GIS 局部放电光学传感器仿真设计与试验研究

在气体绝缘开关设备(GIS)的光学局部放电检测中，光学传感器是检测系统的核心部件。该文针对导光柱光学局部放电传感器的设计开展了仿真和实验研究。首先，基于TracePro仿真软件，对导光柱的前置微结构和长度进行设计，提出了一种用于GIS局部放电检测的导光柱光学传感器。随后，搭建GIS光学局部放电实验平台，研究了不同前置微结构和长度的导光柱的实际检测效果。仿真与实验结果均表明：前置微结构为凹锥，长度与罐体内壁平齐的导光柱传感效果较好。仿真与实验结果一致，证明了设计的可行性和仿真模型的正确性。最后，在该仿真模型中设置了多个探测面和探测点，观察并分析了各探测面的总光辐射度分布图和各探测点的光辐射度值。不同探测点接收的光辐射度值与部件遮挡以及直射光强弱有关。以放电源y-115为例，P1探测面上的光斑集中在150°～210°附近，P2探测面上的最优探测点主要位于在30°和330°附近。研究成果将为GIS光学局部放电传感器的研制提供参考依据。

Simulation design and experimental study of GIS partial discharge optical sensor

The optical sensor is the core part of the optical partial discharge (PD) detection system in gas insulated switchgear (GIS). In this article, simulation and experiment studies are implemented for the design of optical PD sensors based on the light guide rod. Firstly, based on the TracePro simulation software, the front microstructure and length of the light guide rod are designed, and an optical sensor for GIS PD detection is proposed. Then, the GIS optical PD experimental platform is established to study the actual PD detection effects of different front microstructures and lengths. Both the simulation and experiment results show that the light guide rod with its front microstructure being concave cone shape and the length being as long as the inner wall of the tank has better detection effect. The consistence between the simulation and experiment results demonstrates the feasibility of the design and the correctness of the simulation model. Finally, several detection surfaces and detection points are set up in this simulation model, and the total irradiance maps of each detection surface and the light irradiance value of each detection point are observed and analyzed. The light irradiance values received by different detection points are related to component occlusion and the intensity of direct ray. Taking the y-115 PD source as an example, the light spots on the P1 detection surface are concentrated around 150° to 210°, while the optimal detection points on the P2 detection surface are mainly located around 30° and 330°. The research results provide some basis for the development of optical PD sensors in GIS.