2T - Power System Transient Stability Study Fundamentals

Description:

The ability of a power system, containing two or more synchronous machines, to continue to operate after a change occurs on the system is a measure of its stability. The stability problem takes two forms: steady-state and transient.

Steady-state stability may be defined as a power system's ability to maintain synchronism between machines within the system following relatively slow load changes. Transient stability is the system's ability to remain in synchronism under temporary conditions, i.e., faults, switching operations, etc. In an industrial power system, the balance may involve the power company system and one or more in-plant generators or synchronous motors. Contingencies, such as load rejection, sudden loss of a generator or utility tie, starting of large engines or faults (and their duration), have a direct impact on system stability. Load-shedding schemes and critical fault-clearing times can be determined to select the proper settings for protective relays.

These types of studies are probably the single most complex ones done on a power system. A simulation will include synchronous generator models with their controls, i.e., voltage regulators, excitation systems, and governors. Motors are sometimes represented by their dynamic characteristics as are static var compensators and protective relays.

Contact Hours: 2 Hours - Technical

Instructor: Velimir Lackovic