高电压技术
高電壓技術
고전압기술
HIGH VOLTAGE ENGINEERING
2012年
2期
273-279
,共7页
律方成%戴日俊%金虎%王胜辉%刘晓飞%郭文义
律方成%戴日俊%金虎%王勝輝%劉曉飛%郭文義
률방성%대일준%금호%왕성휘%류효비%곽문의
特高压(UHV)%绝缘子%紫外(UV)成像%光斑面积%光斑直径%数学形态学%状态评估
特高壓(UHV)%絕緣子%紫外(UV)成像%光斑麵積%光斑直徑%數學形態學%狀態評估
특고압(UHV)%절연자%자외(UV)성상%광반면적%광반직경%수학형태학%상태평고
ultra high voltage(UHV)%insulators%ultraviolet(UV) imaging%flare area%flare diameter%mathematical morphology%condition assessment
绝缘子的运行状态直接关系着特高压(UHV)电网的稳定性,绝缘子在运行过程中会出现绝缘性能下降同时伴随着表面放电,可以用紫外(UV)成像仪对其运行状态进行检测。根据直流特高压工程技术国家工程实验室(昆明)的设计要求开发了一套紫外数据管理系统,采用Delphi7作为管理系统开发软件,SQL Server2000作为后台数据库,运用模块化开发思想,建立了基本信息管理、图像处理、紫外视频播放和报表生产等功能模块,运用数学形态学提取紫外光斑中的放电参数。通过喷水分级法在现场选择了正常、良好、微孔、劣化和严重老化5种绝缘状态的同一种绝缘子,提取了"光斑直径"和"光斑面积",通过MATLAB数字仿真,得到了这2种参数随绝缘状态的变化趋势,结果表明:绝缘状态良好时,光斑面积〈250(像素点),光斑直径〈15(像素点);出现微弱放电时,光斑面积在12 000(像素点)左右,光斑直径在130(像素点)左右;当出现闪络,绝缘几乎丧失时,光斑面积〉30 000(像素点),光斑直径〉250。该软件为绝缘子运行状态的评估提供了量化依据和一定的指导。
絕緣子的運行狀態直接關繫著特高壓(UHV)電網的穩定性,絕緣子在運行過程中會齣現絕緣性能下降同時伴隨著錶麵放電,可以用紫外(UV)成像儀對其運行狀態進行檢測。根據直流特高壓工程技術國傢工程實驗室(昆明)的設計要求開髮瞭一套紫外數據管理繫統,採用Delphi7作為管理繫統開髮軟件,SQL Server2000作為後檯數據庫,運用模塊化開髮思想,建立瞭基本信息管理、圖像處理、紫外視頻播放和報錶生產等功能模塊,運用數學形態學提取紫外光斑中的放電參數。通過噴水分級法在現場選擇瞭正常、良好、微孔、劣化和嚴重老化5種絕緣狀態的同一種絕緣子,提取瞭"光斑直徑"和"光斑麵積",通過MATLAB數字倣真,得到瞭這2種參數隨絕緣狀態的變化趨勢,結果錶明:絕緣狀態良好時,光斑麵積〈250(像素點),光斑直徑〈15(像素點);齣現微弱放電時,光斑麵積在12 000(像素點)左右,光斑直徑在130(像素點)左右;噹齣現閃絡,絕緣幾乎喪失時,光斑麵積〉30 000(像素點),光斑直徑〉250。該軟件為絕緣子運行狀態的評估提供瞭量化依據和一定的指導。
절연자적운행상태직접관계착특고압(UHV)전망적은정성,절연자재운행과정중회출현절연성능하강동시반수착표면방전,가이용자외(UV)성상의대기운행상태진행검측。근거직류특고압공정기술국가공정실험실(곤명)적설계요구개발료일투자외수거관리계통,채용Delphi7작위관리계통개발연건,SQL Server2000작위후태수거고,운용모괴화개발사상,건립료기본신식관리、도상처리、자외시빈파방화보표생산등공능모괴,운용수학형태학제취자외광반중적방전삼수。통과분수분급법재현장선택료정상、량호、미공、열화화엄중노화5충절연상태적동일충절연자,제취료"광반직경"화"광반면적",통과MATLAB수자방진,득도료저2충삼수수절연상태적변화추세,결과표명:절연상태량호시,광반면적〈250(상소점),광반직경〈15(상소점);출현미약방전시,광반면적재12 000(상소점)좌우,광반직경재130(상소점)좌우;당출현섬락,절연궤호상실시,광반면적〉30 000(상소점),광반직경〉250。해연건위절연자운행상태적평고제공료양화의거화일정적지도。
Stability of ultra high voltage(UHV) grid is directly related to operation status of insulators.Insulation performance of insulators may degrade in operation process with surface discharge emerging,and ultraviolet(UV) camera can be used to detect the operation state of insulator effectively.Consequently,we developed a set of UV data management system on the basis of Delphi7 and SQL Server 2000.For modular development,we established a system including basic information management,image processing,UV broadcast,and statement,and utilized mathematical morphology to get the discharge parameters.Through the water spray classification method,we selected 5 kinds of insulation states such as normal,good,micro hole,degradation and serious aging,and extracted the "spot diameter" and "flare area".Through the MATLAB digital simulation,we got these two parameters changing with different insulating states.The results show that,when the insulation status is good,flare area is less than 250,flare diameter less than 15;when weak discharge appears,flare area is 12 000 or so,flare diameter is at around 130;when there is flash collaterals,insulation is almost lost,flare area is more than 30 000,and spot diameter is more than 250.This software provides a quantitative basis and certain guidance for evaluation of insulator states.