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Smart City Distribution Project in Stockholm, Sweden

project Background

Stockholm, Sweden, is a benchmark for smart city and green low-carbon urban development in Northern Europe. It was awarded the world’s first "European Green Capital" title in 2010. As a key supporting initiative for the grid intelligence and urban low-carbon transition of Stockholm, this smart city power distribution project comprehensively improves the stability and environmental performance of urban public power supply and serves as an important pillar for long-term sustainable development.

Project Overview

  • Construction Year: 2015
  • Project Location: Stockholm, Sweden
  • Supplied Products: 12kV ASNA Atmospheric Pressure Sealed Natural Air Insulated RMU / Switchgear
  • Delivery Quantity: 11 units
  • Manufacturing Lead Time: 25 days
  • Application Scenario: Indoor distribution room
  • Average Annual Humidity: 79% 
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Solution Description

Tailored to project characteristics, engineers adopted ASNA switchgear with rated voltage of 12kV, rated current of 630A and short-circuit breaking current of 20kA. All switchgears are equipped with circuit breakers and 3-position disconnector-earthing switches.

Electrical configuration: ABB REF615 is deployed for relay protection. Classic 3-in-1 three-phase current transformers provide accurate current signals for measurement and line protection.
Structural design: A 3-unit common enclosure design is adopted to reduce footprint and reserve sufficient space for future capacity expansion. 
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Project Outcomes

Since commissioning, the full set of distribution equipment has operated safely and reliably, isolating faults accurately. It fully meets the high-standard power distribution requirements of Stockholm’s smart city and has withstood multiple extreme weather events, achieving all project targets: 
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  • Strong environmental adaptability and stable operation:

Maintains excellent insulation, sealing and mechanical performance under local severe cold conditions, with no frost damage, ageing or unexpected outages, delivering safe and continuous power supply for the urban distribution network.

   

  • Green and smart distribution network established:

SF₆-free green distribution equipment complies with Northern Europe’s low-carbon policies and high power reliability requirements, highly aligning with Stockholm’s core development vision as the "European Green Capital" and smart city.


  

  • Standardized end-to-end delivery with flawless project execution:

Efficient response and controllable milestones throughout technical consultation, custom solution design, manufacturing, factory pre-commissioning and safe handover. 100% intact equipment upon site arrival. The Sweden team delivered systematic technical support and O&M training, winning high recognition and long-term trust from the client.

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