本文選題：特高壓直流輸電　切入點(diǎn)：直流換流閥　出處：《中國(guó)電力科學(xué)研究院》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：2015年,國(guó)家電網(wǎng)公司在提出全球能源互聯(lián)的構(gòu)想,其中的全球能源互聯(lián)與“一極一道(北極與赤道附近)”中能源傳輸需要大容量遠(yuǎn)距離輸電技術(shù)。同時(shí)國(guó)家提出的“西電東送”戰(zhàn)略,也需要大容量遠(yuǎn)距離輸電技術(shù)。特高壓直流輸電技術(shù)因其投資少、輸送距離長(zhǎng)、輸送容量大等優(yōu)點(diǎn)成為必然選擇。換流閥作為高壓直流輸電系統(tǒng)的“心臟”,其能否長(zhǎng)期可靠運(yùn)行,是決定直流輸電系統(tǒng)是否可靠運(yùn)行的關(guān)鍵。在投入工程前,必須對(duì)閥開展全面的試驗(yàn)工作,檢驗(yàn)其產(chǎn)品性能。IEC60700對(duì)閥試驗(yàn)作出了要求,但偏向于試驗(yàn)參數(shù)計(jì)算等籠統(tǒng)的要求,不夠細(xì)致和完善。本文依托巴西美麗山Ⅰ期±800kV、準(zhǔn)東至皖南±1100kV特高壓直流輸電工程試驗(yàn),開展了特高壓換流閥試驗(yàn)中電壓最高的多重閥試驗(yàn)方法的研究工作。本文分析了換流閥在運(yùn)行工況中需耐受的直流、操作、雷電等各類過電壓應(yīng)力,并結(jié)合IEC60700標(biāo)準(zhǔn)和換流閥招標(biāo)技術(shù)規(guī)范中關(guān)于試驗(yàn)的規(guī)定,提煉了多重閥試驗(yàn)的具體要求,為試驗(yàn)方法研究及裝置設(shè)計(jì)奠定了基礎(chǔ)。結(jié)合電力系統(tǒng)電力電子實(shí)驗(yàn)室實(shí)際情況,分析了采用等效負(fù)載方式完成試驗(yàn)的可行性,并提出了首個(gè)高等效性等效負(fù)載拓?fù)?解決了具有時(shí)變特性飽和電抗器等效的難題。同時(shí)設(shè)計(jì)了新型試驗(yàn)拓?fù)?解決了需補(bǔ)能換流閥在試驗(yàn)過程中涉及的多應(yīng)力源之間保護(hù)問題。參考國(guó)內(nèi)外多個(gè)工程換流閥試驗(yàn)參數(shù),完成了多重閥試驗(yàn)用直流、沖擊試驗(yàn)裝備及等效負(fù)載的研制。其中重點(diǎn)介紹了等效負(fù)載的電氣與結(jié)構(gòu)設(shè)計(jì),并運(yùn)用電容補(bǔ)償?shù)碾妷簻y(cè)量方法,解決了雜散參數(shù)對(duì)換流閥與等效負(fù)載串聯(lián)分壓的影響。最后,將本文所研究多重閥試驗(yàn)方法及試驗(yàn)設(shè)備具體實(shí)施于上述兩個(gè)特高壓工程中,順利完成了兩項(xiàng)工程的試驗(yàn),驗(yàn)證了本文研究工作的合理性和正確性。
[Abstract]:In 2015, State Grid put forward the idea of global energy connectivity. Among them, global energy interconnection and energy transmission in "one pole (near the Arctic and the equator)" require large capacity long-distance transmission technology. At the same time, the national strategy of "power transmission from west to east" is proposed. UHVDC transmission technology is also needed because of its low investment and long transmission distance. As the heart of HVDC transmission system, whether the converter valve can operate reliably for a long time is the key to the reliable operation of HVDC system. It is necessary to carry out comprehensive test work on the valve to test its product performance. IEC 60700 has made requirements for the valve test, but it is biased towards the general requirements such as the calculation of test parameters. This paper relies on phase I 鹵800kV, quasi-east Anhui 鹵1100kV UHV HVDC project test, The research work on the test method of multiplex valve with the highest voltage in UHV converter valve test is carried out. In this paper, the overvoltage stresses of DC, operation, lightning and so on, which need to be tolerated in the operation condition of converter valve, are analyzed. Combined with the IEC60700 standard and the regulation of the test in the bidding technical specification of the converter valve, the specific requirements of the multi-valve test were refined, which laid the foundation for the research of the test method and the design of the device, and combined with the actual situation of the power electronic laboratory in the power system. The feasibility of using equivalent load to complete the test is analyzed, and the first high equivalence equivalent load topology is proposed, which solves the problem of equivalent saturation reactor with time-varying characteristics. At the same time, a new test topology is designed. The problem of protection between the multiple stress sources involved in the test process of the recharge converter valve is solved. With reference to the test parameters of many engineering converter valves at home and abroad, the DC for the test of the multiplex valve is completed. The development of shock test equipment and equivalent load. The electrical and structural design of equivalent load is emphatically introduced, and the effect of stray parameters on the series partial pressure of converter valve and equivalent load is solved by using the voltage measurement method of capacitance compensation. The multi-valve test method and test equipment studied in this paper are applied to the two UHV projects mentioned above, and the two projects are successfully completed, which verifies the reasonableness and correctness of the research work in this paper.
【學(xué)位授予單位】：中國(guó)電力科學(xué)研究院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM721.1

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