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...Steady state stability the of system mainly depends on behaviour synchronous machines after a disturbance power is divided into two types depending upon magnitude disturbances transient it refers to ability regain its synchronism speed frequency all network are same slow and small which occurs due gradual changes subdivided dynamic denotes reach stable condition very only for seconds also known as signal fluctuation in load or generation level static that obtains without aid benefit automatic control devices such governors voltage regulators defined return normal conditions large sudden removal line switching operations fault outage etc dynamics machine kinetic energy rotor at where ws p wsm but we shall define inertia constant h immediately follows m called taking g base pu u pi f i...