Modified Droop Control Strategy for Load Sharing and Circulating Current Minimization in Low-Voltage Standalone DC Microgrid

Sukhadiaa, Rakesh; Pandya, Saurabh N.

doi:10.1007/978-981-15-0226-2_5

Cited by 1 publication

(2 citation statements)

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“…Various modified droop control methods have been introduced in the existing literature to achieve precise current sharing and voltage regulation in paralleled converters of DC MGs (11)(12)(13)(14)(15)(16)(17)(18)(19). It is worth mentioning that modified droop methods are also popular in AC MGs as well (20).…”

Section: Introductionmentioning

confidence: 99%

“…The system's stability, dynamics, and plug-and-play capability were improved as well. Sukhadiaa and Saurabh (12) proposed a droop index for the parallel operation DC converters in low-voltage DC (LVDC) MGs. Their adaptive droop control scheme was based on a function of the normalized current sharing differences of DG units and the power losses, effectively minimizing the circulating current and the current sharing differences.…”

Section: Introductionmentioning

confidence: 99%

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A Distributed Cooperative Secondary Control Scheme for Obtaining Power and Voltage References of Distributed Generations in Islanded DC Microgrids

Nabian Dehaghani,

Biglarahmadi,

Mousazadeh Mousavi

et al. 2024

IJE

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Due to the widespread adoption of DC source-based distributed energy resources (DERs) and loads, alongside advancements in power electronics technology, DC microgrids (DC MGs) have recently gained significant attention. To effectively implement DC MGs, it is crucial to employ a suitable control strategy that maintains the bus voltage at the desired level and ensures appropriate power sharing among the integrated DERs. To address these objectives, a two-layer control scheme is proposed in this paper. In the primary layer, a customized droop control scheme is introduced, which applies lower voltage drop in comparison to the conventional droop strategies. Simultaneously, in the secondary layer, a modified voltage controller which is supplemented by a term to enhance power sharing in a distributed manner is employed,. The proposed control strategies are characterized by their simplicity and low communication infrastructure requirements. To assess the efficacy of the proposed control architecture, several case studies, including plug and play integration, load variations, and communication challenges, including link disconnection and noise effects, are conducted. Additionally, the performance of the proposed strategies is benchmarked against an architecture featuring conventional primary droop control and cooperative distributed secondary control approaches. The simulation studies conducted in MATLAB/SIMULINK software demonstrate that the proposed control methods outperform the alternative approaches, confirming their effectiveness in maintaining voltage regulation and power sharing objectives.

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