Ho Chi Minh City, Vietnam
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Van T.L.,Sai Gon University | Nguyen T.D.,Van Hien University | Tran T.T.,Ho Chi Minh City University of Technology | Nguyen H.D.,Ho Chi Minh City Electrical Power College
Advances in Electrical and Electronic Engineering | Year: 2015

This paper proposes a control scheme of back-to-back PWM converters for the permanent magnet synchronous generator (PMSG) wind turbine system. The DC-link voltage can be controlled at the machine-side converter (MSC), while the grid-side converter (GSC) controls the grid active power for a maximum power point tracking (MPPT). At the grid fault condition, the DC-link voltage controller is designed using a feedback linearization (FL) theory. For the MPPT, a proportional control loop is added to the torque control to reduce the influence of the inertia moment in the wind turbines, which can improve its dynamic performance. The validity of this control algorithm has been verified by the simulation of the 2-MW PMSG wind turbine system. © 2015.


Van T.L.,Ho Chi Minh City Electrical Power College | Nguyen B.P.N.T.,Ho Chi Minh City Electrical Power College | Truong T.H.,Ho Chi Minh City Electrical Power College | Trang T.T.,Vietnam National University, Ho Chi Minh City
Lecture Notes in Electrical Engineering | Year: 2014

In this paper, a pitch angle control scheme based on the fuzzy logic is proposed for the variable-speed wind turbine systems. The generator output power and rotor speed are used as control input variables for the fuzzy logic controller (FLC), which are effective to compensate for the nonlinear characteristic of the pitch angle to the wind speed. Also, a speed sensorless technique estimating the rotational speed is employed for the proposed control method. The effectiveness of the proposed method is verified by MATLAB simulation results for a 2-MW PMSG wind turbine system. © Springer-Verlag Berlin Heidelberg 2014.


Van T.L.,Electrical Basics | Truong T.H.,Ho Chi Minh City Electrical Power College | Nguyen B.P.N.T.,Ho Chi Minh City Electrical Power College | Trang T.T.,Vietnam National University, Ho Chi Minh City
Lecture Notes in Electrical Engineering | Year: 2014

This paper proposes a control scheme for the permanent magnet synchronous generator (PMSG) wind power system. The DC-link voltage can be controlled at the machine-side converter (MSC), while the grid-side converter (GSC) controls the grid active power for a maximum power point tracking (MPPT). At the grid fault condition, the DC-link voltage controller is designed using a feedback linearization (FL) theory. For the MPPT, it is also developed for the PMSG wind turbines to continuously generate the maximum electrical power without any sensor. The validity of this control algorithm has been verified by simulation 2-MW PMSG wind turbine system. © Springer-Verlag Berlin Heidelberg 2014.


Nguyen T.H.,Yeungnam University | Lee D.-C.,Yeungnam University | Van T.L.,Ho Chi Minh City Electrical Power College | Kang J.-H.,Hyosung Co.
Journal of Power Electronics | Year: 2013

This paper proposes a coordinated control of the reactive power between the STATCOMs (static synchronous compensators) and the grid-side converters (GSC) of wind farms equipped with PMSGs (permanent-magnet synchronous generators), by which the voltage fluctuations at the PCC (point of common coupling) are mitigated in the steady state. In addition, the level of voltage sags is reduced during grid faults. To do this, the GSC and the STATCOM supply reactive power to the grid coordinately, where the GSCs are fully utilized to provide the reactive power for the grid prior to the STATCOM operation. For this, the GSC capability of delivering active and reactive power under variable wind speed conditions is analyzed in detail. In addition, the PCC voltage regulation of the power systems integrated with large wind farms are analyzed for short-term and long-term operations. With this coordinated control scheme, the low power capacity of STATCOMs can be used to achieve the low-voltage ride-through (LVRT) capability of the wind farms during grid faults. The effectiveness of the proposed strategy has been verified by PSCAD/EMTDC simulation results.


Park J.-S.,Yeungnam University | Lee D.-C.,Yeungnam University | Van T.L.,Ho Chi Minh City Electrical Power College
2013 IEEE ECCE Asia Downunder - 5th IEEE Annual International Energy Conversion Congress and Exhibition, IEEE ECCE Asia 2013 | Year: 2013

In this paper, a frequency-locked loop (FLL) algorithm using the self-tuning gain is proposed for a precise phase angle detection from a second-order generalized integrator (SOGI) in a single-phase AC system. The integrator gain in the FLL is tuned by the fuzzy logic controller in which the frequency error and its variation are adopted as control input variables. In this method, the nonlinear characteristic of the frequency error to the variation of the central frequency is compensated by the self-tuning gain. With the proposed algorithm, the performance of the SOGI-FLL is much improved at the grid faults. The simulation and experimental results have verified the validity of the proposed method. © 2013 IEEE.

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