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Abstract
A new algorithm simulating the impact of asynchronous torque to the transient stability of multi-machine power system is mentioned and some typical numerical examples are presented in this article. Based on the proposed algorithm this PC program uses the elements of the eigen-image matrix to bring the specific advantages for the calculations of the transient stability of multi-machine power system.The symmetrical and unsymmetrical transient voltages of the VAR supporting devices such as the static var compensators, synchronous machines are simulated under condition of action of the automatic voltage regulation system and the transient frequencies relating to the action of the asynchronous torque are simulated for analyzing of the transient stability in multi-machine power system.
Highlights
Transient stability problems have been reported in power systems which originated broad studies in many literatures concerning [4],[5]
Excepting the test of behavior of the synchronous generators assuming the asynchronous operation, the most important is the problem of assessment of the transient stability in power system including the reclosing with asynchronism
The asynchronous speed of the synchronous machines may be engendered in a power system during swings caused by symmetrical or unsymmetrical faults, its effect may be taken into account to the analyzing of the transient stability
Summary
Transient stability problems have been reported in power systems which originated broad studies in many literatures concerning [4],[5]. The asynchronous regime is tested and allowable with small slip of speed of the synchronous machines operating in the power system. Excepting the test of behavior of the synchronous generators assuming the asynchronous operation, the most important is the problem of assessment of the transient stability in power system including the reclosing with asynchronism. The main features of the synchronous operation are as follows: The current circulating through the synchoronous machines and power network has components of two frequencies ω and ωo. There are three methods to assess the asynchronous parameters [3] such as the currents, powers, torques and emf. TasD is the asynchronous torque components relating to the d-axis damper windings. TasQ is the asynchronous torque components relating to the q-axis damper windings
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