Advanced control of direct-driven PMSG generator in wind turbine system

Abstract

Abstract:The paper presents the advanced control system of the wind energy conversion with a variable speed wind turbine. The considered system consists of a wind turbine with the permanent magnet synchronous generator (PMSG), machine side converter (MSC), grid side converter (GSC) and control circuits. The mathematical models of a wind turbine system, the PMSG generator and converters have been described. The control algorithms of the converter systems based on the methods of vector control have been applied. In the advanced control system of the machine side converter the optimal MPPT control method has been used. Additionally the pitch control scheme is included in order to achieve the limitation of maximum power and to prevent mechanical damage of the wind turbine. In the control system of the grid side converter the control of active and reactive power has been applied with the application of Voltage Oriented Control (VOC). The performance of the considered wind energy system has been studied by digital simulation. The results of simulation studies confirmed the good effectiveness of the considered wind turbine system and very good performance of the proposed methods of vector control and control systems.

Output power smoothing of grid‐connected permanent‐magnet synchronous generator driven directly by variable speed wind turbine: a review

“…MPPT is achieved by tracing the optimum rotational speed ( ω e _ ref ) calculated by the MPPT tracker as in (10) [30] The unity power factor is achieved by setting the reference value i s d_ ref to zero as shown in Fig. 6 [12, 30, 31].…”

Improved control strategy of DFIG-based wind turbines using direct torque and direct power control techniques

“…The other method uses space vector modulation (SVM). In the DTC-SVM, the torque ripple and flux ripple can be reduced with fixed frequency 52,[62][63][64] . In this work, the proposed DTC is based on space-vector pulse width modulation (SVPWM).…”

“…Reference * is provided from the PI regulator of the DC voltage controller block whereas reference * is set to zero to achieve a unity power factor. The instantaneous errors between the actual and estimated powers are controlled directly with hysteresis controllers and a lookup table like the one used in DTC 63 .…”

“…Both error signals are sent to two PI controllers. The output control signals from PI controllers determine the reference values *and * of the stator voltage vector components of RSC32,52,57,63,[75][76][77][78][79][80][81][82] .…”

Control of LVRT of PMSG in Back-to-Back Wind Energy Conversion System

“…The two inner control loops are designated for control of stator current vector components i sd , i sq . In the control system it is adopted, that the component i sd of the stator current vector is always maintained on the zero value [1,8]. The output signals from these controllers determine the reference components of stator voltage vector v sd * , v sq * .…”