Results 11 to 20 of about 12,628 (221)

Simulation and Protection of Reignition Overvoltage in Wind Farm Considering Microscopic Dielectric Recovery Process of Vacuum Circuit Breaker

Energies, 2023
The high amplitude and steep overvoltage generated by the breaking of the vacuum circuit breaker in the wind farm damages the inter-turn insulation of the transformer.
Ziheng Pu, Hao Liu, Yaoqiang Wang, Xinyun Yu, Tian Wu   +4 more
doaj   +3 more sources

A Fault Protection Method for Avoiding Overvoltage in Symmetrical Monopole HVDC Systems by Half-Bridge MMC

IEEE Access, 2021
It is known that the pole-to-ground fault in the symmetrical monopole HVDC transmission system causes overvoltage in the non-faulted pole. The overvoltage increases the required insulation level of the converters and transmission lines.
Kenichiro Sano, Hiro Nakayama
doaj   +3 more sources

A Review of Current Issues in State-of-Art of Wind Farm Overvoltage Protection

Energies, 2011
This paper elaborates on several important outstanding issues in the state-of-art of overvoltage protection selection for modern wind farms. The lack of experience with this still-new technology, together with the inherent complexity of wind farm ...
Ranko Goić, Petar Sarajčev
doaj   +3 more sources

Lightning Overvoltage Protection of Step-Up Transformer Inside a Nacelle of Onshore New-Generation Wind Turbines

Energies, 2021
This paper presents an electromagnetic transient analysis of lightning-initiated overvoltage stresses of the step-up transformers installed inside a nacelle of onshore, multi-megawatt, new-generation wind turbines.
Petar Sarajcev, Antun Meglic, Ranko Goic
doaj   +3 more sources

Study of the Lightning Overvoltage Protection Effectiveness of High Voltage Mixed Overhead Cable Power Lines

Energies, 2021
In this paper, the effectiveness of lightning overvoltage protection of cables in high voltage overhead cable lines has been analyzed. Because of the high overvoltage level, the cables are protected by surge arresters and by metallic sheath earthing ...
Rafał Tarko, Jakub Gajdzica, Wiesław Nowak, Waldemar Szpyra   +3 more
doaj   +3 more sources

Dynamic aggregation method for wind farms for overvoltage protection and accuracy stability enhancement

International Journal of Electrical Power & Energy Systems
Existing equivalent methods for permanent-magnet synchronous generator (PMSG) wind farms struggle to precisely simulate dynamic characteristics during overvoltage faults and protection triggering, thereby limiting their applicability in transient ...
Zongzheng Wang, Chenlei Liu, Wei Wang, Tong Zhao, Yifan Liu, Zhijuan Wang, Ying Sun, Xiaolong Wang   +7 more
doaj   +3 more sources

Analysis on Influence Factors of Temporary Overvoltage of Load Rejection Fault of Offshore Wind Power Transmission System of Permanent Magnet Synchronous Generator

发电技术, 2022
In order to evaluate the temporary overvoltage level of the wind power transmission system based on permanent magnet synchronous generator (PMSG) in case of load rejection, it is necessary to clarify the temporary overvoltage characteristics and its ...
YANG Daye, XIANG Zutao, LUO Xuzhi, SONG Ruihua, CHEN Qiyu, SHEN Lin, WANG Xiaotong   +6 more
doaj   +1 more source

Overvoltage Mechanism of 66 kV Submarine Cable Transmission System for Offshore Wind Farm

Zhongguo dianli, 2023
Overvoltage level is the key parameter of the offshore wind power transmission system, which has significant impact on the system design and equipment selection.
Xiaohe WANG, Haichao YANG, Shuang SONG, Yuxin YANG, Gui YIN, Ke WANG   +5 more
doaj   +1 more source

Comparative Simulation Analysis of Selected Medium and High Voltage Surge Protection Devices

Energies, 2022
The aim of the article is to present and analyze the processes occurring as a result of installing a long flashover arrester (LFA) and a multi-chamber arrester (MCA) as overvoltage protection of power networks. The numerical models of LFA and MCA will be
Michał Borecki, Yevhen Kharchenko
doaj   +1 more source

Testing of Selected Surge Protection Devices in the Context of the Possibility of Ensuring the Reliability of Power Grids

Energies, 2023
The paper aims to analyze the parameters of prototypes of new overvoltage protection devices for power grids—a multi-chamber insulator arrester (MCA) and a long flashover arrester (LFA). The article presents the research results on determining the actual
Michał Borecki, Maciej Ciuba
doaj   +1 more source