本文選題：500kV變電設(shè)備　切入點(diǎn)：帶電水沖洗　出處：《武漢大學(xué)》2014年博士論文　論文類型：學(xué)位論文

【摘要】：輸變電設(shè)備外絕緣污閃是我國電力系統(tǒng)安全運(yùn)行的主要威脅,帶電水沖洗是防污閃的重要技術(shù)手段,目前在220kV及以下電壓等級已經(jīng)得到廣泛應(yīng)用,而500kV變電設(shè)備帶電水沖洗此前還沒有開展,基礎(chǔ)理論研究和工程實(shí)踐還處于空白狀態(tài)。本文針對500kV變電設(shè)備帶電水沖洗技術(shù)開展了系統(tǒng)研究,包括500kV變電設(shè)備帶電水沖洗射流特性及清洗效率、帶電水沖洗水柱絕緣性能、帶電水沖洗支柱絕緣性能、帶電水沖洗方法、裝置及工程應(yīng)用等方面,研究成果已在工程實(shí)踐得到驗(yàn)證和應(yīng)用。 帶電水沖洗射流特性及清洗效率方面,結(jié)合水射流動力學(xué)基本理論,開展了帶電水沖洗射流形態(tài)結(jié)構(gòu)的數(shù)值仿真和攝影觀測,得到了帶電水沖洗射流形態(tài)、水柱截面寬度和水射流速度場分布,觀測發(fā)現(xiàn)了水射流不同距離的豐富形態(tài),提出了帶電水沖洗水柱射流結(jié)構(gòu)模型。建立了戶外帶電水沖洗測試場,提出了帶電水沖洗打擊力和清洗效率測試方法,開展了車載機(jī)械臂沖洗和人站在地面沖洗清洗效率對比測試,獲得了帶電水沖洗射流打擊力和清洗效率與出口壓強(qiáng)、噴嘴直徑、水柱長度、作業(yè)方式及沖洗角度等的定量規(guī)律,為500kV帶電水沖洗射流理論研究奠定了基礎(chǔ)。 500kV變電設(shè)備帶電水沖洗水柱絕緣方面,開展了500kV帶電水沖洗水柱工頻泄漏電流和操作波沖擊放電特性試驗(yàn),得到了水柱工頻泄漏電流、操作沖擊放電電壓與水電阻率、水柱長度、噴嘴直徑、壓強(qiáng)等參數(shù)的定量規(guī)律,提出了500kV帶電水沖洗水柱絕緣安全水柱長度的控制值,試驗(yàn)驗(yàn)證了規(guī)定的合理性。 500kV變電設(shè)備帶電水沖洗沖洗方法方面,系統(tǒng)開展了500kV三槍及四槍帶電水沖洗76種工況試驗(yàn)對比,將絕緣子表面泄漏電流波形等特征量用于絕緣帶電水沖洗安全性定量評價(jià),發(fā)現(xiàn)了帶電水沖洗過程中泄漏電流幅度突增現(xiàn)象,得到了沖洗全過程電流幅度變化曲線及不同沖洗階段帶電水沖洗泄漏電流特征量,比較了三槍、四槍不同沖洗方法安全性以及不同鹽密、灰密影響,提出了推薦的500kV變電設(shè)備帶電水沖洗方法,500kV變電站試驗(yàn)場和運(yùn)行中500kV變電站現(xiàn)場帶電水沖洗驗(yàn)證了方法有效性和安全性。 500kV變電設(shè)備帶電水沖洗裝置方面,針對500kV變電設(shè)備帶電水沖洗采用多槍時(shí)序沖洗存在槍數(shù)多、沖洗行程長、沖洗時(shí)間短、同步配合要求高的特點(diǎn),在實(shí)現(xiàn)人員配合沖洗的基礎(chǔ)上,基于機(jī)器人運(yùn)動控制策略、攝影測量及PLC計(jì)算機(jī)觸摸屏技術(shù),開發(fā)了大車車載平臺機(jī)器人帶電水沖洗裝置和小車車載平臺機(jī)器人帶電水沖洗裝置,提出了兩大車機(jī)器人沖洗、1大車4人沖洗、1大車2人2機(jī)器人沖洗、1大車兩小車機(jī)器人沖洗等多種作業(yè)模式,實(shí)現(xiàn)了包括車載平臺、機(jī)械臂、攝影測量裝置、水射流控制裝置等硬件設(shè)備在內(nèi)的整體集成,解決了機(jī)械臂運(yùn)動、出入倉、行程控制、攝影測量定位等關(guān)鍵技術(shù)難題,實(shí)現(xiàn)了單個(gè)或多組機(jī)械臂帶動水槍按照標(biāo)準(zhǔn)沖洗程序?qū)δ繕?biāo)絕緣子實(shí)施自動沖洗,有力提高了作業(yè)安全性和自動化水平。 在500kV變電站試驗(yàn)場和運(yùn)行中的500kV變電站開展了對500kV斷路器、500kV單支柱絕緣子、500kV刀閘并列支柱絕緣子、HGIS套管和CVT現(xiàn)場帶電水沖洗,驗(yàn)證500kV變電設(shè)備帶電水沖洗模式有效性和安全性�；谘芯砍晒幹仆瓿闪宋覈谝徊俊�500kV輸變電設(shè)備帶電水沖洗作業(yè)技術(shù)規(guī)范》電力行業(yè)標(biāo)準(zhǔn),規(guī)范了500kV典型變電設(shè)備沖洗方法。
[Abstract]:Power transmission equipment insulation flashover is a major threat to China's safe running of power system, electric water flushing is an important method to prevent pollution flashover, at 220kV and below voltage has been widely used, and 500kV substation equipment hotwashing had not been carried out, the basic theory research and engineering practice is still blank. According to the 500kV substation of hotwashing technology is studied, including the 500kV substation equipment of hotwashing jet characteristics and cleaning efficiency, hotwashing water insulation, hotwashing pillar insulation, flushing of charged water, equipment and engineering applications, the research results have been applied and verified in engineering practice.
Hotwashing jet characteristics and cleaning efficiency, combined with the basic theory of water jet dynamics, carried out numerical simulation of hotwashing and photographic observation structure of jet formation, the hotwashing jet form, column width and water jet velocity distribution, observation found water jet rich forms of different distance, is proposed hotwashing water jet structure model was established. The outdoor hotwashing test field, put forward hotwashing blow force and cleaning efficiency testing method, carry out the vehicle mechanical arm washing and cleaning efficiency test stand flush on the ground, the hotwashing jet impact force and cleaning efficiency and outlet pressure, nozzle diameter the water column length, quantitative rules, operation mode and flushing angle, laid the foundation for 500kV hotwashing theory of jet.
