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首页> 外文期刊>Electric power systems research >PC based protective relaying algorithms for bus bars using digital filters
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PC based protective relaying algorithms for bus bars using digital filters

机译:使用数字滤波器的基于PC的母线保护继电保护算法

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The paper reports the development of protective relaying algorithms for bus bars using digital filters. An efficient algorithm based on the recursive constraint transfer function model of the IIR band-pass filter has been used to extract the 50 Hz frequency component for realizing the various protective functions for a bus bar. A fourth-order adaptive filter is used for tracking the centre frequency components of voltages and currents. The proposed relaying algorithms provide variable-bias differential protection logic coupled with undervoltage checkeutral current check features to ensure a high degree of reliability and freedom from unwanted tripping of circuit breakers. The developed algorithms have been tested with simulated input signals representing various normal and abnormal bus bar conditions and the scheme as a whole responded efficiently.
机译:该论文报告了使用数字滤波器的母线保护继电器算法的发展。基于IIR带通滤波器的递归约束传递函数模型的有效算法已被用于提取50 Hz频率分量,以实现母线的各种保护功能。四阶自适应滤波器用于跟踪电压和电流的中心频率分量。所提出的继电器算法提供了可变偏置差动保护逻辑以及欠压检查/中性点电流检查功能,以确保高度的可靠性和免受断路器意外跳闸的影响。已开发的算法已通过代表各种正常和异常母线状况的模拟输入信号进行了测试,并且该方案作为一个整体有效地做出了响应。

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