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电网技术  2012 

融合轨迹预测技术的输电线路新型自适应重合闸

, PP. 209-215

Keywords: 自适应重合闸,广域量测系统,暂态稳定,轨迹预测

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Abstract:

输电线路故障的重合闸时刻对系统的暂态稳定有很重要的影响。针对目前最佳重合时刻难以在线确定的问题,提出融合轨迹预测技术的重合时刻在线捕捉方法。核心是利用机组功角的轨迹预测信息,确定系统振荡机组的主导模式,并按主导模式对机组进行分群,将多机系统复杂的暂态稳定性问题转化为对应的单机无穷大系统的功角稳定性分析,选其单机无穷大系统(onemachineinfinitebus,OMIB)映像的前3摆的平均稳定裕度作为确定最佳重合时刻的指标。由于映像系统功角的幅值与稳定裕度成反比,因此给出实用判据最佳重合时刻满足的条件为OMIB映像的前3摆功角幅度均值最小。最后给出了完整的设计方案。

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