1 100 kV特高壓交流復(fù)合套管局放原因分析及改進(jìn)措施
王賽豪1,史恒超2,秦政敏3,孫 英杰1,劉 龍1
(1 平高集團(tuán)有限公司,河南 平頂山 467001;2 河南平高電氣股份有限公司,河南 平頂山 467001;3 河南平芝高壓開關(guān)有限公司,河南 平頂山 467001)
摘 要:1 100 kV特高壓交流復(fù)合套管在例行出廠試驗(yàn)中出現(xiàn)局放超標(biāo)問(wèn)題,從耐壓設(shè)備、試驗(yàn)場(chǎng)地、裝配過(guò)程、測(cè)量系統(tǒng)、元件質(zhì)量等多個(gè)方面進(jìn)行原因分析,完成套管局放定位,后借助有限元方法對(duì)該位置予以確認(rèn)。綜合各種因素分析,局放產(chǎn)生的原因是由于空心復(fù)合絕緣子制造工藝的分散性,導(dǎo)致絕緣件內(nèi)部出現(xiàn)缺陷,進(jìn)而誘發(fā)局部放電。根據(jù)有限元分析結(jié)果,提出了雙層屏蔽結(jié)構(gòu)優(yōu)化措施,重新制造樣機(jī)并進(jìn)行試驗(yàn),試驗(yàn)結(jié)果表明:優(yōu)化后的屏蔽結(jié)構(gòu),能有效提高套管的起暈電壓,降低局放水平,保證產(chǎn)品可靠安全運(yùn)行。
關(guān)鍵詞:特高壓套管;局部放電;雙層屏蔽;電場(chǎng)分析
中圖分類號(hào):TM 216+.5;TM 853 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2017)09-0027-05
Partial Discharge Cause Analysis of 1 100 kV Extra-High Voltage AC Composite Bushing and Improvement Measure
WANG Sai-hao1, SHI Heng-chao2, QIN Zheng-min3, SUN Ying-jie1, LIU Long1
(1 Pinggao Group Co., Ltd, Pingdingshan 46 7001, China;2 Henan Pinggao Electric Co., Ltd, Pingdingshan 46 7001, China;
3 Henan Pingzhi High Voltage Switchgear Co., Ltd, Pingdingshan 46 7001, China)
Abstract: The partial discharge (PD) problem occurs in the 1 100 kV extra-high voltage AC composite bushing's routine factory test. This paper carried out the cause analysis from the respects, such as voltage test apparatus, test site environment, assembly process, test system, and component quality etc to complete the bushing PD location and to determine the location by the finite element analysis method. According to the synthesized analysis of various factors, it was found that the reason for PD was dispersion on composite bushing’s manufacturing process, which led to internal defects in insulators and caused PD to happen ultimately. Based on the finite element analysis result, this paper proposed the double-deck shield structure optimization measures to re-manufacture the prototype, carrying out test for it. The final test result shows that the optimized shield structure can raise bushing’s discharge inception voltage effectively, which reduces the PD level to ensure the reliable and safe operation for the products.
Key words: extra-high voltage bushing; partial discharge; double-deck shield; electric field analysis
參考文獻(xiàn)
[1] 舒印彪,張文亮.特高壓輸電若干關(guān)鍵技術(shù)研究[J].中國(guó)電機(jī)工程學(xué)報(bào),2007,27(31):l-6.
[2] 孫崗,吳光亞,張銳,等.特高壓GIS出線套管用空心復(fù)合絕緣子運(yùn)行性能分析[J].電瓷避雷器,2014(6):1-7.
[3] 馬斌.復(fù)合空心絕緣子產(chǎn)品及其制造技術(shù)[J].變壓器,2003,40(8):35-38.
[4] 張銳,吳光亞,張廣全,等.復(fù)合空心絕緣子的發(fā)展現(xiàn)狀與應(yīng)用前景[J].電力設(shè)備,2007,8(4):36-38.
[5] 馬斌.1 100 kV交流SF6組合電器用空心復(fù)合絕緣子的設(shè)計(jì)及實(shí)現(xiàn)[J].電網(wǎng)技術(shù),2006,30(12):98-101.
[6] 王曉琪,吳春風(fēng),李培,吳士普.1 000 kV GIS用套管的設(shè)計(jì)[J].高電壓技術(shù),2008,34(9):1792-1796.
[7] 李乃一,彭宗仁,劉鵬,等.特高壓SF6氣體絕緣套管內(nèi)屏蔽結(jié)構(gòu)研究[J].高電壓技術(shù),2015,41(11):3737-3745.
[8] 鐘建英,狄謙.550 kV SF6氣體絕緣GIS套管內(nèi)屏蔽結(jié)構(gòu)的研究[J].高壓電器,2011,47(4):33-36.
[9] 方江,孔維貞.800 kV六氟化硫氣體絕緣復(fù)合套管的研制[J].電工電氣,2012(4):42-45.
[10] 吳光亞,葉廷路,吳巾克,等.±500 kV換流站直流分壓器用復(fù)合套管外絕緣閃絡(luò)事故分析及處理措施[J].電瓷避雷器,2010(5):17-22.
[11] 杜林,崔婷,孫才新.UVT RONR2862型紫外傳感器檢測(cè)交流電暈放電[J].高電壓技術(shù),2009,35(2):272-276.
[12] 許學(xué)勤,張重遠(yuǎn),李燕青,等.接地內(nèi)屏蔽對(duì)SF6套管電場(chǎng)分布影響的研究[J].華北電力大學(xué)學(xué)報(bào)(自然科學(xué)版),2007,34(6):11-14.
[13] 鐘建英,韓書謨,張友鵬,等.特高壓復(fù)合套管設(shè)計(jì)計(jì)算與分析[J].電氣制造,2008(2):62-64.
[14] 張宏亮.特高壓交流1 100 kV GIS出線套管內(nèi)絕緣結(jié)構(gòu)優(yōu)化[D].西安:西安交通大學(xué),2009.
[15] 黎斌.SF6高壓電器設(shè)計(jì)[M].北京:機(jī)械工業(yè)出版社,2003.