Results 11 to 20 of about 667,624 (242)

Overvoltage suppression method for DC microgrid under inter-pole short-circuit fault [PDF]

AIP Advances
Aiming at the problems that the existing methods do not fully consider the influence of fault states and have poor overvoltage suppression effects and irregular voltage waveforms, an overvoltage suppression method for DC microgrids under inter-electrode ...
Xiaobin Cai, Lijun Tang, Jiaquan Yang, Nianrong Zhou   +3 more
doaj   +2 more sources

Power operation region modeling and transient overvoltage suppression strategy of hybrid cascaded HVDC

International Journal of Electrical Power & Energy Systems
The hybrid cascaded HVDC system(HC-HVDC) in sending end system is composed of an Line Commutated Converter(LCC) connected in series with a parallel group of Modular Multilevel Converters (MMC).
Jiangshan Liu, Fengting Li, Chunya Yin, Ruikang Chen, Lu Han, Yingping Shi   +5 more
doaj   +2 more sources

Overvoltage Suppression in Initial Charge Control for DC Capacitor Using Multiple Leg Short-Circuits With SiC-MOSFETs in Power Converters

IEEE Open Journal of Power Electronics, 2023
This article proposes an improved overvoltage suppression method for the initial charge of the dc capacitor in voltage source power converters. The proposed method makes multiple short-circuits in each leg, utilizing power devices in the converter. These
Tomoyuki Mannen, Keiji Wada
doaj   +2 more sources

Application of MMC with Embedded Energy Storage for Overvoltage Suppression and Fault Ride-through Improvement in Series LCC-MMC Hybrid HVDC System

Journal of Modern Power Systems and Clean Energy, 2023
The series line-commutated converter (LCC) and modular multilevel converter (MMC) hybrid high-voltage direct current (HVDC) system provides a more economical and flexible alternative for ultra-HVDC (UHVDC) transmission, which is the so-called Baihetan ...
Xiaodong Li, Zheng Xu, Zheren Zhang
doaj   +2 more sources

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   +2 more sources

Research on fast transient overvoltage suppression measures in 750kV GIS

Journal of Physics: Conference Series
Abstract The isolation switch in gas-insulated switchgear (GIS) will generate rapid transient overvoltage VFTO during opening and closing, which will cause great harm to the GIS itself and adjacent equipment. In order to solve the problem of rapid transient overvoltage in GIS, the electromagnetic transient program (ATP-EMTP) was used to ...
Longyun Jiang
openaire   +2 more sources

Reactive power sensitivity-based novel overvoltage suppression strategy for parallel VSC-and-LCC-HVDC transmission system

International Journal of Electrical Power & Energy Systems
The rapid deployment of both line-commutated converter-based high-voltage direct current (LCC-HVDC) and voltage source converter-based high-voltage direct current (VSC-HVDC) does not only prolificate AC/DC grid coupling but also form new DC transmission ...
Yi Hao, Lujie Yu, Chuanjie Nie, Fengdi Li, Heyu Luo   +4 more
doaj   +2 more sources

Transient AC Overvoltage Suppression Orientated Reactive Power Control of the Wind Turbine in the LCC-HVDC Sending Grid

CES Transactions on Electrical Machines and Systems
High-voltage direct current (HVDC) transmission is a crucial way to solve the reverse distribution of clean energy and loads. The line commutated converter-based HVDC (LCC-HVDC) has become a vital structure for HVDC due to its high technological maturity
Bo Pang, Xiao Jin, Quanwang Zhang, Yi Tang, Kai Liao, Jianwei Yang, Zhengyou He   +6 more
doaj   +2 more sources

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   +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