Zobrazeno 1 - 10
of 2 035
pro vyhledávání: '"Negative sequence"'
Publikováno v:
Zhejiang dianli, Vol 43, Iss 7, Pp 3-9 (2024)
DL/T 684—2012 Guide of Calculating Settings of Relay Protection for Large Generator Transformer （hereinafter referred to as the “2012 Guide”） has played a significant role in improving the correct operation rate of relay protection devices
Externí odkaz:
https://doaj.org/article/cb573ed22f604d1e99c0c194cff4a907
Autor:
Junjie Hou, Qiangqiang Gao, Yanfang Fan, Guobing Song, Xiaofang Wu, Wentao Yang, Runbin Cao, Faxi Peng
Publikováno v:
International Journal of Electrical Power & Energy Systems, Vol 164, Iss , Pp 110396- (2025)
The flexible DC transmission project of renewable energy has become an inevitable development trend for large-scale renewable energy grid connection. Its two-terminal weak feed AC system is often composed of 100 % power electronic power equipment. Th
Externí odkaz:
https://doaj.org/article/278a033d828c4a1589190f7b89bacfa0
Publikováno v:
International Journal of Electrical Power & Energy Systems, Vol 160, Iss , Pp 110129- (2024)
This paper addresses two complex areas of research: the detection of turn-to-turn faults (TTF) in power transformers and the impact of inverter-based resources on the TTF protection scheme operation. Detecting turn-to-turn faults in power transformer
Externí odkaz:
https://doaj.org/article/88859d5daf2248fe913e9a9794596477
Publikováno v:
Zhejiang dianli, Vol 42, Iss 10, Pp 1-7 (2023)
In case of an asymmetrical fault in PV accessed system， the inverter will simultaneously control the outputs of positive and negative sequence currents. However， there are few studies on inverter fault characteristics considering negative sequenc
Externí odkaz:
https://doaj.org/article/2ff6ca7b5b94424db8598891052cd2ca
Publikováno v:
International Journal of Electrical Power & Energy Systems, Vol 158, Iss , Pp 109965- (2024)
The growing penetration of converter interfaced generation creates unprecedented challenges to protection strategies at all voltage levels. This paper proposes a novel Negative Sequence Current Injection (NSCI)-based active protection scheme for isla
Externí odkaz:
https://doaj.org/article/339f66fbd19f44d5a398243189f31d09
Publikováno v:
Frontiers in Energy Research, Vol 12 (2024)
In a microgrid system where multiple virtual synchronous generators (VSGs) are interconnected through high impedance cables, the total output negative sequence and harmonic current of multiple VSGs cannot be coordinated based on the capacity of each
Externí odkaz:
https://doaj.org/article/9203cb3c012747a88c920c39cf53e2bb
Publikováno v:
CSEE Journal of Power and Energy Systems, Vol 10, Iss 1, Pp 222-234 (2024)
The negative-sequence reactive power-conductance (Q-G) droop control strategy is a conventional method to compensate for the output unbalanced voltages in an islanded MG. Nevertheless, the conflict between unbalanced voltage compen-sation and negativ
Externí odkaz:
https://doaj.org/article/0564c0f4592a4649bf76e345d083a401
Publikováno v:
IEEE Open Journal of Power Electronics, Vol 5, Pp 402-413 (2024)
The accurate control of negative sequence (NS) current distribution among multiple grid-forming (GFM) sources can lower the requirement on NS current capability of the sources. Existing control approaches mainly focus on microgrids (MGs) with fixed p
Externí odkaz:
https://doaj.org/article/33f4ef5834324142b2db124e9331e56d
Publikováno v:
IEEE Access, Vol 12, Pp 39095-39109 (2024)
Three-phase, three-level Vienna rectifiers are widely used in power supplies for the advantages of high power density, low switching voltage stress and low grid side current harmonics. However, due to the presence of positive and negative sequence co
Externí odkaz:
https://doaj.org/article/a04d481cad23482b8d7fa31cce991197
Autor:
Haigang Zhang, Haoqiang Zhou, Decheng Zhao, Song Zeng, Zizhuo Wang, Jianpeng Zhu, Bulai Wang, Jinbai Zou
Publikováno v:
Journal of Engineering and Applied Science, Vol 70, Iss 1, Pp 1-17 (2023)
Abstract For traction substation (TS), the harmonic current spectrum distribution of the left and right power supply sections has a large difference under different EMU operating conditions. This phenomenon will further affect the harmonic distributi
Externí odkaz:
https://doaj.org/article/bdb8926c72e34ef98ea8c63b36adcfec