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Planning Models

Transmission system models provide the foundation for our planning process. We build reliability (Powerflow and Dynamics) and economic models to support the core planning functions necessary to ensure compliance with our Tariff and North American Electric Reliability Corporation (NERC) standards. We employ a collaborative stakeholder driven process to develop assumptions that ensure appropriate modeling of future transmission system scenarios. Models are also coordinated with our neighboring entities to ensure systems are accurately represented across our seams.

Process and Timeline

Models developed by MISO are used for a variety of near-term and long-term planning studies. On an annual basis, we build models to represent a 10 year planning horizon. The modeling process begins in September and concludes the following August. Our staff reviews the data provided by stakeholders for reasonableness, and compiles it into a set of models. Throughout the process, models we review models for reasonableness of data and performance. Stakeholders review draft models and provide us with feedback before they become final.

Our Modeling Tools

  • Siemens PTI Model on Demand (MOD) database
  • Siemens PSS/E for Powerflow and Dynamics
  • Ventyx PowerBase database and PROMOD for economic studies

Our Models

Powerflow

  • Current year for summer, fall, winter and spring
  • 2-year out summer peak and light load
  • 5-year out summer peak, winter peak, shoulder and light load
  • 10-year out summer peak load

Dynamics

  • Utilizes the 5-year out summer peak, shoulder and light load, and 10-year out summer peak powerflow cases

Economic (PowerBase)

  • Utilizes current, 5-year and 10-year summer topology

Model Development Schedules

 Date

 Milestone

 02/21/2018  

MISO issues dynamics data request

 03/23/2018  

Stakeholders complete dynamics updates and send to MISO

 03/29/2018  

MISO posts draft PSSE and TSAT models for review. Stakeholder review starts.

 04/13/2018  

Stakeholders comments on draft models due to MISO

 04/27/2018   

MISO incorporates changes from draft review

 04/30/2018

MISO posts final PSSE and TSAT models

 Date

 Milestone

 01/17/2018

 PAC reviews futures

 03/20/2018

 MTEP19 Futures Workshop

 06/01/2018

 PAC review generator siting methodology

 08/01/2018- 09/30/2018

 EPUG reviews Expansion Results & Preliminary Siting

 09/10/2018

 Model Posted without future RRF units for stakeholder review

 10/01/2018

 10/26/2018

 11/16/2018

 Stakeholder feedback on PROMOD model due

 Model Posted with future RRF units for stakeholder review

 Stakeholder feedback on PROMOD model due

 12/07/2018

 Finalize MTEP19 PROMOD model

 Date

 Milestone

 Responsible     Party

 08/28/2017

 LSE, TO, and GO data request sent

 MISO

 08/31/2017

 Model On Demand reference models posted

 MISO

 09/13/2017

 Generator data due to Model On Demand

 GO

 09/25/2017

 Load profiles  due to Model On Demand

 LSE

 09/28/2017

 Transmission project , BLG profile, and device profile data due to Model On Demand

 TO

 10/17/2017

 Topology and Load Pass  model posted for review

 MISO

 10/17/2017 – 11/1/2017

 Review Topology and Load Pass models    / updates to MOD

 LSE, TO, and GO

 12/27/2017

 Review Pass 3 models posted for review

 MISO

 12/27/2017 - 01/31/2018

 Review of Review Pass models, respond to data checks  / updates to MOD.

 LSE, TO, and GO

 03/09/2018

 Final MTEP models completed / posted

 MISO