# Transmission, interconnection & grid equipment

Part ID: 8.09 · Layer 8 (Power generation & energy supply)

High-voltage transmission equipment, interconnection hardware, grid-enhancing technology, and the EPC firms and developers that build and expand the grid feeding a data center site.

This category covers everything that moves bulk power from a generation source to a data center's point of interconnection: HVDC converter equipment and cable, STATCOMs and synchronous condensers that stabilize voltage, grid-enhancing technology that squeezes more capacity out of existing lines, advanced conductors, transmission structures, the EPC firms that build new lines, and the developers who originate transmission projects. It sits between the generation and utility layers above (Layers 8.01–8.08) and the facility-side electrical equipment in Layer 7, and grid operators are listed here for context on the markets this equipment serves, not as vendors. AI load growth has turned transmission capacity and interconnection queues into one of the most visible bottlenecks in bringing new data center capacity online, pulling forward demand for grid-enhancing technology and advanced conductors as faster-to-deploy alternatives to building entirely new transmission lines. An investor should watch order backlogs at the concentrated set of HVDC and large power-equipment makers, and separate the EPC and developer names (which benefit from transmission buildout regardless of who ultimately owns the line) from equipment makers exposed to specific technology cycles like grid-enhancing tech adoption.

**AI delta:** AI data centers have made transmission capacity and interconnection queues a visible bottleneck, pulling forward demand for grid-enhancing technology and advanced conductors as faster alternatives to new transmission lines.

## Companies

| Company | Role | Confidence | Ownership | Ticker | Note |
|---|---|---|---|---|---|
| AESO | service | inferred | state |  | grid operator (context, not a vendor) |
| CAISO | service | inferred | state |  | grid operator (context, not a vendor) |
| ERCOT | service | inferred | cooperative |  | grid operator (context, not a vendor) |
| IESO | service | inferred | state |  | grid operator (context, not a vendor) |
| ISO-NE | service | inferred | cooperative |  | grid operator (context, not a vendor) |
| MISO | service | inferred | cooperative |  | grid operator (context, not a vendor) |
| NYISO | service | inferred | cooperative |  | grid operator (context, not a vendor) |
| PJM | service | inferred | cooperative |  | grid operator (context, not a vendor) |
| SPP | service | inferred | cooperative |  | grid operator (context, not a vendor) |

Confidence tags: disclosed = company/filing statement; reported = trade press or partner list; inferred = taxonomy lead.