500kV substation equipment hotwashing water insulation, carried out 500kV hotwashing water power frequency leakage current and switching impulse discharge characteristics test, the water power frequency leakage current, switching impulse discharge voltage and water resistivity, water column length, diameter of the nozzle, the quantitative law of pressure and other parameters are proposed to control the 500kV in hot water flushing water insulation safety water column length value, verified the reasonableness of the regulation.
500kV substation equipment charged water washing method, system to carry out a 500kV gun and the four gun hotwashing in contrast to the 76 conditions will test, insulator leakage current waveform characteristics for insulation hotwashing quantitative safety evaluation, found hotwashing current amplitude sudden leakage in the process of increasing the phenomenon. Wash the curve of current amplitude changes in the whole process and different irrigation stage hotwashing characteristics of leakage current, compares the four different washing gun, gun safety methods and different ESDD, NSDD, proposed the 500kV substation equipment charged water washing method, 500kV test and field operation in 500kV substation substation in hot water flushing verified the effectiveness and safety of the method.
500kV substation equipment charged water washing device, according to the 500kV substation equipment hotwashing using multi gun timing flushing gun there is more, washing stroke length, washing time is short, synchronized with the characteristics of high requirement, in the implementation of personnel with the washing on the basis of the robot motion control strategy based on Photogrammetry and computer touch screen PLC the development of technology, the vehicle platform robot charged water washing device and car vehicle platform robot charged water washing device, the two car 1 car 4 robot wash, rinse, 1 car 2 2 1 car two car washing robot, robot and other washing operations, including the realization of the vehicle platform, manipulator, photography measuring device, control device hardware water jet equipment, the overall integration, solves the problem of mechanical arm movement, chamber, stroke control, key technical problems of photogrammetric positioning etc., A single or multiple group of mechanical arms is driven to drive the water gun to automatically clean the target insulator according to the standard flushing procedure, which improves the operation safety and automation level.
500kV substation in 500kV substation and the operation of the field test was carried out on the 500kV circuit breaker, 500kV single insulators, 500kV switch parallel insulators, HGIS tube and the CVT site of hotwashing, verification of 500kV substation equipment hotwashing mode is effective and safety. Based on the research results to complete the preparation of China's first <500kV transmission equipment hotwashing technical specification > operating power industry standard specification, 500kV typical substation equipment washing method.

【學(xué)位授予單位】：武漢大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TM84

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本文編號：1647638