Interconnection Services


Energy Resource Integration and Interconnection

Over the last 20 years, the electrical power industry has seen a significant increase in remote generation installations consisting primarily of wind, solar, geothermal, and biomass renewable sources. The geographic location of these new-generation technologies, at or near the point of interconnection, provides the opportunity for increased grid efficiencies, availability, and reliability. However, to fully realize the benefits, remote resources must be designed and integrated into the overall bulk power grid to minimize generator contribution to undesirable effects on existing grid assets and operation. This requires generators to design, test, and commission systems following uniform regulatory criteria. At Electric Power Engineers, LLC (EPE), our extensive experience spans North America, and we’ve supported projects across multiple regions, including ERCOT, WECC, CAISO, SPP, MISO, PJM, NYISO, ISO NE, SERC, IESO, and AESO.


  • PSCAD Model Development, Tuning, and Benchmarking
  • PSSE Model Development, Tuning, and Benchmarking
  • TSAT Model Development, Tuning, and Benchmarking
  • SSR Support Dynamic Model Tuning and Testing
  • PPC Model Development and Tuning
  • PSLF and ASPEN Model Development
  • Complete Interconnection Applications for Utility Scale, Large Loads, and DG Projects Across North America
  • Preliminary Technical and Financial Feasibility Study
  • Full Registration and Planning Model RARF
  • ERCOT Registration Support
  • QSA Requirement Support
  • Interconnection Application Scoping Meeting
  • General Interconnection Support

Other Services

  • Grid Code and Smart Grid Development
  • Demand (Load) Forecasting
  • Insulation Coordination
  • ISO Integration Analysis and Support
  • Distribution and Transmission
    System Mapping
  • Expert Witness Support
  • Utility Coordination
  • Training, Seminars, and Support
  • ISO Support and Representation

Design/System Studies

  • Reactive Power Compensation Study
  • Site Conceptual Layout
  • Collection System Design
  • Substation Protection Single Line Diagram
  • Substation Location Optimization Study
  • Insulation Coordination, Lightning, TOV, and TRV
  • Flicker Study and Harmonics Analysis
  • Effectively Grounded Analysis
  • Capacitor Bank Size Optimization
  • Capacitor Bank Step Sizing
  • Capacitor Switching Study
  • Cable Thermal Ampacity Analysis
  • Arc Flash Hazard Analysis
  • Load Flow and Loss Analysis
  • Short Circuit Study
  • Protection Relay Coordination Study
  • Inductive Coordination Study
  • Pre- and Post-Energization Harmonic Studies
  • Relay Coordination Study, Setting, and Philosophies
  • Lightning Protection Study
  • P50 PVSyst Production Estimate Report
  • Ground Study
  • Post-energization Harmonic Study
  • AC & DC Cable Ampacity Study

Case Study

Horse Creek Wind IT & C

  • Updated and assisted in the submission of the Resource Asset Registration Forms (RARF) of the Horse Creek Wind through the ERCOT Market Information System (MIS) site
  • Completed the commissioning plan narrative for the project in accordance with ERCOT’s latest Interconnection Handbook
  • Completed and provided technical support during the Lagging/Leading reactive power tests, Primary Frequency Response (PFR), and Automatic Voltage Regulator (AVR) tests
  • Performed a generator/grid frequency scan to determine any potential resonant points that may coincide with the grid side frequency scan
  • As a second step, EPE completed a detailed SSO study using a PSCAD™ model made up of the equivalent project model and the equivalent AEP system model representing the area of concern for SSO

How can we help you?

Discuss your project with our power and energy experts.