{
  "language": "en",
  "interfaceLanguage": "ar",
  "url": "https://voltformer.com/ar/news/bpa-energizes-500kv-series-capacitors-slatt-substation-pacific-intertie",
  "slug": "bpa-energizes-500kv-series-capacitors-slatt-substation-pacific-intertie",
  "category": "transmission-substations",
  "publishDate": "2026-09-24",
  "sourceName": "Bonneville Power Administration (BPA) Transmission Services",
  "sourceUrl": "https://www.bpa.gov/about/newsroom/news-releases/bpa-slatt-substation-500kv-series-capacitors-energization-september-2026",
  "readingTimeMinutes": 5,
  "tags": [
    "BPA",
    "500 kV",
    "Series Capacitors",
    "Substations",
    "USA",
    "Pacific Intertie",
    "Grid Stability"
  ],
  "content": {
    "title": "BPA Energizes Upgraded 500 kV Series Capacitor Banks and 1,300 MVA Transformer at Slatt Substation",
    "summary": "The Bonneville Power Administration (BPA) has completed commissioning of modernized 500 kV series capacitor platforms and a 1,300 MVA 500/230 kV autotransformer bank at Slatt Substation in Oregon, reinforcing the Pacific AC Intertie by 600 MW.",
    "sections": [
      {
        "heading": "Mitigating Transient Reactance on Long 500 kV Corridors",
        "paragraphs": [
          "Slatt Substation is a vital switching hub along the Pacific AC Intertie, routing bulk federal hydropower from Columbia River dams toward California and intermountain load centers. The newly energized series capacitor banks provide 45% inductive compensation, slashing electrical impedance across the 500 kV transmission lines.",
          "The upgrade incorporates state-of-the-art metal-oxide varistors (MOV), triggered spark gaps, and optical bypass switches engineered to ride through extreme 63 kA short-circuit fault currents without platform flashover."
        ]
      },
      {
        "heading": "Boosting Regional Transmission Transfer Capability",
        "paragraphs": [
          "In tandem with the series capacitors, BPA commissioned a replacement 1,300 MVA 500/230 kV autotransformer bank featuring low-loss step-lap cores and fiber-optic winding hot-spot sensors.",
          "The completed project increases southern transmission capacity by 600 MW, preventing severe voltage sagging during high summer transfer periods across the Western Interconnection."
        ]
      }
    ]
  },
  "companies": []
}