光谱学与光谱分析
光譜學與光譜分析
광보학여광보분석
SPECTROSCOPY AND SPECTRAL ANALYSIS
2015年
2期
438-442
,共5页
赵宇%王先培%胡红红%代荡荡%龙嘉川%田猛%朱国威%黄云光
趙宇%王先培%鬍紅紅%代盪盪%龍嘉川%田猛%硃國威%黃雲光
조우%왕선배%호홍홍%대탕탕%룡가천%전맹%주국위%황운광
气体绝缘开关%局部放电%过热故障%故障统一预警%紫外光谱
氣體絕緣開關%跼部放電%過熱故障%故障統一預警%紫外光譜
기체절연개관%국부방전%과열고장%고장통일예경%자외광보
Gas insulation switchgear%Partial discharge%Overheated fault%Fault unified early-warning%Ultraviolet spectroscopy
气体绝缘开关(GIS)故障预警强调异常识别的实效性和现场适用性,是精确诊断的基础。研究GIS内局部放电(PD)及过热故障的统一预警方法具有重要意义。提出将SO2作为GIS内部两类故障公共的特征分解物,并应用紫外光谱(UV)测量SO2实现多故障早期预警。一阶导数法和Savitzky-Golay滤波被用于快速基线校正和光谱平滑,290~310 nm 被选为特征区进行 SO2检测及定量。UV 检测可避免诸如 SF6及SOF2、SO2 F2等分解物的干扰,便于从复杂的SF6分解物组分中识别微量SO2特征,测量系统结构简单、维护成本低、适于现场检测。通过模拟SF6气体在两类PD缺陷及200~400℃过热条件下的分解实验,证实所提UV预警方法的有效性:两类GIS故障条件下都会稳定的生成SO2。对UV预警后的故障诊断,借助傅里叶变换红外光谱仪及气相色谱仪,确认PD及过热故障下的分解物组分存在差异,并据此简要分析了故障类型辨识方法。PD分解物以SOF2和SO2 F2为主,SO2含量远小于SOF2,放电涉及环氧树脂时含碳分解物含量上升。过热材质为不锈钢时,SF6约在300℃发生分解,300~400℃内的过热分解物主要为 SO2和SOF2,350℃以上SO2生成速率明显快于PD时。随着GIS 内故障持续恶化,SO2含量均呈现稳定上升趋势。在UV预警后,可利用获得的SO2生成特性初步辨识故障类型。
氣體絕緣開關(GIS)故障預警彊調異常識彆的實效性和現場適用性,是精確診斷的基礎。研究GIS內跼部放電(PD)及過熱故障的統一預警方法具有重要意義。提齣將SO2作為GIS內部兩類故障公共的特徵分解物,併應用紫外光譜(UV)測量SO2實現多故障早期預警。一階導數法和Savitzky-Golay濾波被用于快速基線校正和光譜平滑,290~310 nm 被選為特徵區進行 SO2檢測及定量。UV 檢測可避免諸如 SF6及SOF2、SO2 F2等分解物的榦擾,便于從複雜的SF6分解物組分中識彆微量SO2特徵,測量繫統結構簡單、維護成本低、適于現場檢測。通過模擬SF6氣體在兩類PD缺陷及200~400℃過熱條件下的分解實驗,證實所提UV預警方法的有效性:兩類GIS故障條件下都會穩定的生成SO2。對UV預警後的故障診斷,藉助傅裏葉變換紅外光譜儀及氣相色譜儀,確認PD及過熱故障下的分解物組分存在差異,併據此簡要分析瞭故障類型辨識方法。PD分解物以SOF2和SO2 F2為主,SO2含量遠小于SOF2,放電涉及環氧樹脂時含碳分解物含量上升。過熱材質為不鏽鋼時,SF6約在300℃髮生分解,300~400℃內的過熱分解物主要為 SO2和SOF2,350℃以上SO2生成速率明顯快于PD時。隨著GIS 內故障持續噁化,SO2含量均呈現穩定上升趨勢。在UV預警後,可利用穫得的SO2生成特性初步辨識故障類型。
기체절연개관(GIS)고장예경강조이상식별적실효성화현장괄용성,시정학진단적기출。연구GIS내국부방전(PD)급과열고장적통일예경방법구유중요의의。제출장SO2작위GIS내부량류고장공공적특정분해물,병응용자외광보(UV)측량SO2실현다고장조기예경。일계도수법화Savitzky-Golay려파피용우쾌속기선교정화광보평활,290~310 nm 피선위특정구진행 SO2검측급정량。UV 검측가피면제여 SF6급SOF2、SO2 F2등분해물적간우,편우종복잡적SF6분해물조분중식별미량SO2특정,측량계통결구간단、유호성본저、괄우현장검측。통과모의SF6기체재량류PD결함급200~400℃과열조건하적분해실험,증실소제UV예경방법적유효성:량류GIS고장조건하도회은정적생성SO2。대UV예경후적고장진단,차조부리협변환홍외광보의급기상색보의,학인PD급과열고장하적분해물조분존재차이,병거차간요분석료고장류형변식방법。PD분해물이SOF2화SO2 F2위주,SO2함량원소우SOF2,방전섭급배양수지시함탄분해물함량상승。과열재질위불수강시,SF6약재300℃발생분해,300~400℃내적과열분해물주요위 SO2화SOF2,350℃이상SO2생성속솔명현쾌우PD시。수착GIS 내고장지속악화,SO2함량균정현은정상승추세。재UV예경후,가이용획득적SO2생성특성초보변식고장류형。
As the basis of accurate diagnosis,fault early-warning of gas insulation switchgear (GIS)focuses on the time-effec-tiveness and the applicability.It would be significant to research the method of unified early-warning for partial discharge (PD) and overheated faults in GIS.In the present paper,SO2 is proposed as the common and typical by-product.The unified monito-ring could be achieved through ultraviolet spectroscopy (UV)detection of SO2 .The derivative method and Savitzky-Golay filte-ring are employed for baseline correction and smoothing.The wavelength range of 290~310 nm is selected for quantitative detec-tion of SO2 .Through UV method,the spectral interference of SF6 and other complex by-products,e.g.SOF2 and SOF2 ,can be avoided and the features of trace SO2 in GIS can be extracted.The detection system is featured by compacted structure,low ma-intenance and satisfactory suitability in filed surveillance.By conducting SF6 decomposition experiments,including two types of PD faults and the overheated faults between 200~400 ℃,the feasibility of proposed UV method has been verified.Fourier transform infrared spectroscopy and gas chromatography methods can be used for subsequent fault diagnosis.The different de-composition features in two kinds of faults are confirmed and the diagnosis strategy has been briefly analyzed.The main by-prod-ucts under PD are SOF2 and SO2 F2 .The generated SO2 is significantly less than SOF2 .More carbonous by-products will be gen-erated when PD involves epoxy.By contrast,when the material of heater is stainless steel,SF6 decomposes at about 300 ℃ and the main by-products in overheated faults are SO2 and SO2 F2 .When heated over 350 ℃,SO2 is generated much faster.SO2 con-tent stably increases when the GIS fault lasts.The faults types could be preliminarily identified based on the generation features of SO2 .