Design-Oriented Analysis and Transient Stability Enhancement Control for a Virtual Synchronous Generator

Ge, Pingjuan; Tu, Chunming; Guo, Qi; Gao, Jinsheng

doi:10.1109/tie.2022.3172761

Cited by 29 publications

(9 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The conventional analysis process for high-order nonlinear systems is limited by the available transient stability analysis tools. Therefore, a corresponding quasi-steady-state model is commonly developed for grid-forming VSCs, and the phase diagram of the system operation trajectory is utilized to evaluate the transient dynamics of low-order systems [28]. For comparison, the commonly used quasi-steady-state model was established and derived to illustrate its limitations in the modeling process.…”

Section: Discussionmentioning

confidence: 99%

“…The VSG control strategy aims to simulate the droop and inertia characteristics of the active power loop in SGs, as well as the voltage droop characteristics in the reactive power loop. Therefore, in the VSG control strategy, the outer active power loop generates the phase-angle reference value, the reactive power loop generates the voltage-magnitude reference value, and then the voltage and current double inner loops are adopted for voltage tracking and construction [28]. For a VSC with grid-forming control to assist in generating AC voltage, it requires a front-end converter or a stable energy system, or a large capacitor on the DC side to provide voltage and power support.…”

Section: Principle Of Vsg Controlmentioning

confidence: 99%

“…Based on the analysis of the ROAs and corresponding initial points displayed in Figure 6, it is evident that when the parameters of the inner loop are altered, the ROAs and initial points of the system can undergo substantial variations, ultimately leading to different levels of transient stability. In contrast, the adoption of the quasi-steady-state model and stability analysis method described in [28] allows the system to sustain transient stability under a particular set of outer loop parameters. However, this approach fails to provide insights into the specific impacts of inner loop parameters on stability.…”

Section: Case Iv: Influence Of Inner Loop Parameters On Transient Sta...mentioning

confidence: 99%

“…Furthermore, a modified VSG control model was developed, and a method using virtual resistance was proposed to enhance both small-signal stability and transient stability [27]. Another study [28] suggests that the currently used models for transient stability in the existing literature are oversimplified, employing fifth-order models for numerical fitting and describing the transient boundary using the critical clearing angle (CCA) and critical clearing time (CCT).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Transient Stability Analysis for Grid-Forming VSCs Based on Nonlinear Decoupling Method

Xia

et al. 2023

Sustainability

View full text Add to dashboard Cite

With the increasing integration of renewable energy into the power grid, there is a growing demand for converters that not only provide stable power, but also support auxiliary functions such as grid-voltage regulation. Consequently, grid-forming strategies have attracted significant attention. However, due to the complexities of analyzing nonlinear coupling systems, a comprehensive transient stability analysis of grid-forming converters is still being explored. Conventional analysis methods rely on a simplified quasi-steady-state model for grid-forming voltage source converters (VSCs) and focus on analyzing the transient instability phenomenon caused by the outer power loop. However, this oversimplified model may yield incorrect conclusions. To address this limitation, this paper develops a full-order model that includes quadratic nonlinear terms to accurately represent the system’s nonlinear characteristics. The developed model is then decoupled into multiple low-order modes using a nonlinear decoupling method. These low-order modes can be analyzed using the mature inversing trajectory method, indirectly reflecting the transient stability of grid-forming VSCs under large disturbances. Through varying the inner and outer parameters, the transient stability of grid-forming VSCs is analyzed in detail. Furthermore, the analysis results are verified through hardware-in-loop (HIL) experiments.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Principle Of Vsg Controlmentioning

confidence: 99%

Section: Case Iv: Influence Of Inner Loop Parameters On Transient Sta...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Transient Stability Analysis for Grid-Forming VSCs Based on Nonlinear Decoupling Method

Xia

et al. 2023

Sustainability

View full text Add to dashboard Cite

show abstract

“…In order to analyze the influence of different parameters on the transient power angle stability of the VSG-SVG parallel system, the trajectory of the power angle motion under different influencing factors can be plotted based on the phase plane method. 29 First, the second-order power angle characteristic equation of the VSG-SVG parallel system needs to be established. Substituting Equation (11) into Equation ( 4), it can be derived that…”

Section: Modeling Of Transient Power Angle Characteristicsmentioning

confidence: 99%

Transient power angle stability analysis and improvement strategy for parallel system of virtual synchronous generator and static var generator

Xiao,

Jiang,

et al. 2023

Circuit Theory & Apps

View full text Add to dashboard Cite

SummaryVirtual synchronous generators (VSGs) can actively support the frequency and voltage of the grid and are widely used in new energy power plants. Static var generators (SVGs) can improve the reactive power–voltage drop characteristics of the VSG and increase its ability to cope with complex operating conditions. However, the interaction between the VSG and the SVG can affect the output characteristics of the VSG and thus its transient power angle stability. Therefore, this paper proposes a method for analyzing the transient power angle stability of a VSG–SVG parallel system and its improvement strategy. Firstly, based on the equivalent circuit of the parallel system, the interaction‐coupled power model and the transient power angle characteristic model are derived. On this basis, the influence law of various parameters on the transient stability of VSG is analyzed based on the phase plane method. Secondly, a strategy is proposed to improve the transient power angle stability of the VSG–SVG parallel system based on the adaptive regulation of active power, and the feasibility of the strategy is verified by comparing the phase plane diagrams before and after the improved control. Finally, the effectiveness of the proposed model and strategy is verified by Matlab/Simulink simulation.

show abstract

Adaptive optimization of virtual synchronous generator based on fuzzy logic control and differential evolution

Awda,

Alowaifeer

2024

Ain Shams Engineering Journal

View full text Add to dashboard Cite

Design-Oriented Analysis and Transient Stability Enhancement Control for a Virtual Synchronous Generator

Cited by 29 publications

References 29 publications

Transient Stability Analysis for Grid-Forming VSCs Based on Nonlinear Decoupling Method

Transient Stability Analysis for Grid-Forming VSCs Based on Nonlinear Decoupling Method

Transient power angle stability analysis and improvement strategy for parallel system of virtual synchronous generator and static var generator

Adaptive optimization of virtual synchronous generator based on fuzzy logic control and differential evolution

Contact Info

Product

Resources

About