【摘要】：針對(duì)目前線路電流差動(dòng)保護(hù)普遍使用的基于內(nèi)部時(shí)鐘同步方法,分析了基于乒乓原理測(cè)量通道時(shí)延的內(nèi)部時(shí)鐘同步方法在出現(xiàn)通道路由不一致時(shí),會(huì)造成差動(dòng)保護(hù)不正確動(dòng)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(shí)結(jié)合線路兩側(cè)的電氣量同步判據(jù),能夠可靠識(shí)別出線路電流差動(dòng)保護(hù)同步異常的情況。在內(nèi)部時(shí)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(shí)鐘的自校正同步策略,該策略能夠自動(dòng)完成同步狀態(tài)辨識(shí),提高了差動(dòng)保護(hù)抗通道收發(fā)路由不一致的能力。實(shí)驗(yàn)驗(yàn)證表明,所提出的基于多維度相互校驗(yàn)的電流差動(dòng)保護(hù)自校正同步策略能夠提高線路電流差動(dòng)保護(hù)抗通道擾動(dòng)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(guó)網(wǎng)浙江省電力公司;國(guó)網(wǎng)浙江省電力公司臺(tái)州供電公司;
【分類號(hào)】：TM773

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本文編號(hào)：2430563