Influence of AC System Fault on DC System Control &amp; Protection and Improvement Schemes

Tao, Yonghong

doi:10.24295/cpsstpea.2021.00014

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The modular multilevel converter (MMC) topology was accepted over two-and three-level VSC topologies for the bulk amount of power transfer through HVDC network. The modeling was performed following the guidelines of the CIGRE B4 DC grid guide [16][17][18]. The control and protection of an HVDC network is still a challenging task.…”

Section: Simulation Modelmentioning

confidence: 99%

“…The HHT was applied to find the frequency, energy attenuation coefficient details, and energy of the high-frequency components for the different modes. The comparison study is presented in terms of the time-frequency representations (TFR) obtained by implementing the HHT and SST [17,18]. The TFRs when using the HHT and SST were obtained for the fault scenarios mentioned in Table 2.…”

Section: Comparative Assessment With Existing Techniquesmentioning

confidence: 99%

See 1 more Smart Citation

Fault Detection and VSC-HVDC Network Dynamics Analysis for the Faults in Its Host AC Networks

Rana,

Kishor,

Negi

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

High-voltage direct current (HVDC) transmission is preferred over high-voltage alternating current (HVAC) for long power lines for asynchronous power grid interconnection and high-level renewable energy integration. The control and protection functions associated with HVDC systems help with fast and secure clearance of faults. The control and protection challenges in the embedded HVDC network are of great concern for the stable and secure operation of an HVDC network. The DC fault current may reach an extremely high level in a rather short period because of the low impedance in a DC system, which is dangerous for converters, and disturbances in the AC network directly influence the performance of the HVDC system. Sometimes, faults on the AC side may lead to disconnection or failure of the DC link, causing reliability problems as well as huge economic losses. AC and DC protection solutions are being developed for HVDC systems to enhance their sustainability and reliability. As such, AC and DC faults should be detected and cleared at a faster rate. Therefore, in this article, the feasibility of the synchro-squeezed transform (SST) is analyzed for detection purposes. For more accurate and faster detection, the signal is first decomposed using the empirical mode decomposition (EMD) technique, and then the SST is applied. A discrete Teager energy (DTE) spectrum is obtained with the processed signal, which works as the detection index. The algorithm shows low sampling frequency requirements, with higher efficiency and reliability for the purpose. PSCAD/EMTDC version 4.6 software and MATLAB 2022a software is used for the modeling and simulation.

show abstract

Section: Simulation Modelmentioning

confidence: 99%

Section: Comparative Assessment With Existing Techniquesmentioning

confidence: 99%