The present Special Issue is devoted to papers, which deal with the subjects of liquid dielectrics. Most of the papers included in the present Special Issue are concerned with innovative insulating liquids belonging to the family of natural and synthetic esters. The large interest in ester liquids is due to their positive property to have a much higher flash points and fire points of over 300 °C, almost two times more than traditional mineral oils; in addition, natural esters are readily biodegradable and come from renewable resources, made out of seed crops, such as soybeans. In fact, scientific researches on advances related to these liquids are needed for the development of safer power transformers as essential part of the forthcoming announced green-economy, now no longer postponed for the benefit of our planet. The main validation points for these innovative liquids remain their dielectric behavior and their aging performance and for this reason outstanding researches are still going on. Other papers included in this Special Issue deal with important studies related to breakdown, partial discharge (PD) and the effort made worldwide to improve the liquid insulation properties through the use of innovative nanomaterial additives.

中文翻译：

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液体电介质

本期特刊专门讨论有关液体电介质主题的论文。本期特刊中的大多数论文都与属于天然和合成酯类的创新绝缘液体有关。对酯类液体的巨大兴趣是因为它们的闪点和燃点高得多，燃点超过 300 °C，几乎是传统矿物油的两倍；此外，天然酯易于生物降解，来自可再生资源，由大豆等种子作物制成。事实上，需要对与这些液体相关的进展进行科学研究，以开发更安全的电力变压器，作为即将宣布的绿色经济的重要组成部分，现在不再为造福我们的星球而推迟。这些创新液体的主要验证点仍然是它们的介电行为和老化性能，因此出色的研究仍在进行中。本特刊中包含的其他论文涉及与击穿、局部放电 (PD) 相关的重要研究，以及全球范围内通过使用创新的纳米材料添加剂改善液体绝缘性能的努力。