Optimized Settings of Droop Parameters Using Stochastic Load Modeling for Effective DC Microgrids Operation

Cingoz, Fatih; Elrayyah, Ali; Sözer, Yilmaz

doi:10.1109/tia.2016.2633538

Cited by 52 publications

(20 citation statements)

References 41 publications

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“…The transfer functions given in (11) and (14) reflect the dynamic behavior of the DRs for the bus voltage stability and current sharing when the droop resistance changes. In the next, these transfer functions are used for the adaptive…”

Section: Modeling Of Mgmentioning

confidence: 99%

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Adaptive droop control for current sharing and bus voltage stability in DC microgrids

Tavakoli

Forouzanfar²

2021

Int Trans Electr Energ Syst

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Summary In order to achieve current sharing and bus voltage stability in distributed resources (DR) if a conventional drop control is used, a trade‐off must always be considered. When the bus voltage is restored to the nominal level, the desired current sharing is sacrificed. This paper proposes an adaptive and robust droop controller to achieve the goals of current sharing and bus voltage stability. This droop controller is a model reference adaptive control (MRAC) in which the second‐order reference transfer function is derived from the transfer function showing the dynamical behavior of DRs. In the proposed adaptive droop controller, the Lyapunov stability theory is used to extract the adaption law. The suggested adaptive droop controller is implemented in the secondary control layer and modifies the droop resistance adaptively. The effectiveness of the proposed method is validated by the experimental and simulation results.

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Section: Modeling Of Mgmentioning

confidence: 99%

“…The system dynamic is represented by the transfer function given in (11) and (14). To model the power converter, a second-order transfer function is used in this paper:…”

Section: Reference Model Blockmentioning

confidence: 99%

Adaptive droop control for current sharing and bus voltage stability in DC microgrids

Tavakoli

Forouzanfar²

2021

Int Trans Electr Energ Syst

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“…One of them is based on using communication between the sources. This approach could be very effective, however the need of communication between sources increases the costs and the system complexity [16], [17]. The other way does not require communication which ensures a higher level of reliability and flexibility [18], [19].…”

Section: Introductionmentioning

confidence: 99%

Haberleşme İçermeyen Mi̇kro Şebekeler İçi̇n Düşüm Kontrol Tabanli Orantisal Güç Paylaşim Yöntemi̇

Boynueğri¹

2020

Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi

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Although DC microgrids are getting popular, load sharing is still an unsolved obstacle for widespread operation. Conventional droop method which is one of the most preferred load sharing method partially manages load sharing however this is related to equal line resistance. Also extra voltage drop arise out of the droop method is another disadvantage of the system. In this study a new approach which achieves proportional load sharing without communication is proposed for DC Microgrids. This method presents a variable DC voltage level like rectified sinusoidal voltage instead of a constant DC Voltage. By this way a periodical signal is generated and frequency of this signal is controlled according to loading level like the AC droop control. A comparative simulation study with conventional droop control is done to verify the proposed method. Results show that proposed method increased the voltage performance of the system nearly %5, load sharing performance %17.10.

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“…However, the TGC was not minimized because the DG power was not optimally shared. Centralized controllers with various optimization algorithms were proposed to minimize the TGC [18][19][20][21]. These methods require a control center to manage the DG information in the microgrid to solve the economic dispatch problem via high bandwidth communication networks.…”

Section: Introductionmentioning

confidence: 99%

Economic Power Sharing to Minimize Generation Cost in a DC Microgrid

Hoang

Lee

2020

J. Electr. Eng. Technol.

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This study developed an economic power-sharing method to minimize the total generation cost (TGC) in a DC microgrid based on an AC signal injection technique. Economic power sharing for each distributed generator (DG) is achieved by means of a small AC frequency without a communication network. The AC frequency is proportional to the DG's incremental cost and is injected into the output voltage of the DG. The AC signal frequency is indirectly regulated to have economic power sharing with equivalent incremental cost for each DG, so the minimization of TGC is achieved instead of a straightforward optimization solution. Therefore, the control scheme is simple and easy to implement. The proposed power-sharing method overcomes the impact of differences in line resistance and is realized in a decentralized manner without a communication network and with plug-and-play capability. The proposed control method was investigated theoretically and verified experimentally.

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Optimized Settings of Droop Parameters Using Stochastic Load Modeling for Effective DC Microgrids Operation

Cited by 52 publications

References 41 publications

Adaptive droop control for current sharing and bus voltage stability in DC microgrids

Adaptive droop control for current sharing and bus voltage stability in DC microgrids

Haberleşme İçermeyen Mi̇kro Şebekeler İçi̇n Düşüm Kontrol Tabanli Orantisal Güç Paylaşim Yöntemi̇

Economic Power Sharing to Minimize Generation Cost in a DC Microgrid

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