Long-distance power transmission requires durable and high-performance cables with insulators resistant to dielectric breakdown. However, space charge can cause dielectric breakdowns by affecting the electrical characteristics inside the insulator as it is injected, generated, or moved inside the insulating materials. In this study, the sheet-like space charge distribution of the insulator cross-linking polyethylene (XLPE) was measured using the pulsed electro acoustic (PEA) method. As compared to the existing method, a more convenient method was designed and produced using NI’s PXI System and LabVIEW software. Furthermore, a signal calibration program was developed to correct the distortions of the measured signals. The accuracy and reliability of the space charge distribution signals were improved by correcting the distortions of the signals.

中文翻译：

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用PEA法测量绝缘子交联聚乙烯的片状空间电荷分布和信号校准

长距离电力传输需要耐用且高性能的电缆，其绝缘体可抵抗介电击穿。然而，空间电荷在注入、生成或移动到绝缘材料内部时会影响绝缘体内部的电气特性，从而导致介电击穿。在这项研究中，使用脉冲电声 (PEA) 方法测量了绝缘体交联聚乙烯 (XLPE) 的片状空间电荷分布。与现有方法相比，使用NI 的PXI 系统和LabVIEW 软件设计和生成了一种更方便的方法。此外，还开发了一个信号校准程序来校正测量信号的失真。通过对信号失真进行校正，提高了空间电荷分布信号的准确性和可靠性。