Results 11 to 20 of about 613,249 (208)

Modeling and Analysis of Transient Overvoltage of Direct Drive Wind Turbine Under Symmetrical Faults

Zhongguo dianli
Large-scale wind power bases typically adopt UHVAC/UHVDC transmission systems for power export, with weak grid strength in the collection area. After short-circuit faults, transient overvoltage issues are prone to occur, making it urgent to study the ...
Hongbo LUO, Shiyao QIN, Zixuan GUO, Guanghui LI   +3 more
doaj   +2 more sources

Transient Overvoltage Security Region and Overvoltage Comprehensive Suppression Method for the Entire Fault Process in Renewable Energy Collection System Under Asymmetric Fault

Energies
During the asymmetric short-circuit period and the fault recovery stage of the renewable energy collection system, the non-fault phase and the PCC point show transient overvoltage characteristics, respectively, which threaten the safe and stable ...
Biyang Wang, Jieyi Chen, Shirui Liu, Nan Xia, Lei Luo   +4 more
doaj   +2 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   +2 more sources

Suppression of transient overvoltage in renewable energy transmission terminal by grid-forming based reactive power compensation

电力工程技术
Line commutated converter based high voltage direct current (LCC-HVDC) is the key to large-scale grid connection and long-distance transmission of renewable energy. However, faults such as DC blocking and commutation failure may lead to short-term excess
SHANG Lei, TANG Wangqianyun, SU Shi, ZHANG Gaomin, TANG Xiaoqian, HUA Zhuhu   +5 more
doaj   +2 more sources

Transient overvoltage on overhead metal return lines of ±500 kV MMC-HVDC grid

The Journal of Engineering, 2018
The ±500 kV half-bridge modular multilevel converter-high-voltage DC (MMC-HVDC) grid project with overhead transmission line is under construction in China at present.
Huiwen He, Xiaolan Li, Ying Lou, Lei Wang, Peihong Zhou   +4 more
doaj   +2 more sources

Coordinated Optimization of Multiple Reactive Power Sources for Transient Overvoltage Suppression for New Energy Sending-Out System

Inventions
With the implementation of China’s “dual carbon” strategy, the installed capacity of new energy has grown rapidly. Wind power and photovoltaic power have accounted for more than 40%, but the integration of power electronic apparatus into the grid has ...
Qinglei Zhang, Lei Luo, Xiaoping Wang, Dehai Zhang, Haibo Li, Zongxiang Lu, Ying Qiao   +6 more
doaj   +2 more sources

Transient overvoltage and its effect on a substation [PDF]

, 2019
We seem to have problems with power industry nowadays. It often faces unforeseen overvoltages in the system. But what does overvoltage mean? Overvoltage is associated with the electric field strength, namely with its increase. Overvoltage happens when the electric field strength reaches a value that is dangerous for the insulation state.
Laznevoy, A., Bashlak, Iryna Anatoliivna
openaire   +2 more sources

A novel embedded voltage‐clamped circuit for multilevel modular converters submodule to suppress very fast transient overvoltage

High Voltage
The submodule in multilevel modular converters experiences a very fast transient overvoltage (VFTO) during switch operation of gas‐insulated switchgear, which also results in overvoltage on power devices, such as thyristors and insulated gate bipolar ...
Hong Shen, Zhonghao Dongye, Mian Xiao, Jiayi Shao, Xiangyu Zhang, Yao Yao, Zifan Dong, Lei Qi   +7 more
doaj   +2 more sources

Adaptive transient overvoltage control strategy for wind farm based on data‐driven method

IET Electric Power Applications
To achieve the transient overvoltage suppression of doubly fed induction generator (DFIG) terminals and the point of common coupling (PCC) in the wind farm (WF), an adaptive overvoltage control strategy based on data‐driven approach is proposed. Firstly,
Xiaofei Liu, Pei Zhang
doaj   +2 more sources

Transformation of Transient Overvoltages by Inductive Voltage Transformers [PDF]

Sensors, 2021
Overvoltage transients occur after any type of switching activity in a power network, such as breaker operation, fault occurrence/clearance and rapid load change. This distortion of voltage is transformed to the secondary circuit of a voltage transformer. The maximum values of such impulses may many times exceed the rated value of its secondary voltage.
Michal Kaczmarek, Dariusz Brodecki
openaire   +4 more sources