本文選題：真空斷路器　切入點(diǎn)：35kV并聯(lián)電抗器　出處：《浙江大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：真空斷路器具有滅弧能力強(qiáng)、可靠性高、使用壽命長、無火災(zāi)危害、合適頻繁操作等優(yōu)點(diǎn),在10及以下系統(tǒng)已經(jīng)得到廣泛的應(yīng)用。近年來,真空斷路器用于投切35kV并聯(lián)電抗器的情況逐漸增多,然而根據(jù)實(shí)際運(yùn)行經(jīng)驗(yàn),發(fā)生變電站內(nèi)斷路器相間絕緣擊穿、母線壓變高壓熔絲熔斷等過電壓事故屢見不鮮,危害電力設(shè)備安全,影響電力系統(tǒng)的正常運(yùn)行。這證明了現(xiàn)有的常規(guī)過電壓裝置保護(hù)效果不佳,對35kV系統(tǒng)使用真空斷路器投切并聯(lián)電抗器引起的過電壓保護(hù)值得進(jìn)一步研究。 本文基于EMTP計算程序,以浙江省某220kV變電站為依托,仿真模擬了真空斷路器投切35kV并聯(lián)電抗器引起的過電壓事故。根據(jù)故障錄波圖,分析了過電壓的產(chǎn)生機(jī)理與條件,并進(jìn)行了仿真復(fù)現(xiàn)。研究表明,截流效應(yīng)是真空斷路器投切時不可避免的,但截流值一般可以得到有效限制；復(fù)燃現(xiàn)象與真空斷路器的觸頭材質(zhì)、操作機(jī)構(gòu)等有關(guān),一般具有很大的隨機(jī)性；三相同時開斷過電壓會引起較高的截流與電弧重復(fù)燃燒,在非首開相引起較高幅值的過電壓,是引起較高過電壓幅值的主要原因。 基于仿真模型,本文還重點(diǎn)研究了目前的三種過電壓過電壓保護(hù)裝置,分別進(jìn)行了保護(hù)效果分析比較。結(jié)果顯示,常規(guī)三星型避雷器與四星型避雷器對相對地過電壓的保護(hù)效果相差不多,而四星型避雷器的相間過電壓保護(hù)效果明顯優(yōu)于三星型避雷器。針對真空斷路器投切并聯(lián)電抗器引起的過電壓,使用阻容吸收器的保護(hù)效果優(yōu)于兩種避雷器。接著本文比較了不同過電壓保護(hù)安裝方案下的過電壓保護(hù)效果,結(jié)果顯示母線側(cè)同樣需要安裝過電壓保護(hù)器以限制母線側(cè)過電壓。在第5章中還介紹了一種斷路器末端投切保護(hù)方案,該方案以增設(shè)一臺斷路器為代價限制過電壓,其優(yōu)點(diǎn)在于增設(shè)斷路器的方法簡單,不必考慮安裝過電壓保護(hù)裝置時過電壓保護(hù)裝置本身的安全與可靠性問題。最后本文對考慮遠(yuǎn)景時的雷擊侵入波與鐵磁諧振進(jìn)行了概述。
[Abstract]:Vacuum circuit breaker with arc extinguishing capability, high reliability, long service life, no fire hazard, suitable for frequent operation and other advantages, and in 10 the following system has been widely used. In recent years, vacuum circuit breaker for switching 35kV shunt reactor situation gradually increased, but according to the actual operation experience, occurred in the substation circuit breaker and insulation breakdown, bus voltage transformer high-voltage fuse overvoltage accidents endangering the safety of power equipment, It is often seen., affecting the normal operation of power system. This proves that the existing conventional overvoltage protection device of poor effect, worthy of further research on overvoltage protection system using 35kV vacuum circuit breaker switching shunt reactor caused.
The calculation program based on EMTP, a 220kV substation in Zhejiang Province Based on the simulation of the vacuum breaker switching overvoltage accidents caused by cutting 35kV shunt reactor. According to the fault oscillograph, analyzed the voltage generating mechanism and conditions, and the simulation realization. It is indicated that the closure effect of vacuum breaker switching cut the inevitable, but the value of general closure can be effectively restrained; the contact material and the resurgence of the phenomenon of vacuum circuit breaker, operation mechanism and so on, has great randomness; at the same time the three-phase breaking overvoltage caused by high repetition and closure of arc burning, overvoltage caused by high amplitude in the first phase, is mainly caused by high voltage.
Based on the simulation model, this paper also focuses on the present three kinds of overvoltage protection devices, were carried out to compare the effect of protection. The results showed that the protective effect of conventional Samsung type lightning arrester and the four type arrester on relative overvoltage is similar, while the white four-star type lightning arrester overvoltage protection effect is better than Samsung type arrester. For over voltage of vacuum circuit breaker switching shunt reactor caused by the use of RC absorber protection is better than two. Then this paper compares the lightning arrester overvoltage protection effect overvoltage protection installation scheme. Results show that the bus side also need to install the overvoltage protector to limit bus side voltage. In the fifth chapter also introduces a kind of circuit breaker terminal switching protection scheme, the scheme for the creation of a circuit breaker limit overvoltage at the cost of the utility model has the advantages of increasing. The circuit breaker's method is simple. It doesn't need to consider the safety and reliability of overvoltage protection device when overvoltage protection device is installed. Finally, the paper summarizes the lightning invasion wave and Ferroresonance in the future.

【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM472

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 丁常松;劉浩;;10kV壓變高壓側(cè)熔絲熔斷原因及抑制措施[J];安徽電氣工程職業(yè)技術(shù)學(xué)院學(xué)報;2012年01期

2 劉建喜,唐文彬;真空斷路器的操作過電壓及其限制措施[J];船電技術(shù);2001年04期

3 安昌平;夏立;;35KV真空斷路器切空變過電壓研究[J];重慶電力高等專科學(xué)校學(xué)報;2001年02期

4 谷定燮;李小玲;莫青;王善鈞;王子春;;保護(hù)并聯(lián)電容器組的MOA接線方式和吸收能量的研究[J];電瓷避雷器;1991年03期

5 閻中華;楊凌輝;;用三相組合式MOA限制相間過電壓的研究[J];電瓷避雷器;1993年04期

6 趙峰,杜斌,劉青,陳梁金,施圍;35kV并聯(lián)無功補(bǔ)償裝置的MOA保護(hù)方案研究[J];電瓷避雷器;2004年04期

7 郭潔,施圍,杜斌;保護(hù)并補(bǔ)電容器用三星與四星接線避雷器運(yùn)行特性分析[J];電瓷避雷器;2004年06期

8 高玉明，吳維韓，金祖山，楊立波;弧光接地過電壓下氧化鋅避雷器的通流能力問題[J];電瓷避雷器;1994年02期

9 王川，杜世俊;帶串聯(lián)間隙四星形接法的MOA[J];電瓷避雷器;1995年05期

10 孫秋芹;李慶民;王冠;劉洪順;鄒振宇;;SF_6斷路器開斷并聯(lián)電抗器的截流過電壓及其特性分析[J];電工技術(shù)學(xué)報;2010年02期

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本文編號：1576164