Results 91 to 100 of about 512 (127)

Modeling and simulation analysis of Hybrid Bipolar HVDC system based on LCC-HVDC and VSC-HVDC

2018 IEEE 3rd Advanced Information Technology, Electronic and Automation Control Conference (IAEAC), 2018
In recent years, it's mature that the traditional Line Commutated Converter High Voltage Direct Current (LCC-HVDC) in Chinese power system. As power electronic devices become more and more sophisticated and even perfect in practical engineering applications, Voltage Source Converter based on High Voltage Direct Current (VSC-HVDC) has also been applied ...
Shuping Gao, Hangiian Zhu, Baohui Zhang, Guobing Song   +3 more
openaire   +1 more source

Hybrid Commutation Converter in HVDC Systems

Materials Science Forum, 2010
This paper deals with DC – AC static converter systems, of very high voltages and currents, used for electricity power transmission. It has been analyzed three types of converters: with forced commutation, with commutation from load and the solution proposed by the authors. There are shown the advantages in hybrid switching converters, which in essence
Horia Balan, Maria Buzdugan, I. Vadan, E. Simion, P. Karaissas   +4 more
openaire   +1 more source

Improved Hybrid HVDC Circuit Breaker with Power Flow Control Capability for HVDC grids

2020 IEEE Power & Energy Society Innovative Smart Grid Technologies Conference (ISGT), 2020
Power flow control and DC fault protection are two major problems faced by high-voltage direct current (HVDC) grids. The modular multilevel power flow controller (MMPFC) has the bidirectional operation capability of both DC voltage and DC current, which meet the demand for the power flow control.
Jiawei Wu, Yao Liu, Jinyu Xiao, Jinming Hou, Xiaoling Zhao, Guoteng Wang, Xiaodong Li, Zheyang Yu, Zheng Xu 0011   +8 more
openaire   +1 more source

Power Reversal of Hybrid HVDC System

11th IET International Conference on AC and DC Power Transmission, 2015
Hybrid HVDC combines the advantages of line commutated converter (LCC) and modular multilevel converter (MMC). In this paper the topology and basic control strategy of hybrid HVDC are described. Then the power reversal of hybrid HVDC is analysed. For LCC-HMMC (MMC adopting half bridge sub-module), the sequence of power reversal after stopping operation
null Lujie Yu, null Chengyong Zhao, null Jianzhong Xu, null Xiaobo Hu, null Ning An, null Chunyi Guo   +5 more
openaire   +1 more source

Development of hybrid model of B2B HVDC

2017 International Conference on Industrial Engineering, Applications and Manufacturing (ICIEAM), 2017
This paper presents some results of development of model of high voltage direct current system back-to-back link. The model based on concept of hybrid simulation, comprising three level of simulation: physical, analog and digital. The obtained results, including steps on the regulation references, recovery from severe perturbations in two-machine ...
R. A. Ufa, A. S. Vasilev, A. A. Suvorov
openaire   +1 more source

Research on the Protection of Hybrid HVDC System

2018 International Conference on Power Generation Systems and Renewable Energy Technologies (PGSRET), 2018
The traditional and conventional HVDC system has the advantages of lower installing cost and it is a mature state of the art, but it also has some drawbacks like huge reactive power absorption and commutation fault in the system. Similarly, HVDC based on VSC (Voltage Source Converter) is easily operational and flexible in control but it needs high cost
Muhammad Tanveer Riaz, Yang Fan, Jawad Ahmad, Muhammad Zeeshan khan, Muhammad Abbas Khan, Eman Manzoor Ahmed   +5 more
openaire   +1 more source

EMI analysis of hybrid HVDC breaker

2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC), 2016
Hybrid high voltage direct current (HVDC) breaker is one of the most important equipment in DC transmission networks. As it is known, the hybrid breaker consists of large numbers of power electronics devices and the nonlinear elements, so, during the fault occurrence there are many transients voltages and currents with sharp rate of (dv/dt, di/dt ...
Mustafa Alrayah Hassan, Hai Yu, null Song Chi, null Yongjian Li, null Er Ping Li   +4 more
openaire   +1 more source

EMTP modeling of hybrid HVDC breakers

2015 IEEE Power & Energy Society General Meeting, 2015
HVDC meshed systems offer several advantages in front of their HVAC counterparts. However, the lack of fast, low-losses and reliable circuit breaker technology has postponed their implementation. A recently proposed hybrid breaker design can alter this situation.
Juan A. Martinez, Jesper Magnusson
openaire   +1 more source

Power control method on VSC-HVDC in a hybrid multi-infeed HVDC system

2012 IEEE Power and Energy Society General Meeting, 2012
Multi-infeed HVDC (MIDC) system connected with VSC-HVDC links and LCC-HVDC links is a new structure in modern power systems, which can be called hybrid multi-infeed HVDC (HMIDC) system. The paper presents the voltage stability analysis of a HMIDC system modeled from a possible future Danish power system and proposes a power control method to improve ...
Liu, Yan, Chen, Zhe; id_orcid 0000-0002-2919-4481   +1 more
openaire   +3 more sources

Sequential auto-reclosing method for hybrid HVDC breaker in VSC HVDC links

2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC), 2016
Voltage source converters (VSC) are increasingly being used in high voltage direct current (HVDC) systems and with higher power ratings of these converters, the interest for usage with long transmission system is also increasing. With long overhead transmission dc links, many faults would be transient or temporary in nature.
K Vinothkumar, Inger Segerqvist, Niclas Johannesson, Arman Hassanpoor   +3 more
openaire   +1 more source