EEE591Ch13-1

EEE591Ch13-1 - 1 POWER SYSTEM STABILITY CHAPTER 13-1 2...

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Unformatted text preview: 1 POWER SYSTEM STABILITY CHAPTER 13-1 2 Power System Stability Will study Power System Stability as opposed to Control System Stability (EEE341) Types of Power System Stability: Angle Stability Voltage Stability Frequency Stability We will concentrate on Angle Stability 3 4 5 6 ANGLE STABILITY A power system is extensive with thousands of transmission lines and hundreds of generators. It is essential that all of the generators in the system are in synchronism. Generators are in synchronism when the voltage at their terminals have the same average frequency. Angle stability exists when all synchronous generators in the system remain in synchronism following a disturbance. Instability occurs when one or more generators lose synchronism with the remainder of the system generators. 7 ANGLE STABILITY Types of Angle Stability : Small Disturbance (used to be called Steady State ) Large Disturbance or Transient Other terminology: Dynamic Stability (not an acceptable term because it means different things to different people) Static Stability (next slide) 8 Static Stability ) ( R S SR R S E Sin X V V P - = P M1 P M2 P M3 P E (max) 1 2 90 o P M = Mechanical Power controlled by valve position P E (max) = Static stability limit 9 TRANSIENT STABILITY Turbine Generator P M P E P A Line 1 Line 2 System G1 P M Rotor Bus B Arm. P A P E Bus B Bus A X 3-Phase Fault Typical Stability Problem: 1) 3-phase fault 2) Bus A voltage: V A = 0 3) ) sin( 12 =- = B A L B A E X V V P 4) P A = P M- 0 P A = P M- P E 10 TYPICAL STABILITY PROBLEM Line 1 Line 2 System G1 P M Rotor Bus B Arm....
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This note was uploaded on 02/21/2010 for the course EEE ??? taught by Professor Farmer during the Spring '10 term at ASU.

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EEE591Ch13-1 - 1 POWER SYSTEM STABILITY CHAPTER 13-1 2...

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