Mass–spring–damper modeling and stability analysis of type-4 wind turbines connected into asymmetrical weak AC grid
Sign Up to like & getrecommendations! Published in 2020 at "Energy Reports"
DOI: 10.1016/j.egyr.2020.11.161
Abstract: Abstract Nowadays, grid codes of various countries have required that grid-connected wind turbines should possess the capability of negative sequence current control during asymmetrical grid condition. As for type-4 wind turbines, however, due to the… read more here.
Keywords: wind; type wind; negative sequence; spring damper ... See more keywords
Hybrid virtual impedance‐based control strategy for DFIG in hybrid wind farm to disperse negative sequence current during network unbalance
Sign Up to like & getrecommendations! Published in 2020 at "Iet Renewable Power Generation"
DOI: 10.1049/iet-rpg.2019.1277
Abstract: When a hybrid wind farm based on doubly fed induction generator (DFIG) and fixed speed induction generator (FSIG) is connected to an unbalanced network, most of the negative sequence current caused by the unbalanced grid… read more here.
Keywords: wind farm; sequence current; hybrid wind; negative sequence ... See more keywords
A New Protection Strategy Based on Negative Sequence Current Coordinated Control on the Generator Extremity
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Access"
DOI: 10.1109/access.2020.3011519
Abstract: When the single-phase reclosing of the high-voltage circuit, there will be tremendous negative sequence current generation. The connection of inverter-type new energy sources may increase the negative sequence current of the power system. The risks… read more here.
Keywords: protection; sequence current; strategy; generator ... See more keywords
A Negative Sequence Admittance Based Algorithm for Identifying Fault Direction in the Presence of Inverter Based Resources
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Access"
DOI: 10.1109/access.2023.3257137
Abstract: Ever increasing integration of renewable resources into contemporary power systems has imposed a unique set of challenges for system protection. Effectiveness of techniques based on conventional system protection theory has long been questionable in protecting… read more here.
Keywords: presence; fault direction; inverter based; based resources ... See more keywords
Negative-Sequence Second-Order Circulating Current Injection for Hybrid MMC Under Over-Modulation Conditions
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Journal of Emerging and Selected Topics in Power Electronics"
DOI: 10.1109/jestpe.2019.2908828
Abstract: Due to the presence of full-bridge submodules (FBSMs), hybrid modular multilevel converters (HMMCs) consisting of FBSMs and half-bridge submodules (HBSMs) can work under the over-modulation conditions, which means that half of the dc voltage is… read more here.
Keywords: modulation conditions; order circulating; sequence second; modulation ... See more keywords
Symmetrical Components Observer for LPMM Back EMF Based on Negative-Sequence Current Injection
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Transactions on Industrial Electronics"
DOI: 10.1109/tie.2021.3060660
Abstract: Thrust force ripple, including no-load detent force and electromagnetic thrust ripple, worsens the precision of the linear permanent magnet machine (LPMM) control system. This article focuses on the elimination of electromagnetic thrust ripple caused by… read more here.
Keywords: back emf; ripple; thrust ripple; symmetrical components ... See more keywords
Negative-Sequence Current Compensation-Based Coordinated Control Strategy for Dual-Cage-Rotor Brushless Doubly Fed Induction Generator Under Unbalanced Grid Conditions
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Transactions on Industrial Electronics"
DOI: 10.1109/tie.2022.3186317
Abstract: In this article, we propose a negative-sequence current compensation-based coordinated control strategy for dual-cage-rotor brushless doubly fed induction generator, where the machine-side converter (MSC) and the grid-side converter (GSC) cooperate to mitigate the imbalance in… read more here.
Keywords: negative sequence; sequence current; control; control strategy ... See more keywords
Impact of Inverter-Based Resources on Negative Sequence Quantities-Based Protection Elements
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Transactions on Power Delivery"
DOI: 10.1109/tpwrd.2020.2978075
Abstract: Inverter-Based Resources (IBRs), including Wind turbine generators (WTGs), exhibit substantially different negative-sequence fault current characteristics compared to synchronous generators (SGs). These differences may cause misoperation of customary negative-sequence-based protective elements set under the assumption of… read more here.
Keywords: protection; based resources; inverter based; sequence ... See more keywords
Determining the Responsibility of Three-Phase Unbalanced Sources Based on RICA
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DOI: 10.3390/en12152849
Abstract: Voltage unbalance is one of the main power quality problems, and the source of many negative effects on utilities that are experienced by customers. In this paper, a method based on robust independent component analysis… read more here.
Keywords: unbalanced sources; voltage; upstream downstream; responsibility ... See more keywords
Earth Fault Location Using Negative Sequence Currents
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DOI: 10.3390/en12193759
Abstract: In this paper, a new method for locating single-phase earth faults on non-effectively earthed medium voltage distribution networks is proposed. The method requires only current measurements and is based on the analysis of the negative… read more here.
Keywords: negative sequence; proposed method; sequence currents; earth fault ... See more keywords