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Control Method of Parallel Inverters with Self-Synchronizing Characteristics in Distributed Microgrid

Yan, Cui, Cui
2019 Energies  
an improved virtual synchronous generator (VSG) control strategy based on local data considering precise control of the droop coefficient and realizing the power decoupling and the expected droop characteristics  ...  without additional improvement of reactive power control.  ...  Improved VSG Control Strategy Considering the Precise Control of Droop Coefficient Modeling of Microgrid Inverter Based on VSG Control Strategy The overall control block diagram of the microgrid inverter  ... 
doi:10.3390/en12203871 fatcat:y2vaqh4kbzccfgv5gxzpdv3j2i

Investigations of Decoupled Trigonometric Saturated and Fuzzy Logic Techniques for the Automatic Frequency Control of Islanded Microgrid

Mohammed Ali Alshehri, Sreerama Kumar R.
2021 European Journal of Engineering and Technology Research  
In order to improve the frequency control of traditional droop control technique applied in islanded microgrid, It is proposed to investigate the Decoupled Trigonometric Saturated (DTS) and fuzzy droop  ...  At present, this method has also been applied to the control of parallel inverters to share the load demand in proportion to their ratings.  ...  Then we compare the Decoupled trigonometric saturated droop control with the traditional controller of droop.  ... 
doi:10.24018/ejers.2021.6.4.2462 fatcat:li3wlwgftnawfbjkmuxayyp2gq

Control principles of micro-source inverters used in microgrid

Wenming Guo, Longhua Mu
2016 Protection and Control of Modern Power Systems  
Then, the main problems and some typical improved schemes of the ωU-droop grid-supporting inverter are presented.  ...  Since micro-sources are mostly interfaced to microgrid by power inverters, this paper gives an insight of the control methods of the micro-source inverters by reviewing some recent documents.  ...  Acknowledgments This work was supported in part by Nation Natural Science Foundation of China (51407128) and the key technologies research project on distribution network reconfiguration of State Grid  ... 
doi:10.1186/s41601-016-0019-8 fatcat:f62pkiikhjerzjtwvhwkicew3y

Improved P-f/Q-V and P-V/Q-f droop controllers for parallel distributed generation inverters in AC microgrid

Chethan Raj D, D.N. Gaonkar, Josep M. Guerrero
2018 Sustainable cities and society  
The traditional P-f/Q-V droop control and P-V/Q-f droop control as the research background, the main research is summarized on the following aspects: Droop decoupling control strategy [12] , droop coefficient  ...  Simulation results demonstrate that the proposed control and the selection of parameters enhance the output voltage of inverters. 2 based on active and reactive power droop control is proposed [11], [12  ...  of the Pf/Q-V droop control to improve the power decoupling effect.  ... 
doi:10.1016/j.scs.2018.04.026 fatcat:so34phs3n5ebbepdf5xfkmlqm4

Small-signal stability enhancement of communicationless parallel connected inverters

R. M. Santos Filho, P. F. Seixas, P. C. Cortizo, G. Gateau
2009 2009 35th Annual Conference of IEEE Industrial Electronics  
Based on a multivariable approach, this paper proposes the application of decoupling to the control of parallel inverters in order to increase stability range concerning the connection impedance composition  ...  In this paper, small-signal stability issues of parallel-connected voltage source inverters without control interconnections are addressed by means of a multivariable approach.  ...  When decoupling is used, the droop control loops are "crossed" and as a side effect the active power sharing accuracy deteriorates.  ... 
doi:10.1109/iecon.2009.5415032 fatcat:lvt2u4bxuzh3fa2ijq5dlisyh4

Decentralized Virtual Impedance- Conventional Droop Control for Power Sharing for Inverter-Based Distributed Energy Resources of a Microgrid

Elutunji Buraimoh, Anuoluwapo O. Aluko, Oluwafemi E. Oni, Innocent E. Davidson
2022 Energies  
The work presents the power-sharing in a standalone low voltage AC microgrid consisting of three parallel grid supporting inverters using a virtual impedance-based droop system.  ...  Typically, isolated microgrids suffer unique challenges regarding voltage, current, frequency regulation, power flow control, and power-sharing due to the absence of a stiff AC grid source.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/en15124439 fatcat:df53izassfarldvqkl3mfgf4le

Extra transient block for virtual synchronous machine with better performance

Peide Sun, Rongcai Pan
2019 IET Generation, Transmission & Distribution  
the mutual dependence between damping coefficient and droop coefficient caused by the use of inner reference frequency.  ...  After that, the power coupling situation is analysed and comparisons with other control strategies are presented.  ...  Although the power decoupling of ETB control at this situation is better, however, the dynamic response of ETB control are not better than that of AIC control, t r of ETB is smaller while t s is larger  ... 
doi:10.1049/iet-gtd.2018.6990 fatcat:lrwxbgzpyza25fohv4qg33apga

PQ-Coupling Strategy for Droop Control in Grid-Connected Capacitive-Coupled Inverter

