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A Novel Islanding Detection Technique Based on Positive-Feedback Negative Sequence Current Injection
IEEE transactions on power electronics, 2022This article proposes a new active anti-islanding technique to detect unintentional islanding with high speed and reliability. In grid-connected mode, the controller has no influence on the power system.
Mohammad Bani Shamseh +2 more
semanticscholar +1 more source
IEEE transactions on energy conversion, 2021
Inverter based distributed generators (DGs) are increasingly being employed for interfacing renewable energy sources into the grid. Droop control is a very popular technique for ensuring parallel operation of these sources based on local measurements ...
A. S. Vijay, S. Doolla, M. Chandorkar
semanticscholar +1 more source
Inverter based distributed generators (DGs) are increasingly being employed for interfacing renewable energy sources into the grid. Droop control is a very popular technique for ensuring parallel operation of these sources based on local measurements ...
A. S. Vijay, S. Doolla, M. Chandorkar
semanticscholar +1 more source
IEEE Journal of Emerging and Selected Topics in Power Electronics, 2021
Impedance models of modular multilevel converter (MMC) are required to analyze the stability of the MMC high-voltage direct current (HVDC) system. In practical engineering, the positive–negative sequence separation algorithm is the basis of positive and ...
T. Yin +9 more
semanticscholar +1 more source
Impedance models of modular multilevel converter (MMC) are required to analyze the stability of the MMC high-voltage direct current (HVDC) system. In practical engineering, the positive–negative sequence separation algorithm is the basis of positive and ...
T. Yin +9 more
semanticscholar +1 more source
Unbalanced Source Detection in Power Distribution Networks by Negative Sequence Apparent Powers
IEEE Transactions on Power Delivery, 2021Distribution network unbalanced operation is among crucial power quality concerns. Detecting the unbalance sources and their contribution to the network total unbalance with high precision is a prerequisite to alleviate this challenge.
Amin Dadashzade +2 more
semanticscholar +1 more source
IEEE Transactions on Power Delivery, 2021
Owing to poor overcurrent capacity and high controllability, inverter-interfaced renewable energy power plants (IIREPPs) exhibit exclusive fault characteristics, which are different from those of conventional synchronous sources.
Yingyu Liang, Wulin Li, Zhengjie Lu
semanticscholar +1 more source
Owing to poor overcurrent capacity and high controllability, inverter-interfaced renewable energy power plants (IIREPPs) exhibit exclusive fault characteristics, which are different from those of conventional synchronous sources.
Yingyu Liang, Wulin Li, Zhengjie Lu
semanticscholar +1 more source
Compensation of Negative Sequence Component using sequence parameters
2014 International Conference on Circuits, Power and Computing Technologies [ICCPCT-2014], 2014Current unbalance is frequently encountered power quality problem. Negative sequence current leads to increase in machine temperature and unnecessary tripping of circuit breakers. Unequal phase current and harmonic current causes increased line losses and skin effect.
T. Paulraj, M. K. Ilampoornan
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Negative priming and sequence learning
European Journal of Cognitive Psychology, 2002Three experiments used a novel sequence learning task, in which participants responded to changes in location of one visual stimulus whilst ignoring another. Experiment 1 demonstrated negative priming effects in this task, in that responses to individual sequence elements were disrupted when the attended stimulus (e.g., red asterisk) appeared at the ...
Josephine J. Cock +2 more
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Negative sequence impedance of converters
IEE Proceedings B Electric Power Applications, 1981The fundamental frequency behaviour of power convertors to unbalanced supply voltages is described in the paper. The model used caters for the effect of variable unbalance, variable firing angle, different firing systems, and the effect of a noninfinite DC reactance. The results are of use for a wide range of applications, such as HVDC and power drives.
R. Yacamini, W.J. Smith
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IEEE Power & Energy Society General Meeting, 2020
This paper focuses on the control of Modular Multilevel Converters (MMC) for High Voltage DC (HVDC) applications during unbalanced AC grid voltage sags where positive and negative sequence voltages are equal. The control scheme is based on six arm energy
E. Prieto‐Araujo +3 more
semanticscholar +1 more source
This paper focuses on the control of Modular Multilevel Converters (MMC) for High Voltage DC (HVDC) applications during unbalanced AC grid voltage sags where positive and negative sequence voltages are equal. The control scheme is based on six arm energy
E. Prieto‐Araujo +3 more
semanticscholar +1 more source
DNA Sequencing With Positive and Negative Errors
Journal of Computational Biology, 1999The problem addressed in this paper is concerned with DNA sequencing by hybridization. An algorithm is proposed that solves a computational phase of this approach in the presence of both positive and negative errors resulting from the hybridization experiment. No a priori knowledge of the nature and source of these errors is required.
J, Błazewicz +4 more
openaire +2 more sources