A Novel MPPT Method Based on the Synthesis of Quasi-Sliding Mode Control and Dynamic Equivalent Impedance Matching Method

A systematic procedure to synthesize dynamic equivalent impedance matching method (EIM) based on the quasi-sliding mode control (QSMC) is presented. Aiming at the existing maximum power point tracking (MPPT) methods’ limitation on the dynamic response, control accuracy and robustness, in this paper, with a boost converter used, QSMC is introduced on the basis of EIM and the synthesis (EIM&QSMC) which not only improves the tracking speed and accuracy, but also further enhances the robustness. The simulation results show that compared with EIM, on the condition of load impedance and illumination change, the synthesis improves the MPPT system on the ability to adapt the circuit parameter variation, which has better control effect and practical significance. The design and the models are validated by Matlab / Simulink simulations.

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Analysis of Sliding-Mode Controlled Impedance Matching Circuits for Inductive Harvesting Devices

Energies ◽

10.3390/en12203858 ◽

2019 ◽

Vol 12 (20) ◽

pp. 3858

Author(s):

Juan A. Garriga-Castillo ◽

Hugo Valderrama-Blavi ◽

José A. Barrado-Rodrigo ◽

Àngel Cid-Pastor

Keyword(s):

Sliding Mode Control ◽

Sliding Mode ◽

Electric Pulse ◽

Hybrid Cell ◽

Impedance Matching ◽

Input Voltage ◽

Sea Waves ◽

Control Laws ◽

Mode Control ◽

Voltage Variation

A sea-wave energy harvesting, articulated device is presented in this work. This hand-made, wooden device is made combining the coil windings of an array of three single transducers. Taking advantage of the sea waves sway, a linear oscillating motion is produced in each transducer generating an electric pulse. Magnetic fundamentals are used to deduce the electrical model of a single transducer, a solenoid-magnet device, and after the model of the whole harvesting array. The energy obtained is stored in a battery and is used to supply a stand-alone system pay-load, for instance a telecom relay or weather station. To maximize the harvested energy, an impedance matching circuit between the generator array and the system battery is required. Two dc-to-dc converters, a buck-boost hybrid cell and a Sepic converter are proposed as impedance adaptors. To achieve this purpose, sliding mode control laws are introduced to impose a loss free resistor behavior to the converters. Although some converters operating at discontinuous conduction mode, like the buck-boost converter, can exhibit also this loss free resistor behavior, they usually require a small input voltage variation range. By means of sliding mode control the loss free resistor behavior can be assured for any range of input voltage variation. After the theoretical analysis, several simulation and experimental results to compare both converters performance are given.

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SLIDING MODE DESIGN OF CONTROL AND MODULATOR ELECTRONICS FOR POWER CONVERTERS

Journal of Circuits System and Computers ◽

10.1142/s0218126695000229 ◽

1995 ◽

Vol 05 (03) ◽

pp. 355-371 ◽

Cited By ~ 34

Author(s):

J. FERNANDO SILVA

Keyword(s):

Steady State ◽

Sliding Mode Control ◽

Power Converters ◽

Sliding Mode ◽

Power Converter ◽

Operating Conditions ◽

Switching Frequency ◽

Circuit Parameter ◽

Mode Control ◽

State Error

This paper presents state-of-the-art application of Sliding Mode Control theory, to improve the performance and to integrate the modulator and control electronics design of power converters. This approach eliminates conventional PWM modulators and loop linear PI regulators, reducing the converter complexity, weight and volume, which increases its power density figure. Sliding Mode Control techniques are used to obtain, from the controllability canonical system model, the control law, a linear combination of state variable errors and its derivatives, whose implementation is a simple circuit, that directly generates the drive pulses for the semiconductors. The commutation strategy implements a power converter with better performances than conventional PWM controlled ones, faster response and robustness concerning circuit parameter variations and operating conditions. This non linear control approach provides zero steady-state error and, by the subtle use of limiters, short circuit ouput current limitation. Using a simple 3 level clock, it is also shown how to obtain a sliding mode controller with constant switching frequency and zero steady-state error.

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Impedance Matching in Photovoltaic Systems Using Cascaded Boost Converters and Sliding-Mode Control

IEEE Transactions on Power Electronics ◽

10.1109/tpel.2014.2339134 ◽

2015 ◽

Vol 30 (6) ◽

pp. 3185-3199 ◽

Cited By ~ 74

Author(s):

Reham Haroun ◽

Abdelali El Aroudi ◽

Angel Cid-Pastor ◽

Germain Garcia ◽

Carlos Olalla ◽

...

Keyword(s):

Sliding Mode Control ◽

Sliding Mode ◽

Impedance Matching ◽

Photovoltaic Systems ◽

Boost Converters ◽

Mode Control

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Performance analysis of boost converter with cascaded inner loop fuzzy SMC

Circuit World ◽

10.1108/cw-04-2020-0052 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Rekha Yoganathan ◽

Jamuna Venkatesan ◽

William Christopher I.

Keyword(s):

Sliding Mode Control ◽

Sliding Mode ◽

Research Work ◽

Current Loop ◽

Circuit Parameter ◽

Content Type ◽

Mode Control ◽

Speed Up ◽

Fuzzy Sliding Mode ◽

Proportional Integral Controller

Purpose This paper intent to design, develop, and fabricate a robust cascaded controller based on the dual loop concept i.e. Fuzzy Sliding Mode concept in the inner loop and traditional Proportional Integral controller in the outer loop to reduce the unknown dynamics and disturbances that occur in the DC-DC Converter. Design/methodology/approach The proposed Fuzzy sliding mode approach combines the merits of both SMC and Fuzzy logic control. FSMC approach reduces the chattering phenomena that commonly occurs in the sliding mode control and speed up the response of the controller. Findings In most of the research work, the inner current loop of cascaded controller was designed by sliding mode control. In this paper FSMC is proposed and its efficacy is confirmed with SMC -PI. In most uncertainties, FSMC-PI produces null maximum peak overshoot and a very less settling time of 0.0005 sec. Originality/value The presence of Fuzzy SMC in the inner loop ensure satisfactory response against all uncertainties such as steady state, circuit parameter variations and sudden line and load disturbances.

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