Statnett and Svenska kraftnät Energize 1,000 MVA 420 kV Phase-Shifting Transformer at Hasle Substation
To resolve structural power loop flows between southern Norway and western Sweden, transmission system operators Statnett and Svenska kraftnät have energized a 1,000 MVA 420 kV Phase-Shifting Transformer (PST) at Hasle Substation near the national border.
- تاريخ النشر: 2026-09-21
- الفئة: المحولات والشبكة
- المصدر الأصلي: Statnett & Svenska kraftnät Nordic Operations
- مدة القراءة: 4 min
Eliminating Loop Flows Across the Nordic Synchronous Area
Massive wind generation buildouts in northern Sweden often route unscheduled transit electricity southward through Norway’s hydro-rich grid, creating bottlenecks that restrict cross-border trading capacity. The new Hasle PST actively controls power flow across the 420 kV cross-border tie-line.
With a rated throughput of 1,000 MVA, the unit utilizes dual-tank design separating the shunt and series active parts, allowing precise phase angle adjustment up to ±25 degrees without exceeding transformer core flux density limits.
Unlocking 500 MW of Additional Cross-Border Commercial Capacity
By steering power directly along contracted contractual paths, Nordic TSOs can safely expand cross-border capacity between price bidding zones NO1 (Oslo) and SE3 (Stockholm) by 500 MW.
The transformer is equipped with online dissolved gas chromatography, optical fiber hot-spot temperature probes, and biodegradable synthetic ester insulating liquid to satisfy stringent environmental protection standards in the surrounding forest catchment basin.