Two dimensional finite-element simulation of a high temperature superconducting synchronous generator during three-phase short-circuit fault condition using full transient non-linear rotating machine model

This paper describes fault analysis of a 100kVA high temperature superconducting synchronous generator (HTSSG) using two dimensional (2-D) finite element modelling. The 100 kVA generator dimensions are based on the actual machine under construction in the Electrical Power Engineering Research Group at University of Southampton, United Kingdom. The non-linear transient modelling was simulated taking into account the relative movement between the stator and rotor. The high temperature superconducting field windings were analysed using external circuit equations as the equivalent supply voltage and resistance

Load characteristics analysis of a 100kVA synchronous generator with high temperature superconducting field winding using finite element modelling

In the development of a high temperature superconducting synchronous generator it is important to analyse the magnetic saturation o the machine so that its internal state during load operation prior to the disturbance is accurately predicted. Furthermore, the use of a superconducting field winding makes the machine more vulnerable to system instability. A modest increase in the field current may cause large loss densities in the winding, leading to thermal runaway. This would require the machine to be shut down while the winding temperature returned to normal, which would compromise the reliability of the machine. In this paper a method, employing finite element analysis, is established to calculate the saturated reactances of synchronous machines under steady state operation

Design and performance evaluations of a synchronous generator with high temperature superconducting field winding and magnetic core using finite element modelling

Following significant changes to our previous published design, this paper presents finite-element simulation results used to validate the updated design of a 100kVA synchronous generator with a high-temperature superconducting rotor winding. The machine is a 3-phase 2-pole 100-kVA 3000-rpm synchronous generator with a hybrid salient pole rotor (see Figure 1) which operates in a temperature range 73-77K. The generator is currently under construction at University of Southampton, United Kingdom and its design will be described