Modeling Techniques and Stability Analysis Tools for Grid-Connected Converters

Peng, Qilin; Buticchi, Giampaolo; Tan, Nadia M. L.; Guenter, Sandro; Yang, Jiajun; Wheeler, Patrick

doi:10.1109/ojpel.2022.3190103

Cited by 15 publications

(4 citation statements)

References 99 publications

(121 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The stability of the control strategy depicted in Fig. 3 is validated through impedance stability analysis based on the GNC in the dq reference frame, as detailed in [31], [32]. The robustness of the proposed control strategy is tested in strong, weak, and very weak grids considering the system parameters listed in Table 1.…”

Section: Stability Analysismentioning

confidence: 99%

Double-Synchronous-Reference-Frame-Based Power-Synchronized PLL-Less Grid-Following Inverters for Unbalanced Grid Faults

Mohammed

Zhou

Bahrani

2023

IEEE Open J. Power Electron.

View full text Add to dashboard Cite

This article proposes a double-synchronous-reference-frame-based power-synchronized gridfollowing inverter (DS-PSGFLI). In contrast to existing types of phase-locked-loop (PLL)-based gridfollowing inverters (GFLIs) and PLL-less power-synchronized GFLIs (PSGFLIs), the suggested PLL-less DS-PSGFLI operates seamlessly during unbalanced grid faults in both strong and weak grid connections, while maintaining stability and avoiding oscillations. Furthermore, unlike previous control strategies for PSGFLIs that regulate terminal output power, the proposed method regulates the power at the point of common coupling (PCC). This approach aligns with common PCC control strategies in GFLIs and grid-forming inverters, thereby avoiding the impacts of voltage drop across the inverter output filter and high voltage harmonics at the inverter terminal. In the proposed DS-PSGFLI, the positive and negative sequences of the PCC voltage and current measurements are first extracted. Then, an outer power controller is employed to regulate the positive active and reactive power at the PCC to the desired references. The outer power controller generates both the positive internal angle required for grid synchronization and the positive current reference for the inner current of the positive sequence loop. When unbalanced grid faults occur, the negative sequence loop adjusts its output signals to mitigate the resulting oscillations at twice the fundamental frequency. The effectiveness of the proposed control strategy is validated through simulations and experimental tests, demonstrating its reliable performance across a wide range of test scenarios.INDEX TERMS Phase locked loops, positive and negative sequence control, power-synchronized control, PLL-less inverters, short-circuit-ratio, stability, unbalanced grid voltage, weak grid.

show abstract

Section: Stability Analysismentioning

confidence: 99%

Double-Synchronous-Reference-Frame-Based Power-Synchronized PLL-Less Grid-Following Inverters for Unbalanced Grid Faults

Mohammed

Zhou

Bahrani

2023

IEEE Open J. Power Electron.

View full text Add to dashboard Cite

show abstract

“…The resulting phasors avoid frequency overlapping and perform as stationary phasors in a steady state but retain slow amplitude and frequency variations of electrical quantities under dynamic conditions [19]. Windowing mismatches due to grid frequency variations might deteriorate the model performance, but under slow ones, the results are considered accurate enough [20], [21], [22].…”

Section: Introductionmentioning

confidence: 99%

Generalized Envelope-Based Modeling of Single-Phase Grid-Connected Power Converters

Azcondo,

Pigazo,

Brañas

et al. 2024

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

In-depth models of single-phase grid-tied power converters facilitate the examination of lowfrequency (LF) interactions among loads, distributed energy resources (DERs), and synchronous generators by operators and designers. These interactions are becoming increasingly significant with the growing integration of power electronics into electrical grids. This article extends the envelope modeling (EM) technique to develop LF linear time-invariant (LTI) circuit models for single-phase grid-tied power converters. The models utilize an independent phase signal that aligns with the most appropriate reference frame. This methodology preserves the LF dynamics inherent to the power converter and control system. The practicality of this method is evidenced by constructing a model for a bridgeless totem-pole power factor corrector (PFC), which includes a zero-crossing detector (ZCD) and operates without closed-loop regulation. The outcomes from this model are juxtaposed with those from a switched model and other well-stablished modeling techniques for comparison. Furthermore, a commercially available circuit design featuring current and voltage control loops is simulated, and the results are corroborated with experimental data. These experiments are conducted under disturbances influencing the converter's performance within its linear operational range.

show abstract

“…A list of emerging modeling methods for converter-intensive systems is available in [13,14]. Positive-sequence dynamic phasor modeling methods represent the dynamics of network elements [15] and are known to provide an accuracy comparable to EMT simulations with lower computational complexity.…”

Section: Introductionmentioning

confidence: 99%

Modular Dynamic Phasor Modeling and Simulation of Renewable Integrated Power Systems

Peiris,

Filizadeh,

Muthumuni

2024

Energies

View full text Add to dashboard Cite

This paper presents a dynamic-phasor-based, average-value modeling method for power systems with extensive converter-tied subsystems. In the proposed approach, the overall system model is constructed using modular functions, interfacing both conventional and converter-tied resources. Model validation is performed against detailed Electro-Magnetic Transient (EMT) simulations. The analytical capabilities offered by the proposed modeling method are demonstrated on a modified IEEE 9-bus system. A Graphics Processing Unit (GPU)-based parallel computing approach for the solution of the resulting model is presented and exemplified on a modified IEEE 118-bus system, showing significant improvements in computing efficiency over EMT solvers. A co-simulation approach using a Central Processing Unit (CPU) and a GPU is also presented and exemplified using a modified version of the IEEE 118-bus system, demonstrating the model’s parallelization.

show abstract

Modeling Techniques and Stability Analysis Tools for Grid-Connected Converters

Cited by 15 publications

References 99 publications

Double-Synchronous-Reference-Frame-Based Power-Synchronized PLL-Less Grid-Following Inverters for Unbalanced Grid Faults

Double-Synchronous-Reference-Frame-Based Power-Synchronized PLL-Less Grid-Following Inverters for Unbalanced Grid Faults

Generalized Envelope-Based Modeling of Single-Phase Grid-Connected Power Converters

Modular Dynamic Phasor Modeling and Simulation of Renewable Integrated Power Systems

Contact Info

Product

Resources

About