1. Modification of MOD-010 through MOD-015

2. Bad modeling can lead to bad decisions
August 10, 1996 WSCC Outage
Real event
Dynamic
simulations
Bad modeling can lead to bad decisions

3. What We Must Achieve WECC Confidence today Real event Simulations
Simulations of June 14, 2004
Frequency
COI power
- grid frequency
- COI power
Real event
Simulations

4. Background Modeling Improvements Initiative Loosely Initiated in 2006
Basis
NERC Recommendation 14 and US-Canada Task Force Recommendation 24
Both called for improvements in quality of system modeling data and data exchange practices
Focus of whitepaper is on MOD-010 through -015 Standards
MOD-010, -011, and -014 address steady state data and model development
MOD-012, , and address dynamic data and model development
MOD-011, MOD-013, MOD-014 and MOD-015 were not approved by FERC Order No. 693
Tenets of Modeling & Studies
If something in not modeled, how can you predict system behavior or interaction????
To predict performance, you must understand the system’s behavior.
To understand the system’s behavior, you must observe and measure its actual behavior.
Once you understand the system’s behavior, you must be able to model it.
Once you are able to model the system’s behavior, you can predict its performance.

5. Key Issues with MOD-010 through -015
Lack of clear delineation of responsibilities for providing and receiving data and models
Lack of specificity in:
certain data and model requirements
Performance requirements of models under static and dynamic conditions.
Newer Reliability Standards such as TPL require a level of modeling not supported
How to deal with “proprietary” models
CEII and non-disclosure agreements
Models for new technology are introduced in a non-uniform manner

6. Suggested Improvements
Reduction in the number of MOD standards
For example, two standards: one for steady state and one for dynamic models
Add Short Circuit data to MOD standards
Add specific requirements to supply data and models
Identify what data is to be provided, who is responsible to provide it and, who should receive it
Define acceptability/performance requirements for both powerflow and dynamics
Require standard format for data and model exchange
How to deal with new technology
Model Validation including new technology models provisions

7. Question?