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电网技术  2013 

适应直流偏磁抑制装置接入的零序电抗继电器动作特性分析

, PP. 2926-2931

Keywords: 电阻型直流偏磁抑制装置,零序电抗继电器,相间阻抗继电器

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Abstract:

讨论了电阻型直流偏磁抑制装置接入对线路距离保护的影响,针对由抑制装置引发的保护拒动或误动问题,提出一种将零序电抗继电器与相间阻抗继电器相结合的保护方案,相间故障采用相间阻抗继电器,接地故障采用零序电抗继电器,并给出了相应判据的整定计算方法。PSCAD仿真结果表明,此方案能够在一定程度上对直流偏磁抑制装置接入后的线路不对称故障进行有效保护。

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