The Stability Analysis of DC Micro-Grid System with PV Array

Pakdeeto, Jakkrit; Areerak, Kongpol

doi:10.1109/ieecon.2018.8712279

Cited by 3 publications

(1 citation statement)

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“…It is known that the CPL can degrade system stability [11,32,33]. Many research articles have described the methods for the unstable point prediction using a mathematical model [34][35][36]. However, the power converter model is usually time-varying because of the switching action.…”

Section: Modeling Of the Dcmgs Feeding An Ideal Cplmentioning

confidence: 99%

Stabilization of DC MicroGrid Systems Using the Loop-Cancellation Technique

Pakdeeto

Areerak

Bozhko

2021

IEEE J. Emerg. Sel. Topics Power Electron.

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DC micro-grid systems feed power to constant power loads via transmission lines. Although these systems are commonly used worldwide, constant power loads have negative impedance effects. These loads can significantly degrade the system stability. Therefore, stability study is very important to avoid inefficient operations. The model proposed in this paper can be derived by using a combination of the DQ method and the generalized state-space averaging method. This model is suitable for analyzing the system stability using the eigenvalue theorem. For stability analysis, the proposed DC micro-grid system will be unstable before reaching the rated power when the irradiance is equal to 0 W/m 2 . Consequently, the loop-cancellation technique is applied to mitigate the unstable operation until the operation at the rated power can be achieved. Experimental and simulation results were used to confirm the theoretical analysis. The system performed well, and the results proved that the system could be stabilized by using the proposed technique.

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