1. NASPI overview and update
Alison Silverstein
NASPI Project Manager
WECC JSIS
March 3, 2015

2. Overview Updates Synchrophasor software exchange
October 2014 NASPI meeting
March 2015 NASPI meeting
Model validation paper
Equipment mis-operations paper
Current NASPI priorities and concerns
Synchrophasor software exchange
Synchrophasor maturity model
Preview – EPRI presentation on synchrophasor technology for stability analysis

3. Meeting updates October 2014 NASPI meeting
Theme – what we’ve learned from the SGIG projects
Technical sessions – operations; big data
Technical workshop – oscillation detection and voltage stability tools comparison
March 2015 NASPI meeting
Theme – research advances – 80 (!) presentations and posters
Technical focus – renewables; distribution
Technical workshop – state estimation & synchrophasors

4. Paper updates Model validation Equipment mis-operations
Focus – using PMU data to validate and calibrate models of power plants and other grid assets, to improve operating reliability, planning accuracy, and lower costs
Paper being shortened, should be completed and published by DOE before the March NASPI meeting
Equipment mis-operations
Focus – using PMU data to identify grid assets that are failing or mis-behaving, to improve operational reliability and avoid emergency replacement costs
Paper and summary to be completed and published by DOE before March NASPI meeting

5. Synchrophasor software exchange
NASPI-curated, PNNL-hosted collection of FREE software that can be used for synchrophasor-related uses, including:
Analytical applications using PMU data
Data cleaning
Communications network management
Device and network commissioning
Cyber-security
Software to be posted on GitHub and other host sites, but collected and organized on NASPI Software Exchange site
Software must be free to consumers, but they must obey all contributor-specified intellectual property restrictions.

6. NASPI Proposed Maturity Model for Synchrophasor Deployment
Alison Silverstein (NASPI)
Ryan Quint (Dominion Virginia Power)
Kyle Thomas (Dominion Virginia Power)
Dmitry Kosterev (BPA)
WECC Joint Synchronized Information Subcommittee Meeting (JSIS)
April 2015

7. These are semi-new ideas
This proposed framework needs your review and thoughtful feedback, please!

8. Why a maturity model for synchrophasor technology?
It’s a useful roadmap for effective synchrophasor deployment
It highlights the important role of business practices and institutional support in successful technology adoption and deployment
It’s useful as an organizational self-assessment tool
It can foster consensus around the path to full technology integration and effectiveness

9. Key pillars in synchrophasor technology maturity
Infrastructure
Hardware -- PMU and PDC deployment
Security and cyber-security
Institutional infrastructure – technical interoperability standards, regulatory acceptance
Communications
Data delivery networks – quality and scope
Interoperable architecture and systems
Data quality
End-to-end collection and delivery of accurate data
Detection of bad data
Metrics and measurement
Analytics and utilization
Applications that perform useful functions effectively
Applications that users value, want and use
Business practices
Commitment and ownership
Training
Maintenance and support
Data-sharing

10. Maturity level definitions
Level 5: Integrated, highly mature
Highly operationalized usage
Full business processes and institutional support for system and uses
Level 4: Operationalized
High levels of reliability and robustness
Focus on operational or business uses & value
Level 3: Implementation
Growing deployment, improvement, debugging process
Level 2: Development
Developing tools, techniques, processes, infrastructure
Prototyping and proving effectiveness
Level 1: Conceptualization

11. Proposed Synchrophasor Maturity Matrix
Infrastructure
Communications
Networks
Data Quality
Applications
Level 5
Integrated, highly mature
Level 4
Operationalized
Level 3
Implementation
Level 2
Development
Level 1
conceptual

12. Business processes Infrastructure Communications Network Data Quality
Applications & Utilization
INSTITUTIONAL SUPPORT
* Each pillar needs to be assessed uniquely, and in conjunction with others
* Institutional support is an integral part of each of these pillars
* It is the ultimate level of maturity

13. Integrated, highly mature
Some considerations:
Different pillars are maturing at different paces; some are harder, slower (standards), or require more money or technology, or have regional differences.
A company may advance in one pillar more quickly than in others.
Company maturity differs from technology maturity.
Infrastructure
Commns
Networks
Data Quality
Applications
Level 5
Integrated, highly mature
Level 4
Level 3
Level 2
Level 1
conceptual

14. Feedback & discussion
We think this could be a useful tool to help understand synchrophasor technology adoption pace and differences.
We are looking for your feedback to help develop this framework.
Please provide and comments/feedback to:
Ryan Quint –
Alison Silverstein –

15. Synchrophasor-Based Stability Assessment Tools
Alison Silverstein
NASPI Project Manager
EPRI Grid Operations & Planning Advisory Council
March 4, 2015

