Journal ArticleDOI
Power sharing control strategies for a three-phase microgrid in different operating condition with droop control and damping factor investigation
Reads0
Chats0
TLDR
In this paper, a microgrid with two voltage source inverters operating in islanded or grid-connected mode is analyzed, and the active power control by droop coefficients and reference frequencies is demonstrated.Abstract:
In this study, a microgrid with two voltage source inverters (VSIs), operating in islanded or grid-connected mode is analysed. The active power control by droop coefficients and reference frequencies is demonstrated. In addition, the inductive and resistive droop strategies are compared by considering the complex line impedance. By measuring the line impedance in the prototype, it was found that, even for the low-voltage microgrid, the line impedance was not predominantly resistive, but complex. For this line impedance condition, an investigation to determine the best droop control law considering the partial derivatives. Observing the partial derivatives and the experimental results obtained it is demonstrated that inductive droop control is better to control the active power for complex line impedance. For a scenario with resistive unbalanced loads and different power sharing between the inverters, the proposed control, implemented in the a–b–c reference frame, was validated. A novel absolute damping factor is developed to improve the transient response and reduce the reactive power flow. The VSIs are connected to the grid without transformers to reduce the connection costs. Simulation and experimental results are presented to confirm the improvements achieved using the implemented control method.read more
Citations
More filters
Journal ArticleDOI
Review of Active and Reactive Power Sharing Strategies in Hierarchical Controlled Microgrids
TL;DR: In this article, the adaptive/improved droop control, network-based control methods, and cost-based droop schemes are compared and summarized for active power sharing for islanded microgrids.
Journal ArticleDOI
Optimal operation of hybrid AC/DC microgrids under uncertainty of renewable energy resources: A comprehensive review
Motahareh Pourbehzadi,Taher Niknam,Jamshid Aghaei,Geev Mokryani,Miadreza Shafie-khah,Joao P. S. Catalao +5 more
TL;DR: A comprehensive review of the fundamentals of hybrid AC/DC microgrids and describes their components, including operational zones, control and optimization methods, power flow calculations in the presence of uncertainties related to renewable energy sources.
Journal ArticleDOI
Review of hierarchical control strategies for DC microgrid
Anand Abhishek,Aashish Ranjan,Sachin Devassy,Brijendra Kumar Verma,Subhash Kumar Ram,Ajeet Kr. Dhakar +5 more
TL;DR: Different methods of primary control for current and voltage regulation, secondary control for error-correction in voltage and current, power sharing in a microgrid and microgrid clusters and tertiary control for power and energy management with a primary focus on minimal power loss and operational cost in a DC microgrid system are reviewed in-depth.
Journal ArticleDOI
A comprehensive survey on control strategies of distributed generation power systems under normal and abnormal conditions
Mehmet Emin Meral,Doğan Çelik +1 more
TL;DR: A comprehensive review on various advanced control strategies and PNS extractors for interlinking three phase inverter in the DGPSs are comprehensively investigated and discussed under normal and abnormal conditions.
Journal ArticleDOI
Accurate Estimation of Single-Phase Grid Voltage Fundamental Amplitude and Frequency by Using a Frequency Adaptive Linear Kalman Filter
TL;DR: In this article, the performance of a linear Kalman filter (LKF)-based technique to estimate the single-phase grid voltage fundamental amplitude and frequency under distorted grid conditions is reported.
References
More filters
Journal ArticleDOI
Control of parallel connected inverters in stand-alone AC supply systems
TL;DR: In this article, a control scheme for parallel-connected inverters in a standalone AC supply system is presented, which uses feedback of only those variables that can be measured locally at the inverter and does not need communication of control signals between the inverters.
Journal ArticleDOI
Power Management Strategies for a Microgrid With Multiple Distributed Generation Units
F. Katiraei,M.R. Iravani +1 more
TL;DR: In this article, real and reactive power management strategies of EI-DG units in the context of a multiple DG microgrid system were investigated. And the results were used to discuss applications under various microgrid operating conditions.
Journal ArticleDOI
A Voltage and Frequency Droop Control Method for Parallel Inverters
TL;DR: In this paper, a new control method for the parallel operation of inverters operating in an island grid or connected to an infinite bus is described, where each inverter supplies a current that is the result of the voltage difference between a reference ac voltage source and the grid voltage across a virtual complex impedance.
Journal ArticleDOI
An Accurate Power Control Strategy for Power-Electronics-Interfaced Distributed Generation Units Operating in a Low-Voltage Multibus Microgrid
Yun Wei Li,Ching-Nan Kao +1 more
TL;DR: In this article, a power control strategy for a low-voltage microgrid is proposed, where the mainly resistive line impedance, the unequal impedance among distributed generation (DG) units, and the microgrid load locations make the conventional frequency and voltage droop method unpractical.
Journal ArticleDOI
Decentralized Control for Parallel Operation of Distributed Generation Inverters Using Resistive Output Impedance
TL;DR: The paper explorers the resistive output impedance of the parallel-connected inverters in an island microgrid and proposes a novel wireless load-sharing controller for islanding parallel invertes in an ac distributed system.
Related Papers (5)
Reactive power sharing control based on voltage compensation strategy in microgrid
Bing Wang,Shirong Liu,Yao Zhang +2 more