By Richard P Marek

For many years, utilities have used mobile transformers or complete mobile substations to mitigate outage risks in their smaller capacity substations. These fast deployable units have offered the advantages of quick availability of replacement equipment. They are mobile, compact, lightweight, and versatile, generally covering multiple voltage ratings. Designed to match the regional road weight limits, they can be installed and operating in a very short time. Now, this same concept is being applied to large power applications.

This article reviews the latest developments and trends towards highly moveable large power transformers designed to improve grid resiliency.Among various design methods for reducing the size and weight of power transformers, high temperature insulation systems offer a key tool.

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This article was originally published in the June 2019 issue of the New Technology Changing the Heart of Power Systems magazine.

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