750kV变电站设备、绝缘子配套金具降噪研究  

Research on noise reduction for 750 kV substation equipment and supporting insulator ancillary fittings

作　　者：谢妍[1] 李牧[2] 方书博[2] 郑长征[1] 仰彩霞[1] 

机构地区：[1]武汉轻工大学电气与电子工程学院,湖北武汉430023 [2]国网电力科学研究院武汉南瑞有限责任公司输电事业部,湖北武汉430074

出　　处：《武汉轻工大学学报》2015年第3期64-70,共7页Journal of Wuhan Polytechnic University

摘　　要：750 kV变电站多采用敞开式布置方案,其电晕噪声源较多,分析计算模型复杂,降噪优化设计的难度较大。研究对1 300 m高海拔区的某一敞开式750 kV变电站的导线和设备金具进行了现场电晕及噪声测量,确定电晕放电点及分析噪声频谱特性;给出修正后的高海拔设备和导体配套金具最大表面起晕场强控制值;根据设备的实际安装位置对相关设备进行了电场仿真建模计算;根据场强控制要求,针对仿真中的明显高电场点进行了相关结构的选择或优化设计,使优化后设备电场值基本都在控制值以下;对应用优化结构金具后的750 kV变电站进行现场电晕放电和可听噪声实测,对比降噪效果,经实践检测,采用优化结构金具的变电站的电磁环境更优。研究表明,该金具降燥对750 kV变电站降噪效果明显,有较好的实际推广应用价值。750kV substations have most adopted the open layout scheme. Its corona noise sources are more,analysis calculation model is more complex,and noise optimization design is more difficult. This paper firstly has the measurement on corona and noise of 750 kV substation conductors and equipment ancillary fittings with 1 300 m high altitude to determine the corona discharge point and analyze the noise spectral characteristics. The maximum surface field strength control values of conductors and equipment ancillary fittings are given,and simulation modeling to calculate the electric field is made according to the actual installation location of the related equipment. Selecting or optimizing design for related structures of equipment and supporting insulator ancillary fittings according to field control requirements for the simulation significantly higher electric field points,so that electric field value is basically in control value. Finally,corona discharge and audible noise is measured for 750 kV substation with structural optimization ancillary fittings,and noise reduction effect is compared. Practice test results showed the substation e-lectromagnetic environment with optimized structure ancillary fittings is better. This study show that the results of the research on the 750 kV substation noise reduction effect is obvious,and there are good practical application value.

关 键 词：变电站 金具 电晕 噪声 优化 设备 绝缘子 起晕场强 

分 类 号：TM72[电气工程—电力系统及自动化]