A discrete state-space controller for superconducting turbogenerators

Alyan, M.A.A.S.; Rahim, Y.H.A.

doi:10.1109/60.4734

Cited by 3 publications

(1 citation statement)

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“…One way of overcoming this problem is to develop SCGs. This machine offers a lot of advantages over the conventional synchronous machines and has the capability to supply greater base load with higher efficiency [1,2]. However, SCGs have a complex structure and require materials different fiom those normally used in conventional generators.…”

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confidence: 99%

An Ann Based Pi Controller for a Superconducting Generator

Morsy

Mohammed

2001

ERJ. Engineering Research Journal

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The paper presents a coordinated artificial neural network (ANN) based proportional plus-integral (PI) controller for a superconducting generator (SCG). The ANN controller was trained using data groups, that covers the whole P-Q plane. These data groups obtained from a PI controller implemented on the governor control loop. To test the present control strategy, a fairly detailed nonlinear model of the SCG is used to assure accuracy and validity of the proposed control structure. The simulation results are presented in comparison with similar results which obtained using the conventional PI controller. The simulation results reveal that the ANN control design approach can be implemented to design controllers for the SCG and give results similar to those of conventional controllers.The natural growth of population renders continuous increase in electric power demand. One way of overcoming this problem is to develop SCGs. This machine offers a lot of advantages over the conventional synchronous machines and has the capability to supply greater base load with higher efficiency [1,2]. However, SCGs have a complex structure and require materials different fiom those normally used in conventional generators. This is due to that the high current density of the superconducting field winding obviates the need for any magnetic circuit in the SCG. For this reason all armature windings contemplated for SCG are of the air cored winding type. Also, the rotor incorporates in addition to the super-conducting field winding, a helium management system and two eddy-current screens [3,4]. The outer screen acts as a damper has time constant suitable for the damping purpose and the inner screen acts as an electromagnetic shield has a time constant sufficiently long to shield the field winding fiom time changing magnetic fields [5].

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confidence: 99%