A Novel Design of PI Current Controller for PMSG-based Wind Turbine Considering Transient Performance Specifications and Control Saturation


This paper introduces a novel plan procedure of decoupled PI current controller for changeless magnet synchronous generator (PMSG)- based breeze turbines sustaining a lattice fixing inverter through consecutive converter. In particular, the plan procedure comprises of consolidating aggravation eyewitness based control (DOBC) with criticism linearization (FBL) system to guarantee ostensible transient execution recuperation under model vulnerability. By rearranging the DOBC under the input linearizing control, it is demonstrated that the composite controller decreases to a decoupled PI current controller in addition to an extra term that has the primary job of recuperating the ostensible transient execution of the criticism linearization, particularly under advance changes in the reference. Also, an enemy of windup compensator emerges normally into the controller while considering the control input immersion to plan the  DOBC. This licenses to expel the impact of the immersion squares required to constrain the control input. The proposed control plot is executed and approved through experimentation directed on 22-post, 5 kW PMSG. The outcomes uncovered that the proposed system can effectively accomplish ostensible execution recuperation under model vulnerability just as enhanced transient exhibitions under control immersion.



 Fig. 1. Configuration of a direct-drive PMSG-based WECS connected

to the host grid.



Fig. 2. System’s response under the composite controller consisting of the feedback controller (13) and the PI-DO (34)–(37). The controller was tested experimentally using the block diagram of Fig. 3. Specifically, the PI-DO (34)–(37) was evaluated with and without the consideration of the reference jump .

Fig. 3. System’s response under the composite controller consisting of the feedback controller (13) and the DOBC (25). The controller was tested experimentally using the block diagram depicted in Fig. 2.

Fig. 4. System’s response under a conventional PI current controller [17].

Fig. 5. Performance evaluation of the proposed PI-DO under model uncertainty.

Fig. 6. Experimental results: Performance testing of the proposed PI current controller under MPPT algorithm, with id (2 A/div), iq (4 A/div), ia (10 A/div), ws (5 [m/s]/div), iga (6 A/div), r (50 [rpm/min]/div), and time (400 ms/div)


This paper has introduced a novel structure of decoupled PI controller to upgrade the transient execution for the present control of PMSG-based breeze turbine. The proposed controller strategy was built up by consolidating a DOBC with criticism linearizing control law. For reasons unknown, the composite controller has a decoupled PI-like structure in addition to two extra parts. The initial segment is fundamentally an enemy of windup compensator, while the second part utilizes the reference bounce data to counteracts the impact of the sudden advance changes in the power request on the transient reaction. This change of the decoupled PI controller grants to ensure zero enduring state blunder without giving up the ostensible transient execution indicated by the state input controller. This remarkable element can’t be accomplished under the current decoupled PI controller, especially when the model parameters are not precise. Trial tests have been performed, and the outcomes bolster the utilization of the reference bounce data to enhance the transient execution under the decoupled PI controller. Along these lines, the proposed methodology furnishes professionals with a substitute strategy in structuring a vigorous decoupled PI current controller for PMSG-based breeze vitality change framework.

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