scholarly journals New Differential Protection Method for Multiterminal HVDC Cable Networks

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3387 ◽  
Author(s):  
Ricardo Granizo Arrabé ◽  
Carlos A. Platero ◽  
Fernando Álvarez Gómez ◽  
Emilio Rebollo López
Keyword(s):  
Power Systems ◽  
Electrical Power ◽  
Differential Protection ◽  
Electrical Power Systems ◽  
High Voltage Direct Current ◽  
Cable Network ◽  
Cable Networks ◽  
Ground Fault ◽  
Protection Method ◽  
Stable Conditions

Ground faults in electrical power systems represent more than 90% of total faults. Their detection, location, and elimination are essential and must be carried out in a precise way to allow multiterminal high-voltage direct current (HVDC) cable networks to operate in stable conditions by removing only the faulty cable from service. This paper presents a new differential protection method based on the measurement of currents at both ends of the shields of power cables. This new method is cheaper and easier to set in operation compared to other protection methods that measure currents circulating in the active conductors. The values of such intensities and their polarities were evaluated to know which cable had a ground fault in a multiterminal HVDC cable network. The method was successfully validated by computer simulations, and experimental results were successfully obtained.

Research on Short-Delay Adaptive Current Protection Scheme for Shipboard Electrical Power Systems

2012 ◽  
Vol 433-440 ◽  
pp. 4159-4164
Author(s):  
Hong Bin Zhen ◽  
Xiao Feng Zhang ◽  
Lian Suo Qi ◽  
Jing Huang
Keyword(s):  
Power Systems ◽  
Electrical Power ◽  
System Capacity ◽  
Electrical Power Systems ◽  
Short Delay ◽  
Protection Scheme ◽  
Protection Method ◽  
On Line ◽  
Line Setting ◽  
Typical Instance

For specific mission and unique configure of Shipboard Electrical Power Systems (SEPS), their relay protection schemes are different from Terrestrial Electrical Power Systems (TEPS). With development of system capacity and network topology, the traditional three-step current protection method can not meet protection demands, which has the feature of off-line setting. Based on the characteristic and requirement of SEPS, a new short-delay adaptive current protection scheme is proposed, which can automatically adjust current settings of short-delay protection on-line according to the system operation state. Simulation results of typical instance verify the feasibility and validity to improve protection performance.

Voltage Quality in Electrical Power Systems

2001 ◽  
Author(s):  
J. Schlabbach ◽  
D. Blume ◽  
T. Stephanblome
Keyword(s):  
Power Systems ◽  
Electrical Power ◽  
Electrical Power Systems ◽  
Voltage Quality

Stability study of electrical power systems modelled with half-order systems

2008 ◽  
Vol 42 (6-8) ◽  
pp. 911-922 ◽  
Author(s):  
Delphine Rui ◽  
Nicolas Retière ◽  
Octavian Entcheanu
Keyword(s):  
Power Systems ◽  
Electrical Power ◽  
Stability Study ◽  
Electrical Power Systems
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