Open-Circuit Fault in EHV/UHV Transmission System and New Zero Sequence Over-current Protection Scheme

2018 ◽  
Author(s):  
Yadong Liu ◽  
Jiwei Sun ◽  
Guangshun Gong ◽  
Xiaoli Zhang ◽  
lie Zhang
Keyword(s):  
Transmission System ◽  
Open Circuit ◽  
Protection Scheme ◽  
Zero Sequence

Postfault Zero-Sequence Current Injection for Open-Circuit Diode/Switch Failure in Open-End Winding PMSM Machines

2019 ◽  
Vol 66 (7) ◽  
pp. 5124-5132 ◽  
Author(s):  
Bin Zhu ◽  
Cheng Tan ◽  
Mohammad Farshadnia ◽  
John Edward Fletcher
Keyword(s):  
Open Circuit ◽  
Current Injection ◽  
Zero Sequence ◽  
Open End Winding

scholarly journals Renewable energy integrated multi-terminal transmission system using wavelet based protection scheme

2019 ◽  
Vol 10 (2) ◽  
pp. 995
Author(s):  
Savarapu Chandra Sekhar ◽  
G. Ravi Kumar ◽  
S.V.N.L Lalitha
Keyword(s):  
Power Plants ◽  
Satellite Communication ◽  
Research Work ◽  
Fast Response ◽  
Transmission System ◽  
Protection System ◽  
Mother Wavelet ◽  
Protection Scheme ◽  
Distributed Generators ◽  
Protection Systems

The power plants behavior is crucial under faulted conditions and responses on protection systems. Major microgrid (MG) protection problem is the problem between the fault current in utilitygrid mode and microgrid mode. As conventional protection system doesn’t offer solution for all MG protection challenge, but it needs advanced protection strategy. Protection system must response to both the utilitygrid and MG faults. Fast response of protection is necessary as early as possible if the fault is occurs on utilitygrid and if the fault is occurs on MG, the protection scheme must seperate the small possible portion of MG to remove the fault. This work presents a typical MG protection scheme using digital relaying and satellite communication with wavelet detailed D<sub>1</sub>-coefficients of mother wavelet Bior 1.5. This research work is done for the detection, discrimination and locality of faults at distributed generators (DG’s) integration in multi-terminal transmission system. The algorithm tested under various faults with fault inception angles (FIA), fault impedances and fault distance of feeder line.

Synchrophasor-Based Wide Area Protection Scheme for System Stressed Conditions to Avoid Power System Blackout

2019 ◽  
pp. 1-34 ◽  
Author(s):  
Kasimala Venkatanagaraju ◽  
Monalisa Biswal
Keyword(s):  
Power System ◽  
Transmission System ◽  
Area Measurement ◽  
Wide Area ◽  
Stable Operation ◽  
Wide Area Protection ◽  
Large Power ◽  
Wide Area Measurement System ◽  
Protection Scheme ◽  
Protective Relay

Protection of transmission system is crucial for the secured and stable operation of power system. Under stress conditions, the operating parameters of power system violate their limits. From the past anatomy reports of several blackouts, it is clear that equipment, control, and protective relay failures are the major causes behind large power system failure. From study, it is also revealed that failure of back-up protection is more prone during system stressed conditions. In transmission system, third-zone of distance relay is highly affected by system stressed events such as voltage instability and load encroachment. As third-zone protection is a delayed protection scheme, with the help of wide area measurement system better protection function can be provided to reduce future percentage of blackout. In this chapter, a detailed discussion about the existing solutions is provided to mitigate the issue of system stressed conditions and a synchrophasor technology-based approach is provided. Results for different cases are provided to show the efficacy of the proposed method.

scholarly journals Wide Area Information-Based Transmission System Centralized Out-of-Step Protection Scheme

Energies ◽  
2017 ◽  
Vol 10 (5) ◽  
pp. 633 ◽  
Author(s):  
Igor Ivanković ◽  
Igor Kuzle ◽  
Ninoslav Holjevac
Keyword(s):  
Transmission System ◽  
Wide Area ◽  
Protection Scheme

scholarly journals Wavelet-Ann Based Fault Location Identification in Micro Grid Inter Connected Transmission System

2019 ◽  
Vol 8 (3) ◽  
pp. 1320-1324
Keyword(s):  
Transmission Line ◽  
Fault Location ◽  
Threshold Value ◽  
Transmission System ◽  
Solar Pv ◽  
Protection Scheme ◽  
Energy Current ◽  
Cell Sources ◽  
On Line

This paper presents a novel protection scheme for the protection of transmission system with microgrid (MG) having of wind energy, solar PV energy and fuel cell sources. MGs provide environmental, economical benefits for the end consumers, power usages and society. However, transmission line and MGs poses majortechnical challenges. Protection system mustrespond both MG and utility grid failures. Technical challenges of MG protection are to respond to main and MG faults. A MG model is designed and it is connected to a transmission line. Later, for detection and classification of faults wavelet Analysis (WT) is used. Faults are detected by the fault indices and compared with defined threshold value. The location of fault is done by artificial neural networks (ANN) on MG connected transmission system using detailed (D1 ) coefficients of energy current signals. This proposed algorithm is tested and more effective for the detection, classification and location of faults on MG interconnected transmission system. This algorithm is accurate and independent of fault inception angle (FIA), fault impedance and fault distance on line

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