The Power system stability is very significant to operating condition. If you want to make your system working well, the power system stability must be controlled seriously.
In the event of a significant load/generation mismatch, generator and prime mover controls become important, as well as system controls and special protections. If not properly coordinated, it is possible for the system frequency to become unstable, and generating units and/or loads may ultimately be tripped possibly leading to a system blackout.
This aspect of stability is influenced by the dynamics of generator rotor angles and power-angle relationships. Instability may also be encountered without the loss of synchronism. For example, a system consisting of a generator feeding an induction motor can become unstable due to collapse of load voltage. In this instance, it is the stability and control of voltage that is the issue, rather than the maintenance of synchronism. This type of instability can also occur in the case of loads covering an extensive area in a large system.
In addition, the power system stability give a huge effects for the entire system. There fore, in some industries they attach specialist persons as employee to make the power system always in a good and stable condition.
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