A Coordinated Electric System Interconnection Review—the utility’s deep-dive on technical and cost impacts of your project.

Connecting large-scale generation and storage projects to regional transmission grids demands deep expertise, seamless ISO coordination, and bullet-proof engineering deliverables. Keentel Engineering has supported clients across PJM, ERCOT, WECC and NYISO with end-to-end Point-of-Interconnection (POI) services—from feasibility studies and dynamic modeling to protection scheme design and final energization. Our proven approach minimizes RFIs, accelerates commercial operation dates, and ensures first-time ISO acceptance, making us the go-to partner for renewable, storage, and hybrid projects seeking reliable, compliant transmission access.

Client: Confidential Renewable Developer

Scope: Full POI engineering for a 250 MW solar PV + BESS interconnection to a 230 kV PJM transmission line.

Services Provided:

PJM Feasibility, System Impact (SIS) & Facilities studies review
PSSE v35 dynamic and short-circuit model development per PJM modeling guide
Reactive capability verification at the POI
One-line diagrams, relay protection schemes & switching plans
Relay setting design for PRC-019, PRC-024 & PRC-025 compliance

Key Challenges:

Tight voltage regulation and transient stability criteria from PJM TOs
Aggressive coordination schedule with PJM and neighboring utilities

Results:

PJM accepted all dynamic & short-circuit models on first submission
Facilities Study finalized ahead of plan—mitigating COD risk
POI energized & commissioned successfully on first attempt
Keentel named preferred POI partner for future PJM projects

Client: Confidential Wind Developer

Scope: POI interconnection of a 300 MW wind farm expansion into the ERCOT 345 kV network under the ERCOT Resource Interconnection Handbook (RIN).

Services Provided:

PSSE model creation & TSAT dynamic-model validation to ERCOT DWG requirements
Steady-state, dynamic stability & short-circuit data packages
RFI responses and coordination with ERCOT Planning & TSP
Protection package design per ERCOT Nodal Operating Guide Sec. 2
ICCP point-mapping for telemetry compliance

Key Challenges:

ERCOT’s fast-frequency-response (FFR) validation under evolving grid conditions
Integrating legacy and new turbine models in a unified hybrid-code base

Results:

Zero RFI follow-ups after initial package review—a rare achievement
Dynamic-model certification granted ahead of schedule
Client entered ERCOT market on time, with no penalties or delays

Client: Confidential Renewable Developer

Scope: POI interconnection engineering for a 225 MW hybrid solar + BESS project into WECC’s 230 kV transmission.

Services Provided:

Dynamic models (PSSE & PSCAD) per WECC Modeling & Validation Subcommittee (MVWG) standards
Harmonic analysis & Sub-Synchronous Resonance (SSR) risk assessment
Electromagnetic transient (EMT) studies on inverter switching impacts
SCADA/RTU signal list development & point-to-point testing support

Key Challenges:

WECC’s rigorous review of IBR models and fast-transient behavior
SSR studies necessity due to series-compensated transmission lines

Results:

EMT modeling report approved without major comments
Achieved full PRC-024, PRC-019 & PRC-027 compliance
Preemptive modeling saved client millions in potential cost overruns

Client: Confidential Wind Developer

Scope: End-to-end POI interconnection for a 120 MW wind farm tying into 138 kV NYISO system under the NYISO Generator Interconnection Process (GIP).

Services Provided:

PSSE steady-state & dynamic models per NYISO submission requirements
Technical appendices for FERC LGIA (Appendix C – Facilities Study)
Protection coordination plan aligned with NYISO & TO philosophies
Short-circuit contribution review & relay coordination studies

Key Challenges:

NYISO’s stringent voltage & frequency ride-through criteria
Complex stakeholder coordination among the developer, NYISO, and TO

Results:

First-round acceptance of full model submittal—no resubmissions required
Finalized Interconnection Agreement terms without material changes
Substation build-out and energization completed on original timeline
Client engaged Keentel for ongoing O&M engineering support

In 1995, Sonny Patel earned his Electrical Engineering degree from the University of Illinois. But degrees don't build legacies — action does.

For three decades, he has worked the power industry from every side of the table: 16 years as a utility engineer at Exelon/Commonwealth Edison; generation leadership across hydroelectric, industrial steam turbine, and a 9 GW renewable fleet; NERC Regional Entity Senior Compliance Engineer and Audit Team Lead, auditing some of the nation's largest utilities; and testing and commissioning lead on equipment up to 765 kV — the very top of the North American grid.Utility. Generator. Regulator. Consultant. Few engineers have seen all four seats. Fewer still have sat in them.

His experience spans nuclear, hydro, conventional generation, renewables, oil and gas, mining — and today's data centers, where he is authoring a three-book series on data center design. He is a Licensed Professional Engineer in six states and a Licensed Electrical Contractor in Florida (Unlimited EC) — he doesn't just design the work; he's qualified to stand behind its execution.Today, as Founder and CEO of Keentel Engineering, Sonny leads a nationwide team of engineers delivering substation design, power system studies, NERC compliance, and commissioning — done right, coast to coast.Three decades. Every side of the table. One standard: accountable engineering.

In 1995, Sonny Patel earned his Electrical Engineering degree from the University of Illinois. But degrees don't build legacies — action does.

Utility. Generator. Regulator. Consultant. Few engineers have seen all four seats. Fewer still have sat in them.

Today, as Founder and CEO of Keentel Engineering, Sonny leads a nationwide team of engineers delivering substation design, power system studies, NERC compliance, and commissioning — done right, coast to coast.Three decades. Every side of the table. One standard: accountable engineering.