Optimized sliding mode current controller for power converters with non-minimum phase nature

Goudarzian, Alireza; Khosravi, Adel; Raeisi, Heidar Ali

doi:10.1016/j.jfranklin.2019.08.026

Cited by 18 publications

(13 citation statements)

References 45 publications

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“…In SMC parlance, this zone is denoted as a sliding surface. Considering the buck converter state-space model presented earlier, the sliding surface is defined as in Equation ( 15) [30].…”

Section: Sliding Mode Controller Design For Output Voltage Regulationmentioning

confidence: 99%

Sliding Mode Control based MPPT and Output Voltage Regulation of a Two-stage Stand-alone PV System

Manuel

Inanc

2022

Preprint

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When it comes to reducing emissions caused by the generation of electricity through conventional sources, among different renewable energies, the solar gains prominence, due to its geographical availability, simplicity of implementation and absence of moving parts. However, the performance of photovoltaic systems is dependent on environmental conditions. Depending on temperature and solar irradiation, the PV system has an operating point where maximum power can be generated. The techniques that are implemented to find this operating point are the so-called maximum power point tracking (MPPT) algorithms. Since weather conditions are variable in nature, the output voltage of the PV system needs to be regulated to remain equal to the reference. Most of the existing studies focus either on MPPT or on voltage regulation of the PV system. In this paper, the two-stage PV system is implemented so that both MPPT and voltage regulation are achieved simultaneously. Additionally, an improved version of the Perturb and Observe (P&O) algorithm based on artificial potential fields (APF), called APF-P&O, is proposed. Sliding Mode Controllers with appropriate control laws are designed for both stages of conversion. Simulations performed in MATLAB/Simulink software prove the superiority of the proposed APF-P&O method over the conventional P&O method in terms of convergence time, output power ripples and sensitivity to step sizes. At the same time, the voltage regulation issue is also solved, where the output voltage is fixed to the value of 32 V, regardless of variations in solar irradiation.

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“…In SMC parlance, this zone is denoted as a sliding surface. Considering the buck converter state-space model presented earlier, the sliding surface is defined as in Equation ( 15) [30].…”

Section: Sliding Mode Controller Design For Output Voltage Regulationmentioning

confidence: 99%

Sliding Mode Control based MPPT and Output Voltage Regulation of a Two-stage Stand-alone PV System

Manuel

Inanc

2022

Preprint

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“…A good solution is use of a minimum phase converter instead of the converters with non‐minimum phase nature. Figure 9A,B show the simulation results of the output voltage and inductor current of the proposed converter, conventional boost converter, quadratic boost converter, 7 tri‐state boost converter reported in Reference 31 and magnetically coupled boost converter with output filter 44 during transient region for the aforementioned nominal operating point. As can be seen, the dynamic response of the proposed converter is much faster with a smaller overshoot compared with other converters.…”

Section: Simulationsmentioning

confidence: 99%

“…It makes the controller design too difficult. (b) For the closed loop stability of these converters a PID controller with a high phase margin is required 31,32 . It increases the closed loop system sensitivity and causes the oscillatory behavior of the output voltage during transient region.…”

Section: Introductionmentioning

confidence: 99%

Modeling and implementation of a new boost converter with elimination of right‐half ‐plan zero

Goudarzian

Khosravi

Raeisi

2020

Int Trans Electr Energ Syst

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Summary Conventional boost converters used for fuel‐cell applications suffer from a slow dynamic response, due to their non‐minimum phase nature. It is the main challengeable problem in the development of boost topologies working in continuous‐conduction mode (CCM). In order to eliminate the mentioned disadvantage, a boost converter is proposed in this article which is capable to give a high voltage gain. From viewpoint of the boosting feature, the proposed topology is more appropriate to connect a low input voltage to a higher dc voltage of load. Moreover, the duty‐cycle‐to‐output‐voltage transfer function of this converter is free from the right‐half‐plane zero (RHPZ) and therefore, its dynamics are simpler and faster compared with the classical boost converter. To cancel the RHPZ, improve the dynamic behavior and enhance the voltage transfer gain, a separate forward path is provided using a transformer and an additional capacitor in the output node for transferring the input energy to the output load during the switch‐on time interval of the power switch. For derivation of the converter model, the steady state analysis is given in details and the required equations are formulated. The transfer function expression is obtained using the averaging model of the converter and then, the description and comparisons are introduced to reveal the features and superiority of the proposed converter. Also, a laboratory set‐up of the suggested dc/dc boost converter working in CCM is built and tested.

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“…For more details on the implementation issues, please see references [20][21][22][23]. Remark: The proposed control strategy offers an alternative to some other sliding mode controllers designs considering adaptive pulse width modulation [24], sub-optimal regulation [25], and multitype restrictive [26] approaches which have been applied on DC-DC power converters to obtain arbitrary signals. However, not one of them has been tested on the AC-DC device.…”

Section: Sliding Mode Current-tracking Controlmentioning

confidence: 99%

Design of a Continuous Signal Generator Based on Sliding Mode Control of Three-Phase AC-DC Power Converters

2019

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In recent years, hundreds of technical papers have been published which describe the use of sliding mode control (SMC) techniques for power electronic equipment and electrical drives. SMC with discontinuous control actions has the potential to circumvent parameter variation effects with low implementation complexity. The problem of controlling time-varying DC loads has been studied in literature if three-phase input voltage sources are available. The conventional approach implies the design of a three-phase AC/DC converter with a constant output voltage. Then, an additional DC/DC converter is utilized as an additional stage in the output of the converter to generate the required voltage for the load. A controllable AC/DC converter is always used to have a high quality of the consumed power. The aim of this study is to design a controlled continuous signal generator based on the sliding mode control of a three-phase AC-DC power converter, which yields the production of continuous variations of the output DC voltage. A sliding mode current tracking system is designed with reference phase currents proportional to the source voltage. The proportionality time-varying gain is selected such that the output voltage is equal to the desired time function. The proposed new topology also offers the capability to get rid of the additional DC/DC power converter and produces the desired time-varying control function in the output of AC/DC power converter. The effectiveness of the proposed control design is demonstrated through a wide range of MATLAB/Simulink simulations.

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Optimized sliding mode current controller for power converters with non-minimum phase nature

Cited by 18 publications

References 45 publications

Sliding Mode Control based MPPT and Output Voltage Regulation of a Two-stage Stand-alone PV System

Sliding Mode Control based MPPT and Output Voltage Regulation of a Two-stage Stand-alone PV System

Modeling and implementation of a new boost converter with elimination of right‐half ‐plan zero

Design of a Continuous Signal Generator Based on Sliding Mode Control of Three-Phase AC-DC Power Converters

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