STEADY STATE,TRANSIENT AND DYNAMIC STABILITY
Steady state stability is the ability of an electrical machine or power system to regain its original state after its operation or we can say that stability is the ability of a system to regain its original state after a disturbance occurs. We know that the power is obtained from the synchronous generators which has a synchronism operation.
The generator is synchronized with a bus provided both of them need to have the same voltage ,frequency and phase .So basically steady state stability is to attain stability without loosing its synchronism.
Stability is basically of three types Steady State,:-
Transient and Dynamic Stability
Basically the steady state stability are consent to small gradual changes only. Here concentration on restricting the bus voltages close to their nominal values are emphasized . It is to be ensured that phase angles between two buses are not too large and check for the overloading of the power equipment and transmission lines. These are often done using power flow studies. Transient Stability is one of a major factor as it involves the major disturbances. On getting a large disturbance the synchronous alternator,the machine power (load) angle changes due to sudden acceleration of the rotor shaft. The dynamic stability involves small scale disturbances . These small disturbances occur due regular fluctuations in loads and generation levels. In case of interconnected power system, the fluctuations can lead catastrophic failure as this may force the rotor angle to increase the steadily.
QUESTIONS AND ANSWER
1.WHAT ARE THE THREE TYPES OF STABILITY IN POWER SYSTEM?
ANS:- STATIC,DYNAMIC AND TRANSIENT.
2.WHAT IS POWER SYSTEM?
ANS:- POWER SYSTEM CAN BE DEFINED AS GENERATION TRANSMISSION AND DISTRIBUTION OF POWER.