Fault location on double-circuit transmission line with series capacitor compensation at both ends

2014 ◽  
Author(s):  
M.M. Saha ◽  
P. Pierz ◽  
E. Rosolowski ◽  
J. Izykowski ◽  
P. Balcerek
Keyword(s):  
Transmission Line ◽  
Fault Location ◽  
Series Capacitor Compensation ◽  
Series Capacitor

Optimal Series Capacitor Compensation for Transmission Lines

2019 ◽  
Vol 16 (8) ◽  
pp. 3455-3460
Author(s):  
Chun Lim Hiew ◽  
Jacqueline Lukose
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Voltage Stability ◽  
Optimization Technique ◽  
Stability Index ◽  
Test System ◽  
Total Power ◽  
Voltage Profile ◽  
Series Capacitor Compensation ◽  
Series Capacitor

Nowadays, voltage stability issues are the main problems around the world and therefore it is important that to maintain stable voltage stability. Series capacitor compensation plays an important role in the transmission line because it can improve the voltage stability as compared to shunt compensation. The Thyristor-Controlled Series Capacitor (TCSC) is selected in this project for providing capacitor compensation because its ability to control the amount of compensation in the transmission line, and operating in three different mode of region, which are resonance, capacitive, and inductive regions. The Fast Voltage Stability Index (FVSI) is used to determine the system’s stability and determine the weakest line in the system for TCSC placement. The TCSC sizing is optimized by using Differential Evolution (DE) optimization technique. All these processes are simulated on Institute of Electrical and Electronics Engineer (IEEE) 14-bus test system by using MATLAB. The proposed methodology was carried out in few tests, which are system contingency test, line outage test, power loss test, voltage profile improvement test and variable TCSC location. Based on the results, the overall voltage stability of the system was improved. The voltage magnitude for each bus had improved and the total power losses also reduced. Therefore, the optimization is successful and the study’s aim is achieved.

scholarly journals Combined DFT and Fuzzy Based Faulty Phase Selection and Classification in a Series Compensated Transmission Line

2019 ◽  
Vol 2019 ◽  
pp. 1-18 ◽  
Author(s):  
Praveen Kumar Mishra ◽  
Anamika Yadav
Keyword(s):  
Transmission Line ◽  
Fault Location ◽  
Fault Classification ◽  
Testing Time ◽  
Heavy Load ◽  
Phase Selection ◽  
Protection Scheme ◽  
Fault Resistance ◽  
Zero Sequence ◽  
Series Capacitor

The conventional distance protection scheme malfunctions sometimes in case of a fixed series capacitor compensated transmission line due to the change in relaying impedance of the protected line during faulty conditions. In order to mitigate this problem, a combined discrete Fourier transform and fuzzy (CDFTF) based algorithm has been proposed in this paper. This method has been tested on a 400 km, 735 kV series compensated transmission line network and WSCC 3-machine 9-bus system for all fault types using MATLAB/Simulink and PSCAD platforms, respectively. A fixed series capacitor is located at the middle of the protected line. The fundamental components of phase currents, phase voltages, and zero-sequence current are fed as inputs to the proposed scheme. The fault detection, faulty phase selection, and fault classification are achieved within 1/2–1 cycle of power frequency. The proposed CDFTF-based scheme is less complex and is better than other data mining techniques which require huge training and testing time. Test results corroborate the proposed scheme reliability with wide variations in fault location, fault resistance, fault inception angle, evolving faults, compensation level, and heavy load interconnection. The results discussed in this work indicate that the proposed technique is resilient to wide variations in fault and system conditions.

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