基于多维度相互校验的线路电流差动保护自校正同步策略
发布时间：2019-02-25 21:44
【摘要】：针对目前线路电流差动保护普遍使用的基于内部时钟同步方法,分析了基于乒乓原理测量通道时延的内部时钟同步方法在出现通道路由不一致时,会造成差动保护不正确动作的可能性。提出了一种自适应的异常差流监视手段,同时结合线路两侧的电气量同步判据,能够可靠识别出线路电流差动保护同步异常的情况。在内部时钟同步的基础上,提出了一种结合电气量判据及外部时钟的自校正同步策略,该策略能够自动完成同步状态辨识,提高了差动保护抗通道收发路由不一致的能力。实验验证表明,所提出的基于多维度相互校验的电流差动保护自校正同步策略能够提高线路电流差动保护抗通道扰动的能力。
[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.
【作者单位】： 南京南瑞继保电气有限公司;国网浙江省电力公司;国网浙江省电力公司台州供电公司;
【分类号】：TM773
[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.
【作者单位】： 南京南瑞继保电气有限公司;国网浙江省电力公司;国网浙江省电力公司台州供电公司;
【分类号】：TM773
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