Results 51 to 60 of about 341 (142)

Closed‐loop input current control strategy based on waveform similarity index for the emerging matrix converters with harmonic injection technique

IET Electric Power Applications, Volume 19, Issue 1, January/December 2025.
This paper introduces the waveform similarity index (WSI), which is an effective index to characterise the input current performance of harmonic injection matrix converter (HIMC). A closed‐loop control strategy is proposed to regulate the WSI difference through multi resonant controllers (RCs), which can fully suppress the effect of inaccurate harmonic
Zhichao Yang, Jiaxing Lei, Bingtuan Gao, Wu Chen   +3 more
wiley   +1 more source

Impact of cellulose degradation on space charge dynamics and dielectric properties of Kraft paper impregnated with ester liquid in comparison with mineral oil

Electrical Materials and Applications, Volume 2, Issue 1, January/December 2025.
The change in conductivity with paper‐ageing could be linked with the change in total amount of charges as well as the electric field distortion. Moreover, the electric field distortion was consistent in ester liquid‐impregnated papers with paper‐ageing while it increased noticeably in mineral oil‐impregnated papers at stage II of ageing.
Abdelrahman M. Alshehawy, Shanika Matharage, Zhongdong Wang   +2 more
wiley   +1 more source

Enhanced constant extinction angle control for subsequent commutation failure in LCC‐HVDC

IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.
The key control factor affecting subsequent commutation failure suppression in line‐commutated converter‐based high‐voltage direct current were identified. Some conclusions from previous literature were corrected, and an adaptive integral parameter adjustment strategy to enhanced control ability and suppress subsequent commutation failure was ...
Hao Li, Xiaohua Li, Benjun Ge, Xiaoyu Sun   +3 more
wiley   +1 more source

Simulation of LCC-MMC HVDC Systems Using Dynamic Phasors

IEEE Access, 2021
This paper proposes a large-signal dynamic phasor (DP) model for the main circuit of the new emerging LCC-MMC HVDC hybrid system. The model is concise and compact, and provides convenient interfaces with the control systems and external electrical ...
Xiaoming Mao, Yu Wen, Liang Wu, Baorong Zhou   +3 more
doaj   +1 more source

State‐of‐the‐art of cybersecurity in the power system: Simulation, detection, mitigation, and research gaps

IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.
This paper presents a review of state‐of‐the‐art of cybersecurity in the power system, reviewing available simulation tools for studying the cybersecurity of the power system, classifying vulnerable components of the power system to cyberattacks, and summarizing the adverse effects of a successful cyberattack on each component in the power system ...
Milad Beikbabaei, Ali Mehrizi‐Sani, Chen‐Ching Liu   +2 more
wiley   +1 more source

Study on overvoltage of hybrid LCC-VSC-HVDC transmission

The Journal of Engineering, 2018
Hybrid line commutation converter-voltage-source converter high-voltage direct current transmission (LCC-VSC-HVDC) power transmission has unique technical advantages, but its overvoltage study is not sufficient at present.
Dizhen Xu, Xiaobin Zhao, Yuxin Lu, Kang Qin, Long Guo   +4 more
doaj   +1 more source

A Physics‐Informed Neural Network‐Based Transient Overvoltage Magnitude Prediction Method for Renewable Energy Stations Under DC Blocking Scenarios

IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.
This paper first derives an analytical expression for the transient overvoltage (TOV) magnitude at critical nodes in the system caused by DC blocking (DCB) faults. Subsequently, an analytical formula is developed to characterize the relationship between the multiple renewable energy stations short circuit ratio (MRSCR) and the transient voltage rise ...
Guangyao Wang, Jun Liu, Jiacheng Liu, Xiaoming Liu, Tao Ding, Xianbo Ke, Chong Ren   +6 more
wiley   +1 more source

Startup Method and Strategy for Bipolar LCC-HVDC System Used as Black-Start Power Source

Zhongguo dianli
The scientific and reasonable black-start scheme is the most effective measure to cope with the power grid blackout, which can greatly accelerate the system recovery process, thus significantly reducing the losses of power system due to power failure ...
Qingwei WANG, Zhibin LIU, Bingqi CHEN, Jikeng LIN   +3 more
doaj   +1 more source

Fault Detection Algorithm for Multi-terminal LCC HVDC Interconnected Grid

IOP Conference Series: Materials Science and Engineering, 2018
The protection of Multi-terminal DC (MTDC) system is not straightforward. This paper proposes a novel protection technique for the proposed configuration topology of interconnection project between Egypt and Saudi Arabia. The proposed scheme depends on the second derivative of dc line current with the time which represents the acceleration of dc ...
M M Eissa, S Hasan, R Mamdouh
openaire   +1 more source

Adaptive Control of Battery Energy Storage Systems for Suppression of Commutation Failures in Multi‐Infeed HVDC System

IET Generation, Transmission &Distribution, Volume 19, Issue 1, January/December 2025.
In order to address the limitations of conventional strategies, this paper proposes a staged reactive power control strategy that employs a combined criterion based on the magnitude of the AC voltage dip and the extinction angle. The proposed strategy enables dynamic adjustment of reactive power during severe AC voltage dips, thereby ensuring voltage ...
Xianbo Ke, Jun Liu
wiley   +1 more source