Interconnection study and advisory firms
Thirteen firms in this table prepare, review or run interconnection studies. RLC Engineering has performed over 500 system impact studies, WSP (with TRC) more than 600 planning studies, and Burns & McDonnell has supported PG&E’s transmission planning group since 2011 across 230+ projects and 35 GW of requested capacity. GridCARE says it has qualified 5 GW across the US.
| Burns & McDonnell | Power flow, transient stability and bus flow analysis for cluster studies | — | — | — | — | — | 2026-11-11 |
|---|---|---|---|---|---|---|---|
| Danovo Energy Solutions | — | — | — | — | — | — | 2026-11-11 |
| DNV | Thermal/voltage, dynamic stability, short circuit/protection and electromagnetic transient impacts | — | — | — | — | — | 2026-11-11 |
| Electric Power Engineers (EPE) | Transmission planning and operations services | — | — | — | — | ERCOT and Eastern Interconnect, including SPP, MISO, PJM, ISO-NE, NYISO and SERC (2025 service-team description) | 2026-11-11 |
| Enerzinx | — | Renewables, data centers and utility-scale energy | Generator interconnection applications | Upgrade identification and cost estimation | — | — | 2026-11-11 |
| GridCARE | — | — | — | — | — | — | 2026-11-11 |
| ICF | — | Generation and load connections | Site screening through application review and shadow studies | Network upgrade cost minimization | — | — | 2026-11-11 |
| Paces | — | — | Interconnection submission preparation | — | — | — | 2026-11-11 |
| PSC Consulting | Feasibility and interconnection studies | — | Generator testing, modeling and compliance | — | — | — | 2026-11-11 |
| Pterra Consulting | Generation interconnection, feasibility and impact studies | DER evaluation and load interconnection engineering | — | — | — | — | 2026-11-11 |
| RLC Engineering | DER cluster studies | Solar, wind and battery resources on transmission and distribution systems | — | — | 5001 | — | 2026-11-11 |
| TNEI | — | — | IR process management with RTOs, ISOs and investor-owned utilities | Review of utility impact studies for costs and risks | — | US data-center interconnection services | 2026-11-11 |
| WSP | TRV and TOV dynamic stability studies | — | Interconnection application assistance | — | 6001 | United States study reference portfolio | 2026-11-11 |
Picking a study firm
How rows are readApplication support
Paces prepares interconnection submissions inside its development platform, Enerzinx handles generator applications and ICF covers site screening through application review and shadow studies.
Engineering and modelling
Pterra covers IEEE 2800 and NERC MOD and PRC compliance, PSC Consulting runs feasibility and interconnection studies in PSS/E, PowerWorld, PSLF, DIgSILENT and PSCAD, and DNV covers thermal, voltage, dynamic stability, short circuit and electromagnetic transient impacts for network operators.
Cost and data-center focus
TNEI reviews utility impact studies for costs and risks and serves data centers from 10 MW to 500 MW and above. EPE provides interconnection engineering and strategy for generation, large-load and transmission developers, and Danovo implements queue management and study clustering for utilities, ISOs and RTOs.