2009-09-22 Power Systems Control and Stability I

2009-09-22 Power Systems Control and Stability I - Power...

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Power Systems Control and Stability Jovan Ilić ECE 18-418 Fall 2009
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Electrical Energy Providing Issues • Real and reactive power delivery control – Stable voltage levels – Acceptable variations in frequency – Acceptable power quality • Stability and reliability of power delivery – Unpredictable load perturbations – Predictable control action effects
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Electrical Power System Essentials Introduction (1) [2] • The customer expects electrical power at constant frequency and voltage • The system load changes continuously • Electricity can not be stored in large quantities • Maintaining the balance between generation and consumption
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Electrical Power System Essentials Introduction (2) • The active power balance is controlled by generators • Another method is load shedding • The reactive power balance is controlled by generators and static components • The synchronous generator plays an important role
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Electrical Power System Essentials Increase of Active Power Consumption Kinetic energy in the rotating parts of the generator and turbine are 200 MJ Suddenly a 10 MW load is connected. What happens to the frequency?
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2009-09-22 Power Systems Control and Stability I - Power...

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