Sliding mode control of an isolated wound rotor synchronous generator

This paper presents a modelling study and focuses on an advanced higher order slip mode control strategy (Super Twisting Algorithm) for a variable speed wind turbine based on a permanent magnet synchronous generator to capture the maximum possible wind power from the turbine while simultaneously reducing the effect of mechanical stress, powered by a voltage inverter and controlled by vector PWM technique. This paper presents first and second order sliding mode control schemes. On the other hand, a challenging matter of pure SMC of order one can be summed up in the produced chattering phenomenon. In this work, this issue has been mitigated by implementing a new control. The proposed control, characterized by a precision in the case of a continuation of a significant reduction of the interference phenomenon, successfully addresses the problems of essential non-linearity of wind turbine systems. This type of control strategy presents more advanced performances such as behaviour without chattering (no additional mechanical stress), excellent convergence time, robustness in relation to external disturbances (faults in the network) and to non-modelled dynamics (generator and turbine) which have been widely used in power system applications by first order sliding mode control. In particular, second-order sliding regime control algorithms will be applied to the PMSG to ensure excellent dynamic performance. The suggested control is compared to the proportional-integral controller and sliding mode control of order one. The results of simulations under turbulent wind speed and parameter variations show the efficiency, robustness and significantly improved performance of the proposed control approach to distinguish and track quickly (about 10ms depending on the shading pattern) and at the same time saving the main priorities of the sliding mode of order one by reducing the existing chatter. The systems performances were tested and compared using Matlab/Simulink Software.

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Sliding mode control of boost rectifiers operating in discontinuous conduction mode for small wind power generators

Wind Engineering ◽

10.1177/0309524x211060551 ◽

2021 ◽

pp. 0309524X2110605

Author(s):

Mohamed Bendaoud

Keyword(s):

Sliding Mode Control ◽

Sliding Mode ◽

Harmonic Distortion ◽

Synchronous Generator ◽

Boost Converter ◽

Power Generators ◽

Mode Control ◽

Discontinuous Conduction Mode ◽

In Series ◽

Conduction Mode

This paper presents an approach to design the sliding mode control for an AC-DC converter, consisting of a diode rectifier in series with a boost converter. The results obtained show that this converter with the proposed control law can be used to control the extraction of mechanical power when connecting the permanent magnet synchronous generator (PMSG) to a wind turbine. The boost converter operates in discontinuous conduction mode (DCM) in order to reduce the total harmonic distortion (THD) of the currents in the PMSG. To verify the performance of the proposed method, a simulation study is performed.

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Synthesis of Synergetic Sliding Mode Control Law of Synchronous Generator Basing on Sequential Aggregate of Invariant Manifolds

2019 International Russian Automation Conference (RusAutoCon) ◽

10.1109/rusautocon.2019.8867666 ◽

2019 ◽

Cited By ~ 3

Author(s):

A.A. Kuz'menko

Keyword(s):

Sliding Mode Control ◽

Invariant Manifolds ◽

Sliding Mode ◽

Synchronous Generator ◽

Control Law ◽

Mode Control

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An auxiliary control aided modified sliding mode control for a PMSG based wind energy conversion system

World Journal of Engineering ◽

10.1108/wje-11-2018-0397 ◽

2019 ◽

Vol 16 (6) ◽

pp. 725-736

Author(s):

Shubhranshu Mohan Parida ◽

Pravat Kumar Rout ◽

Sanjeeb Kumar Kar

Keyword(s):

Sliding Mode Control ◽

Reactive Power ◽

Sliding Mode ◽

Synchronous Generator ◽

Superior Performance ◽

Control Technique ◽

Sliding Surface ◽

Content Type ◽

Wind Energy Conversion ◽

Mode Control

Purpose This study proposes a modified sliding mode control technique having a proportional plus integral (PI) sliding surface aided by auxiliary control applied to a wind turbine driven permanent magnet synchronous generator. This paper aims to realize real and reactive power control, keeping the voltage under the desired limit during transients. Design/methodology/approach First, a PI sliding surface type sliding mode control (PISMC) is formulated, which is capable of dragging the system to the desired state and stability. Then a saturation function-based auxiliary controller is incorporated with PISMC to enhance its performance during wind speed and system parameter variations. Findings The proposed controller can tackle the problems faced while using a PI controller and the conventional sliding mode controller (CSMC) such as lack of robustness and requirement of unnecessary large control signals to overcome the parametric uncertainties and problem of chattering. Originality/value To justify the superior performance of the proposed controller in terms of robustness, reliability and accuracy a comparative study is done with the CSMC and PI controllers. The simulations are performed using MATLAB.

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Variable Structure Sliding Mode Control and Direct Torque Control of Wind Power Generation System Based on the Pm Synchronous Generator

Journal of Electrical Engineering ◽

10.2478/jee-2015-0020 ◽

2015 ◽

Vol 66 (3) ◽

pp. 121-131 ◽

Cited By ~ 8

Author(s):

Youssef Errami ◽

Mohammed Ouassaid ◽

Mohamed Cherkaoui ◽

Mohamed Maaroufi

Keyword(s):

Sliding Mode Control ◽

Sliding Mode ◽

Direct Torque Control ◽

Variable Structure ◽

Synchronous Generator ◽

Torque Control ◽

Electrical Network ◽

Mode Control ◽

Dc Bus ◽

Grid Side

Abstract This paper presents a Variable Structure Sliding Mode Control (VS-SMC) scheme and Direct Torque Control (DTC) for Wind Farm (WF) based on the Permanent Magnet Synchronous Generator (PMSG). The WF consists of a 3 PMSGs which are connected to a common dc bus system with rectifier. The dc-bus is connected to the electrical network using only one inverter system, a grid-side filter as well as the transformer. The efficiency of the WF can be greatly improved using an appropriate control approach. So, the control strategy uses the technique of DTC to regulate the speeds of PMSGs for Maximum Power Point Tracking (MPPT) mode. Besides, by employing VS-SMC the grid-side inverter is controlled to inject the generated power into the electrical network, to regulate DC-link voltage and to achieve Unity Power Factor. The used control strategies provide an optimal control solution for WF systems based on the PMSG.

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