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Using Synchrophasors for Preventing Cascading Outages CAMS/RRPA Panel Session Mitigation and Prevention of Cascading Outages: Methodologies and Practical.

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Presentation on theme: "Using Synchrophasors for Preventing Cascading Outages CAMS/RRPA Panel Session Mitigation and Prevention of Cascading Outages: Methodologies and Practical."— Presentation transcript:

1 Using Synchrophasors for Preventing Cascading Outages CAMS/RRPA Panel Session Mitigation and Prevention of Cascading Outages: Methodologies and Practical Applications PES General Meeting, Vancouver, Canada July 24, 2013 Eric Heredia (BPA) and Ryan Quint (BPA) on behalf of Dmitry Kosterev (BPA)

2 BPA “Defense in Depth” approach  Reliability starts with good planning – long-range and operational planning … But, actual system conditions are often different from what is planned …  State estimator based real time contingency analysis … But, your model may be wrong (model errors, control failures, etc) … … or a dispatcher may not have adequate time to respond to an event …  Intrinsic indicators of system stability IEEE Boise, Nov 16,

3 BPA PMU Project 5-year, $35M investment began in 2010 PMU Installation – 50 substations and wind sites – 120 PMUs installed Control center upgrades for system operators – PDCs, Applications, Archives Wide Area Controls (RAS ) IEEE Boise, Nov 16,

4 Applications The value of the investment will be realized through the deployment of applications Engineering Applications – Understand system performance issues, make better capital investments, set safer operating limits Real-Time Wide-Area Situational Awareness – Give grid operators better visibility of the system state Wide Area Controls – Increase stability limits IEEE Boise, Nov 16,

5 Model Validation for Better Planning BPA has installed PMUs at power plant POIs General Electric Company implemented disturbance playback function in GE PSLF BPA developed Power Plant Model Validation (PPMV) application using PMU data ~ Record: -POI bus voltage -POI bus frequency -Power plant MWs and MVARs Point of Interconnection VI

6 Model Validation for Better Planning What a good models looks like: Blue line = actual recording Red line = model Voltage and frequency are inputs Active and reactive power are “measures of success”

7 Model Validation for Better Planning What a bad model looks like: Blue line = actual recording Red line = model Voltage and frequency are inputs Active and reactive power are “measures of success”

8 Mode Meter Mode Meter (Active) – Developed by Dan Trudnowski at Montana Tech – Application estimates frequency and damping of inter-area oscillations from ambient data – Available to BPA dispatchers – Operating procedures are under development IEEE Boise, Nov 16, Display of oscillation trend

9 Oscillation Detection Application Oscillation Detection Application (Active) – Developed by Dan Trudnowski at Monata Tech – Scans voltages, frequencies, active and reactive power for signs of sustained or growing power oscillations – Applied to interties, load centers and generating facilities IEEE Boise, Nov 16, The oscillation spectrum is divided into four frequency bins A bin turns to red when a sustained oscillation is detected

10 How can we use angles?

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12 Wide-Area Stability Controls Wide-Area Stability Controls (Under Development) – Takes synchronized wide-area measurements to determine voltage stability risks – Enable fast switching of reactive devices IEEE Boise, Nov 16, Timely actions are needed to ensure the system stability

13 Defense in Depth Study

14 Value of Synchrophasor Investment IEEE Boise, Nov 16, Improved capital investment – Better understanding of the system risks through deployment of engineering analysis applications Improved reliability and large scale outage avoidance – Better situational awareness by dispatchers of oscillation and voltage stability risks – Wide area control schemes and defense in depth to deal with extreme events Reliable wind integration – Improved modeling, validation – Dynamic transfer capability


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