Oscillation instability of a DC microgrid caused by aggregation of same CPLs in parallel connection

Wei, Du; Zheng, Kaiyuan; Wang, Haifeng

doi:10.1049/iet-gtd.2018.6940

Cited by 13 publications

(12 citation statements)

References 12 publications

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“…Based on Equation (11), curves 1 and 2 in Figure 8, describe the steady state current-voltage characteristics of the CPLs and equivalent voltage source, respectively.…”

Section: The Steady-state Equilibrium Operating Point Of Ac-dc Microg...mentioning

confidence: 99%

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Large signal stability criterion of AC–DC hybrid microgrids with constant power loads considering reference current limitation

Liu

Song

et al. 2022

IET Generation Trans & Dist

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Islanded AC-DC hybrid microgrids composed of new energy sources, constant power loads and energy storage system are typical non-linear systems, and guaranteeing large signal stability is a key issue. In this paper, the non-linear model of islanded AC-DC hybrid microgrids is established, and large signal stability criteria are obtained. Considering reference current limitation of the energy DC-AC converter, the derived large signal stability criterion gives important constraints on the constant power loads power, the power of energy storage unit, DC bus voltage, the inductor and equivalent resistance of the AC filter, DC capacitor, the proportional parameter of the inner current controller and the maximum instantaneous power of the DC-AC converter. The paper is summarized as follows. Firstly, the equivalent model of the AC-DC hybrid microgrids in DQ rotating frame is established. Then based on mixed potential theory, the mixed potential model is constructed, and large signal stability criterion is derived and optimized considering the reference current limitation of the DC-AC converter. Finally, the presented criterion is verified by simulation and experimental results.

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“…Based on Equation (11), curves 1 and 2 in Figure 8, describe the steady state current-voltage characteristics of the CPLs and equivalent voltage source, respectively.…”

Section: The Steady-state Equilibrium Operating Point Of Ac-dc Microg...mentioning

confidence: 99%

“…According to Equation (11), the steady-state equilibrium point of AC-DC hybrid microgrids is obtained…”

Section: The Steady-state Equilibrium Operating Point Of Ac-dc Microg...mentioning

confidence: 99%

See 1 more Smart Citation

Large signal stability criterion of AC–DC hybrid microgrids with constant power loads considering reference current limitation

Liu

Song

et al. 2022

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

“…However, with the rapid growth of wind-power generators, photovoltaic (PV) arrays, and DC loads, increased amounts of fluctuating power disturb the balance between power generation and consumption. In addition, the constant power control of voltage source converters (VSCs) for load demand introduces negative impedances to the power grid [4,5]. These impedances might cause severe DC-voltage fluctuation and instability.…”

Section: Introductionmentioning

confidence: 99%

Optimised damping control of islanded DC power systems using state feedback

Yuan

Zhang

et al. 2020

IET Generation, Transmission & Distribution

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“…The modal analysis based on the state‐space model has been an effective method to assess the stability and for the controller design of a dynamic system [32, 33]. It has been applied in examining the stability of DC microgrid as affected by the CPL [10, 28, 29, 33, 34]. In the application, the state‐space model of entire DC microgrid with the integrated CPL was established.…”

Section: Introductionmentioning

confidence: 99%

Instability of a DC microgrid with constant power loads caused by modal proximity

Wei

Zheng

Wang

2019

IET Generation, Transmission & Distribution

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Oscillation instability of a DC microgrid caused by aggregation of same CPLs in parallel connection

Cited by 13 publications

References 12 publications

Large signal stability criterion of AC–DC hybrid microgrids with constant power loads considering reference current limitation

Large signal stability criterion of AC–DC hybrid microgrids with constant power loads considering reference current limitation

Optimised damping control of islanded DC power systems using state feedback

Instability of a DC microgrid with constant power loads caused by modal proximity

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