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flashover 【電學】飛弧,閃絡,跳火。

flashtube

It has also been found that the pre - flashover events and the charging characteristic are related to the flashover performance , the samples with seldom pre - flashover events and lower charging ability show a better flashover performance 通過研究發現,對于同組分的陶瓷材料來說,如果材料的晶粒越小,分布越均勻,缺陷越少,則該材料的沿面閃絡電壓就越高。

This article , which researches on composite insulators “ ac flashover characteristic in high altitude and ice environment , has significant science values in theory and can also create enormous economy benefit in engineering 因此本文研究合成絕緣子在高海拔和覆冰地區的交流閃絡特性在理論上具有非常重要學術價值,在工程上能夠創造巨大的經濟效益。

With the development of electric power system arid the aggravation of pollution , contamination flashover in hv insulator is getting worse and worse , so there ' s great importance in the measuring of hv insulator ' s leakage current 摘要隨著電力系統的發展和各類污染的加劇,高壓絕緣子的污穢閃絡事故日益嚴重,對其泄漏電流的檢測具有實際工程意義。

Flashover is preceded by dry - band arcing and extension of the arc to bridge the insulator . this combination significantly modifies both the magnitude and shape of the leakage current 本文在檢索大量國內外參考文獻及研究成果的基礎上,提出一種性能價格比優良的線路絕緣子在線監測方案? ?基于msp430的輸電線絕緣子泄漏電流檢測。

On the condition of insulator covered in snow or ice chill climate area of northeast in china , many accidence of insulation flashover occurred which brought prodigious damage for electric power system and loss for economic 國內東北地區在寒冷氣候條件下覆冰覆雪時曾發生過多次閃絡和絕緣擊穿事故,造成極大危害和經濟損失。

The paper applies sdm in analysis of the cause of pollution flashover , brings up the patrol and investigate attention , as a reference of planning power line patrol and investigate scheme 同時在分析了污閃事故發生的各種條件基礎上,應用空間數據挖掘,提出了線路關注度這一新的指標,作為絕緣子狀態巡檢計劃編制的參考指標。

Some basic concepts of insulator contamination are introduced firstly . existing methods of avoiding contamination flashover and methods of detecting contamination degree of insulators are discussed in details 首先介紹了變電污穢及其相關概念,并對國內外現有的變電污穢防治方法和變電污穢在線監測方法進行了研究。

Some basic concepts of insulator contamination are introduced firstly . existing methods of avoiding contamination flashover and methods of detecting contamination degree of insulators are discussed in details 介紹了變電污穢及其相關概念,并對國內外現有的變電污穢防治方法和變電污穢在線監測方法進行了研究。

The flashover of iced insulators is also caused by the leakage current . the variety and development of the leakage current is one of the main factors to cause the iced insulators flashover 覆冰絕緣子的閃絡也是由泄漏電流引起的,泄漏電流的變化與發展是導致其是否能發展成完全閃絡的主要因素之一。

This phenomenon indicates that there is closed relationship between the development of local arc , the flashover of the insulators and the discharge activity initiated at the icicle tips 這說明,覆冰絕緣子的起始放電和局部電弧的發展乃至整串的閃絡與發生在冰柱尖端的起始放電活動有非常密切的關系。

So there is important implication value and academic value to systemic investigation of the effect of the existence of air gap to the flashover voltage along the ice - covered insulators 因此,深入、系統的研究空氣間隙中的放電活動對絕緣子串閃絡電壓的影響有著重要的工程應用價值和學術意義。

The flashover performance of alumina ceramics can be evaluated based on the above results , and it is helpful for choosing a proper material used in vacuum insulation system . 4 本研究結果為評價材料在真空中的沿面閃絡性能提供了一個參考標準,對正確選擇真空用陶瓷絕緣材料有重要意義。

The insulation characteristic of insulator in vacuum is researched in the process of the high voltage breakdown along the insulator surface in vacuum , which is called vacuum surface flashover 絕緣子的真空表面絕緣特性研究真空下的高壓沿絕緣子表面擊穿物理過程,稱真空表面閃絡過程。

The way to shield the back current of foilless diode is analyzed by karat program . the surface flashover is raised from 300kv to 400kv when the shield is added in experiments 使用karat程序分析了無箔二極管的回流屏蔽方法,實驗中發現加屏蔽環后表面閃絡電壓從300kv提高到了400kv 。

The iced insulators flashover is one of the main faults of the ehv transmission lines in icing regions . icing is especial form of pollution 對覆冰地區的超高壓線路,絕緣子覆冰引起的閃絡已經成為最主要的故障之一,對電力系統的安全運行造成了極大的威脅。

And it would last a long time because of the flashover development , it ' s difficult to data acquisition or logging the leakage current waveform by currently instruments 并且泄漏電流的持續時間長,試驗中利用現有儀器觀測和記錄整個閃絡過程難以實現。

Working too close or causing damage to overhead lines is dangerous and can lead to flashover , explosion or fire and often results in casualties 在太接近架空電纜的地方工作,或造成架空電纜損壞均會構成危險,可引致跳火、爆炸或火警,并經常引致傷亡。

The problem of insulator pollution flashover in power lines is increasingly serious , because of increasing times and extending areas of flashover 線路絕緣子污閃問題日益突出,表現為污閃次數的增加、面積的擴大,與雷害并列為造成停電事故的主要原因。

Field circuit breaker failure causing too low arcing voltage followed by blast of ionised air in + es cubicle and flashover at the left extremity of ac bus bars 導致弧壓過低的磁場斷路器故障是引發+ es柜空氣電離和交流母排左側末端處發生閃絡的原因。