Reflection Interference Elimination of Protection Platen Status Recognition in UHV DC Converter Station

Abstract

In response to the reflection interference problem in the pressure plate state monitoring of the extra high voltage DC converter screen, a network based on multi-stage connection and adaptive region attention is proposed. First, an interactive multi-level connection structure is proposed to give different ratios to different levels of elements so as to solve the background detail problem of the multi-scale features and restore the reflection images. Secondly, after the channel-level focal layer is introduced to the multi-stage connection, useful network channels are focused to solve adaptive adjustment problems of channel features in multi-stage connection process. Finally, to solve the problems such as the non-natural reflected light, dispersed spot distribution and large light intensity in the monitor room of the station, a wide regional non-local block is proposed, in which the feature map is divided into wide meshes so that the reflected light is evenly distributed to capture long-term spatial dependencies between long-range pixels. After experimental verification is carried out against the public data set and the monitored image data set of extra high voltage DC converter station, the results prove that the network can efficiently remove reflection interference in the images, greatly enhancing the effect of the pressure plate state monitoring.