PNNL-27032 Adaptive RAS/SPS System Settings for Improving Grid Reliability and Asset Utilization through Predictive Simulation and Controls Task 1 Report – Survey on RAS/SPS modeling practice October 2017 J O’Brien R Huang E Barrett Q Huang X Fan R Diao Prepared for the U.S. Department of Energy under Contract DE-AC05-76RL01
18
Embed
Adaptive RAS/SPS System Settings for Improving Grid ...
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
PNNL-27032
Adaptive RAS/SPS System Settings for Improving Grid Reliability and Asset Utilization through Predictive Simulation and Controls
Task 1 Report – Survey on RAS/SPS modeling practice
October 2017
J O’Brien R Huang
E Barrett Q Huang
X Fan
R Diao
Prepared for
the U.S. Department of Energy
under Contract DE-AC05-76RL01
PNNL-27032
DISCLAIMER
This report was prepared as an account of work sponsored by an agency of the United
States Government. Neither the United States Government nor any agency thereof, nor
Battelle Memorial Institute, nor any of their employees, makes any warranty, express
or implied, or assumes any legal liability or responsibility for the accuracy,
completeness, or usefulness of any information, apparatus, product, or process
disclosed, or represents that its use would not infringe privately owned rights.
Reference herein to any specific commercial product, process, or service by trade name,
trademark, manufacturer, or otherwise does not necessarily constitute or imply its
endorsement, recommendation, or favoring by the United States Government or any
agency thereof, or Battelle Memorial Institute. The views and opinions of authors
expressed herein do not necessarily state or reflect those of the United States
Remedial Action Schemes (RAS) or Special Protection Schemes (SPS) are used throughout the bulk
transmission system as a non-wires method of increasing transmission transfer capability. However, as
the population grows within the Western Interconnection, more power needs to be transferred with less
ability to build lines. This leads to a greater number of RAS, and the subsequent interaction between
these disparate schemes can have unintended consequences.
While the large number of RAS within the Western Electricity Coordinating Council (WECC)
protect for different things, which can range from the violation of thermal limitations to transient stability
issues, they can be described by common methods of operation. In order to understand these methods, a
survey was sent out to members of the WECC Modeling & Validation Working Group (MVWG). The
response received provides a necessary base in which to understand and build models that can be used
within WECC.
This report provides information on the survey results regarding RAS/SPS modeling practices for
planning and operational studies within the WECC footprint, which is foundational for on-going and
future work on RAS. Pacific Northwest National Laboratory (PNNL) and its industry partners are
developing innovative methods for adaptively setting RAS parameters based on realistic and near real-
time operational conditions to improve power grid reliability and grid asset utilization.
iv
Summary
A survey was conducted on RAS within the WECC footprint to develop a comprehensive
understanding of RAS operating within the system as well as how these RAS are modeled within
software. Establishing this situational awareness is foundational to work moving forward as PNNL
collaborates with PacifiCorp and Idaho Power Company to develop innovative methods for RAS
modeling and adapative parameter settings.
This report provides a summary of these survey results, including the classification of these RAS
based on their objective, action and initiating condition. One key finding of this survey is that most
modeling practices involve manually defining the RAS within the contingency definition based on pre-
determined actions. This can create discrepancies between how RAS operates within the system and how
it is modeled.
v
Acknowledgments
We would like to thank DOE AGM project manager, Alireza Ghassemian, for his insightful
suggestions and comments to ensure the good-quality delivery of this project.
We also would like to thank all the survey participants within the WECC footprint.
vi
Acronyms and Abbreviations
WECC Western Electricity Coordinating Council
BPA Bonneville Power Administration
EMS Energy Management System
FERC Federal Energy Regulatory Commission
RAS Remedial Action Scheme
SPS Special Protection Scheme
MVWG Modeling and Validation Working Group
NERC North American Electric Reliability Corporation
RMVTF RAS Modeling and Validation Task Force
MSRATF Modeling Special Protection and Relay AdHoc taskforce
LLL Line Loss Logic
CTG Contingency
vii
Contents
Abstract ............................................................................................................................................. iii
Summary ............................................................................................................................................ iv
Acknowledgments ............................................................................................................................... v
Acronyms and Abbreviations ............................................................................................................ vi