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首页> 外文期刊>Arabian Journal for Science and Engineering. Section A, Sciences >Fault Detection During Asymmetrical Power Swing Using Superimposed Negative Sequence Current
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Fault Detection During Asymmetrical Power Swing Using Superimposed Negative Sequence Current

机译：使用叠加负序电流的不对称动力摆动期间的故障检测

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摘要

Power swing phenomenon occurred during single-pole auto-reclosing (SPAR) period is called asymmetrical power swing. During symmetrical power swing, power swing blocking is used to block distance relay to avoid the selectivity property. Therefore, fault detection is more challenging during asymmetrical power swing since open-pole condition introduces large amount of negative and zero sequence components in voltage and current signals. Further, fault detection during power swing and SPAR prevailed in a series compensated line is more challenging as the metal oxide varistor protecting series capacitor imposes other frequency components. In this paper, a new superimposed negative sequence (NS) current-based technique is proposed to detect the fault incepted in a series compensated line during asymmetrical power swing. The superimposed NS current is calculated using phasor difference between the fault and prefault NS currents. The proposed technique exploits the presence of substantial amount of superimposed NS current during asymmetrical power swing period to detect fault accurately. A summation index is used to declare the fault when it crosses the threshold value. Transient data, obtained from two systems simulated using PSCAD/EMTDC software, are used to test the performance of approach.
机译：单极自动重熔期间发生动力摆动现象（SPAR）时段称为不对称动力摆动。在对称动力摆动期间，动力摆动阻塞用于阻挡距离继电器以避免选择性属性。因此，在不对称动力摆动期间故障检测更具挑战性，因为开杆状态引入电压和电流信号中的大量负和零序列分量。此外，随着金属氧化物压敏电阻保护串联电容器施加其他频率分量，在串联补偿线中持续的动力摆动和翼梁期间的故障检测更具挑战性。本文提出了一种新的叠加负序列（NS）电流技术，以检测不对称动力摆动期间在串联补偿线中煅烧的故障。使用故障和预先预先溢出NS电流之间的Phasor差异来计算叠加的NS电流。所提出的技术利用在不对称动力摆动期间存在大量叠加的NS电流，以准确地检测故障。求和索引用于在交叉阈值时声明故障。从使用PSCAD / EMTDC软件模拟的两个系统获得的瞬态数据用于测试方法的性能。

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