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摘要母线是电力系统中的重要组成部分，如果母线发生故障，将对整个电力系统产生严重的影响。因此，母线保护是非常重要的。 本文介绍了一种基于故障分量综合阻抗的母线保护原理。故障发生在母线外时，综合阻抗的幅值很大。故障发生在母线内部时，综合阻抗的幅值很小。本原理通过比较综合阻抗幅值的大小来判断是否发生母线故障，并选择出故障相。
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本文用 MATLAB中的 Simulink对原理进行仿真，验证了原理的正确性与可行性。同时经仿真分析，本原理具有较高的抗过渡电阻能力和一定的抗电流互感器饱和能力。在母线采用 3/2 断路器接线方式，且母线故障有电流流出的情况下，本原理也能够区分出母线故障，具有很高的灵敏性。21139
关键词：故障分量 母线保护 综合阻抗 Simulation
Title A Novel Busbar Protection Based on Fault Component Integrated Impedance
Abstract
Busbar is one of the most important components in the power system, and
whether it working normally or not has significant influence on the safety
and stability of the power system.So the busbar protection is important.
In this paper, a novel Busbar protection-a novel busbar protection based
on fault component integrated impedance is introduced. When a fault occurs
outside of the busbar , the amplitude of integrated impedance is large.
When a fault occurs on the busbar, the amplitude of integrated impedance
is small. By comparing the value of the amplitude of the integrated
impedance, it is easy to know whether the fault occures on the busbar or
not.
The results of the Simulink simulation show the correctness and the
feasibility of the theory. What’s more, from the simulation analysis, it
is verified that the principle has a high ability to resist undue resistance
and resistance of certain capacities of current transformer saturation .In
a ddition ,in the case that the busbar is connected by 3/2 circuit
breaker ,when fault occurs on the busbar , and there is current following
out of the busbar, the principle is also correct, and has a high degree
of sensitivity.
Keywords：Fault Component Busbar Protection Integrated Impedance Simulation
目 录
1 绪论 1
1.1 母线保护的意义 . 1
1.2 母线保护的发展现状 . 3
1.3 论文的主要研究内容 . 5
2 基于故障分量综合阻抗母线保护的基本原理 7
2.1 故障分量综合阻抗的定义 . 7
2.2 母线外部故障时的故障分量综合阻抗 . 9
2.3 母线内部故障时的故障分量综合阻抗 10
2.4 基于故障分量综合阻抗的母线保护原理 11
2.5 小结 11
3 仿真分析 . 12
3.1 仿真模型和算法 12
3.2 结果分析 16
3.3 小结 21
4 性能分析 . 22
4.1 经过渡电阻接地 22
4.2 3/2断路器接线 25
4.3 抗电流互感器饱和 29
4.4 小结 32
结论 33
致谢 34
参考文献 35