Results 61 to 70 of about 763 (183)

Simulation, Design, and Test of a Dual-Differential D-Dot Overvoltage Sensor Based on the Field-Circuit Coupling Method

Sensors, 2019
Accurate measurement of overvoltage in power grids is of great significance to study the characteristics of overvoltage and design of insulation coordination.
Pengcheng Zhao, Jingang Wang, Qian Wang, Qianbo Xiao, Ruiqiang Zhang, Shucheng Ou, Yaqin Tao   +6 more
doaj   +1 more source

Influence of High-voltage Transformer on Electric Locomotive Passing the Neutral Section

机车电传动, 2015
Based on the typical manner of electric locomotive passing the neutral section, equivalent circuit model was established of the three kinds of voltage transformer according to electromagnetic induction, the resistance partial pressure and capacitance ...
MA Tan, XU Yan
doaj  

Overvoltage Suppression Strategy for VSG-Based DFIGs Under Commutation Failures of HVDC Transmission Systems

Energies
Virtual synchronous generator (VSG) control, which can provide inertia output, damp power oscillations, and offer frequency and voltage support to power grids, has become a growing trend in the control field of wind power generation. As a new technology,
Shuyi Wang, Qicai Wang, Zhijie Zeng, Wei Jiang, Jinyu Chen, Zhijun Wang   +5 more
doaj   +1 more source

Modelling and identification for reduction of overvoltage transients

IEE Proceedings - Electric Power Applications, 2003
The main problems that appear when using a long cable connection between a Variable Frequency Drive (VFD) and the AC motor are over-voltages and bearing currents. The last one concerns especially EMC, while the over-voltage transients can be fatal to the motor.
Capitaneanu, Stefan, de Fornel, Bernard, Fadel, Maurice, Jadot, Fabrice, Malrait, François   +4 more
openaire   +2 more sources

Covered conductor burn-down prevention for distribution line in Indonesia

MATEC Web of Conferences, 2018
Covered conductor (CC) is used to resolve temporary line to ground fault in the distribution line. However, some cases of CC burn down were found in Indonesia.
Pramana Putu Agus Aditya, Kusuma Aristo Adi, Munir Buyung Sofiarto, Tambunan Handrea Bernando   +3 more
doaj   +1 more source

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   +1 more source

A multi-stage DC current control strategy for suppressing transient overvoltage of LCC-HVDC sending end grid

International Journal of Electrical Power & Energy Systems
The fast DC current recovery is widely adopted in the existing Voltage Dependent Current Order Limiter (VDCOL) for Line Commutated Converter-based High Voltage Direct Current (LCC-HVDC) systems to mitigate transient overvoltage in the sending-end grid ...
Bo Pang, Yi Tang, Quanwang Zhang, Kai Liao, Jianwei Yang, Sheng Lin, Zhengyou He   +6 more
doaj   +1 more source

Overvoltage ride through control strategy for improving voltage support capability of virtual synchronous generator

IET Generation, Transmission & Distribution
As the application of renewable energy sources continues to increase, the virtual synchronous generator (VSG) has been proposed and received widespread attention.
Xinmin Zhao, Haibo Zhang, Joseph Ndonji, Weiyong Jiang, Kai Li   +4 more
doaj   +1 more source

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   +1 more source

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   +1 more source