CAJ | 학술논문

为了研究自由金属微粒对三相共筒式GIS设备运行的影响，提高局部放电检测水平，试验设计了3种不同形状、尺寸的自由金属微粒模型。采用逐步升压法对其进行试验，用超高频法测量了不同模型试品的局放起始电压，局放信号波形，对不同类型的自由金属微粒放电过程做了分析，建立了局部放电变化灰度图和脉冲分布图，获得了相应的图谱特征。试验结果表明，自由金属微粒尺寸较大，形状较规则，其局部放电正负半周差异性较小，放电幅值也相对较小；当微粒较小且形状越不规则，其局部放电越剧烈，放电量越大。另外试验结果还表明，在试验电压范围内，对于三相共筒式GIS，并没有发现自由金属微粒跳动情况。
위료연구자유금속미립대삼상공통식GIS설비운행적영향，제고국부방전검측수평，시험설계료3충불동형상、척촌적자유금속미립모형。채용축보승압법대기진행시험，용초고빈법측량료불동모형시품적국방기시전압，국방신호파형，대불동류형적자유금속미립방전과정주료분석，건립료국부방전변화회도도화맥충분포도，획득료상응적도보특정。시험결과표명，자유금속미립척촌교대，형상교규칙，기국부방전정부반주차이성교소，방전폭치야상대교소；당미립교소차형상월불규칙，기국부방전월극렬，방전량월대。령외시험결과환표명，재시험전압범위내，대우삼상공통식GIS，병몰유발현자유금속미립도동정황。
In order to study the influence that free medal particles have on the three-phase GIS and raise the level of partial discharge detection, the experiment design three kinds of free medal particles mod-els which have different shapes and different sizes lying in the inside of GIS.After improving voltage step by step in the experiment, measuring PD inception voltage and PD signal waveform in the trend diagram of the different test models, analyzing different types of free medal particles discharge process, we can estab-lish the trend chart of particle discharge, gray degree diagram and waveform diagram and obtain the corre-sponding map features at last.The experimental results show that the larger the free medal particles′size and the more rules the free medal particles own, the less the otherness of the positive and negative half cy-cle is and the smaller the discharge amplitude is.On the other hand, when the smaller and more rules, the more dramatic for partial discharge and the greater amount of discharge.Otherwise, we haven′t founcl free metal particle′s beating in the range of the experiment voltage on the three-phase GIS.