Comparative Ranking of Critical Uncertainties Affecting the Stability of Mixed AC/DC System

Mochamad, Rian Fatah; Hasan, Kazi N.; Preece, Robin

doi:10.23919/pscc.2018.8442708

Cited by 2 publications

(3 citation statements)

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“…The semi-global Morris method generates a multi-dimensional trajectory in search space [18,19]. To generate the search space, the base value (initial) is randomly selected for each uncertainty (∆ to 1 − ∆).…”

Section: Sensitivity Analysismentioning

confidence: 99%

“…This is effectively a random walk in the search space where the dimension of work depends on the number of uncertainties and is limited by the steps. The elementary effect of a ∆ change can be defined as in (15) [19].…”

Section: Sensitivity Analysismentioning

confidence: 99%

“…Therefore, estimating the essential parameters under various operating conditions would enable secure and reliable operation with targeted control action and monitoring requirements. Several sensitivity analysis (SA) methods are applied in the literature for AC power system application, i.e., load classification, ranking of the generator, and ranking the critical load in terms of the voltage and frequency stability [18,19]. However, no reported work has considered the SA method for critical parameter identification in the DC system.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Oscillation and Resonance in the Renewable Integrated DC-Microgrid

et al. 2023

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This paper assessed the small-signal stability performance of a multi-converter-based direct current microgrid (DCMG). The oscillation and potential interactions between critical modes are evaluated. First, the complete analytical model of the DCMG is developed with the converter and associated controllers. Three methodologies, impedance scanning, eigenvalue analysis, and time-domain simulation, along with the fast Fourier transform (FFT) analysis, have been used to comprehensively investigate the oscillations and interactions. The simulation results show inherent weak modes, with a wide range of oscillations in the studied DCMG, which may destabilize the system under disturbances. Based on the sensitivity analysis, controller gains and DC-link capacitance are identified as the most critical parameters and substantially influence the weak modes leading to oscillations, interactions, and resonance. Finally, the performance of the various control synthesis methods is compared. This examination would help the researchers, planning, and design engineers to design and stably operate a multi converter-based DC microgrid.

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Section: Sensitivity Analysismentioning

confidence: 99%

Section: Sensitivity Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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