Results 61 to 70 of about 36,514 (225)

Design and implementation of passive impedance adapter to damp resonances between VSC‐HVDC and AC systems

IET Generation, Transmission & Distribution
It has been known that resonances often occur when high‐voltage direct current (HVDC) systems are connected into the AC system via voltage‐source converters (VSCs).
Changyue Zou, Junjie Feng, Xiaobin Zhao, Yi Yuan, Ting Hou   +4 more
doaj   +1 more source

Heat Transfer Process of HVDC Submarine Cables under Transient Load

Zhongguo dianli, 2020
High-voltage direct current (HVDC) XLPE submarine cable is an important carrier for long-distance and large-capacity power transmission. The HVDC submarine cable load affects temperature distribution, while the temperature has an important influence on ...
Zhengbo LIANG, Lijun LI, Chao PENG, Mingzhong XU, Weijia ZHAO, Lei WANG   +5 more
doaj   +1 more source

Development of Cooling Performance Evaluation System for Semiconductor Device in High Voltage Direct Current Converter [PDF]

한국정밀공학회지, 2020
The high voltage direct current (HVDC) device has been used to transmit electrical power with an advanced technology of semiconductors. The sustainable energy generation technologies of solar power and windmills are demanding that the HVDCs have high ...
Jaemun Choi, Jaehyun Park, Heesung Park
doaj   +1 more source

Control of MTDC Transmission Systems under Local Information [PDF]

, 2014
High-voltage direct current (HVDC) is a commonly used technology for long-distance electric power transmission, mainly due to its low resistive losses.
Andreasson, Martin, Dimarogonas, Dimos V., Johansson, Karl H., Sandberg, Henrik   +3 more
core   +2 more sources

Flexible CSC‐HVDC system

The Journal of Engineering, 2019
The current source converter (CSC)‐HVDC system is the key technology for long distance large power transmission. However, the traditional CSC‐HVDC has two serious shortcomings: (i) vulnerable to commutation failures; and (ii) not being able to control its reactive power.
Haitao Wu, Yonghe Liu, Zhihe Wang, Lei Song, Fan Wu   +4 more
openaire   +2 more sources

Micro Partial Discharge Characteristics of SF6 Under DC Voltage

High Voltage, EarlyView.
ABSTRACT In gas‐insulated high‐voltage direct current (HVDC) devices, micro partial discharges (PD) caused by micro‐protrusions or surface roughness on conductors or enclosures may not cause immediate insulation system failure due to their weak discharge intensity.
Geng Chen, Jie Wang, Chuanyang Li, Cong Wang, Youping Tu   +4 more
wiley   +1 more source

The electromagnetic transient simulation acceleration algorithm based on delay mitigation of dynamic critical paths

Energy Informatics
The task scheduling problem based on directed acyclic graphs (DAGs) has been proven to be NP-complete in general cases or under certain restrictions.
Qi Guo, Yuanhong Lu, Jie Zhang, Jingyue Zhang, Libin Huang, Haiping Guo, Tianyu Guo, Liang Tu   +7 more
doaj   +1 more source

Valve-Side Single-Phase-to-Ground Fault Clearance in Bipolar Hybrid-MMC HVDC Systems Utilizing Thyristor Commutation Branches and Mechanical Interrupter

IEEE Access
The Hybrid Modular Multilevel Converter (HMMC) topology—comprising full-bridge (FB) and half-bridge (HB) submodules—is effective for DC fault clearance in HVDC systems.
Muhammad Usman, Il Kwon, Bang-Wook Lee
doaj   +1 more source

Topology assessment for 3 + 3 terminal offshore DC grid considering DC fault management [PDF]

, 2014
Peer ...
Jovcic, Dragan, Nguefeu, S., Taherbaneh, Mohsen, Taisne, J.P.   +3 more
core   +1 more source

Construction and Application of Online Vibration Frequency Response Analysis Method for Converter Transformer Winding

High Voltage, EarlyView.
ABSTRACT The harmonic current and vibration of a converter transformer are effective pieces of information for detecting mechanical faults in the winding. In this paper, the ratio of vibration acceleration to the current squared is defined as the vibration frequency response function (VFRF) of the winding, and then, a novel online vibration frequency ...
Shuyu Wu, Fan Zhang, Shengchang Ji
wiley   +1 more source