{
  "$schema": "https://ps-wiki.github.io/schema/v1/term.schema.json",
  "id": "zone",
  "title": "Zone",
  "description": "Geographical concept.",
  "language": "en",
  "tags": [
    "geography",
    "system-operator",
    "pjm"
  ],
  "related": [
    "region",
    "subregions",
    "control-area",
    "balancing-authority-area",
    "reliability-coordinator-area"
  ],
  "breaking": false,
  "dates": {
    "created": "2025-03-15",
    "last_modified": "2025-11-02"
  },
  "authors": [
    {
      "name": "Jinning Wang",
      "url": "https://jinningwang.github.io"
    }
  ],
  "content": {
    "sections": [
      {
        "order": 1,
        "id": "definition-by-pjm",
        "title": "Definition by PJM",
        "type": "note",
        "source_keys": [
          "pjm2023transmission"
        ],
        "page": null,
        "body_md": "",
        "figures": [
          {
            "path": "/assets/img/pswiki/PJM_zone_map.png",
            "caption_md": "PJM Transmission Zones Map (from <d-cite key=\"pjm2023transmission\"></d-cite>)",
            "alt": "PJM Transmission Zones Map",
            "zoomable": true,
            "source_keys": [
              "pjm2023transmission"
            ]
          }
        ]
      },
      {
        "order": 2,
        "id": "definition-by-matpower",
        "title": "Definition by MATPOWER",
        "type": "note",
        "source_keys": [
          "matpowerv71"
        ],
        "page": "p139",
        "body_md": "In MATPOWER, there is a bus parameter named \"ZONE\", and it means loss zone.\n"
      }
    ]
  }
}