{
  "slug": "electric-utilities",
  "name": "Electric utilities",
  "sector": "energy-utilities",
  "summary": "Electric utilities and power-market participants coordinate generation, networks, and customer supply. Reliability requires continuous balancing, while investment recovery depends on the local market and regulatory model.",
  "scope": "Covers generation, transmission, distribution, and retail supply as distinct functions. Some utilities integrate several functions; other markets separate them. Regulatory and market examples refer to the United States and should not be assumed to apply worldwide.",
  "aliases": [
    "Electricity",
    "Power utilities",
    "Power generation",
    "Electric power"
  ],
  "segments": [
    {
      "name": "Generation",
      "description": "Converts primary energy into electricity. Dispatchable plants, variable renewables, and storage have different operating constraints and revenue opportunities."
    },
    {
      "name": "Networks",
      "description": "Transmission moves power over the high-voltage system; distribution connects local customers. Network capacity and reliability are separate from the amount of energy produced."
    },
    {
      "name": "Retail and integrated utilities",
      "description": "Sell electricity and customer services, sometimes while owning generation and networks. Municipal, cooperative, investor-owned, and competitive suppliers have different governance and incentives."
    }
  ],
  "flow": [
    {
      "name": "Plan and procure",
      "description": "Forecast demand, procure energy and other services, maintain equipment, and plan infrastructure to meet expected and stressed conditions."
    },
    {
      "name": "Generate and balance",
      "description": "Coordinate generation, storage, imports, exports, and responsive demand to keep supply and demand balanced."
    },
    {
      "name": "Transmit and distribute",
      "description": "Move power through lines and substations, transform voltage, and manage equipment and network limits."
    },
    {
      "name": "Meter, bill, and restore",
      "description": "Measure customer consumption, apply tariffs, collect payment, and respond to outages and service requests."
    }
  ],
  "economics": {
    "revenueUnit": "Kilowatt-hours or megawatt-hours of energy, plus applicable demand, capacity, network, and service charges; exact products vary by market.",
    "payers": "Retail customers, electricity retailers, utilities, and wholesale counterparties. The party operating the wires may differ from the party selling the electricity.",
    "costs": [
      {
        "name": "Energy and operation",
        "explanation": "Fuel or purchased power, generation maintenance, grid operation, customer service, and system losses affect ongoing expenditure."
      },
      {
        "name": "Infrastructure",
        "explanation": "Power plants, transmission, substations, distribution equipment, and resilience investment require long-term financing and maintenance."
      }
    ],
    "capital": "Infrastructure is long-lived and must be sized for relevant demand and reliability conditions, not just average annual energy sales. Siting and connection constraints influence investment timing.",
    "workingCapital": "Fuel purchases, wholesale settlements, and collateral can precede customer collection. Weather-driven demand and price volatility can change liquidity needs quickly.",
    "mechanism": "A regulated network commonly recovers approved costs through a regulatory framework; a merchant generator faces a different revenue problem. Energy sales, peak capacity, and reliability are not the same product. High annual generation does not guarantee availability at the hour and place of greatest need."
  },
  "operations": {
    "activities": [
      "System planning and dispatch coordination",
      "Asset inspection and preventive maintenance",
      "Metering, billing, and outage restoration"
    ],
    "assets": [
      "Generating facilities, lines, transformers, and substations",
      "Control centers, meters, and communications"
    ],
    "roles": [
      "System operators and planning engineers",
      "Line crews, technicians, and customer-service teams"
    ],
    "records": [
      "Dispatch and outage logs",
      "Asset condition, meter readings, and settlement records"
    ],
    "software": [
      "Energy management and distribution management",
      "Outage, asset, and customer information systems"
    ],
    "metrics": [
      {
        "name": "Energy delivered",
        "definition": "Megawatt-hours supplied over a specified period and boundary.",
        "why": "Measures energy service, not peak capability."
      },
      {
        "name": "Peak demand",
        "definition": "Highest relevant power requirement, measured in megawatts over a stated interval.",
        "why": "Influences network and capacity requirements."
      },
      {
        "name": "Outage duration and frequency",
        "definition": "Customer interruption duration and count under explicitly defined reporting rules.",
        "why": "Tests reliability; comparisons need consistent treatment of major events."
      }
    ]
  },
  "structure": [
    "Electricity markets reflect both physical constraints and policy choices. In U.S. organized markets, regional operators coordinate parts of the system and administer wholesale markets. Elsewhere, vertically integrated arrangements or different national structures prevail.",
    "Network congestion means electricity at one location and time can have a different value from electricity elsewhere. Adding generation without deliverable transmission may not resolve a local constraint. Flexibility, demand response, storage, and network upgrades can address different parts of the problem."
