based on UHV Converter Station

Ai,

Bi,

et al. 2024

J. Phys.: Conf. Ser.

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An AC filter tripping accident occurred in a converter station of the North China Power Grid in 2019, which seriously affected the safe and stable operation of the power grid. In this paper, combined with the configuration of the AC filter in the converter station and the principle of capacitor unbalance protection, the tripping mechanism of the AC filter is explained. It is considered that the direct cause of the tripping of the AC filter is the short-circuit discharge phenomenon between the layers caused by the dead trees (grass) branches on the capacitor tower, which causes the instantaneous fault between the layers of the low-voltage capacitor, and finally leads to the action of the capacitor unbalance protection. From the perspective of operation and maintenance, some practical preventive measures are put forward, which will help to improve the safety of AC filter operation in the future, and then improve the reliability of DC transmission system, especially during the peak summer, peak winter and special power protection period, to ensure that there will be no fluctuation in DC load transmission and protect the safe and stable operation of power grid.

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Section: Discussionmentioning

confidence: 99%