Phasor measurement units (PMU) calculate synchronized phase angle measurements which are useful for angle stability analysis. Wide-area monitoring systems (WAMS) can communicate these measurements to a central location in nearly real time. Wide -area control actions such as disconnection of loads and generators and fast power changes on DC interties can sometimes be used to prevent loss of synchronism. Loss of synchronism between groups of synchronous generators in a power system is a form of instability that tends to produce large-scale blackouts when it occurs.

Chapter Contents:

• 8.1 Introduction
• 8.2 Simulated measurements and control
• 8.2.1 Phasor measurements
• 8.2.2 Wide-area one-shot control combination
• 8.2.3 Simulations for training and test data sets
• 8.3 Indices for event detection and one-shot control
• 8.3.1 Integral square generator angle index
• 8.3.2 Square bus angle index
• 8.3.3 Bus magnitude indices
• 8.3.4 Illustration of indices during and after a fault
• 8.4 DTs for response-based control
• 8.4.1 Training DT for one-shot control
• 8.4.2 Training DT for event detection
• 8.4.3 Assessing performance of DTs for one-shot control
• 8.5 Simulations without event detection
• 8.6 Simulations with event detection
• 8.7 Conclusions
• Acknowledgments
• References

Inspec keywords: power system stability; phase measurement; power system control; synchronous generators; stability; synchronisation; phasor measurement; angular measurement; power system reliability

Other keywords: large-scale blackouts; synchronous generators; wide-area monitoring systems; PMU; WAMS; angle stability analysis; response-based event detection; synchronized phase angle measurements; one-shot wide-area stability controls; phasor measurement units; power system

Subjects: Phase and gain measurement; Power system measurement and metering; Spatial variables measurement; Synchronous machines; Power system control; Reliability; Stability in control theory; Control of electric power systems