發(fā)布時(shí)間：2018-04-27 18:46

  本文選題：風(fēng)電 + T接線路��； 參考：《電網(wǎng)技術(shù)》2017年05期

【摘要】：風(fēng)電T接線路的保護(hù)受風(fēng)電故障特征、T接線路拓?fù)涞纫蛩赜绊?整定與配合困難,研究其對(duì)系統(tǒng)的安全穩(wěn)定運(yùn)行意義重大。利用三側(cè)電壓幅值差和測(cè)量阻抗特征,提出了一種適用于風(fēng)電T接線路的縱聯(lián)保護(hù)新方案。首先,研究了傳統(tǒng)距離保護(hù)在風(fēng)電T接線路中的適應(yīng)性,并指出其存在的不足。其次,從T接線路拓?fù)涑霭l(fā),利用三端正序電壓、正序電流關(guān)系,提出綜合電壓幅值差主判據(jù)。再次,立足于測(cè)量阻抗特征,提出自適應(yīng)距離輔助判據(jù)以消除主判據(jù)盲區(qū)。該保護(hù)方案能夠?qū)崿F(xiàn)全線速動(dòng),受風(fēng)電故障特征和T接線路拓?fù)溆绊懶�、耐過(guò)渡電阻能力強(qiáng)、對(duì)數(shù)據(jù)同步性要求低。最后,對(duì)所提方案進(jìn)行仿真建模,仿真結(jié)果驗(yàn)證了方案的可靠性和有效性。
[Abstract]:The protection of wind power T-connection line is affected by the wind power fault characteristics and the topology of the T-connection line, so it is difficult to set up and cooperate with each other. It is of great significance to study the protection of wind power T-connection line for the safe and stable operation of the system. Based on the characteristics of voltage amplitude difference and impedance measurement, a new scheme of longitudinal protection for wind power T-connection line is proposed. Firstly, the adaptability of traditional distance protection in wind power T line is studied, and its shortcomings are pointed out. Secondly, based on the topology of the T-connection line, the main criterion of the amplitude difference of the integrated voltage is proposed by using the three-terminal positive sequence voltage and the positive sequence current relationship. Thirdly, based on the characteristics of measurement impedance, an adaptive range-aided criterion is proposed to eliminate the blind area of the main criterion. This protection scheme can realize the whole line quick movement, is little affected by wind power fault characteristics and T connection line topology, has strong resistance to transition, and has low requirement for data synchronization. Finally, the proposed scheme is simulated and modeled, and the simulation results verify the reliability and effectiveness of the proposed scheme.
【作者單位】： 新能源電力系統(tǒng)國(guó)家重點(diǎn)實(shí)驗(yàn)室(華北電力大學(xué));國(guó)網(wǎng)冀北電力有限公司電力科學(xué)研究院;
【基金】：國(guó)家重點(diǎn)研發(fā)計(jì)劃智能電網(wǎng)技術(shù)與裝備重點(diǎn)專項(xiàng)(2016YFB0900600)~~
【分類(lèi)號(hào)】：TM773;TM614

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