Journal ArticleDOI
A Comparative Study of Two Widely Used Grid-Forming Droop Controls on Microgrid Small-Signal Stability
Wei Du,Zhe Chen,Kevin P. Schneider,Robert H. Lasseter,Sai Pushpak Nandanoori,Francis K. Tuffner,Soumya Kundu +6 more
TLDR
The results show that the microgrid has a larger small-signal stability boundary when using single-loop droop control, and this difference increases as the value of an inverter’s inner filter inductance increases.Abstract:
Historically, two similar grid-forming droop controls are widely reported in literature—the single-loop and multi-loop droop controls. Although being very similar, the authors find that the dynamic performance and stability characteristics of each control method are very different in a microgrid. Compared with the single-loop droop control, the multi-loop droop control is prone to be less damped and loses stability more easily under some circumstances. This article provides a novel insight into the different dynamic responses of the two basic controls. It points out that the two similar controls adjust the angular frequency and voltage magnitude at different locations within the inverter, resulting in different coupling reactances that impact the dynamic response and stability of microgrids differently. The use of the single-loop droop control results in a larger coupling reactance, which helps improve the dynamic response and stability. This novel insight is verified through full-order small-signal analysis, offline electromagnetic transient simulation, and real-time hardware-in-the-loop simulation experiments. The results show that the microgrid has a larger small-signal stability boundary when using single-loop droop control, and this difference increases as the value of an inverter’s inner filter inductance increases.read more
Citations
More filters
Journal ArticleDOI
Grid Forming Inverter Modeling, Control, and Applications
Dayan B. Rathnayake,Milad Akrami,C. Phurailatpam,Si Phu Me,Sajjad Hadavi,Gamini Jayasinghe,Sasan Zabihi,Behrooz Bahrani +7 more
TL;DR: In this article, the authors present a comprehensive review of grid forming inverters (GFMIs) covering recent advancements in control technologies, fault ride-through capabilities, stability enhancement measures, and practical implementations.
Journal ArticleDOI
Modeling of Grid-Forming and Grid-Following Inverters for Dynamic Simulation of Large-Scale Distribution Systems
Wei Du,Francis K. Tuffner,Kevin P. Schneider,Robert H. Lasseter,Jing Xie,Zhe Chen,Bishnu P. Bhattarai +6 more
TL;DR: Three-phase, electromechanical models for both grid-forming and grid-following inverters are developed and integrated into an open source, three-phase distribution network solver, thereby enabling dynamic simulation of large-scale, two-phase unbalanced distribution systems with high penetration of inverter-based DERs.
Journal ArticleDOI
Operation and Control of a Hybrid Coupled Interlinking Converter for Hybrid AC/Low Voltage DC Microgrids
TL;DR: Simulation and experimental results are provided to verify that the proposed hybrid coupled interlinking converter (HCIC) for hybrid ac/LVdc microgrids has the ability of good power flow control and power quality compensation, which not only meets the power flow requirements with low rating system, but also greatly promotes the development of more robust hybrid ac-DC microgrid.
Journal ArticleDOI
Transient Stability of Single-Loop Voltage-Magnitude Controlled Grid-Forming Converters
Teng Liu,Xiongfei Wang +1 more
TL;DR: In this article, a design-oriented analysis on the transient stability of grid-forming (GFM) converters using single-loop voltage-magnitude control scheme is presented, and it is revealed that the use of the VMC controller has a critical impact on the GFM transient stability.
Journal ArticleDOI
Stability and control of power systems with high penetrations of inverter-based resources: An accessible review of current knowledge and open questions
Rick Wallace Kenyon,Rick Wallace Kenyon,Matthew Bossart,Marija Marković,Kate Doubleday,Kate Doubleday,Reiko Matsuda-Dunn,Reiko Matsuda-Dunn,Stefania Mitova,Simon A. Julien,Elaine Hale,Bri-Mathias Hodge,Bri-Mathias Hodge +12 more
TL;DR: Current knowledge and open research questions concerning the interplay between asynchronous inverter-based resources (IBRs) and cycle- to second-scale power system dynamics are reviewed, with a focus on how stability and control may be impacted or need to be achieved differently when there are high instantaneous penetrations of IBRs across an interconnection.
References
More filters
Journal ArticleDOI
Hierarchical control of droop-controlled DC and AC microgrids — a general approach towards standardization
TL;DR: The hierarchical control derived from ISA-95 and electrical dispatching standards to endow smartness and flexibility to MGs is presented and results are provided to show the feasibility of the proposed approach.
Journal ArticleDOI
Control of Power Converters in AC Microgrids
TL;DR: In this paper, a detailed analysis of the main operation modes and control structures for power converters belonging to micro-grids is carried out, focusing mainly on grid-forming, grid-feeding, and grid-supporting configurations.
Journal ArticleDOI
Modeling, Analysis and Testing of Autonomous Operation of an Inverter-Based Microgrid
TL;DR: In this paper, the authors developed a model for autonomous operation of inverter-based micro-grids, where each sub-module is modeled in state-space form and all are combined together on a common reference frame.
Journal ArticleDOI
Trends in Microgrid Control
Daniel E. Olivares,Ali Mehrizi-Sani,Amir H. Etemadi,Claudio A. Canizares,Reza Iravani,Mehrdad Kazerani,Amir H. Hajimiragha,Oriol Gomis-Bellmunt,Maryam Saeedifard,Rodrigo Palma-Behnke,Guillermo Jimenez-Estevez,Nikos Hatziargyriou +11 more
TL;DR: The major issues and challenges in microgrid control are discussed, and a review of state-of-the-art control strategies and trends is presented; a general overview of the main control principles (e.g., droop control, model predictive control, multi-agent systems).
Journal ArticleDOI
Design and control of an LCL-filter-based three-phase active rectifier
TL;DR: In this article, a step-by-step procedure for designing the LCL filter of a front-end three-phase active rectifier is proposed to reduce the switching frequency ripple at a reasonable cost, while at the same time achieving a high-performance front end rectifier.