酒泉750 kV超高壓換流站關(guān)鍵設(shè)備試驗(yàn)技術(shù)研究

 

陳仕彬¹，王曉飛¹，呂斌²，楊玉庭²，史萬(wàn)偉²

（1 國(guó)網(wǎng)甘肅省電力公司電力科學(xué)研究院，甘肅 蘭州 730050；2 蘭州隴能電力科技有限公司，甘肅 蘭州 730050）

 

    摘 要：針對(duì)于750 kV超高壓（EHV）換流站關(guān)鍵設(shè)備的安裝可靠性和穩(wěn)定運(yùn)行情況，提出一種能夠?qū)崿F(xiàn)750 kV電壓等級(jí)EHV換流站關(guān)鍵設(shè)備性能測(cè)試的方法，該方法綜合考慮試驗(yàn)效率和成本經(jīng)濟(jì)性，綜合選取了試驗(yàn)電源的最佳接入點(diǎn)并設(shè)計(jì)了對(duì)應(yīng)的接線方式，并以此為基礎(chǔ)構(gòu)建了換流站關(guān)鍵設(shè)備通流時(shí)的短路電流計(jì)算模型，根據(jù)計(jì)算結(jié)果對(duì)換流站關(guān)鍵設(shè)備通流所需的試驗(yàn)電源和試驗(yàn)用表進(jìn)行了優(yōu)化選擇，以EHV換流站調(diào)相機(jī)系統(tǒng)和電流互感器（CT）為研究對(duì)象，對(duì)其保護(hù)配置穩(wěn)定運(yùn)行情況、極性正誤、變比結(jié)果及相位偏置情況進(jìn)行了分析，通過(guò)對(duì)酒泉750 kV換流站的調(diào)相機(jī)系統(tǒng)和CT進(jìn)行通流試驗(yàn)，實(shí)驗(yàn)結(jié)果表明，提出的方法經(jīng)過(guò)一次通流即可使短路電流通過(guò)調(diào)相機(jī)系統(tǒng)母線、短引線、主變壓器及調(diào)相機(jī)CT，首次實(shí)現(xiàn)了國(guó)內(nèi)750 kV電壓等級(jí)EHV換流站調(diào)相機(jī)系統(tǒng)等關(guān)鍵設(shè)備的順利調(diào)試。

    關(guān)鍵詞：酒泉換流站；調(diào)相機(jī)系統(tǒng)；短路電流；通流試驗(yàn)

    中圖分類(lèi)號(hào)：TM835     文獻(xiàn)標(biāo)識(shí)碼：A     文章編號(hào)：1007-3175(2019)11-0053-04

    Abstract: Aiming at the installing reliability and stability situation of key equipments in 750 kV EHV converter station, this paper proposed a kind of method to realize the key equipments performance test in EHV converter station of 750 kV voltage classes. This method comprehensively considered the test efficiency and economy of the test, selected the optimum access point of experimental power supply and designed the corresponding wiring mode.On the basis of this, this paper established the short circuit calculation model when there were currents passing through in the key equipment of EHV converter station. According to the calculation result, this paper carried out the optimization selection for the testing power supply and forms needed when there were currents passing through in the key equipment of EHV converter station.Taking the synchronous condenser system of EHV converter station and CT as the research object, this paper analyzed its protection configuration stable operation situation, polarity true-false, turns ratio result and phase bias situation.The synchronous condenser system in 750 kV EHV converter station of Jiuquan and the CT were carried out currents passing through tests.The experimental results show that one time currents passing through can make the short circuit get through the synchronous condenser system busbar, the short leg, the main transformer and the synchronous condenser CT.It is the first time that the synchronous condenser systems in EHV converter station of 750 kV voltage classes at home etc key equipments have been debugged smoothly.

    Key words: Jiuquan converter station; synchronous condenser system; short circuit current; flow-through test