16. Overview NASPI intro PMU data for state estimation
Works better with PMU-based model validation
PMU tools for oscillation detection
PMU tools for voltage stability monitoring
PMU tools for frequency response monitoring
PMU tools for rotor angle stability monitoring
Conclusions

17. What’s NASPI?
The North American SynchroPhasor Initiative is a collaborative effort between the electric industry, government, vendors & academia to advance the adoption and value of synchrophasor technology for grid reliability and efficiency
900+ members, international scope
Two meetings/year plus technical workshops
Begun in 2005; funding from NERC; funded shifted to DOE in 2014 with EPRI support
Accomplishments
Developed key standards and guidelines for synchrophasor technology
Pushing technology on PMU device functionality, network design, data quality, applications needs, and more
Guidance and lessons learned for ARRA-SGIG and demo projects
Archives at

18. State estimation tools
State estimation tools are the foundation for PMU-based power system analysis efforts.
The system and asset models within state estimation tools can be improved through model validation and calibration against recorded PMU data.
NASPI workshop on model validation in October 2013; DOE-NASPI technical paper out in March 2015
Over the past year, there have been major advances in the development of linear state estimators using PMU data and improvements to existing state estimators incorporating PMU data.
NASPI workshop on state estimation on March 25, 2015

19. Oscillation detection tools
Desired functionality for PMU-based oscillation detection tools:
Scans voltages, power and frequency at interties, power plants, DC ties, wind hubs for sustained oscillations in key frequency bands
Alarms when a sustained oscillation is detected with detailed modal analysis
Trend displays available for problem drill-down
Facilitate decision support tools for grid management
Engineering support applications for baselining and setting alarm thresholds

20. Oscillation detection tools
Comparison of (mostly) commercially available oscillation detection tools at NASPI October 2014 technical workshop.
Examine tool performance against two real cases – five sequential oscillation ringdown events (5 vendors) and generator-caused forced oscillation (5 vendors).
Conclusions
PMU-based oscillation detection tools are maturing quickly
Diverse analytical methods underlying the OD tools, and results vary.
Source: NASPI

21. Sample screens from NASPI oscillation detection tools test
SEL
ABB
Alstom Grid
EPG

22. Analyze oscillatory modes and events
Mode monitors in use at WECC, BPA, ISO-NE, ERCOT, PJM, MISO, CAISO, Duke Carolinas, FPL, others
Recent WECC discoveries about interconnection-wide modes
[Source: JSIS meeting 10/13]

23. Voltage stability tools
Desired functionality for PMU-based voltage stability tools:
Identify voltage instability events and characteristics, including time of event start and inflection points, locations of voltage problems, real and reactive power margins.
Identify insecure N-0 and N-1 operating conditions, reason for unacceptable condition, and security and stability margins.
Enable decision support tools for voltage stability protection

24. Voltage stability tools
NASPI technical workshop comparing commercially available voltage stability analysis tools in October 2014.
Tested stability tools against a wind hub-caused voltage excursion (5 vendors) and a load center voltage stability case including contingency analysis (2 vendors)
Results – wide variations in analytical conclusions of events. Tools using PMU data in linear state estimation-contingency analysis models out-performed those doing measurement-only analysis.

25. Sample screens from NASPI voltage stability tool test
Alstom Grid
V&R Energy
ABB
EPG

26. Frequency response monitoring
Desired functionality for PMU-based frequency response analysis tools:
Detect under-frequency events
Detect areas where the generation loss occurred
Frequency response baselining – interconnection-wide or for balancing authority
Compliance with NERC BAL-003 Frequency Response Reliability Standard
Early stage frequency monitors
BPA
Dominion
BPA Frequency Disturbance Monitor

27. Rotor angle stability tools
Desired functionality:
Monitor the torque balance between mechanical input and electromagnetic output in a prime mover
High resolution, time-synchronized measurement of the rotor shaft angle
Determine safe operating zones
Alarm when potential imbalance conditions could result in stability risks and rotor harm

28. Rotor angle stability monitor
SDG&E-SEL-OSIsoft-UCSD research project using PMUs inside a combined cycle plant for rotor speed & angle measurement and field measurement – monitoring equipment installed early 2014 Data collection, model validation and parameter measurement to follow
Source: SDG&E

29. Sources and more information
NASPI website and archives:
NASPI model validation technical workshop --
October 2013 at
NASPI oscillation detection and voltage stability technical workshop – October 2014 at
NASPI state estimation technical workshop – March 2015 at
SDG&E presentation on rotor monitoring -- October 23, 2014 at
Coming soon to
New papers on using synchrophasor data for model validation and diagnosing equipment mis-operations
NASPI Synchrophasor Software Exchange