  ],
  "risks": [
    {
      "risk": "Extreme demand and supply stress",
      "mechanism": "Heat, cold, fuel disruption, or equipment outages can coincide and reduce available reserves."
    },
    {
      "risk": "Network failure",
      "mechanism": "Storms, vegetation, aging equipment, or operational failures can interrupt delivery even when generation is sufficient."
    },
    {
      "risk": "Cost-recovery and price mismatch",
      "mechanism": "Unexpected purchased-power or investment costs may not align with customer tariffs or regulatory recovery timing."
    }
  ],
  "dependencies": {
    "upstream": [
      {
        "slug": "oil-gas",
        "label": "Oil and gas",
        "relationship": "Supply natural gas and other fuels used by relevant generators."
      },
      {
        "slug": "construction",
        "label": "Construction",
        "relationship": "Builds and upgrades generating and network infrastructure."
      }
    ],
    "downstream": [
      {
        "slug": "semiconductor-manufacturing",
        "label": "Semiconductor manufacturing",
        "relationship": "Depends on dependable power for tightly controlled fabrication."
      },
      {
        "slug": "steel",
        "label": "Steel",
        "relationship": "Uses electricity for melting, rolling, and other operations."
      },
      {
        "slug": "water-utilities",
        "label": "Water utilities",
        "relationship": "Use power for pumping and treatment."
      }
    ],
    "substitutes": [
      {
        "label": "Behind-the-meter supply and efficiency",
        "relationship": "Can reduce grid purchases or some peaks, but interconnection, backup, timing, and system-service needs remain relevant."
      }
    ]
  },
  "workedExample": {
    "title": "Energy volume does not describe peak capacity",
    "assumptions": [
      "Illustrative factory uses 2 MW steadily for 10 hours.",
      "Another factory uses 10 MW for 2 hours, with no other consumption in this simplified period."
    ],
    "calculation": [
      "First factory: 2 MW × 10 hours = 20 MWh.",
      "Second factory: 10 MW × 2 hours = 20 MWh."
    ],
    "takeaway": "Energy consumption is equal, but the second factory requires five times the instantaneous power. The network and tariff implications depend on coincident system demand and local rules."
  },
  "scenario": {
    "change": "A large new customer requests a grid connection.",
    "effects": [
      "The utility assesses local capacity, power quality, and effects on the wider system.",
      "Upgrades or new supply arrangements may be needed even if annual regional generation appears sufficient.",
      "Connection timing depends on engineering, equipment, permitting, and commercial arrangements."
    ],
    "watch": [
      "Local peak and network loading",
      "Connection queue and upgrade schedule",
      "Demand forecast uncertainty"
    ]
  },
  "misconceptions": [
    {
      "claim": "A megawatt and a megawatt-hour are interchangeable.",
      "correction": "A megawatt measures power; a megawatt-hour measures energy over time. Both are needed to understand electricity service."
    }
  ],
  "sources": [
    {
      "id": "eia-delivery",
      "title": "Electricity explained: How electricity is delivered to consumers",
      "organization": "U.S. Energy Information Administration",
      "url": "https://www.eia.gov/energyexplained/electricity/delivery-to-consumers.php",
      "supports": "Generation, transmission, distribution, utility types, balancing, and U.S. reliability arrangements."
    },
    {
      "id": "ferc-markets",
      "title": "Energy Markets",
      "organization": "Federal Energy Regulatory Commission",
      "url": "https://www.ferc.gov/understanding-energy-markets",
      "supports": "U.S. wholesale electricity market participants and the role of RTOs and ISOs."
    },
    {
      "id": "ferc-primer",
      "title": "Energy Primer: A Handbook of Energy Market Basics",
      "organization": "Federal Energy Regulatory Commission",
      "url": "https://www.ferc.gov/media/energy-primer-handbook-energy-market-basics",
      "supports": "Power-market products, physical constraints, prices, and commercial mechanisms."
