Analysis of Processes in the Boost DC-DC Converter with Sliding Mode Control

Erokhina, Ekaterina; Kiselev, Mikhail; Kryukov, Konstantin; Tserkovsky, Yuriy; Lepanov, Mikhail

doi:10.1109/reepe51337.2021.9388015

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…Therefore, the system's stability is examined by considering the eigenvalues and numerically computing bifurcation parameters. Consequently, the filter parameters and power loads should be considered, as they can impact system stability [107]. This information can be effectively used by system designers to ensure the stability of the actual system [108].…”

Section: Bifurcation Analysismentioning

confidence: 99%

Control Strategies and Stabilization Techniques for DC/DC Converters Application in DC MGs: Challenges, Opportunities, and Prospects—A Review

Nduwamungu,

Lie,

Lestas

et al. 2024

Energies

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DC microgrids (DC MGs) offer advantages such as efficiency, control, cost, reliability, and size compared to AC MGs. However, they often operate with numerous constant power loads (CPLs), exhibiting a negative incremental impedance characteristic that can lead to instability. This instability weakens stability boundaries and reduces system damping, especially when dealing with pulsed power loads (PPLs) on electric aircraft, ships, and cars. Linear controllers may not ensure stability across various operations, causing voltage dips and potential system instability. To secure DC/DC converter functionality and comply with impedance specifications, it is crucial to consider minor loop gain in control strategies and stabilization techniques. Employing diverse methods to decrease minor loop gain in DC/DC converters is essential. A comprehensive evaluation, including strengths, weaknesses, opportunities, and threats (SWOT) analysis, is conducted to assess control strategies, stabilization techniques, and stability standards for different DC/DC converters, identifying SWOT.

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Section: Bifurcation Analysismentioning

confidence: 99%

Control Strategies and Stabilization Techniques for DC/DC Converters Application in DC MGs: Challenges, Opportunities, and Prospects—A Review

Nduwamungu,

Lie,

Lestas

et al. 2024

Energies

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“…In this equation, x Ã 1 is the reference current of the boost DC-DC converter. Also, the sliding surface of ac variables is given by Equation (13).…”

Section: Mimo Smc Designmentioning

confidence: 99%

“…12 From controller design viewpoint, closed-loop control of the DC-DC boost converter is a challenging task due to non-minimum phase characteristics of the boost converters. To cope with this issue, the application of the cascaded controllers is reported for stabilization of the DC-DC boost converter using a different range of modern controllers, e.g., PI-Back Stepping, PI-Adaptive, PI-Fuzzy, 13 and Fuzzy-Back Stepping. 14 The main idea behind the cascade control of the boost converter is indirect requestion of the output voltage through current control of the converter's inductor.…”

Section: Introductionmentioning

confidence: 99%

A novel MIMO SMC for comprehensive unified control of the cascaded DC‐DC and DC‐AC converters in grid connected photovoltaic systems

Radmand,

Hosseini Firouz,

Salimi

et al. 2023

Circuit Theory & Apps

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SummaryIt is well known that DC‐DC boost converters are cascaded with DC‐AC inverters for grid connection of the photovoltaic (PV) systems. In the traditional control approaches, the mentioned DC‐DC and DC‐AC converters are controlled separately to facilitate the controller design problem. However, from the controller design viewpoint, the overall structure of the grid connected PV generator is a multi‐input multi‐output (MIMO) system. The duty cycle of the DC‐DC converter and inverter modulation index are the control inputs and, on the other hand, generated photovoltaic DC power and exported power to the grid are control outputs. Moreover, the inverter DC link voltage should be stabilized by the closed‐loop controller as well as an internal control output. If controllers are designed separately, it means that the interaction between DC‐DC and DC‐AC controllers isn't considered accurately, and since the isolated models of DC‐DC converter and DC‐AC inverter are extracted based on some approximated assumptions, separate controller design cannot guarantee stability and robustness of the whole system in a wide range of operation. To cope with these problems, in this paper, a novel MIMO sliding mode controller (SMC) is developed for comprehensive closed‐loop control of the DC‐DC boost converter cascaded with a single‐phase DC‐AC grid connected photovoltaic inverter. In the proposed approach, the dynamic model of whole system is developed comprehensively at first, and then, a unique MIMO controller is designed to control both DC‐to‐AC and DC‐to‐DC converters together. To cope with the nonlinear characteristic of the system and uncertainty of model parameters in a wide range, a fixed‐frequency SMC is developed using the comprehensive state space model of the closed loop system. In the proposed MIMO‐SMC controller, the AC power (which is exported to the grid) and operating point of the PV source are controlled via inverter modulation index and duty cycle of the DC‐DC boost converter, respectively. Another major advantage of the proposed system is mitigating the non‐minimum phase characteristic of the boost converter through the indirect control of inverter DC link capacitor. To evaluate the performance of the designed control system, simulation results are compared with a standard linear PI controller. It is shown that the developed system has zero steady‐state error and enjoys faster dynamic response during the start‐up and step changes of AC and DC current references. Moreover, it can maintain the stability of closed‐loop systems in a wide range of operations.

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Analysis of Processes in the Boost DC-DC Converter with Sliding Mode Control

Cited by 2 publications

References 9 publications

Control Strategies and Stabilization Techniques for DC/DC Converters Application in DC MGs: Challenges, Opportunities, and Prospects—A Review

Control Strategies and Stabilization Techniques for DC/DC Converters Application in DC MGs: Challenges, Opportunities, and Prospects—A Review

A novel MIMO SMC for comprehensive unified control of the cascaded DC‐DC and DC‐AC converters in grid connected photovoltaic systems

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