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基于故障电压比较的广域后备保护新算法

, PP. 274-283

Keywords: 故障元件识别,故障区域检测,故障电压比值系数,有限广域,广域后备保护

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Abstract:

提出了一种基于故障电压比较的广域后备保护新算法,有助于解决传统后备保护整定配合复杂,潮流转移时易误动等问题。该算法利用线路一侧电压、电流故障分量的测量值推算另一侧电压故障分量,以推算值与测量值的比值识别故障元件。并通过故障区域检测降低广域信息传输量,加快故障元件识别速度。该算法原理简洁,对保护范围内多点量测数据的同步性要求较低。基于川渝500kV电网测试系统的仿真结果表明,该算法在电网高阻接地、非全相运行、故障转换及重负荷转移等情况下均具有良好的动作性能。

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