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首页> 外文会议>IEEE world conference on photovoltaic energy conversion;WCPEC;IEEE photovoltaic specialists conference;PVSC >Fault finding in a 1 MW photovoltaic plant by reflectometry
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Fault finding in a 1 MW photovoltaic plant by reflectometry

机译：通过反射法发现1 MW光伏电站中的故障

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Time Domain Reflectometry has been used for diagnostic monitoring of a large size photovoltaic (PV) plant in operating conditions. By analysing the waveforms obtained when a step-voltage excitation is propagated down the electrical line connecting the PV generators to the inverter, we were able to detect, identify and localise the most common fault conditions, such as breaks of the circuit, insulation defects, wiring anomalies. Best compromise between analysis time and precision was achieved by testing groups of three paralleled strings (panels): in this way we were able to detect in a short time whether a fault was present, while its position was separately determined with a good precision by repeating the test on the single strings. The whole 1 MW PV plant was tested in a couple of days. Finally, we discuss some economical aspects of this fault finding technique.
机译：时域反射仪已用于在运行条件下对大型光伏（PV）工厂进行诊断监视。通过分析阶跃电压激励沿将光伏发电机连接到逆变器的电线传播时获得的波形，我们能够检测，识别和定位最常见的故障情况，例如电路中断，绝缘缺陷，接线异常。通过对三个平行的字符串（面板）进行测试，可以在分析时间和精度之间取得最佳平衡：这样，我们能够在很短的时间内检测是否存在故障，而通过重复进行高精度地分别确定其位置对单个字符串的测试。整个1 MW光伏电站经过几天的测试。最后，我们讨论了这种故障查找技术的一些经济方面。

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