Sliding-Mode Control of a Charger/Discharger DC/DC Converter for DC-Bus Regulation in Renewable Power Systems

Serna-Garcés, Sergio I.; Montoya, Daniel; Ramos‐Paja, Carlos Andrés

doi:10.3390/en9040245

Cited by 43 publications

(63 citation statements)

References 87 publications

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“…To show the effect of chattering produced, the sliding surface of a source is simulated and shown in Figure 21. Figure 21(a) shows the produced chattering which is controlled using a hysteresis band as defined in (37). The value of is selected as 100 based on the criteria reported in [51].…”

Section: Fail-safe Performance Of Distributed Control Architecturementioning

confidence: 99%

“…These controllers require a linearized model of the system, which makes it difficult for them to show good power sharing performance and stability in all operating conditions [33][34][35]. So, an SM controller is alternatively proposed in [36][37][38][39][40]43] which ensures stability in all operating conditions. Hence, in this paper, an SM controller technique is proposed for proportional load sharing and stability of DC microgrids.…”

Section: Sliding Mode Controlmentioning

confidence: 99%

“…SMC for microgrid type systems is reported in [9,[36][37][38][39][40]. SM is a controller which is used for variable structure systems [36].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Proportional Load Sharing and Stability of DC Microgrid with Distributed Architecture Using SM Controller

Rashad

Raoof

Ashraf

et al. 2018

Mathematical Problems in Engineering

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DC microgrids look attractive in distribution systems due to their high reliability, high efficiency, and easy integration with renewable energy sources. The key objectives of the DC microgrid include proportional load sharing and precise voltage regulation. Droop controllers are based on decentralized control architectures which are not effective in achieving these objectives simultaneously due to the voltage error and load power variation. A centralized controller can achieve these objectives using a high speed communication link. However, it loses reliability due to the single point failure. Additionally, these controllers are realized through proportional integral (PI) controllers which cannot ensure load sharing and stability in all operating conditions. To address limitations, a distributed architecture using sliding mode (SM) controller utilizing low bandwidth communication is proposed for DC microgrids in this paper. The main advantages are high reliability, load power sharing, and precise voltage regulation. Further, the SM controller shows high robustness, fast dynamic response, and good stability for large load variations. To analyze the stability and dynamic performance, a system model is developed and its transversality, reachability, and equivalent control conditions are verified. Furthermore, the dynamic behavior of the modeled system is investigated for underdamped and critically damped responses. Detailed simulations are carried out to show the effectiveness of the proposed controller.

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Section: Fail-safe Performance Of Distributed Control Architecturementioning

confidence: 99%

Section: Sliding Mode Controlmentioning

confidence: 99%

See 1 more Smart Citation

Proportional Load Sharing and Stability of DC Microgrid with Distributed Architecture Using SM Controller

Rashad

Raoof

Ashraf

et al. 2018

Mathematical Problems in Engineering

View full text Add to dashboard Cite

show abstract

“…This experiment proved that the control further improved the convergence rate and tracking precision of the closed-loop clutch system. In [15], the use of a single sliding mode controller (SMC) successfully generated a stable DC bus voltage for the charger/discharger DC/DC converter in any operation condition. It offered the necessary conditions for energy storage devices.…”

Section: Introductionmentioning

confidence: 99%

Sliding Mode Variable Structure Control of a Bearingless Induction Motor Based on a Novel Reaching Law

et al. 2016

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Abstract:In order to improve the performance of the Bearingless Induction Motor (BIM) under large disturbances (such as parameter variations and load disturbances), an adaptive variable-rated sliding mode controller (ASMC) is designed to obtain better performance of the speed regulation system. Firstly, the L 1 norm of state variables is applied to the conventional exponential reaching law and an adaptive variable-rated exponential reaching law is proposed to reduce system chattering and improve bad convergence performance of the sliding mode variable structure. Secondly, an integral sliding-mode hyper plane is produced according to the speed error in speed regulation system of BIM. Current signal is extracted by the combination of the sliding-mode hyper plane, the electromagnetic torque and the equation of motion. Finally, the feedback speed can adjust operating state adaptively according to speed error and make system chattering-free moving. The simulation and experiment results show that the proposed ASMC can not only enhance the robustness of the system's uncertainties, but also improve the dynamic performance and suppress system chattering.

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“…These circuits suffer the disadvantage of low efficiency under heavy load condition due to hard-switching. In [27], sliding mode control is proposed to improve the performance of bidirectional DC-DC converters, the soft switching issue is not addressed since the proposed system utilizes conventional cascade buck/boost structure. In [28], a novel ZVS control technique based on discontinuous conduction mode is proposed.…”

Section: Introductionmentioning

confidence: 99%

Analysis and Controller Design of a Universal Bidirectional DC-DC Converter

Liu

et al. 2016

Energies

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Abstract:In this paper, first the operating principles of a non-isolated universal bidirectional DC-DC converter are studied and analyzed. The presented power converter is capable of operating in all power transferring directions in buck/boost modes. Zero voltage switching can be achieved for all the power switches through proper modulation strategy design, therefore, the presented converter can achieve high efficiency. To further improve the efficiency, the relationship between the phase-shift angle and the overall system efficiency is analyzed in detail, an adaptive phase-shift (APS) control method which determines the phase-shift value between gating signals according to the load level is then proposed. As the modulation strategy is a software-based solution, there is no requirement for additional circuits, therefore, it can be implemented easily and instability and noise susceptibility problems can be reduced. To validate the correctness and the effectiveness of the proposed method, a 300 W prototyping circuit is implemented and tested. A low cost dsPIC33FJ16GS502 digital signal controller is adopted in this paper to realize the power flow control, DC-bus voltage regulation and APS control. According to the experimental results, a 12.2% efficiency improvement at light load and 4.0% efficiency improvement at half load can be achieved.

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Sliding-Mode Control of a Charger/Discharger DC/DC Converter for DC-Bus Regulation in Renewable Power Systems

Cited by 43 publications

References 87 publications

Proportional Load Sharing and Stability of DC Microgrid with Distributed Architecture Using SM Controller

Proportional Load Sharing and Stability of DC Microgrid with Distributed Architecture Using SM Controller

Sliding Mode Variable Structure Control of a Bearingless Induction Motor Based on a Novel Reaching Law

Analysis and Controller Design of a Universal Bidirectional DC-DC Converter

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