Effect of Sampling Rate and Sensor Bandwidth on Measured Transient Signals in LV AC and DC Power Systems
Effect of Sampling Rate and Sensor Bandwidth on Measured Transient Signals in LV AC and DC Power Systems
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DOI：
10.1109/amps55790.2022.9978743
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发表时间：
2022-09
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影响因子：
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通讯作者：
Yljon Seferi;Arshad;M. Syed;G. Burt;B. Stewart
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作者：
Yljon Seferi;Arshad;M. Syed;G. Burt;B. Stewart
电力系统中的冲动瞬变会强调设备电绝缘的状态。信号特征的知识对于准确评估其对电绝缘的影响至关重要。本文研究了采样率和传感器带宽对捕获高频瞬态干扰及其在实验室规模LV AC和DC系统中的特征，以增加对它们对电绝缘材料的影响的理解。在直流电动弧故障和双向电力电力转换器的AC输出之后，已同时使用了两个不同带宽和可配置的采样率的测量系统，最高可达500 ks/s，高达500 ks/s和高达250 ms/s。在AC和DC记录的信号中发现，相对于系统的考虑电压的幅度的不明高频瞬态信号超过10％和600％以上。在实验上建立了三个依赖性曲线，这些依赖性曲线与最大电压，瞬变速率和瞬态脉冲持续时间与不同的采样率建立，以改善对瞬态特性的欣赏以及对它们对电气绝缘系统的影响的更好相关性。
Impulsive transients in power systems can stress the state of electrical insulation of equipment. Knowledge of signal characteristics is of paramount importance to accurately assess their impact on electrical insulation. This paper investigates the effect of sampling rate and sensor bandwidth on capturing high-frequency transient disturbances and their characteristics in laboratory-scale LV AC and DC systems to increase the understanding of their impact on electrical insulation. Two measurement systems of different bandwidths and configurable sampling rates, up to 500 kS/s and up to 250 MS/s, have been used in parallel to capture and compare the high-frequency transient phenomenon in voltage signals following DC series electric arc faults and the AC output of a bi-directional power converter. The presence of unknown high-frequency transient signals of magnitudes more than 10% and more than 600% with respect to the considered voltage of the system were found to exist in AC and DC recorded signals, respectively. Three dependency curves relating the maximum voltage, the rate-of-rise, and the pulse duration of the transients to different sampling rates are experimentally established to provide an improved appreciation of transient characteristics and a better correlation of their impact on the electrical insulation systems.