Analysis of the equivalent fault characteristics of DC system and its impact on distance protection based on power‐frequency variation

Cai, Dongxiao; Li, Haifeng; Zhu, Xinchi

doi:10.1049/joe.2018.8872

Cited by 2 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although this method is very popular in the case of AC systems, a small value of cable impedance makes its application impractical in DC sys tems [98]. Furthermore, in the course of certain fault transients, power-frequency varia tion impedance (PFVI) can become capacitive in nature, which shrinks the zone of dis tance protection based on PFVI and can create system blackouts [99]. Moreover, unlik AC networks, symmetrical component analysis is applicable to a DC system to evade th impact of fault resistance [20,100].…”

Section: Distance Protectionmentioning

confidence: 99%

“…However, some research that reported the implementation of the distance protection scheme for DC systems basically deals with the evaluation of active impedance. This method is accomplished by injecting an external perturbation of voltage or current signal with specific frequency spectra generated by probe units (a half-bridge or full-bridge inverter embedded with a large capacitor and connected to a power source) [99]. In this type of active distance relaying scheme, the measured voltage and current signal are processed by improved SP techniques (for instance, FFT) and linear regression for the calculation of impedance and fault distance [101].…”

Section: Distance Protectionmentioning

confidence: 99%

See 1 more Smart Citation

A Comprehensive Survey of HVDC Protection System: Fault Analysis, Methodology, Issues, Challenges, and Future Perspective

et al. 2023

View full text Add to dashboard Cite

The extensive application of power transfer through high-voltage direct current (HVDC) transmission links in smart grid scenarios is due to many factors such as high-power transfer efficiency, decoupled interconnection, control of AC networks, reliable and flexible operation, integration of large wind and photovoltaic (PV)-based off-shore and on-shore farms, cost-effectiveness, etc. However, it is vital to focus on many other aspects like control, protection, coordinated operation, and power management to acquire the above benefits and make them feasible in real-time applications. HVDC protection is needed to focus further on innovative and devoted research because the HVDC system is more vulnerable to system faults and changes in operational conditions in comparison to AC transmission because of the adverse effects of low DC-side impedances and sensitive semi-conductor-based integrated power electronics devices. This paper provides a comprehensive review of the techniques proposed in the last three decades for HVDC protection, analyzing the advantages and disadvantages of each method. The review also examines critical findings and assesses future research prospects for the development of HVDC protection, particularly from the perspective of smart-grid-based power systems. The focus of the review is on bridging the gap between existing protection schemes and topology and addressing the associated challenges and issues. The aim is to inform power engineers and researchers about potential research avenues to tackle the challenges in HVDC protection in smart-grid-based power systems.

show abstract