html{display:none} Transmission Planning | Schweitzer Engineering Laboratories

Transmission Planning

Analysis and Design Covering a Wide-Range of Scenarios

Transmission Planning

SEL offers transmission planning analysis and design services over a wide range of study scenarios, from 69 kV to 525 kV. Using the GE PSLF software package and user-written tools, we can perform Western Electricity Coordinating Council (WECC) path-rating studies, FERC generator interconnection studies, wires-to-wires interconnection studies, NERC compliance studies (MOD-026, MOD-027, PRC-006, and PRC-019), import/export studies, load-serving studies, and underfrequency load shedding (UFLS)/undervoltage load shedding (UVLS) studies. We will provide hard and electronic copies of all reports and models for future use. With over 30 years of experience, we can analyze and provide recommendations for a variety of planning and operating power system scenarios. 

Software tools include:

  • GE PSLF and ProvisoHD transient, post-transient, and voltage stability analysis
  • CAPE and ASPEN breaker duty and relay coordination studies
  • EasyPower power flow and short-circuit analysis
  • SKM Power*Tools power flow analysis, short-circuit analysis, and motor starting
  • Simulink/Simscape

Contact Engineering Services


Key Offerings

  • Black start assessment, motor-starting analysis, and reactor-sizing studies.
  • Determine facility equipment/operating practices for reliably meeting existing and future load needs.
  • Identify facilities necessary for new generators while meeting FERC generator interconnection requirements.
  • Fulfill compliance requirements for NERC modeling and planning standards.
  • Perform transmission regulatory studies to meet state resource planning statutes.
  • Diagnose and analyze local- and wide-area power system disturbances, and provide recommendations.
  • Transformer emergency loading above nameplate rating calculations.

Southeast Power Study

SEL provides WECC path-rating (as seen below), total transfer capability (TTC), and transfer capability study services as part of our transmission planning services. We can perform studies at all voltage levels 69 kV and above. In addition to cut-plane studies, we can perform transmission service and export capability studies upon request. Import capability studies, including reliability must-run (RMR) analysis, are available. We can also perform out-of-step studies, breaker duty studies, relay coordination, and remedial action scheme design.


Example Reports

As part of any analysis or design effort, SEL can provide both transient and post-transient assessments for whatever the need. Transient stability analysis (left) includes but is not limited to model validation and NERC MOD-026 and -027 acceptance studies. We can perform Q-V and P-V post-transient analysis (right) on any size of system. In addition, we can perform reactive margin studies and voltage and thermal overload studies on high-voltage (HV) to extra-high-voltage (EHV) systems.



Documents sorted by newest first.