The cascade methods of doubly-fed induction machine for generator system

Abstract

This paper presents two solutions to cascade the doubly-fed induction machines in the power generator systems. The first solution is a traditional one with the power control circuit located on the stator-side. The second solution is a new one with the power control circuit located on the rotor-side. After analysis and evaluation, it is shown that the solution with the power control circuit located on the rotor side has advantages over the solution with the power control circuit located on the stator-side. Therefore, the authors chose the solution which is a power control circuit located on the rotor side to study, analyze in-depth and run the simulation. The results show that the proposed solution has a very good quality, the output voltage of the generator always follows the grid-voltage even when changing the gird-voltage or changing the speed of the generator.

Enhancing Wind Power Conversion System Control Under Wind Constraints Using Single Hidden Layer Neural Network

“…The process of using the CDFIG as a wind turbine generator involves several types of connections, one of them is by linking the initial stator directly to the grid, while the second stator is linked to the grid via an intermediate AC/AC converter which allows the energy to be controlled and transferred in both directions (6).…”

“…This innovative system combines two doubly fed induction generators (DFIGs) while preserving their original design (3, 4). It involves coupling two wound rotor induction generators at their rotor windings, both mounted on a shared shaft (3,5,6). Compared to traditional wind power systems, the CDFIG system offers several advantages, including enhanced reliability and reduced maintenance costs (7).…”

“…Compared to traditional wind power systems, the CDFIG system offers several advantages, including enhanced reliability and reduced maintenance costs (7). One key benefit of employing CDFIG system is its ability to operate at variable speeds (4,6). This is particularly valuable as it effectively stabilizes the generator voltage frequency when fluctuations occur in the rotor speed (6).…”

“…One key benefit of employing CDFIG system is its ability to operate at variable speeds (4,6). This is particularly valuable as it effectively stabilizes the generator voltage frequency when fluctuations occur in the rotor speed (6).…”