A Study of Generator System Selection for Large Wind Turbine Generator System

Abstract

This paper focuses on selection of wind turbine generation systems that include generators, converters and gears. We study Fig. 1): permanent magnet generator (PMG) system, doubly-fed generator (DFG) system and synchronous generator (SYG) system in terms of the system efficiencies and running costs. Figure 2 shows flow chart for estimation of system efficiency. The system efficiencies are calculated with considering mechanical loss, iron loss, copper loss, and stray loss of three types generator systems. Figure 3 shows comparison of electric power generation per year. These results are calculated with considering relation between wind power and wind condition. According to these results, the 1-step gear PMG system is the best choice to large wind turbine system.

Magnetically geared wind generator technologies: Opportunities and challenges

“…Another comparative study of these wind turbine drive train topologies at 5 MW level has been reported in [11], which also shows that the total mass of the DD PMG is almost 50% of that of the DD EESG, while the PMG 1G is 10 times lighter than the DD EESG. The results from these two separate studies seem to correlate well.…”

“…The results from these two separate studies seem to correlate well. An interesting finding from [11] is that the PMG 1G tends to have a higher power generation capacity than that of the DFIG at a lower wind speed site. This implies that the PMG 1G is likely a better option for countries where average wind speeds are relatively low (e.g.…”