Insights
Technical guides on high voltage substations, transmission lines and EPC contracting, written by Powerst's engineering team for owners, developers and utilities planning their next project.
AIS vs GIS substations: which one fits your project?
A practical comparison of air-insulated and gas-insulated switchgear — footprint, cost, maintenance and where each makes sense.
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What does "EPC" actually mean in power infrastructure?
Engineering, Procurement and Construction, explained — and how it compares to PC and turnkey delivery models.
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400kV transmission line design: key considerations
Routing, conductor selection, tower spotting and clearance — the engineering decisions that shape a 400kV line.
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How long does it take to build a high voltage substation?
A realistic phase-by-phase timeline, from feasibility and permitting through energization.
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What is OPGW — and why is it on every new line?
One cable takes the lightning and carries the data. How optical ground wire works and what its fibers do.
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Transformer lead times: planning around the bottleneck
9–14 months of manufacturing sets every substation schedule. The procurement strategies that keep it off your critical path.
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The tests that stand between "built" and "energized"
Insulation, injection, SCADA point-to-point and staged energization — the full commissioning sequence.
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Connecting a BESS to the grid: what it actually takes
The battery is the easy part — PCS, transformers, protection and grid code are where the engineering lives.
Read article →HV Engineering Glossary — 55 terms, A to Z
AIS, catenary, OPGW, SCADA, dead-tank breaker… every term a substation or line project runs on, defined and searchable.