Fault detection in direct current transmission lines using discrete fourier transform from single terminal current signals

2017 1st International Conference on Electronics, Materials Engineering and Nano-Technology (IEMENTech) Pub Date : 2017-04-28 DOI:10.1109/IEMENTECH.2017.8076975

S. Agarwal, A. Swetapadma, C. Panigrahi, A. Dasgupta

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引用次数: 10

Abstract

Line commutated converter based high voltage transmission line fault current rises instantly due to the absence of inductance as which is present in ac. In dc currents there is no natural current zero so interruption of current is difficult and therefore the focus of the paper is to identify the fault in less time so that trip command can be initiated to the dc breaker. The dc lines are economical for long length so at far end distance fault identification is essential. The converter control in dc transmission lines control the power and provides synchronous interconnection between two ac systems. The discrete Fourier transform is used to extract the dc current at rectifier end of the dc transmission line and the processed current is compared with the threshold value to identify the fault. The factors considering the effect of fault location and fault resistance are considered for the accuracy, reliability and selectivity.

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用离散傅里叶变换对单端电流信号进行直流输电线路故障检测

基于线路换向变换器的高压输电线路由于没有电感，故障电流瞬间上升，而在交流电流中存在。在直流电流中没有自然电流零，因此电流中断是困难的，因此本文的重点是在更短的时间内识别故障，以便对直流断路器发起跳闸命令。直流线路在较长的线路中是经济的，因此在远端距离故障识别是必不可少的。直流输电线路中的变换器控制控制功率并提供两个交流系统之间的同步互连。利用离散傅里叶变换提取直流传输线整流端的直流电流，并将处理后的电流与阈值进行比较，从而识别故障。考虑了故障定位和故障电阻的影响因素，提高了系统的准确性、可靠性和选择性。

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2017 1st International Conference on Electronics, Materials Engineering and Nano-Technology (IEMENTech)

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