Results 71 to 80 of about 18,021 (222)

Power delivery in multiterminal VSC-HVDC transmission system for offshore wind power applications [PDF]

2010 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT Europe), 2010
This paper deals with one of the challenges in the field of offshore wind power systems: power transmission among the wind farms and the land when there is more than one AC grid to be considered. This case is known in the literature as multiterminal connection. The proposed studies are going to present three strategies in order
da Silva, Rodrigo, Teodorescu, Remus, Rodríguez Cortés, Pedro   +2 more
openaire   +3 more sources

Development of ± 550 kV DC GIS Basin Insulator

High Voltage, EarlyView.
ABSTRACT The basin insulator is a core component of the insulation system for ± 550 kV gas‐insulated switchgear (GIS). This paper, using a finite element method for multi‐physics simulations of electric–thermal coupling, determines a geometry suitable for the industrial production of ± 550 kV GIS basin insulators.
Shaohua Cao, Chengwei Jing, Siqiong Zhang, Zuodong Liang, Zehao Zhang, Fangwei Liang, Yong Yang, Geng Chen, Jinliang He, Chuanyang Li   +9 more
wiley   +1 more source

Multi-terminal HVDC grids with inertia mimicry capability [PDF]

, 2016
The high-voltage multi-terminal dc (MTDC) systems are foreseen to experience an important development in the next years. Currently, they have appeared to be a prevailing technical and economical solution for harvesting offshore wind energy. In this study,
Gharehpetian, Gevorg B., Luna Alloza, Álvaro, Rodríguez Cortés, Pedro, Rouzbehi, Kumars, Zhang, Weiyi   +4 more
core   +2 more sources

A Novel Converter Transformer DAM‐LSTNet Vibration Generation Model for Data Imbalance Identification

High Voltage, EarlyView.
ABSTRACT Converter transformer vibration failures, primarily because of winding and core vibrations, severely impact the safe operation of high voltage direct current (HVDC) systems. These vibrations are influenced by voltage and current, and are transmitted through transformer oil and structural components to the tank. Current numerical models fail to
Peiyu Jiang, Fanghui Yin, Liming Wang
wiley   +1 more source

Coordinated Strategy to Improve Post-Fault Characteristics of Hybrid Multi-Infeed HVDC Transmission System

Energies
The characteristics of the dynamic reactive power demand of a hybrid multi-infeed HVDC transmission system during the post-fault recovery period are analyzed and a coordinated control strategy to improve the fault recovery characteristics of the hybrid ...
Bingjie Jin, Guangjian Zhang, Zuohong Li, Shuxin Luo, Hong Dong, Chu Jin, Jindi Luo, Xinyue Zhang   +7 more
doaj   +1 more source

Research on on-Site Test Method for Flexible HVDC Converter Valve Power Module

南方能源建设, 2019
[Introduction] In flexible HVDC transmission systems, HVDC converter valve power modules and their spares are tested and maintained at regular intervals.
CAI Ming, LIN Huan, LIAO Qiyan, MA Guangfu, CHEN Bing   +4 more
doaj   +1 more source

A Novel AC/DC Power Flow: HVDC-LCC/VSC Inclusion Into the PFPD Bus Admittance Matrix

IEEE Access, 2022
In this paper, the matrix algorithm PFPD is generalized in order to compute the power flow solution of real and large AC/DC transmission networks. In particular, it is demonstrated that the HVDC-VSC/LCC links can be seen from the AC power systems as PV ...
Roberto Benato, Giovanni Gardan
doaj   +1 more source

Deterioration Law of Mechanical Properties of Insulation Pressboard Under Multifield Coupled Ageing

High Voltage, EarlyView.
ABSTRACT Converter transformers can experience progressive deterioration of their oil–pressboard insulation under elevated temperature, combined AC–DC electrical stress and persistent mechanical vibration. This study investigates how mechanical vibration affects the mechanical properties of insulation pressboard and clarifies the associated microscopic
Jiayi Chen, Guan Wang, Zihao Li, Zhongyu Zhao, Kuo Yan, Hongshun Liu   +5 more
wiley   +1 more source

Dynamic analysis of voltage angle droop controlled HVDC systems in curative congestion management scenarios [PDF]

EPJ Web of Conferences, 2019
The integration of the voltage-source converter based high voltage direct current (VSC-HVDC) system makes the set-point of its active power adaptive to the changes in the power flow, and contributes to the curative congestion management.
Zhou Yang, Dalhues Stefan, Häger Ulf
doaj   +1 more source

Impedance-compensated grid synchronisation for extending the stability range of weak grids with voltage source converters [PDF]

, 2016
This paper demonstrates how the range of stable power transfer in weak grids with voltage source converters (VSCs) can be extended by modifying the grid synchronisation mechanism of a conventional synchronous reference frame phase locked loop (PLL).
D'Arco, Salvatore, Molinas Cabrera, Marta, Rodríguez Cortés, Pedro, Suul, Jon Are   +3 more
core   +2 more sources