1 000 kV特高壓同塔雙回線路正序參數(shù)測試技術(shù)
楊靖瑋1，王少華2，江寶3，崔竹葉2，李特2
(1 國網(wǎng)浙江嘉興供電公司，浙江 嘉興 314033；2 國網(wǎng)浙江省電力公司電力科學(xué)研究院，浙江 杭州
310014；3 國網(wǎng)安徽六安供電公司，安徽 六安 237006)
摘 要： 輸電線路正序參數(shù)是電網(wǎng)故障短路電流計算、短路接地故障點位置確定，正常運行時潮流、電壓損失計算，及繼電保護定值計算等工作的重要基礎(chǔ)。提出了1 000 kV 皖電東送特高壓同塔雙回線路皖南- 浙北段正序參數(shù)的測試方法，并進行了現(xiàn)場測試及數(shù)據(jù)分析。結(jié)果表明：采用大容量變頻電源和勵磁變試驗裝置，可提高測量信號與干擾信號間的信噪比，降低鄰近線路感應(yīng)電壓干擾對特高壓線路工頻參數(shù)測試的影響；采用并聯(lián)電容補償法和異頻法相結(jié)合的綜合測試方法，可降低阻抗參數(shù)測試時感應(yīng)電流的影響；皖南- 浙北特高壓線路正序參數(shù)宜采用異頻法得到的測試結(jié)果。
關(guān)鍵詞： 皖電東送；特高壓；同塔雙回；工頻參數(shù)；正序阻抗；正序電容
中圖分類號：TM726 文獻標識碼：B 文章編號：1007-3175(2014)11-0031-05
Positive Sequence Parameter Measurement Technology of 1 000 kV UHV Double-Circuit Transmission Line on Same Tower
YANG Jing-wei1, WANG Shao-hua2, JIANG Bao3, CUI Zhu-ye2, LI Te2
（1 State Grid Zhejiang Jiaxing Power Supply Company, Jiaxing 31 4033 , China; 2 State Grid Zhejiang Electric Power Research Institute, Hangzhou 31 0014, China; 3 State Grid Anhui Lu’an Power Supply Company, Lu’an 237006, China）
Abstract: Positive sequence parameters of transmission line are important foundation for short-circuit fault current calculation, shortcircuit ground fault location, power flow and voltage loss calculation, and relay protection setting calculation. Anhui-to-East ultra high voltage (UHV) power transmission line is the first 1 000 kV double-circuit line on the same tower in the world. The measuring method of positive sequence parameters of Wannan-Zhebei transmission line was proposed. The field test was implemented and the test data was analyzed. The results show that the use of large-capacity variable-frequency power source and excitation transformer can improve the signal-to-noise ratio of measuring signal to interfering signal. Then, the influence of interfering voltage induced by adjacent lines on the frequency parameter measurement of UHV transmission line can be reduced. The combined use of parallel capacitance compensation method and non-power frequency method can reduce the influence of the induced current when measuring the impedance parameter. For the positive sequence parameter test of Wannan-Zhebei UHV transmission line, it is appropriate to adopt the test results obtained by non-power frequency method.
Key words: Anhui-to-East power transmission; ultra high voltage; double-circuit line on same tower; frequency parameter; positive sequence impedance; positive sequence capacitance
參考文獻
[1] 劉振亞. 特高壓電網(wǎng)[M]. 北京：中國經(jīng)濟出版社，2005.
[2] 劉遵義，盧明，呂中賓，等. 特高壓交流輸電線路工頻參數(shù)測量技術(shù)及應(yīng)用[J]. 電網(wǎng)技術(shù)，2009，33(10)：59-62.
[3] 劉娟，李長益.輸電線路工頻參數(shù)測量時的感應(yīng)電壓影響及消除[J].電力建設(shè)，2003，24(8)：33-34.
[4] 陳繼東，劉晉，吳伯華，等.500 kV 平行線路干擾對工頻參數(shù)測量影響的研究[J]. 華中電力，2008，21(6)：11-14.
[5] 焦陽.輸電線路工頻參數(shù)抗干擾測量方法研究[D].北京：華北電力大學(xué)，2005.
[6] 鄭釧，蔡金錠.輸電線路工頻參數(shù)影響因素的量化研究[J].高電壓技術(shù)，2008，34(4)：813-815.
[7] 吳湘貴.高壓輸電線路工頻參數(shù)抗干擾測量與分析[J].貴州電力技術(shù)，2008，32(12)：31-32.
[8] 馬俊杰，吳伯華.架空輸電線路工頻參數(shù)測量干擾分析及對策[J].華中電力，2010，23(3)：6-9.
[9] 楊經(jīng)超，尹項根，王志華，等. 強干擾環(huán)境下輸電線路工頻參數(shù)測試的應(yīng)用[J]. 電力系統(tǒng)自動化，2008，32(18)：67-70.
