Summary

Recently, several adjustable speed pumped storage schemes have been realised by using double-fed asynchronous machines. However, a unique characteristic of the variable speed pump-turbine is that it requires a relatively small speed range compared to the general motor drive system. This requirement leads to special designs for rotor windings. The system mainly consists of an asynchronous generator-motor with three-phase distributed winding on its rotor surface and an AC Exciter system connected to the three phase rotor winding as power source supplying in-slip frequency required to adjust the unit speed keeping connection to the 50 Hz power system. The AC Exciter system consists of Injection Enhanced Gate Transistor (IEGT) Inverters, Chopper circuit, IEGT Converters and Excitation transformer.

Additional informations

Publication type Working Group Reports
Reference WGR_306_1
Publication year 2019
Publisher CIGRE
Study committees Power Generation and Electromechanical Energy Conversion (A1)
Working groups WG A1.34
File size 520 KB
Pages number 6
Price for non member 30 €
Price for member Free

Authors

VAN MEETEREN

Keywords

rotating electrical machines

Testing voltage of doubly-fed asynchronous generator-motor rotor windings for pumped storage system
Testing voltage of doubly-fed asynchronous generator-motor rotor windings for pumped storage system