A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
Filters
Combination of Orthogonal Injections in Impedance Measurements of Grid-Connected Systems
2020
IEEE Access
Preserved Fulltext
The performance of the method is verified through experimental measurements of a 2.7 kW grid-connected system, where grid impedance measurements and terminal inverter output admittance measurements are ...
Impedance-based stability criterion has become a popular method in determining the stability of grid-connected systems. ...
Experimental measurements based on a grid-connected inverter system were presented to demonstrate the effectiveness of the proposed method. ...
doi:10.1109/access.2020.3026727
fatcat:esykeev7fzhqtmudulzf66c7hq
Frequency Coupling Admittance Modeling of Quasi-PR Controlled Inverter and its Stability Comparative Analysis Under the Weak Grid
2021
IEEE Access
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2021; you can also visit the original URL.
The file type is application/pdf.
Inverters are used as the interface for renewable energy to connect to the grid, thus its control method has received a lot of attention [4] - [5] . ...
After a positive-sequence disturbance voltage at the disturbance frequency f p being injected into the quasi-PR controlled inverter system. ...
doi:10.1109/access.2021.3093465
fatcat:xl46aqvisjbh5hv6mts23nu3ka
Sequence Impedance Measurement of Utility-Scale Wind Turbines and Inverters Reference Frame, Frequency Coupling, and MIMO/SISO Forms
2021
IEEE transactions on energy conversion
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2021; you can also visit the original URL.
The file type is application/pdf.
Existing methods for measuring sequence impedance with frequency coupling are complicated, not suitable for large wind turbines and inverters, and they can measure the sequence impedance in only one of ...
Sequence impedance responses are increasingly used for the stability analysis of converter-grid systems; however, many aspects of the sequence impedance measurement process, particularly those resulting ...
[35] presented a method to experimentally measure the sequence impedance with frequency coupling of a grid-connected inverter. ...
doi:10.1109/tec.2021.3093516
fatcat:62fm5emy5rbcvd5nlqqdhp7gse
Impedance Reshaping Control Strategy for Improving Resonance Suppression Performance of a Series-Compensated Grid-Connected System
2021
Energies
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2021; you can also visit the original URL.
The file type is application/pdf.
In the series-compensated grid-connected system (SCGCS), there is an impedance interaction between the inverter impedance and the grid impedance that is prone to cause resonance in the SCGCS. ...
It is found from the stability analysis that the impedance interaction between the inverter impedance and the grid impedance is the leading cause of the resonance. ...
It has become an essential method for analyzing inverter-based systems' stability because the sequence impedance model can be directly measured and has a simple form [12] . ...
doi:10.3390/en14102844
fatcat:24u2fj3z4ne4fkj4xljdja7rcy
Impedance Modeling and Stability Analysis of Three-phase Four-leg Grid-connected Inverter Considering Zero-sequence
2021
IEEE Access
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2021; you can also visit the original URL.
The file type is application/pdf.
controller(k0p) is Bode diagrams of the zero-sequence admittances of the inverter and the grid (red curve denotes the zero-sequence admittances of the inverter and blue curve denotes zero-sequence admittances ...
IMPEDANCE MODELLING OF THREE-PHASE FOUR-LEG GRID-CONNECTED INVERTER For the sake of establishing the model of three-phase fourleg grid-connected inverter, firstly, it is necessary to analyze the transmission ...
doi:10.1109/access.2021.3087331
fatcat:itc6t5vvevdbxjkitcdofuhhaa
Practical Implementation of Adaptive SRF-PLL for Three-Phase Inverters Based on Sensitivity Function and Real-Time Grid-Impedance Measurements
2020
Energies
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
The present work proposes method for adaptive control of the PLL based on the real-time measurements of the grid impedance, applying pseudo-random binary sequence (PRBS) injections. ...
High control bandwidth of the PLL makes the system sensitive to impedance-based stability issues when the inverter is connected to a weak grid that has high impedance. ...
Conclusions This paper has presented a method to adaptively adjust the PLL parameters of grid connected inverters based on real-time measurements of the grid impedance. ...
doi:10.3390/en13051173
fatcat:74hgtencurc4fajinjmj5i7hyi
Coupling-related Instability Mechanism and Mitigation Analysis of the Instantaneous Power Based Current Controlled Inverter
2020
IEEE Access
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
INDEX TERMS Current controlled inverter, instantaneous power, sequence-admittance, coupling-related instability. ...
Specifically, sequence-admittances of the IP-CCI are modeled, and interactions between sequence-couplings and circuit-coupling of the CCI-grid system are analyzed further. ...
If we assume that the inverter is stable when connected to a grid with zero impedance, and the grid is stable when an ideal current source with infinite impedance connected to it, then only if Hp(s) and ...
doi:10.1109/access.2020.3026490
fatcat:bcy2azuumfdnjpubecz2p6be7q
Intricacies of formulating measurement-based small signal models of inverter based resources
[article]
2022
arXiv
pre-print
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2022; you can also visit the original URL.
The file type is application/pdf.
The increasing number of inverter based resources (IBRs) connected to modern power systems necessitate accurate modeling of IBRs in stability studies. ...
accuracy of the measurement-based admittance model of the IBRs. ...
