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

At Keentel Engineering, we specialize in advanced grounding system design, electromagnetic interference (EMI) mitigation, and transient response analysis powered by SES CDEGS software—the world’s leading simulation suite for high-voltage (HV) and extra-high-voltage (EHV) systems.

Modern engineers rely on CDEGS software to design safe grounding systems, analyze EMI risks, and ensure compliance in high-voltage environments.

Since 1974, SES CDEGS has set the benchmark for CDEGS grounding software, enabling accurate modeling of complex electrical and electromagnetic phenomena.
Keentel’s engineers apply this sophisticated toolset to deliver safe, cost-effective, and NERC-compliant designs across utility substations, renewable energy facilities, and industrial infrastructures.

🔹Full Suite Simulation: From soil resistivity testing to lightning shielding and EMI analysis.

🔹Regulatory Compliance: Designs meet IEEE Std 80, NESC, and NERC PRC standards.

🔹Design Optimization: Reduce materials and construction costs while maximizing personnel safety.

🔹Transient and Frequency Domain Studies: Evaluate system resilience under faults, switching surges, and lightning events.

Our team acts as a trusted CDEGS consultant, delivering accurate simulations and optimized grounding solutions for complex projects.

Services	Key modules / outputs
Grounding / Earthing Design	AutoGround, MultiGround+ → step/touch maps, mesh & rod sizing
EMF / EMI & AC-Interference	MultiFields, SPLITS → pipeline & telecom induced-voltage studies
Lightning & Surge Protection	HIFREQ, SESShield → mast layout, surge-arrestor kA ratings
Cable & Line Parameter Modelling	MultiLines, TRALIN → sequence impedances for PSCAD/ETAP models
Environmental Noise & Corona	SESEnviro → EMF & audible-noise compliance reports

Location: Midwest Utility (Confidential)
Scope: Expansion of an existing 345kV substation, including new transformer bays and reactors.
Challenge: Designing a grounding system in multilayer soil while meeting IEEE Std 80 safety limits for updated fault current levels.
Solution: Keentel Engineering utilized RESAP and MultiGround+ modules from the CDEGS suite to accurately model soil profiles, fault current distribution, and step/touch voltages. Hotspot areas were identified and mitigated through optimized conductor placement.
Outcome: Delivered a grounding system that fully complied with IEEE/NESC standards while achieving 20% material cost savings through strategic conductor optimization.

Location: Arizona, USA
Scope: Lightning protection design for a 50 MW utility-scale solar farm prone to frequent lightning strikes.
Challenge: High soil resistivity combined with repeated outages and equipment failures during thunderstorms.
Solution: Leveraging MultiFields and SESShield, Keentel conducted a comprehensive transient analysis, optimizing the layout and height of lightning masts and reinforcing bonding grids.
Outcome: Since the upgrade, the solar facility has reported zero lightning-related outages across two full storm seasons, improving reliability and protecting assets.

Location: Offshore Project (Confidential Client)
Scope: High-voltage subsea cable modeling to support offshore wind farm fault studies and load flow simulations.
Challenge: Precisely modeling complex multi-core subsea cable arrays laid across layered seabed profiles to meet coordination requirements for fault studies.
Solution: Keentel employed MultiLines+ and SPLITS to simulate mutual inductance, capacitance, and electromagnetic interactions among cables, feeding critical parameters into PSCAD dynamic models.
Outcome: Delivered high-accuracy cable models for vendor coordination, ensuring compliance with project fault analysis requirements and optimizing system protection.

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.