【摘要】：真空斷路器作為電力生產(chǎn)和運行中的保護和開斷設備,現(xiàn)已在電力,化工,石油,冶金,煤炭,高層建筑及電氣化鐵道等領(lǐng)域得到廣泛應用。它具有普通開關(guān)所具備的一般性能,也就是其回路主體可以實現(xiàn)絕緣體和導體之間的快速轉(zhuǎn)換。且具有體積小、無污染、開斷能力強、重量輕、熄弧能力好以及使用壽命長等特性.被廣泛地應用在電力系統(tǒng)中。從而研究真空開關(guān)的特性逐漸成為目前新型開關(guān)電器領(lǐng)域的核心課題之一。論文用Rogowksi線圈作為電流傳感器,充分利用了其結(jié)構(gòu)簡單,精度高,線性度好,抗干擾能力強,使用安全便捷,易于實現(xiàn)數(shù)字化,更重要的是其空心線圈無磁飽和問題的優(yōu)點,實現(xiàn)了電弧電流的采集,并獲得了其真空電弧特性。更加突出了本論文的研究意義所在。本文首先介紹了課題研究背景、國內(nèi)外真空斷路器的發(fā)展和研究現(xiàn)狀,闡述了前人的研究成果及真空開關(guān)電弧的主要基本特性。并通過氣體放電理論介紹了電弧產(chǎn)生的基本機理和形成原因；結(jié)合真空電弧理論研究了電弧的產(chǎn)生,燃燒、以及熄滅的過程機理。并結(jié)合真空滅弧室的結(jié)構(gòu)分析了真空斷路器開斷故障電流的原理。本文研究了Rogowksi線圈電流傳感器的工作機理。然后對Rogowksi線圈傳感器進行了結(jié)構(gòu)分析和參數(shù)設計。并結(jié)合不同的磁芯材料,繞線匝數(shù)及積分電阻因素給出了Rogowski線圈幅頻,相頻及暫態(tài)時間響應特性的仿真分析。最后驗證了按照預先設計的Rogowksi線圈傳感器可以實現(xiàn)電弧電流的精確測量。。為描述真空斷路器的工頻電弧伏安特性,首先搭建了研究真空斷路器的電弧特性實驗平臺,分析了真空電弧電壓和電流值的變化對應關(guān)系；并通過調(diào)整觸頭開距研究了觸頭開距對真空電弧電壓特性的影響,深化并充實了課題內(nèi)容。
[Abstract]:Vacuum circuit breaker is widely used in electric power, chemical industry, petroleum, metallurgy, coal, high-rise building, electrified railway and so on. It has the general energy of the ordinary switch, that is, the main body of the circuit can realize the fast conversion between insulator and conductor. It has the characteristics of small volume, no pollution, strong breaking ability, light weight, good arc extinguishing ability and long service life. It is widely used in power system. Therefore, the study of the characteristics of vacuum switches has gradually become one of the core topics in the field of new type switchgear. In this paper, Rogowksi coil is used as current sensor, which makes full use of its advantages of simple structure, high precision, good linearity, strong anti-interference ability, safe and convenient use, easy to realize digitization, and more importantly, its hollow coil has no magnetic saturation. The acquisition of arc current is realized, and the vacuum arc characteristic is obtained. It also highlights the significance of this paper. This paper first introduces the research background, the development and current situation of vacuum circuit breaker at home and abroad, and describes the previous research results and the main basic characteristics of vacuum switch arc. The basic mechanism and cause of arc formation are introduced through the theory of gas discharge, and the mechanism of arc generation, combustion and extinction is studied in combination with the theory of vacuum arc. Combined with the structure of vacuum interrupter, the principle of breaking fault current of vacuum circuit breaker is analyzed. The working mechanism of Rogowksi coil current sensor is studied in this paper. Then the structure analysis and parameter design of Rogowksi coil sensor are carried out. The amplitude frequency, phase frequency and transient time response characteristics of Rogowski coils are simulated and analyzed in combination with different core materials, winding turns and integral resistance factors. Finally, it is verified that the arc current can be accurately measured by the pre-designed Rogowksi coil sensor. In order to describe the arc volt-ampere characteristics of vacuum circuit breakers, an experimental platform is set up to study the arc characteristics of vacuum circuit breakers, and the relationship between the variation of vacuum arc voltage and current value is analyzed. The influence of the contact distance on the voltage characteristics of vacuum arc is studied by adjusting the contact opening distance, which deepens and enriches the subject content.
【學位授予單位】：長沙理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM561.2
，

本文編號：2221137