Providing Ancillary Services with Wind Turbine Generators Based on DFIG with a Two-Branch Static Converter

Abstract

This work aims to analyze and validate through mathematical modeling and experimental results, in a three-phase three-wire electrical system, the technical viability of a static power converter with a two-level topology with only two controlled branches (2L2B), operating as a grid-side converter (GSC) in a wind turbine generator based on a doubly fed induction generator (DFIG). With this reduced-switches topology, the GSC is able to regulate the DC-link voltage level from the generator back-to-back converter and provide ancillary services of harmonic filtering and reactive power compensation from linear/nonlinear loads connected to the point of common coupling. An 8-kVA experimental prototype was implemented in the laboratory to validate the proposal. The prototype control system was realized using the dSPACE DS1103 PPC Controller Board platform programmed via MATLAB/Simulink. The effectiveness of the proposed system is verified by comparing the results obtained with the 2L2B topology to the ones with the usual two-level three-branch topology.

Real-Time Simulation of Power Conversion in Doubly Fed Induction Machine

“…With the introduction of an additional algorithm with rotor angle prediction, a significant quantitative improvement of results is obtained, and the maximum difference between the base waveforms and those obtained from computer simulation does not exceed 10%. The applications of ring rotor induction machine (RRIM) as a doubly fed induction machine (DFIM) are numerous [32][33][34][35][36][37]. There are many problems that are still being solved.…”

“…Similar needs also appear, e.g., in article [33], where there is a connection between DFIM and a control system using artificial intelligence. It is therefore advisable to develop a tool, e.g., a real-time simulator with an adequate mathematical model, which can be used to simulate the The applications of ring rotor induction machine (RRIM) as a doubly fed induction machine (DFIM) are numerous [32][33][34][35][36][37]. There are many problems that are still being solved.…”

“…In these solutions, the real-time simulator is connected to the real controller system. This type of simulator can also be used to verify algorithms for controlling wind turbines connected to the power distribution network [34][35][36]. The network operator sets certain requirements [34] that must be met by all network users.…”