Comparative analysis and study of the dynamic stability of AC/DC systems

Gaba, G.; Lefebvre, S.; Mukhedkar, D.

doi:10.1109/59.14550

Cited by 38 publications

(30 citation statements)

References 1 publication

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“…To address the high computational demand for deriving the state-space model, the Component Connection Method (CCM) was reported for converter-based power grids in [69]. The CCM presents a computationally efficient procedure for deriving the LTI state-space model given in (19).…”

Section: A Eigenvalue Analysismentioning

confidence: 99%

Harmonic Stability in Power Electronic-Based Power Systems: Concept, Modeling, and Analysis

Wang

Blaabjerg

2019

IEEE Trans. Smart Grid

934

495

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The large-scale integration of power electronicbased systems poses new challenges to the stability and power quality of modern power grids. The wide timescale and frequency-coupling dynamics of electronic power converters tend to bring in harmonic instability in the form of resonances or abnormal harmonics in a wide frequency range. This paper provides a systematic analysis of harmonic stability in the future power-electronic-based power systems. The basic concept and phenomena of harmonic stability are elaborated first. It is pointed out that the harmonic stability is a breed of small-signal stability problems, featuring the waveform distortions at the frequencies above and below the fundamental frequency of the system. The linearized models of converters and system analysis methods are then discussed. It reveals that the linearized models of ac-dc converters can be generalized to the harmonic transfer function, which is mathematically derived from linear time-periodic system theory. Lastly, future challenges on the system modeling and analysis of harmonic stability in large-scale power electronic based power grids are summarized.

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Section: A Eigenvalue Analysismentioning

confidence: 99%

Harmonic Stability in Power Electronic-Based Power Systems: Concept, Modeling, and Analysis

Wang

Blaabjerg

2019

IEEE Trans. Smart Grid

934

495

View full text Add to dashboard Cite

show abstract

“…In that sense, it is necessary to have a quantitative method that measures the effect on the poles of the entire system (eigenvalues) from varying the state variables in each subsystem [20]. The entire SS model can be found using a systematic and modular method called Component Connection Method (CCM) [22], [23]. Also, by the help of CCM, the problematic state variables in each subsystem can be managed and visible easily [21].…”

Section: Introductionmentioning

confidence: 99%

The Application of Vector Fitting to Eigenvalue-Based Harmonic Stability Analysis

Bakhshizadeh

Yoon

Hjerrild

et al. 2017

IEEE J. Emerg. Sel. Topics Power Electron.

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Abstract-Participation factor analysis is an interesting feature of the eigenvalue-based stability analysis in a power system, which enables the developers to identify the problematic elements in a multi-vendor project like in an offshore wind power plant. However, this method needs a full state space model of the elements that is not always possible to have in a competitive world due to confidentiality. In this paper, by using an identification method, the state space models for power converters are extracted from the provided data by the suppliers. Some uncertainties in the identification process are also discussed and solutions are proposed, and in the end the results are verified by time domain simulations for linear and nonlinear cases with different complexities, no matter which domain (phase or dq) is used.

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“…The CCM is basically a reformulation of the conventional state-space model according to terminal characteristic. It is a computationally-efficient method to implement system modeling [12]- [13]. In this approach, the power system is first partitioned into individual components which can be represented by diagonal matrices.…”

mentioning

confidence: 99%

Small-Signal Stability Analysis of Inverter-Fed Power Systems Using Component Connection Method

Wang

Chen

et al. 2018

IEEE Trans. Smart Grid

139

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The small time constants of power electronics devices lead to dynamic couplings with the electromagnetic transients of power networks, and thus complicate the modeling and stability analysis of power-electronics-based power systems. This paper presents a computationally-efficient approach to assess the small-signal stability of inverter-fed power systems. The power system is partitioned into individual components, including the power inverters, network impedances, and power loads. The state-space model of individual inverter is first built, where the frequency response and eigenvalue analysis collectively characterize the contributions of different controller parameters to the terminal behavior in a wide frequency range. These component models, together with the network equations, are then algebraically assembled based on the interconnection relations at their terminals. As a consequence, the state matrix of the whole system, which is essential to the system stability analysis, can be reformulated in a computationally-efficient way. The experimental results are finally given to validate the effectiveness of the modeling method and system stability analysis.

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Comparative analysis and study of the dynamic stability of AC/DC systems

Cited by 38 publications

References 1 publication

Harmonic Stability in Power Electronic-Based Power Systems: Concept, Modeling, and Analysis

Harmonic Stability in Power Electronic-Based Power Systems: Concept, Modeling, and Analysis

The Application of Vector Fitting to Eigenvalue-Based Harmonic Stability Analysis

Small-Signal Stability Analysis of Inverter-Fed Power Systems Using Component Connection Method

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