This paper presents a new concept in underground medium voltage substations for an optimized operation performance and overall cost reduction. Due to its high-level embedded automation and communication systems, increased standards of reliability, availability and security are reached. Moreover, less expensive IP00 equipment can be used instead of higher IP-rated equipment, since the substation enclosure is hermetic and pressurized. Cost and time of construction works are reduced, as is the inconvenience to the population, especially when it comes to intense traffic areas. In addition, overall personnel labor is downsized, which reduces costs. In this context, the features and design guidelines of the proposed substation concept are presented, along with the methodology developed to address the thermal, structural and electric design issues.

中文翻译：

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地下，密闭，加压，隔离和自动化中压变电站的设计

本文提出了地下中压变电站的新概念，以优化运行性能并降低总体成本。由于其高级嵌入式自动化和通信系统，因此达到了更高的可靠性，可用性和安全性标准。此外，由于变电站的外壳是密闭且受压的，因此可以使用更便宜的IP00设备代替更高IP等级的设备。减少了建筑工程的成本和时间，以及给人们带来的不便，特别是在交通繁忙的地区。另外，减少了总的人工劳动，这降低了成本。在这种情况下，将介绍拟议的变电站概念的功能和设计指南，以及为解决热，结构和电气设计问题而开发的方法。