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首页> 外文期刊>Electric power systems research >Lightning overvoltages on a DC transmission line, calculated based on measured bipolar lightning strokes
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Lightning overvoltages on a DC transmission line, calculated based on measured bipolar lightning strokes

机译：直流传输线上的雷电过电压，基于测量的双极闪电冲程计算

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摘要

A key principle of insulation coordination is to compare the stress which could potentially be applied to equipment when it is in service with its withstand level. The withstand level is known based on standard tests. For AC systems an important knowledge exists at international level and numerous reference documents are available. In addition, the IEC 60,071 has standardized the rated impulse withstand voltage to be used for equipment and proposed for each value of highest voltage for equipment preferential values regarding impulse withstand voltage. The situation is not the same for DC systems. Less experience has been shared within the international community and there is no standardization of the withstand voltage. In addition, with regard to AC lines their structure is different. All these elements lead to a careful reassessment of hypotheses, which are usually accepted as valid when performing AC system insulation coordination studies. In this paper, the influence of lightning current shape on overvoltage is examined. A 500 kV bipolar DC overhead line is considered. The overvoltages due to bipolar lightning strokes based on measurements are calculated. Measurements available in literature have been used. These overvoltages are compared with calculations based on the use of the CIGRE wave shape as it is usually the case when performing insulation coordination studies and analyzed from an insulation coordination point of view.
机译：绝缘协调的关键原理是比较在其耐受水平的服务中可能适用于设备的应力。基于标准测试，已知耐受级别。对于AC系统，国际一级存在重要知识，可提供许多参考文件。此外，IEC 60,071已标准化了用于设备的额定脉冲耐受电压，并为设备优先值的每个值提出关于脉冲耐受电压的每个值。直流系统的情况不相同。在国际社会中共享较少的经验，没有耐压标准化。此外，关于交流线，它们的结构不同。所有这些元素都会导致对假设的仔细重新评估，这通常被接受在执行交流系统绝缘协调研究时被接受。在本文中，检查了雷电流形状对过电压的影响。考虑了500 kV双极直流架空线。计算基于测量的双极闪电冲程引起的过电压。使用文献中可用的测量。这些过电压与基于CIGRE波形的计算进行比较，因为在执行绝缘配位研究并从绝缘配位观察分析时通常是这种情况。

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