Large-Signal Stabilization of a DC-Link Supplying a Constant Power Load Using a Virtual Capacitor: Impact on the Domain of Attraction

Magne, Pierre; Marx, D.; Nahid‐Mobarakeh, Babak; Pierfederici, Serge

doi:10.1109/tia.2012.2191250

Cited by 213 publications

(108 citation statements)

References 26 publications

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“…With large systems, the stability characteristics become more difficult to establish. To use the original, non-linear models of the system, SMC has been implemented in DC microgrids [15][16][17] by finding a sliding surface and using a discontinuous sliding mode controller to improve voltage stability. In a similar manner, a non-linear sliding surface is proposed by Singh and Fulwani, two researchers from the Indian Institute of Technology Jodhpur [18] to mitigate CPL instability.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Development of a Sliding Mode Controller for Constant Power Loads in Microgrids

et al. 2017

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Abstract:To implement renewable energy resources, microgrid systems have been adopted and developed into the technology of choice to assure mass electrification in the next decade. Microgrid systems have a number of advantages over conventional utility grid systems, however, they face severe instability issues due to the continually increasing constant power loads. To improve the stability of the entire system, the load side compensation technique is chosen because of its robustness and cost effectiveness. In this particular occasion, a sliding mode controller is developed for a microgrid system in the presence of constant power loads to assure a certain control objective of keeping the output voltage constant at 480 V. After that, a robustness analysis of the sliding mode controller against parametric uncertainties was performed and the sliding mode controller's robustness against parametric uncertainties, frequency variations, and additive white Gaussian noise (AWGN) are presented. Later, the performance of the proportional integral derivative (PID) and sliding mode controller are compared in the case of nonlinearity, parameter uncertainties, and noise rejection to justify the selection of the sliding mode controller over the PID controller. All the necessary calculations are reckoned mathematically and results are verified in a virtual platform such as MATLAB/Simulink with a positive outcome.

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Section: Introductionmentioning

confidence: 99%

Investigation on the Development of a Sliding Mode Controller for Constant Power Loads in Microgrids

et al. 2017

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“…For instance, a virtual-impedance technique was proposed by Lu et al in [23] to improve the stability of a DC microgrid. A virtual-capacitor was used for similar purposes by Zhong et al and Magne et al in [25,26], respectively. Other approaches employ virtual-capacitors for the integration of different types of ESSs on a DC microgrid [27].…”

Section: Introductionmentioning

confidence: 99%

Equivalence of Primary Control Strategies for AC and DC Microgrids

Unamuno

Barrena

2017

Energies

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Microgrid frequency and voltage regulation is a challenging task, as classical generators with rotational inertia are usually replaced by converter-interfaced systems that inherently do not provide any inertial response. The aim of this paper is to analyse and compare autonomous primary control techniques for alternating current (AC) and direct current (DC) microgrids that improve this transient behaviour. In this context, a virtual synchronous machine (VSM) technique is investigated for AC microgrids, and its behaviour for different values of emulated inertia and droop slopes is tested. Regarding DC microgrids, a virtual-impedance-based algorithm inspired by the operation concept of VSMs is proposed. The results demonstrate that the proposed strategy can be configured to have an analogous behaviour to VSM techniques by varying the control parameters of the integrated virtual-impedances. This means that the steady-state and transient behaviour of converters employing these strategies can be configured independently. As shown in the simulations, this is an interesting feature that could be, for instance, employed for the integration of different dynamic generation or storage systems, such as batteries or supercapacitors.

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“…With large systems, the stability characteristics become more difficult to establish. To use the original, non-linear models of the system, sliding mode control has been implemented in DC microgrids [15][16][17] by finding a sliding surface and using a discontinuous sliding mode controller to improve voltage stability. In like manner, a non-linear sliding surface is proposed by the two researchers from the Indian Institute of Technology Jodhpur, Suresh Singh and Deepak Fulwani at [18] to mitigate CPL instability.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Development of Sliding Mode Controller for Constant Power Loads in Microgrids

Hossain¹,

Perez²,

Padmanaban³

et al. 2017

Preprint

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Abstract:To implement renewable energy resources, microgrid systems have been adopted and developed into the technology of choice to assure mass electrification in the next decade. Microgrid systems have a number of advantages over the conventional utility grid systems, however, it faces severe instability issues due to continually increasing constant power loads. To improve the stability of the entire system, load side compensation technique is chosen because of its robustness and cost effectiveness. In this particular occasion, a sliding mode controller is developed for microgrid system in the presence of CPL to assure certain control objective of keeping the output voltage constant at 480V. After that, the robustness analysis of the sliding mode controller against parametric uncertainties is presented. The sliding mode controller robustness against parametric uncertainties, frequency variations, and additive white Gaussian noise (AWGN) are illustrated in this paper. Later, the performance of the PID and sliding Mode controller is compared in case of nonlinearity, parameter uncertainties, and noise rejection to justify the selection of Sliding Mode controller over PID controller. All the necessary calculations are reckoned mathematically and results are verified in the virtual platform such as MATLAB/Simulink with the appreciable outcome.

show abstract

Large-Signal Stabilization of a DC-Link Supplying a Constant Power Load Using a Virtual Capacitor: Impact on the Domain of Attraction

Cited by 213 publications

References 26 publications

Investigation on the Development of a Sliding Mode Controller for Constant Power Loads in Microgrids

Investigation on the Development of a Sliding Mode Controller for Constant Power Loads in Microgrids

Equivalence of Primary Control Strategies for AC and DC Microgrids

Investigation on Development of Sliding Mode Controller for Constant Power Loads in Microgrids

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