本文選題：絕緣材料 + 直流�。� 參考：《高電壓技術(shù)》2016年03期

【摘要】：電力設(shè)備用絕緣材料在使用過(guò)程中承受電、熱、機(jī)械等多種因素的應(yīng)力作用,電氣性能逐漸下降,研究絕緣材料的老化機(jī)理和壽命模型對(duì)材料壽命評(píng)估具有重要的意義。首先從傳統(tǒng)的絕緣材料宏觀老化模型出發(fā),總結(jié)了電、熱、機(jī)械應(yīng)力作用以及聯(lián)合作用下的絕緣材料老化壽命模型,其次從微觀角度總結(jié)歸類(lèi)了由于空間電荷效應(yīng)導(dǎo)致絕緣材料微觀缺陷的幾種絕緣老化壽命模型。最后探討了未來(lái)絕緣材料老化壽命模型的研究方向和發(fā)展趨勢(shì)。通過(guò)對(duì)比分析了不同宏觀老化模型的優(yōu)缺點(diǎn),并從微觀角度分析了空間電荷效應(yīng)及其引發(fā)的其他效應(yīng)(材料內(nèi)部微孔的形成、局部放電的發(fā)生、電樹(shù)枝的引發(fā)與生長(zhǎng)等)對(duì)絕緣材料的老化破壞作用�；诳臻g電荷效應(yīng)的絕緣老化壽命模型有望用于評(píng)估直流下的絕緣老化壽命,今后對(duì)于絕緣材料壽命模型的研究應(yīng)該由宏觀轉(zhuǎn)向微觀,并且應(yīng)借助各種先進(jìn)的宏觀微觀觀測(cè)分析手段,將仿真和實(shí)驗(yàn)緊密結(jié)合,采用動(dòng)態(tài)分析方法建立物理意義明確、失效時(shí)間準(zhǔn)確的絕緣老化壽命模型。
[Abstract]:The electrical properties of insulation materials for power equipment are gradually declining due to the stress of electric, thermal, mechanical and other factors. It is of great significance to study the aging mechanism and life model of insulating materials. Firstly, based on the traditional macroscopic aging model of insulating material, the aging life model of insulation material under electric, thermal, mechanical stress and combined action is summarized. Secondly, several aging life models of insulation materials due to space charge effect are summarized and classified from the microcosmic point of view. Finally, the research direction and development trend of aging life model of insulating materials in the future are discussed. The advantages and disadvantages of different macroscopical aging models are compared, and the space charge effect and its other effects (the formation of micropores in the material, the occurrence of partial discharge) are analyzed from the microscopic point of view. The aging and destruction of insulation materials due to the initiation and growth of electric dendrites. The insulation aging life model based on space charge effect is expected to be used to evaluate the insulation aging life under DC. In the future, the research on insulation life model should be changed from macro to micro. With the help of various advanced macroscopic and microscopic observation and analysis methods, the simulation and experiment should be closely combined, and the dynamic analysis method should be used to establish the insulation aging life model with clear physical meaning and accurate failure time.
【作者單位】： 西安交通大學(xué)電力設(shè)備電氣絕緣國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(51377131)~~
【分類(lèi)號(hào)】：TM21

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