Brushless Excitation System 2G HTS Wind Turbine Generator Based on Topological Generator (Flux PUPM)

摘要

With an increase in unit capacity of wind turbines have increasingly high utilization of active materials. As a consequence, the growth capacity of excitatory systems outpaced the power turbines. This is accompanied by an increase in excitation current. In wind generators of 10 MW it could be ~ 2 kA. Achieved in superconducting topological generators (flux pump) high-current parameters, together with their main advantage - to form a closed superconducting circuit with the load, allowing for creation on their basis of effective systems for the excitation of superconducting high-power turbines. Topological generator (TPG) - is a fully superconducting electrical machine dc phase resistive superconducting switch. Its main purpose - power superconducting magnetic systems (SMS) in a short mode, in which SMS during the excitation and subsequent work is a closed-circuit superconductor. Technical possibility of brushless excitation system based on rotating and static exciters topological proved by the example of a synchronous generator capacity of 18 kW with Nb-Ti (LTS) and Y123 (HTS) coil excitation, cooled with LHe or LN. As shown by experimental studies, the use of superconducting topological generator enables us to exclude from excitation circuit of synchronous turbine power contact device or significantly limit the function of resistive current leads. Current leads are used only for emergency withdrawal of the electromagnetic energy of the excitation windings or for short-field forcing (if required by the terms of the power system).