How we successfully scaled an existing enclosure design to house massive 3150 kVA transformers, overcoming first-time manufacturing and mechanical challenges to deliver a total grid output of 17.4 MW.
How we successfully scaled an existing enclosure design to house massive 3150 kVA transformers, overcoming first-time manufacturing and mechanical challenges to deliver a total grid output of 17.4 MW.
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Scope of work:
Engineering, structural modification, and internal manufacturing of high-capacity sheet metal compact secondary substations (CSS).
Technical Specification:
Fitting Massive Transformers into Standard Enclosures
To launch the ambitious 17.4 MW Kuusalu Solar Park, the project required an internal medium-voltage grid capable of handling immense, high-density solar energy distribution.
Standard, off-the-shelf compact substations simply did not possess the physical space or thermal properties to accommodate the massive 2500 to 3150 kVA transformers and heavy-duty low-voltage systems required. Without a fast, specialised enclosure upgrade, the solar park would face inadequate power capacity, compromised safety margins, or severe connection delays to the main grid.
Engineered Enclosure Upgrade and First In-House Assembly
Harju Elekter engineered a significantly larger sheet metal enclosure by building upon the foundations of the proven HEKA1VM1600-1 design.
To successfully assemble this new high-power substation type in-house for the very first time, our teams tackled critical mechanical changes in the sheet metal component design and overhauled our internal assembly processes.
We integrated the high-capacity transformers with a robust HECON 2500 A 800 V low-voltage system on the secondary side and Schneider RM6 switchgear on the primary side.
17.4 MW Solar Park Online and Expanded Manufacturing Capability
The successful deployment of six HEKA1VM3150-1 compact substations enabled the Kuusalu Solar Park to launch smoothly with a total output of 17.4 MW.
