Harmonic Power-Flow Study of Polyphase Grids With Converter-Interfaced Distributed Energy Resources—Part I: Modeling Framework and Algorithm

Kettner, Andreas Martin; Reyes-Chamorro, Lorenzo; Becker, Johanna Kristin Maria; Zou, Zhixiang; Liserre, Marco; Paolone, Mario

doi:10.1109/tsg.2021.3120108

Cited by 18 publications

(26 citation statements)

References 50 publications

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“…A flat start for x e is chosen by considering v dc = v * dc , v cc = v * g and the other state variables null, the Newton-Raphson algorithm is executed, and the equilibrium point x e is computed [7]. In the case when the equilibrium point does not exist due to exceeded static power transfer limit, the Newton-Raphson algorithm did not converge, as expected [32].…”

Section: B Equilibrium Point Computation and Model Linearizationmentioning

confidence: 84%

“…It is important to remark that the equilibrium point does not always exist [32]. By increasing the active power P * , i.e.…”

Section: B Equilibrium Point Computation and Model Linearizationmentioning

confidence: 98%

“…are not present in Fig. 9(a) and not considered in this paper, since for those values the equilibrium point does not exist and the Newton-Raphson algorithm does not converge [17], [32].…”

Section: A Robustness Under Scr and Operating Point Variationsmentioning

confidence: 99%

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State Feedback Reshaping Control of Voltage Source Converter

Cecati

Zhu

Pugliese

et al. 2022

IEEE Trans. Power Electron.

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Admittance reshaping is a widely used strategy to address the converters low-frequency stability issues in weak grid, caused by the PLL and its interaction with the dc and ac voltage control. However, the asymmetric control of the d-and q-axis current references and the coupling between the converter ac and dc side restricts the damping capability of Single-Input-Single-Output feedbacks. This phenomena gets even worse in presence of nearby converters. This paper extends the concept of admittance reshaping to Multi-Input-Multi-Output (MIMO) control. A full state-feedback is added to the current reference of the converter to increase the damping of the conventional multi-loop control. A systematic offline algorithm is delegated to design the feedback, and a scalar coefficient is employed to activate/deactivate online the reshaping feedback, making the proposed solution user-friendly. The proposed control is analyzed both in time-and frequencydomain and tested in parallel-operation with other converters, and shows higher damping capability than conventional solutions and good robustness with respect to grid impedance and operating point variations. Experimental tests under ac and dc disturbances are conducted both in lab setup and in Hardware-In-the-Loop.

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Section: B Equilibrium Point Computation and Model Linearizationmentioning

confidence: 84%

“…It is important to remark that the equilibrium point does not always exist [32]. By increasing the active power P * , i.e.…”

Section: B Equilibrium Point Computation and Model Linearizationmentioning

confidence: 98%

See 1 more Smart Citation

State Feedback Reshaping Control of Voltage Source Converter

Cecati

Zhu

Pugliese

et al. 2022

IEEE Trans. Power Electron.

Self Cite

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“…Taking into account the different functions of grid-forming and grid-following DERs in the microgrid system [33], the network that connects DERs and power loads can be represented by a hybrid network parameter matrix [34], as given in (1), which gives the constraint between node currents and voltages.…”

Section: A Identification Of Hybrid Network Parameter Matrixmentioning

confidence: 99%

Modularized Bilinear Koopman Operator for Modeling and Predicting Transients of Microgrids

Jiang¹,

Li²,

Huang³

2022

Preprint

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Modularized Koopman Bilinear Form (M-KBF) is presented to model and predict the transient dynamics of microgrids in the presence of disturbances. As a scalable data-driven approach, M-KBF divides the identification and prediction of the high-dimensional nonlinear system into the individual study of subsystems; and thus, alleviating the difficulty of intensively handling high volume data and overcoming the curse of dimensionality. For each subsystem, Koopman bilinear form is applied to efficiently identify its model by developing eigenfunctions via the extended dynamic mode decomposition method with an eigenvalue-based order truncation. Extensive tests show that M-KBF can provide accurate transient dynamics prediction for the nonlinear microgrids and verify the plug-and-play modeling and prediction function, which offers a potent tool for identifying high-dimensional systems. The modularity feature of M-KBF enables the provision of fast and precise prediction for the microgrid operation and control, paving the way towards online applications.

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“…In addition, with the rapid development of power electronics technology in different aspects of power systems (Xiao et al, 2021), (Sun et al, 2020a), power electronic devices have been widely used for the source-grid-load-storage (Kettner et al, 2021), (Ebrahimzadeh et al, 2019). In the active distribution network, the nonlinear loads represented by user appliances are emerging (Sun et al, 2020b), renewable energy generation represented by photovoltaic is gradually accessed (Gao et al, 2021), and the energy storage also needs the AC/DC conversion with power electronic equipment, which affects the system harmonic condition (Ghofrani et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Source-grid-load-storage interactive power quality characteristic of active distribution network

Lou

Sun

et al. 2022

Front. Energy Res.

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Source-grid-load-storage has represented an interactive characteristic in the active distribution network (ADN). Moreover, power electronic devices have been widely used for source-grid-load-storage with the rapid development of power electronics technology. In this condition, the large-scale distributed source may cause voltage quality degradation, while the application of large-scale power electronics equipment may also lead to serious harmonic distortion. Power quality has become one of the most important issues in the development of ADN. In this paper, the source-grid-load-storage interactive power quality characteristic of the ADN is analyzed. Firstly, considering the source-grid-load-storage interaction in ADN, the voltage deviation and fluctuation are analyzed and the degrees are further quantified. Then, the source-load-storage harmonic models for the power electronic components are built, which is the basis for harmonic analysis. Moreover, the decoupled harmonic power flow algorithm for ADN is proposed to analyze the system harmonic distributions. Finally, considering the location and capacity of photovoltaic and energy storage, the interaction and power quality are analyzed in the IEEE 33-bus distribution system. With the access of energy storage, more than 20% of the voltage deviation and more than 6% of the voltage fluctuation caused by photovoltaics are effectively suppressed, while the harmonic distortion may be further increased.

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Harmonic Power-Flow Study of Polyphase Grids With Converter-Interfaced Distributed Energy Resources—Part I: Modeling Framework and Algorithm

Cited by 18 publications

References 50 publications

State Feedback Reshaping Control of Voltage Source Converter

State Feedback Reshaping Control of Voltage Source Converter

Modularized Bilinear Koopman Operator for Modeling and Predicting Transients of Microgrids

Source-grid-load-storage interactive power quality characteristic of active distribution network

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