{
  "language": "en",
  "interfaceLanguage": "ar",
  "url": "https://voltformer.com/ar/news/hvdc-architecture-ai-data-centers-150kw-rack-density-september-2026",
  "slug": "hvdc-architecture-ai-data-centers-150kw-rack-density-september-2026",
  "category": "transmission-substations",
  "publishDate": "2026-09-19",
  "sourceName": "IEEE Power & Energy Society / Digital Energy Expo 2026",
  "sourceUrl": "https://ieeexplore.ieee.org/document/power-energy-hvdc-data-center-architectures-september-2026",
  "readingTimeMinutes": 5,
  "tags": [
    "HVDC",
    "Data Center",
    "AI Clusters",
    "Solid State Transformer",
    "Efficiency",
    "Substation"
  ],
  "content": {
    "title": "Hyperscalers Shift to Direct HVDC Architectures for 150 kW AI Clusters, Cutting Substation Conversion Losses by 15%",
    "summary": "As next-generation AI server clusters push rack power densities from 40 kW to upwards of 150 kW, hyperscale data center operators and electrical EPCs are transitioning from conventional three-phase AC distribution to Medium-Voltage and High-Voltage Direct Current (MVDC/HVDC) architectures, eliminating redundant AC-DC transformation stages.",
    "sections": [
      {
        "heading": "Overcoming AC Transformation Bottlenecks",
        "paragraphs": [
          "Conventional data center architectures rely on multiple transformation steps: 115–230 kV utility grid stepped down to 13.8–34.5 kV, then to 415/480 V AC, before centralized UPS systems and server power supply units (PSUs) convert it to DC. Each stage incurs 2–3% thermal and magnetic losses, translating to millions of kilowatt-hours wasted annually at 500+ MW AI campuses.",
          "The new HVDC topology feeds medium-voltage DC directly into rack-level power distribution units (rPDUs) using Solid-State Transformers (SSTs) and silicon-carbide (SiC) power converters, bypassing intermediate low-voltage AC switchgear entirely."
        ]
      },
      {
        "heading": "Grid-Interactive Dispatch and Peak Shaving",
        "paragraphs": [
          "By integrating high-voltage battery storage systems (BESS) directly onto the common DC busbar, hyperscale facilities can dynamically inject reactive power or shave multi-megawatt spikes during LLM training runs without causing frequency swings on the regional AC grid.",
          "Major power equipment manufacturers report a surge in inquiries for bidirectional MVDC converters and compact SF6-free DC switchgear engineered for data center substations."
        ]
      }
    ]
  },
  "companies": []
}