Civil Engineering Reference
In-Depth Information
more severe for a single-phase fault than a three-phase fault. The most
important quantity is the first peak current as it determines the rating of the
protective circuit breaker needed to protect the generator against such faults.
The short circuit current has a slowly decaying DC component, and an AC
component. The latter is larger than the direct on-line starting inrush current,
and may reach 10-15 times the full load rated current.
The transient current and torque, in any case, are calculated using the
generalized equivalent circuit of the machine in terms of the d-axis and q-axis
transient and subtransient reactance and time constants.
The q-axis terms
do not enter in the induction generator transient analysis, as the d-axis and
the q-axis terms are identical due to the perfect circular symmetry in the
electromagnetic structure.
4-6
References
1.
Rahim, Y. H. A. 1997. “Controlled Power Transfer from Wind Driven Reluctance
Generators,”
IEEE Winter Power Meeting, Paper No. PE-230-EC-1-09,
New York,
1997.
2.
Say, M. G. 1983. “Alternating Current Machines,” New York, John Wiley &
Sons, 1983.
3.
Alger, P. L. 1965. “The Nature of Induction Machines.” New York, Gordon and
Breach. 1965.
4.
Adkins, B. 1964. “The General Theory of Electrical Machines,” London, Chap-
man and Hall. 1964.
5.
Kron, G. 1967. “Equivalent Circuits of Electrical Machines,” New York, Dover
Publications, 1967.
6.
Yamayee, Z. A. and Bala, J. L. 1994. “Electromechanical Devices and Power
Systems,” New York, John Wiley & Sons, 1994.
