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Lecture 4 - Power System Protection

1 1 Lecture 4 Power System Protection 2 Course map 2 3 Outline of the Lecture Control vs Protection Protection Principles Protection requirements Protection Schemes 4 Control vs. Protection 3 5 Why do we need to control? Control actions needed Automatic Equipment Protection Disonnection at fault Voltage control Move a tapchanger in a transformer Human intervention Frequency control Increase output in hydro plant Voltage control Connect capacitor bank 6 What can we control?

Different Types of Protection 16! Assets in a Power Grid (value) 9! 17! Fault types 18! Fault Statistics . 10! 19! Line fault statistics 20! Outline of the Lecture • Control vs Protection • Protection Principles • Protection requirements • Protection Schemes . 11! 21!

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