Title :
Stability assessment of AC hybrid power systems for ‘more electric’ aircraft
Author :
Han, L. ; Wang, J. ; Griffo, A. ; Howe, D.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Sheffield, Sheffield
Abstract :
This paper analyses the small-signal stability of an AC hybrid power system for dasiamore-electricpsila aircraft. It consists of a synchronous variable frequency generator which supplies frequency insensitive AC loads, and high voltage DC (HVDC) loads via a 12-pulse transformer-rectifier unit. Various sub-system dynamics are derived and combined to form a complete system dynamic equation. The small-signal stability of the system under various operating conditions is assessed by evaluating eigenvalues of the Jacobian matrix of the linearised system. It has been shown that the system stability deteriorates as the power drawn by the motor drive load increases, and the load filter capacitance decreases.
Keywords :
Jacobian matrices; aircraft; aircraft power systems; electric vehicles; power system stability; synchronous generators; ´more-electric´ aircraft; 12-pulse transformer-rectifier unit; AC hybrid power systems; Jacobian matrix; high voltage DC loads; linearised system; load filter capacitance; motor drive load; stability assessment; synchronous variable frequency generator; system stability; AC generators; Aircraft; DC generators; Frequency; HVDC transmission; Hybrid power systems; Power system dynamics; Power system stability; Stability analysis; Synchronous generators; “more electric” aircraft; power system stability;
Conference_Titel :
Vehicle Power and Propulsion Conference, 2008. VPPC '08. IEEE
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-1848-0
Electronic_ISBN :
978-1-4244-1849-7
DOI :
10.1109/VPPC.2008.4677552