    }
  ],
  "evidence": {
    "scope": [
      "eia-delivery",
      "ferc-markets"
    ],
    "flow": [
      "eia-delivery"
    ],
    "economics": [
      "ferc-primer"
    ],
    "operations": [
      "eia-delivery",
      "ferc-primer"
    ],
    "structure": [
      "ferc-markets",
      "ferc-primer"
    ],
    "risks": [
      "eia-delivery",
      "ferc-primer"
    ]
  },
  "relatedConcepts": [
    "capital-intensity",
    "regulation-and-market-entry",
    "capacity-utilization",
    "unit-economics"
  ],
  "classification": [],
  "editorialNote": "Process descriptions draw on the cited primary sources. Business-model interpretation is editorial synthesis; worked-example figures are illustrative assumptions, not industry benchmarks. Regulation and commercial arrangements vary by jurisdiction.",
  "companies": {
    "selectionNote": "Illustrative electricity businesses spanning generation, integrated utilities, renewable portfolios, and transmission and distribution networks. This is not a ranking by revenue or generating capacity; network operators and generators perform different roles.",
    "verifiedOn": "2026-10-26",
    "entries": [
      {
        "name": "Duke Energy",
        "kind": "Company group",
        "segment": "Regulated electric utilities",
        "description": "Owns electric utilities serving customers in several US states and operates substantial generating assets. Its businesses connect long-term infrastructure investment with regional electricity demand and regulated service obligations.",
        "url": "https://investors.duke-energy.com/overview/"
      },
      {
        "name": "EDF",
        "kind": "Company group",
        "segment": "Nuclear and hydroelectric generation",
        "description": "Produces electricity through nuclear, hydroelectric, and other generating assets, alongside network and customer businesses. Its generation mix connects plant availability, maintenance planning, and reliable electricity supply.",
        "url": "https://www.edf.fr/en/the-edf-group/dedicated-sections/investors/financial-and-extra-financial-performance/edf-presentation-facts-figures"
      },
      {
        "name": "Enel",
        "kind": "Company group",
        "segment": "Generation and electricity distribution",
        "description": "Operates power generation, electricity distribution, and energy-storage businesses. Its activities connect investment in generating assets with the networks and flexibility needed to deliver electricity to customers.",
        "url": "https://www.enel.com/company/our-business"
      },
      {
        "name": "ENGIE",
        "kind": "Company group",
        "segment": "Generation and flexible power",
        "description": "Operates renewable generation and flexibility assets including batteries, pumped storage, and gas-fired plants. Its portfolio combines electricity production with resources that help respond to changing demand and supply.",
        "url": "https://www.engie.com/en/our-activities/renewables-and-flex-power/"
      },
      {
        "name": "Iberdrola",
        "kind": "Company group",
        "segment": "Electricity networks and renewables",
        "description": "Operates electricity networks, renewable generation, and energy-supply businesses across several markets. Its model connects investment in grid infrastructure with generating assets, storage, and customer electricity needs.",
        "url": "https://www.iberdrola.com/about-us/our-company"
      },
      {
        "name": "Korea Electric Power Corporation",
        "kind": "Company",
        "segment": "Electricity transmission and distribution",
        "description": "Operates transmission and distribution infrastructure in South Korea, including high-voltage systems and local networks. Its activities show the engineering and operational work required to move electricity reliably.",
        "url": "https://www.kepco.co.kr/eng/business/domestic/transmission-and-distribution-business.do"
      },
      {
        "name": "National Grid",
        "kind": "Company group",
        "segment": "Electricity networks",
        "description": "Owns and operates electricity network infrastructure in the UK and US. Its transmission and distribution businesses connect generators with users through networks requiring continuing maintenance and investment.",
        "url": "https://www.nationalgrid.com/about-us/what-we-do"
      },
      {
        "name": "NextEra Energy",
        "kind": "Company group",
        "segment": "Utility and power generation",
        "description": "Owns Florida Power & Light and NextEra Energy Resources. Its businesses combine a regulated electric utility with generation and infrastructure development using several energy sources and storage.",
        "url": "https://www.investor.nexteraenergy.com/company-overview"
      },
      {
        "name": "NTPC",
        "kind": "Company group",
        "segment": "Thermal and renewable generation",
        "description": "Operates power-generation businesses in India with thermal, hydro, solar, and wind assets. Its portfolio connects conventional generating plants with investment in additional renewable and flexible resources.",
        "url": "https://ntpc.co.in/media/press-releases/ntpc-group-crosses-90-gw-installed-capacity-0"
      },
      {
        "name": "Southern Company",
        "kind": "Company group",
        "segment": "Integrated electric utilities",
        "description": "Operates electric utilities and wholesale generation businesses in the United States. Its activities connect generating plants, transmission infrastructure, and regional retail service within a group of operating companies.",
        "url": "https://www.southerncompany.com/about/our-business/our-companies.html"
      }
    ]
  },
  "published": "2026-10-26",
  "canonical": "https://industrywiki.org/industry/electric-utilities/"
}