This project was to study the power flow generated by the wind turbine at variable speed to the grid via a power electronics interface type NPC three levels. To do this, we firstly should model each subsystem constituting the system studied for control purposes. This system is modeled using Kirchhoff's laws and Park transformation to obtain two non-linear models in dqo synchronous reference frame, which reflects the dynamics of each subsystem. It is important to note that the modeling subsystem 2 has led to propose an improved state model in dq0 synchronous reference frame relative to one proposed in literature for the same system, and secondly we have applied the input output linearization control technique to control each parameter given below:
• speed regulation of the machine in order to extract the maximum output power;
• grid harmonics cancelation;
• reactive power compensation;
• compensation of unbalanced load.
Finally, for validation, the complete system is implemented with each nonlinear control applied to both subsystem 1 and 2, the simulation results show good performances for steady state and dynamic operations. Indeed, the grid current is sinusoidal and in phase with the grid voltage and the neutral current is forced to zero despite the presence of unbalanced non-linear load. In addition, using three-level NPC converter function is acting as non-polluting converter.
| Date | 20 Feb 2014 |
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| Original language | French |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | Kamal Al-Haddad (Supervisor) & Abdelhamid Hamadi (Co-supervisor) |
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Missanda Mavoungou, A. (Author),
Al-Haddad (Supervisor) & Hamadi (Co-supervisor),
20 Feb 2014Student thesis: Master's thesis › Master in Engineering: Electrical Engineering