本文關(guān)鍵詞：計(jì)及微振磨損與風(fēng)雨荷載的輸電線可靠性建模　出處：《電力系統(tǒng)保護(hù)與控制》2015年02期 　論文類型：期刊論文

  更多相關(guān)文章： 可靠性建模 微振磨損 結(jié)構(gòu)強(qiáng)度時(shí)變模型 風(fēng)雨荷載

【摘要】：輸電線長(zhǎng)期受風(fēng)導(dǎo)致的振動(dòng)引起股線間微振磨損,而外部強(qiáng)風(fēng)雨荷載的沖擊進(jìn)一步加劇了磨損程度,導(dǎo)致斷股、斷線事故風(fēng)險(xiǎn)顯著增加,因此對(duì)經(jīng)受長(zhǎng)期微振磨損的輸電線在強(qiáng)風(fēng)雨荷載沖擊下的可靠性模型進(jìn)行研究具有重要實(shí)用價(jià)值。基于微振磨損的理論模型建立了ACSR的結(jié)構(gòu)強(qiáng)度時(shí)變模型,在考慮微振磨損的基礎(chǔ)上計(jì)入強(qiáng)風(fēng)雨荷載的影響,結(jié)合輸電線強(qiáng)度和永久荷載的隨機(jī)特性,建立輸電線時(shí)間相依可靠性模型。所提時(shí)間相依故障概率模型可以對(duì)輸電線斷股、斷線風(fēng)險(xiǎn)進(jìn)行準(zhǔn)確預(yù)測(cè)并實(shí)現(xiàn)惡劣天氣下的輸電線風(fēng)險(xiǎn)預(yù)警。算例結(jié)果表明,微振磨損會(huì)顯著降低輸電線的結(jié)構(gòu)可靠性,而強(qiáng)風(fēng)雨條件下的雨荷載則進(jìn)一步加劇了事故風(fēng)險(xiǎn)。
[Abstract]:Between the strands fretting caused by long-term vibration of transmission lines caused by wind, strong wind and rain and the external impact of further exacerbated the degree of wear, resulting in broken and broken accident risk increased significantly, so it has important practical value for research on the reliability model of transmission lines subjected to long-term fretting wear in the strong wind and rain under the impact. Based on the theoretical model of micro vibration wear, a time-dependent model of ACSR structure strength is established. Considering the influence of strong wind and rain load on the basis of considering micro vibration wear, combined with the random characteristics of transmission line strength and permanent load, a time dependent reliability model of transmission line is established. The proposed time dependent fault probability model can accurately predict the risk of the broken and broken lines of the transmission lines and realize the early warning of the risk of transmission lines in bad weather. The results show that the structural reliability of the transmission lines can be significantly reduced by the micro vibration wear, while the rain load under the strong wind and rain conditions further aggravates the risk of the accident.
【作者單位】： 輸配電裝備及系統(tǒng)安全與新技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室(重慶大學(xué));溫州供電公司;云南電網(wǎng)公司生產(chǎn)設(shè)備管理部;
【基金】：國(guó)家自然科學(xué)基金(50977094) 重慶市自然科學(xué)基金(CSTC,2011BB6047) 輸配電裝備及系統(tǒng)安全與新技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室自主研究項(xiàng)目(2007DA10512711208) 中央高�；究蒲袠I(yè)務(wù)費(fèi)科研專項(xiàng)資助(CDJZR11150012)~~
【分類號(hào)】：TM75
【正文快照】： This work is supported by National Natural Science Foundation of China(No.50977094),Natural Science Foundation ofChongqing(No.2011BB6047),State Key Laboratory of Power Transmission EquipmentSystem Security and New Technology(No.2007DA10512711208),and th

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