An ANN-based distance protective relays of transmission lines

2001 ◽  
Author(s):  
Y.I. Li
Keyword(s):  
Transmission Lines ◽  
Protective Relays

scholarly journals ANALYSIS OF GEOMAGNETICALLY INDUCED CURRENT IN POWER GRID DURING GEOMAGNETIC STORM

2020 ◽  
Vol 5 (8) ◽  
Author(s):  
Smit Anjana ◽  
Mihir Patel
Keyword(s):  
Power System ◽  
Transmission Lines ◽  
Geomagnetic Storms ◽  
Risk Mitigation ◽  
Power Grid ◽  
Activity Level ◽  
System Level ◽  
Half Cycle ◽  
Solar Storms ◽  
Protective Relays

Solar storms are event that has a big range of averse outcome on technological system, power grid specifically. During extreme geomagnetic storms a GIC begin to travel between long transmission lines or conducting constructions. The possibility of solar storms features an approximately linear relation with the sun spot activity level that fluctuates in eleven years cycle. This paper could be threat examination of GIC in power system and describe the causes, the implications, each on power system apparatus level and on power system level. When GIC flow in neutral of transformer winding it start to causes the Half-cycle core saturation and produce high level of harmonics can sense bad fault situation to protective relays and mis-operation of circuit breakers. Also this paper mentioned potential risk mitigation ways

scholarly journals IEC 61850-Based Communication Networks of Distribution System against Cyber and Physical Failures

2021 ◽  
Vol 12 (3) ◽  
pp. 155
Author(s):  
Nevin Fawzy ◽  
Hany F. Habib ◽  
Osama Mohammed
Keyword(s):  
Communication Networks ◽  
Transmission Lines ◽  
Distribution System ◽  
Distribution Systems ◽  
System Model ◽  
Complete Protection ◽  
Iec 61850 ◽  
Control Approach ◽  
Protection Scheme ◽  
Protective Relays

This paper proposes a decentralized control approach using a co-simulation platform to monitor protective elements and provide complete protection scheme for distribution systems. Real time measurements are obtained by interfacing the system model in RSCAD/RTDS with SEL 421 protective relays and publish/subscribe the voltage and current signals of the buses and transmission lines based on IEC 61850 communication protocol to isolate the fault correctly. The proposed technique helps to identify the location of the fault and introduces primary and buck protection for the system. The communication networks assists in facing cyber and physical threats and finding a new path for healthy relays to remove faults from the system. This technique is investigated on an IEEE 14 bus system for all possible fault locations. The proposed scheme can clear the fault by isolating the minimum part of the system and improving the endurance of the power in it. The system shows the smooth information flow between the cyber and physical parts to isolate faults in it in different cases.

Phasor-based fault location challenges and solutions for transmission lines equipped with high-speed time-domain protective relays

2020 ◽  
Vol 189 ◽  
pp. 106617
Author(s):  
Felipe V. Lopes ◽  
Eduardo Jorge S. Leite ◽  
João Paulo G. Ribeiro ◽  
Artur B. Piardi ◽  
Renzo G. Fabián Espinoza ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Time Domain ◽  
High Speed ◽  
Fault Location ◽  
Protective Relays
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