1、根据测试结果,合理安排清扫周期,加强对电瓷设备清扫、监督工作,提高电瓷设备清扫质量,保证电网的安全稳定运行。我厂变电所由220kV变电所和四期220kV GIS变电所组成,东临桦林路,桦林路是牡丹江到佳木斯方向重要公路,西临厂内通行主要道路。根据变电所的实际情况,在变电所内设置4个模拟实际环境的盐密、灰密测试样瓶,每个样瓶由3叶瓷质绝缘子组成,这样可以得到接近真实盐密度值,4个测试点分布如下:盐密、灰密测试点位置表:测试点编号测试点位置220kVGIS #1牡北乙线出线构架220kV #2220kV甲母线北构架220kV #3220kV旁路南构架220kV #4#3主变#4主变间构架污秽等级等
2、级示意图0.040.020.01盐密值mg/cm2污秽等级:B级温度:20 湿度:35%序号测试地点测试部位盐密度mg/cm2灰密度污秽等级1220kV#2测试点上片0.0270.156中片0.133下片0.0250.1311.2倍平均值0.0320.1402#3测试点0.0310.1290.1630.0210.1390.1443#4测试点0.1460.1170.0350.1364220kVGIS#1测试点0.1030.1080.109结 论按Q/GDW152-2006电力系统污区分级与外绝缘选择标准规定要求,我厂变电所污秽等级为B级。试验人员: 试验日期: 2014-03-27 盐密、灰密度
3、测试数据220kV#2测试点测试温度20环境湿度测试面积1450 cm2测试时间2014.3.27计算: 用水量:300ml 含盐量:13mg ESDD=Nm/100S=(30013)/(1001450)=0.027mg/cm2灰密计算: 含灰量:1.130-0.90=0.23g NSDD=1000(Wf-Wi)/S=1000(1.130-0.90)/1450=0.156mg/cm22014.3.2815)/(1001.115-0.920=0.195g=1000(1.115-0.920)/1450=0.133mg/cm212mg12)/(100=0.025 mg/cm21.112-0.92=0
4、.192g=1000(1.112-0.92)/1450=0.131mg/cm2220kV#3测试点盐密计算:15mg=0.031mg/cm21.125-0.935=0.190g=1000(1.125-0.935)/1450=0.129mg/cm2=0.025mg/cm21.175-0.935=0.240g=1000(1.175-0.935)/1450=0.163mg/cm210mg=0.021mg/cm21.150-0.945=0.205g=1000(1.150-0.945)/1450=0.139mg/cm2220kV#4测试点1.158-0.943=0.215g=1000(1.158-0.943)/1450=0.146mg/cm21.155-0.940=0.215g=1000(1.155-0.940)/14501.110-0.940=0.170g=1000(1.110-0.940)/1450=0.117mg/cm2220kVGIS#1测试点10)/(100=1000(1.108-0.938)/14501.085-0.934=0.151g=1000(1.065-0.934)/1450=0.103mg/cm22013.3.271.105-0.948=0.157g=1000(1.105-0.948)/1450=0.108mg/cm2