This work was funded by EPRI Research Program P173A: Modeling and Analytics with Emerging Technologies. ...
arXiv:2207.13641v1
fatcat:dxi5jp6ksrcarjj7kuq4atjjs4
Review of Impedance-Based Analysis Methods Applied to Grid-Forming Inverters in Inverter-Dominated Grids
2021
Energies
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2021; you can also visit the original URL.
The file type is application/pdf.
It then stands to reason that system impedances that are commonly used to analyze DC systems will be useful in the analysis of grid-forming inverters in these hybrid systems. ...
define, assess, and improve the performance of grid-forming inverter controllers. ...
Conflicts of Interest: The author declares no conflict of interest. ...
doi:10.3390/en14092686
fatcat:3ftthok6ozh4poj7itcl5blbgm
Impact of Positive Sequence Admittance and Negative Sequence Conductance of D-Statcom to Compensate Variations in Voltage Levels in Distributed Generation Systems
2017
International Journal of Trend in Scientific Research and Development
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
This paper presents a control method for distributed static synchronous compensator (D STATCOM) to alleviate variation of both positive and negative-sequence voltages. ...
A proportional-resonant current with selectively harmonic compensation is realized to control the fundamental current of the D as well as reduce the harmonic current, which could be an advantage in practical ...
The effects of such disturbances are important in terms of economic losses, malfunction of devices connected to the grid and in extreme cases, blackouts. ...
doi:10.31142/ijtsrd5919
fatcat:o7lonzu4tbbc7czyympxlrlwo4
Modeling method of sequence admittance for three-phase voltage source converter under unbalanced grid condition
2018
Journal of Modern Power Systems and Clean Energy
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2018; you can also visit the original URL.
The file type is application/pdf.
The admittance is a strong tool for stability analysis and assessment of the three-phase voltage source converters (VSCs) especially in grid-connected mode. ...
However, the sequence admittance is hard to calculate when the VSC is operating under unbalanced grid voltage conditions. ...
Acknowledgement This work was supported by National Natural Science Foundation of China (Nos. 51637007, 51507118). ...
doi:10.1007/s40565-018-0399-z
fatcat:siwwvindgjab5pn3abhx4mxwre
Admittance Reshaping Control Methods to Mitigate the Interactions between Inverters and Grid
2019
Energies
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2020; you can also visit the original URL.
The file type is application/pdf.
And the total harmonic distortion of steady-state grid-connected current is reduced to less than 2%. Furthermore, a specific design method of control parameters is depicted. ...
Therefore, the admittance reshaping control methods are proposed to mitigate the interactions between inverters and grid. ...
Conflicts of Interest: The authors declare no conflict of interest. ...
doi:10.3390/en12132457
fatcat:3uu2ccmttfg2bnoojuspia3ksu
Design of a cooperative voltage harmonic compensation strategy for islanded microgrids combining virtual admittance and repetitive controller
2016
2016 IEEE Energy Conversion Congress and Exposition (ECCE)
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2021; you can also visit the original URL.
The file type is application/pdf.
The use of the virtual admittance concept combined with a PI-RES control structure has been previously proposed as a harmonic compensation sharing strategy when multiple DGs operate in parallel. ...
This paper proposes the combined use of virtual admittance control loop and repetitive controller (RC) for harmonic compensation. ...
Therefore, RC is based on the idea of introducing the disturbance (signal) model in the system to track or reject it. ...
doi:10.1109/ecce.2016.7855020
fatcat:2bkbqixgnzd7vicbtqaqhddg6y
Impedance Modeling and Stability Analysis of Three-Phase Four-Wire Inverter with Grid-Connected Operation
2022
Energies
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2022; you can also visit the original URL.
The file type is application/pdf.
In these three-phase four-wire power systems, analyzing the impedance characteristics of the grid-connected inverter is vital to carry out the small-signal stability analysis. ...
Thus, it is vital to consider the influence of the zero-sequence component in addition to the positive-sequence component and the negative-sequence component when it comes to analyzing system stability ...
The models of the three-phase four-wire split capacitor grid-connected inverter system and the three-phase four-leg grid-connected inverter system are established in Typhoon 602 +. ...
doi:10.3390/en15082754
fatcat:kljlvldiuraava5ent4zgisciu
Trends in the Protection of Inverter-Based Microgrids
2019
IET Generation, Transmission & Distribution
Preserved Fulltext
A copy of this work was available on the public web and has been preserved in the Wayback Machine. The capture dates from 2022; you can also visit the original URL.
The file type is application/pdf.
The fault characteristics are rooted in the inverter controllers that can control inverter voltages and currents during the fault period such that they are completely different from the conventional fault ...
The purpose is to provide the current status of microgrid protection and assist in developing new effective solutions to protect these grids. ...
For instance, a dominant zero-sequence current can be measured at a relay located on an IIDG side in a grid-connected microgrid. ...
doi:10.1049/iet-gtd.2019.0808
fatcat:tuvvkgxb6jarxk45yb56pn4lhe
« Previous
Showing results 1 — 15 out of 791 results