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PSCAD MODELING

For Transient Analysis & Weak Grid Scenarios

  • Best For: Utilities that require transient analysis of the project or system, usually in relation to specific inverter performance.
  • Why it matters: PSCAD is commonly requested by utilities in regions with high renewable penetration or known grid stability risks.
  • Deliverables: .pscx file + simulation documentation + Observations.
  • Ideal for: Transient stability, low voltage ride-through (LVRT), and inverter-based resource (IBR) compliance.

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PSS®E Load Flow & Dynamic Modeling

Industry Standard for Load Flow and Interconnection Packages

  • Best for: Utilities that require dynamic modeling of the project or system. Most ISO's in the eastern US and Hawaii require PSS®E for this analysis.
  • Why it matters: PSS®E is the standard modeling platform required in most load flow and stability analyses during the interconnection process.
  • Deliverables: .dyr dynamic file + supporting documentation
  • Ideal for: Steady-state studies, load flow analysis, and dynamic response verification.

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ASPEN OneLiner Modeling

Preferred Tool for Protection Coordination Studies

  • Best for: Utilities that require effective grounding or coordination verification.
  • Why it matters: ASPEN is widely used for short-circuit and protection studies required for inverter and equipment coordination.
  • Deliverables: .olr file + functional model overview
  • Ideal for: Relay settings, fault current analysis, and breaker coordination.

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