Results 1 to 10 of about 763 (183)

Coordinated preventive control strategy for transient overvoltage suppression in hybrid AC/DC sending-side systems

International Journal of Electrical Power & Energy Systems
As a predominant issue within line-commutated converters-based high voltage direct current (DC) transmission systems, commutation failure may trigger transient overvoltage problems and the tripping of large-scale renewable generation sets in hybrid AC/DC
Boyu Qin, Peicheng Chen, Zhe Zhang, Hongzhen Wang, Tao Ding   +4 more
doaj   +1 more source

Analysis of Overvoltages on Power Transformer Recorded by Transient Overvoltage Monitoring System

, 2020
In this paper, an on-line transient overvoltage monitoring system (TOMS) for power transformers is used for measurement of overvoltages on the transformer bushing tap. The focus of the paper is on the analysis of transient overvoltages caused by lightning strikes recorded at the terminals of power transformer. Several recorded overvoltages are analyzed
Murat, Ivan, Filipović-Grčić, Dalibor, Filipović-Grčić, Božidar, Župan, Alan, Keitoue, Samir, Jurišić, Bruno   +5 more
openaire   +3 more sources

Analytical Analysis of the Mechanism and Mitigation Methods of Transient Overvoltage in Direct-Drive Wind Turbine Generators Connected to Weak Power System

IEEE Access
In regions with extensive wind power collection, the grid’s robustness diminishes, and transient overvoltage phenomena during the restoration phase following an AC short-circuit fault pose significant challenges to secure and stable operation ...
Xu Tian, Shengtao Wu, Luran Wei, Lixin Zhang, Nan Wang, Quan Zheng   +5 more
doaj   +1 more source

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   +1 more source

Coordinated optimization of control parameters for suppressing transient overvoltage in wind power DC transmission systems

Frontiers in Energy Research
With the increasing proportion of new energy in power systems, the instability issues of novel power systems become more prominent. This paper addresses the transient overvoltage problem in wind power DC transmission systems by proposing a method for ...
Jie Zhao, Jinqiu Dou, Ming Li, Fangjie Wu, Xiaolin Shen, Yilin Liang, Lei Shang   +6 more
doaj   +1 more source

Infeasibility Analysis of Half-Wavelength Transmission Systems

Energies, 2018
This paper analyzes the infeasibility of half-wavelength transmission systems in the aspects of power-frequency overvoltage and synchronization stability. The circuit model of the long-distance transmission system is established at first for steady-state
Zheng Xu, Jian Yang, Nengjin Sheng
doaj   +1 more source

Transient Voltage-Reactive Power Modeling of Offshore Wind Power Collection and Transmission System with AC Cables and Characteristic Analysis

Zhongguo dianli, 2022
The transient overvoltage at the sending terminal of the offshore wind power collection and transmission system with AC cables threatens the safe and stable operation of the system.
Yanxia SUN, Shiwen FANG, Zhen LI
doaj   +1 more source

Research on Transient Overvoltage Characteristics and Mapping Relationships of Photovoltaic/PMSG Under Electromagnetic/Electromechanical Models

IET Renewable Power Generation
As the ‘dual carbon’ goals continue to advance in China, the grid‐connected scale of new energy power generation equipment such as wind power and photovoltaic power is constantly increasing.
Shiyun Xu, Shiqi Liu, Shuyan Wang, Jingtian Bi, Tiankai Lan   +4 more
doaj   +1 more source

Research on transient AC overvoltage suppression method of DC sending end based on novel fast-excitation MCR

International Journal of Electrical Power & Energy Systems
The growing reliance on high-power high-voltage direct current (HVDC) transmission systems has intensified challenges associated with transient AC overvoltage induced by commutation failures resulting from converter operation characteristics.
Xiyu Yin, Xiaoyue Chen, Linyu Zhang, Shan Li, Yujie Ding, Rui Song, Chunlai Li   +6 more
doaj   +1 more source

Investigation on overvoltage caused by vacuum circuit breaker switching off shunt reactor in offshore wind farms

High Voltage, 2022
The multiple reignitions of vacuum circuit braker (VCB) while switching off the shunt reactor in an offshore wind farm (OWF) would produce a high overvoltage. The post‐arc process of ion movement in the vacuum interrupter is analysed.
Zhi Zheng, Qiuqin Sun, Jianlan Yang, She Chen, Feng Wang, Lipeng Zhong   +5 more
doaj   +1 more source