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Outline

Outline. Introduction SMART Working Group and the First Meeting Update Peak Synchrophasor Technology Roadmap Linear State Estimator (LSE) Implementation Inter Area Oscillation Monitoring (Mode Meter) Implementation Forced Oscillation Detection and Source Locating (FODSL)

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Outline

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  1. Outline • Introduction • SMART Working Group and the First Meeting Update • Peak Synchrophasor Technology Roadmap • Linear State Estimator (LSE) Implementation • Inter Area Oscillation Monitoring (Mode Meter) Implementation • Forced Oscillation Detection and Source Locating (FODSL) • Wide Area Angle Separation Monitoring • Conclusion

  2. Introduction • Peak has been working on Synchrophasor technology since 2012 • Peak is turning focus to control room solution (CRS) implementation 3 1 2

  3. Where We Are Now? • Receive ~400 PMUs live data from entities and enable PMU signals being down sampled into EMS to achieve a hybrid SE Solution. • Perform System Model Validation (MOD-033) study against system events using PMU data • Build an accurate simulation case of a real event in hours using West wide System Model (WSM) and PowerTech TSAT and GE/PSLF tools • Run GE (formerly Alstom Grid)-PhasorPoint (PP) and MontanaTech MAS/Mode Meter for inter area oscillation modes and wide area angle separation monitoring in real time for baselining study

  4. Peak PMU Map, Statistics & Progress Highlight

  5. Peak SMART Working Group (WG) Update • Purpose: Operationalizing PMU Technology • To investigate, collaborate, and to remove obstacles for the implementation and operator use of advanced Synchrophasor and real-time network applications in control room settings. • Membership: Operating entities of Peak members and WECC in the context of the Peak UDSA. • Reporting: SMART reports to WECC JSIS and Peak RC User Group meetings * For SMART Charter et al details, go to https://www.peakrc.com/whatwedo/SMART/Pages/default.aspx, or https://www.peakrc.org/synchrophasor/Pages/PublicDocs.aspx

  6. 1st SMART WG Meeting Debrief • Twenty representatives from Peak Reliability, BPA, WECC, CAISO, PG&E, SCE, SDG&E, IPC, WAPA, SRP et al entities approved the SMART Charter and organization chart unanimously. Thanks for all! • Main presentation topics: • BPA’s operation experience with oscillation detection • Online TSAT Implementation by Peak and CAISO • PMU data quality update by Peak, PG&E, SDG&E • 2017 Solar Eclipse Observations by CAISO & Peak • The meeting decided on the SMART goals for next 12-18 months • Operationalizing online TSAT and Oscillation Detection tools; sharing PMU data and SMART use cases

  7. Peak Synchrophasor Technology Roadmap • Peak aims to implement and/or operationalize proven PMU technology tools for control room solution (CRS), including • Online EPG’s enhanced LSE software for situational awareness • Baseline MontanaTech MAS/Mode Meter tools for Inter-area oscillation modes monitoring and alarming in real-time • Collaborate with BPA and other entities for low damping alarming & control • Online Washington State University-WSU’s oscillation monitoring system (OMS) tool for forced oscillation detection & source locating • Wide area Angle Difference Monitoring

  8. LSE Implementation Roadmap

  9. LSE Layer in PI-ESRI Visualization Platform • Show LSE Solutions in Geospatial and Weather (live) Visualization Platform

  10. LSE for Monitoring Solar and Wind Generations • Solar and Wind Generations heavily depends on Weather Conditions • LSE shall provide fast estimation of renewable generation changes

  11. MAS/Mode Meter Implementation Roadmap • Peak implemented MontanaTech MAS engine in GE PhasorPoint (PP) and integrated PP/MAS solution results into EMS via Grid Stability Assessment (GSA) • MAS results are now available in EMS and PI Historian • Next step is Mode Meter baselining & correlation study

  12. Impact of Paths 1 & 83 Outages to N-S Modes • Started around 09/25/2017 9:00 am, Peak’s Oscillation Detection Tools show N-S Mode A as unavailable when AESO was connected to WECC via 138kV line • NS Mode B shows Oscillation Frequency as 0.32/0.33 Hz

  13. Observations and Remarks • N-S Mode A and N-S Mode B will collapse into one when • AESO is islanded or • AESO is connected by one 138 kV line (weak link) • Mode Meter results are affected • N-S Mode A disappeared • N-S Mode B damping ratio is biased • Peak targets to collaborate with BPA and other entities on real-time system oscillation monitoring and damping control

  14. Forced Oscillation Detection Roadmap • Peak validated WSU Oscillation Monitoring System (OMS) tools in Engineering Lab for • Forced oscillation detection in real-time. • Source locating algorithms using SCADA measurements. • The tools were used to find various forced oscillations, including one Resonant Oscillation on COI. line flow oscillation

  15. FODSL Tool User Interface in PI Processbook • A GIS based overview to present: • Forced Oscillation Detector • Start/end time, oscillation frequency, damping ratio, oscillation energy, confidence level • Average normalized mode shape, length = magnitude, east = 0 degree angle • Oscillation Source Locator • PMA result (red), MVRA result (white) • Area = ranking index • The tool can be integrated in PI-ESRI Platform in the future

  16. FODSL PI Processbook Visualization Tool

  17. Real-Time FODSL Output Results(08/18/2017-09/07/2018) • From the FODSL tool at Engineering Lab, we noticed hundreds of oscillation event alarms in Fig-1. By filtering those with damping <3% and confidence level>75%, we identified a subset of likely sustainable oscillations in Fig-2. We chose one 1.23 Hz oscillation event in Fig-3. Fig-3: Fig-2: Fig-1:

  18. Examples of Possible Forced Oscillation Events Natural Gas Turbine Hydro unit Coal Fire COMBCYC-NGAS Hydro unit Wind Farm

  19. Wide Area Angle Difference Alarming Roadmap • Enable alarming wide area angle difference exceedance by comparing LSE solved bus angle differences with real-time TSAT calculated bus angle difference limits Wide area Angle Difference Online TSAT Calculated Limits of Path Flow vs Angle

  20. Conclusion • Values of Synchrophasor data and technology, and use cases for Control room have been demonstrated till date • The roadmap for the next step is to operationalize those new tools in our Control room for operational use and benefits • Peak desires to extend values and use cases of the new tools to our member entities by collaboration and sharing of Synchrophasor application solutions

  21. Hongming Zhang, hzhang@peakrc.com

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