scholarly journals Wavelet transform as a postprocessing diagnostic tool for fault identifications of high-voltage direct current transmission system

FACETS ◽  
2017 ◽  
Vol 1 (1) ◽  
pp. 17-26 ◽  
Author(s):  
P. Sanjeevikumar ◽  
Frede Blaabjerg
Keyword(s):  
High Voltage ◽  
Direct Current ◽  
Diagnostic Tool ◽  
Simulation Software ◽  
Discrete Wavelet ◽  
Transmission Network ◽  
Hvdc Transmission ◽  
High Voltage Direct Current ◽  
Ground Fault ◽  
Current Transmission

This short communication focuses on exploiting the inherent advantages of discrete wavelet transformation (DWT) as a diagnostic tool for post-processing and for identifying the faults that occur in the standard high-voltage direct-current (HVDC) transmission network. In particular, a set of investigations are developed and examined for single-line-to-ground fault on the generation and on the load side converter, and DC-link fault. For this purpose, a standard 12-pulse line-commutated converter (LCC)-HVDC transmission network along with the DWT algorithm is numerically modeled in the MATLAB/PLECS simulation software. Furthermore, in this paper, a set of designed faulty conditions are predicted using the output of DWT and the results of numerical simulation are presented. Results are in good agreement with expectations to prove that DWT is an effective tool for fault diagnostics.

Some Reflections on the High Voltage Direct Current Transmission

2012 ◽  
Vol 203 ◽  
pp. 355-359
Author(s):  
Peng Fei Xu
Keyword(s):  
High Voltage ◽  
Direct Current ◽  
Hvdc Transmission ◽  
High Voltage Direct Current ◽  
Advantages And Disadvantages ◽  
Current Transmission

In order to make the development and application of HVDC transmission get better, the author discussed the advantages and disadvantages of HVDC transmission in detail, and proposed his own idea on the improvement of HVDC transmission.

scholarly journals Solid-State DC Circuit Breakers and their Comparison in Modular Multilevel Converter Based-HVDC Transmission System

Electronics ◽  
2021 ◽  
Vol 10 (10) ◽  
pp. 1204
Author(s):  
Gul Ahmad Ludin ◽  
Mohammad Amin Amin ◽  
Hidehito Matayoshi ◽  
Shriram S. Rangarajan ◽  
Ashraf M. Hemeida ◽  
...  
Keyword(s):  
Solid State ◽  
High Voltage ◽  
Direct Current ◽  
Circuit Breaker ◽  
Transmission System ◽  
Simulation Software ◽  
Fault Current ◽  
Circuit Breakers ◽  
Hvdc Transmission ◽  
Dc Circuit Breakers

This paper proposes a new and surge-less solid-state direct current (DC) circuit breaker in a high-voltage direct current (HVDC) transmission system to clear the short-circuit fault. The main purpose is the fast interruption and surge-voltage and over-current suppression capability analysis of the breaker during the fault. The breaker is equipped with series insulated-gate bipolar transistor (IGBT) switches to mitigate the stress of high voltage on the switches. Instead of conventional metal oxide varistor (MOV), the resistance–capacitance freewheeling diodes branch is used to bypass the high fault current and repress the over-voltage across the circuit breaker. The topology and different operation modes of the proposed breaker are discussed. In addition, to verify the effectiveness of the proposed circuit breaker, it is compared with two other types of surge-less solid-state DC circuit breakers in terms of surge-voltage and over-current suppression. For this purpose, MATLAB Simulink simulation software is used. The system is designed for the transmission of 20 MW power over a 120 km distance where the voltage of the transmission line is 220 kV. The results show that the fault current is interrupted in a very short time and the surge-voltage and over-current across the proposed breaker are considerably reduced compared to other topologies.

An implementation method for the supervisory control of time-driven systems applied to high-voltage direct current transmission grids

2019 ◽  
Vol 82 ◽  
pp. 97-107
Author(s):  
Miguel Romero-Rodríguez ◽  
Romain Delpoux ◽  
Laurent Piétrac ◽  
Jing Dai ◽  
Abdelkrim Benchaib ◽  
...  
Keyword(s):  
High Voltage ◽  
Direct Current ◽  
Supervisory Control ◽  
Driven Systems ◽  
High Voltage Direct Current ◽  
Current Transmission ◽  
Implementation Method
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