1 100 kV氣體絕緣金屬封閉開(kāi)關(guān)設(shè)備母線機(jī)械性能分析
蘇安1,2，庚振新1,2，肖婉秋3，徐建源1,2，林莘1,2
1 沈陽(yáng)工業(yè)大學(xué) 電氣工程學(xué)院，遼寧 沈陽(yáng) 110870；
2 遼寧省電網(wǎng)安全運(yùn)行與監(jiān)測(cè)重點(diǎn)實(shí)驗(yàn)室，遼寧 沈陽(yáng) 110870；
3 國(guó)網(wǎng)沈陽(yáng)市于洪區(qū)供電公司，遼寧 沈陽(yáng) 110141
摘 要：以1 100 kV氣體絕緣金屬封閉開(kāi)關(guān)設(shè)備(GIS)母線為研究對(duì)象，采用有限元的方法，針對(duì)GIS母線在導(dǎo)體對(duì)外殼短路、導(dǎo)體懸臂、運(yùn)輸顛簸三種情況，對(duì)支持絕緣子所承受的應(yīng)力進(jìn)行計(jì)算。對(duì)比母線自振頻率，對(duì)GIS母線筒在導(dǎo)體安裝偏心導(dǎo)致的偏心電動(dòng)力與高速風(fēng)載荷下的振動(dòng)進(jìn)行分析。計(jì)算結(jié)果表明：在現(xiàn)場(chǎng)安裝過(guò)程中，因?qū)w支撐不穩(wěn)導(dǎo)致導(dǎo)體懸臂時(shí)，絕緣子根部產(chǎn)生的應(yīng)力最大，可達(dá)到絕緣子許用應(yīng)力的80%以上，需要特別注意；若GIS母線發(fā)生短路故障，考慮殼體電阻對(duì)電流的影響，當(dāng)短路點(diǎn)與接地點(diǎn)均位于殼體正上方時(shí)，絕緣子根部嵌件與環(huán)氧樹(shù)脂的粘接面產(chǎn)生的應(yīng)力最大，最大值為27.1 MPa，在最大短路電動(dòng)力的作用下，能保證支持絕緣子機(jī)械性能的最佳嵌件半徑為70 mm；在計(jì)算條件下，母線在偏心電動(dòng)力以及高速風(fēng)載荷的作用下，發(fā)生共振的可能性較小。
關(guān)鍵詞：氣體絕緣金屬封閉開(kāi)關(guān)設(shè)備；支持絕緣子；應(yīng)力；振動(dòng)
中圖分類號(hào)：TM201.4+1 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1007-3175(2015)06-0051-07
Busbar Mechanical Performance Analysis of 1 100 kV Gas Insulated Metal-Enclosed Switchgear
SU An1,2, GENG Zhen-xin1,2, XIAO Wan-qiu3, XU Jian-yuan1,2, LIN Xin1,2
1 School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China;
2 Liaoning Province Key Lab of Power Grid Safe Operation and Monitoring, Shenyang 110870, China;
3 State Grid Shenyang Yuhong Power Supply Company, Shenyang 110141, China
Abstract: In the case of 1 100 kV gas insulated metal-enclosed switchgear busbar conductor was in short circuit for shell, conductor cantilevered and transportation bumps, the finite element analysis method was adopted to calculate the stress of the support insulator. Comparing with the bus natural frequency of vibration, this paper analyzed the gas insulated metal-enclosed switchgear busbar vibration under the eccentric electric power caused by conductor installation eccentricity and the load of high speed wind. The calculation results show that in the process of onsite installation, the maximum of the stress caused by unstable conductor supporting cantilever, appears at the root of insulator, up to 80% of the admissible stress of insulator. If gas insulated metal-enclosed switchgear busbar short circuit fault occurs, considering the influence of the shell resistance to current, when the short-circuit point and the ground point are directly above the shell, the greatest stress is produced at root of the insulator and the insert epoxy resin adhesive surface, the maximum is 27.1 MPa. The insert radius which has the best mechanical properties of support insulators is 70 mm. Under the condition of this calculation, the busbar in an eccentric electric power and high-speed wind load effect, the possibility of resonance is smaller.
Key words: gas insulated metal-enclosed switchgear; supporting insulator; stress; vibration
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