Keng-Weng Lao, Wenyang Deng, Jingjing Sheng, Ningyi Dai
2019 IEEE Access  
Droop control has been a well-known technique for power-sharing control of the grid-connected inverters.  ...  However, droop control with special strategy is required for capacitive-coupled inverters (CCIs) since the large coupling capacitance in CCI and decoupled nature in droop control massively narrow the controllable  ...  Section III then discusses and analyzes the phenomenon of narrowed controllable power range in CCI droop control caused of decoupled characteristics in droop control.  ... 
doi:10.1109/access.2019.2902314 fatcat:7artkrp5i5bbnhpzvhesscvut4

Uncovering Droop Control Laws Embedded Within the Nonlinear Dynamics of Van der Pol Oscillators [article]

Mohit Sinha, Florian Dorfler, Brian B. Johnson, Sairaj V. Dhople
2016 arXiv   pre-print
The general strategy of controlling inverters to emulate the behavior of nonlinear oscillators presents a compelling time-domain alternative to ubiquitous droop control methods which presume the existence  ...  This paper examines the dynamics of power-electronic inverters in islanded microgrids that are controlled to emulate the dynamics of Van der Pol oscillators.  ...  CORRESPONDENCE BETWEEN DROOP CONTROL AND VOC FOR INVERTER CONTROLIn this section, we derive the droop coefficients under which the dynamics of droop control match VOC.  ... 
arXiv:1411.6973v2 fatcat:ujgypmft35hcdjs346ovvi7vzm

Power Decoupling Method Based on the Diagonal Compensating Matrix for VSG-Controlled Parallel Inverters in the Microgrid

2017 Energies  
The thought of the virtual synchronous generator (VSG) for controlling the grid-connected inverters and providing virtual inertia to the microgrid is emerging as a wide extension of the droop control,  ...  In this paper, the principle of VSG control is introduced first.  ...  the inverter output voltage, which is the basis of the droop characteristics of VSG.  ... 
doi:10.3390/en10122159 fatcat:w6ibf2w2zjhvplopxcqwf7blta

A Droop Control Based Three Phase Bidirectional AC-DC Converter for More Electric Aircraft Applications

Xiancheng Zheng, Fei Gao, Husan Ali, Huamei Liu
2017 Energies  
This paper addresses the design and implementation of a droop controlled three phase bidirectional AC-DC converter for more electric aircraft (MEA) applications.  ...  The practical results show good performance of the bidirectional converter and demonstrate the effectiveness of the proposed control strategies.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/en10030400 fatcat:5ymcm7xefjckzlzpzkieabgxla

Precise modeling based on dynamic phasors for droop-controlled parallel-connected inverters

L. Wang, X. Q. Guo, H.R. Gu, W.Y. Wu, Josep M. Guerrero
2012 2012 IEEE International Symposium on Industrial Electronics  
This paper deals with the precise modeling of droop controlled parallel inverters.  ...  Simulation results show that the dynamic phasor model is able to predict accurately the stability margins of the system when the droop control gains exceed certain values.  ...  ACKNOWLEDGMENT This work was supported by the National Natural Science Foundation of China (50837003, 50977081), Hebei Province Universities Science Research Project (2011249) and Hebei Province Natural  ... 
doi:10.1109/isie.2012.6237133 dblp:conf/isie/WangGGWG12 fatcat:wizsfymzxnf43ilbfxx6u3lfrm

Impact of line and control parameters on Droop Stability in Inverters for Distributed Generation

A. Bolzoni, G. M. Foglia, L. Frosio, M. F. Iacchetti, R. Perini
2017 IEEE Transactions on Smart Grid  
The paper analyzes stability conditions and design requirements for the control parameters in droop-controlled inverters.  ...  NOMENCLATURE m, n (m d , n d ), m rest , n rest : linear (derivative) droop coefficients of the inverter under study, of the rest of the network [p.u.]; H i : grid-current compensation gain in the voltage  ...  Design guidelines The design of the voltage control parameters of an inverter to be connected to a microgrid in a droop-controlled mode starts from the basic transfer function of the voltage plant, neglecting  ... 
doi:10.1109/tsg.2017.2717869 fatcat:s3225ivttnaqpekyaqkvmdw7ei

The Virtual Harmonic Power Droop Strategy to Mitigate the Output Harmonic Voltage of the Inverter

Yuan Yao, Longyun Kang
2018 Energies  
Considering that droop control is the most common control algorithm used in the distributed system, a virtual harmonic power droop strategy which aims to mitigate the harmonic voltage is proposed in this  ...  Second, the output harmonic voltage issue and the mathematical model of the inverter are presented. In addition, the second-order generalized integrator is briefly discussed.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/en11092196 fatcat:t3pcbkaumzdojigxheq25xpdy4

An Overview on Operation and Control of Microgrid

XueSong Zhou, Tie Guo, YouJie Ma
2017 DEStech Transactions on Engineering and Technology Research  
A lot of control strategies are used in microgrid to achieve stable and reliable operation and smooth switching between two operation modes.  ...  Most of micro sources in a microgrid are interfaced through power electronic converters. It is an important task for different types of micro sources to be connected and form a microgrid.  ...  The work of Tie Guo was supported by the National Natural Science Foundation of China (50877053) and Tianjin Natural Science Foundation of China (09JCYBJC07100).  ... 
doi:10.12783/dtetr/mcee2016/6412 fatcat:3n73esqvxbgupkp7hhqnmtncbe
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