| 基于序分量综合阻抗的母线保护原理 |
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| 引用本文： | 邓旭阳,索南加乐,王志恩,侯卓. 基于序分量综合阻抗的母线保护原理[J]. 电网技术, 2011, 0(7) |
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| 作者姓名： | 邓旭阳 索南加乐 王志恩 侯卓 |
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| 作者单位： | 西安交通大学电气工程学院; |
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| 基金项目： | 国家重点基础研究发展计划(973计划)(2009CB219704); 国家自然科学基金重点项目(51037005)~~ |
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| 摘 要： | 提出了母线正序故障分量综合阻抗、负序综合阻抗和零序综合阻抗的概念,通过分析母线区内、外故障时3种综合阻抗的特征,分别利用阻抗幅值和相角构成了基于正序故障分量综合阻抗、负序综合阻抗以及零序综合阻抗的母线保护原理。3种保护原理在母线区内、外故障时特征明显,判据简单、易整定,而且原理本身不受3/2断路器接线的母线区内故障汲出电流以及过渡电阻的影响。当母线区外故障电流互感器(TA)饱和时,利用各个序分量综合阻抗相角所构成的TA饱和识别判据能够可靠地将母线保护闭锁,从而避免保护误动;当母线区内发生故障有TA饱和时,保护性能不受影响,能够可靠地快速动作。基于正序故障分量综合阻抗的母线保护原理可以反映各种类型的母线故障,对于最严重的三相短路故障可以快速切除;基于负序、零序综合阻抗的母线保护原理则可以在故障后长期应用,不受系统振荡的影响,而且对于高阻接地故障依然能灵敏动作。3种保护原理可构成完整的母线保护方案。EMTP仿真结果验证了新原理的有效性和可行性。
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| 关 键 词： | 母线保护 序分量 综合阻抗 电流互感器饱和 3/2断路器接线 |
A Novel Busbar Protection Based on Sequence Component Integrated Impedance |
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| DENG Xuyang,SUONAN Jiale,WANG Zhien,HOU Zhuo. A Novel Busbar Protection Based on Sequence Component Integrated Impedance[J]. Power System Technology, 2011, 0(7) |
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| Authors: | DENG Xuyang SUONAN Jiale WANG Zhien HOU Zhuo |
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| Affiliation: | DENG Xuyang,SUONAN Jiale,WANG Zhien,HOU Zhuo(School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,Shaanxi Province,China) |
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| Abstract: | The concepts of integrated impedance of positive-sequence bus-bar fault component and those of negative-sequence integrated impedance and zero-sequence integrated impedance are proposed.By means of analyzing the characteristics of above-mentioned integrated impedances under the faults inside and outside the bus-bar protection zone,three bus-bar protection principles based on integrated impedance of positive-sequence bus-bar fault component and those of negative-sequence integrated impedance and zero-sequenc... |
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| Keywords: | bus-bar protection sequence component integrated impedance current transformer(CT) saturation breaker-and-a-half configuration |
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