【摘要】：針對目前線路電流差動保護普遍使用的基于內(nèi)部時鐘同步方法,分析了基于乒乓原理測量通道時延的內(nèi)部時鐘同步方法在出現(xiàn)通道路由不一致時,會造成差動保護不正確動作的可能性。提出了一種自適應(yīng)的異常差流監(jiān)視手段,同時結(jié)合線路兩側(cè)的電氣量同步判據(jù),能夠可靠識別出線路電流差動保護同步異常的情況。在內(nèi)部時鐘同步的基礎(chǔ)上,提出了一種結(jié)合電氣量判據(jù)及外部時鐘的自校正同步策略,該策略能夠自動完成同步狀態(tài)辨識,提高了差動保護抗通道收發(fā)路由不一致的能力。實驗驗證表明,所提出的基于多維度相互校驗的電流差動保護自校正同步策略能夠提高線路電流差動保護抗通道擾動的能力。
[Abstract]:Aiming at the internal clock synchronization method commonly used in line current differential protection at present, the internal clock synchronization method based on ping-pong principle to measure channel delay is analyzed when the path is inconsistent. The possibility that differential protection will not operate correctly. An adaptive monitoring method for abnormal differential current is presented in this paper. At the same time, combining with the criterion of electric volume synchronization on both sides of the line, the synchronization anomaly of line current differential protection can be reliably identified. On the basis of internal clock synchronization, a self-tuning synchronization strategy combining electric quantity criterion and external clock is proposed. This strategy can automatically complete synchronization state identification and improve the ability of differential protection against inconsistent routing of channels. The experimental results show that the proposed self-tuning synchronization strategy for current differential protection based on multi-dimensional mutual verification can improve the ability of line current differential protection against channel disturbance.
【作者單位】： 南京南瑞繼保電氣有限公司;國網(wǎng)浙江省電力公司;國網(wǎng)浙江省電力公司臺州供電公司;
【分類號】：TM773

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本文編號：2430563