International Journal of Electrical and Electronics Research ISSN 2348-6988 (online) Vol. 10, Issue 3, pp: (10-19), Month: July - September 2022, Available at: www.researchpublish.com
IMPROVING THE EFFICIENCY OF LONGDISTANCE POWER TRANSMISSION SYSTEM USING THYRISTOR CONTROLLED SERIES COMPENSATOR DEVICE Okenna Osmond1, F. U. Iloh2 Department of Electrical and Electronic, Faculty of Engineering, Enugu State University of Science & Technology Enugu State University of Science & Technology Enugu State Nigeria1, 2 DOI: https://doi.org/10.5281/zenodo.7085447
Published Date: 16-September-2022
Abstract: Transmission infrastructure in Nigeria is plagued with weak power wheeling capability. Large amount of electrical power is transmitted over very long distances to load centers through weak transmission lines. This research therefore aims at improving the efficiency of long-distance transmission lines using FACTS devices. To improve on the efficiency of the long-distance transmission line, thyristor-controlled series compensation was used in this work, as the technique offers high efficiency on transmitting line voltage and current. The IEEE 9 Bus Power System was used as a case study. MATLAB software was the tool used in running the network with and without TCSC. The system was simulated and their transient performances were thoroughly analyzed. The load flow simulation was carried out on a faulty IEEE 9 bus system. Figure 4.1 and Table 4.1 show the result of the simulation. Bus 5 was detected to violate the voltage limit of 0.95 < V< 1.05 p.u. having a voltage magnitude of 0. 9488p.u, this indicates that there was power system instability while when the TCSC device is incorporated into the network, the voltage at bus 5 was regulated from 0.9488 p.u. to 1.01 p.u. and other buses that experienced voltage improvement. The result when compared without and with TCSC, shows that total active power Loss without TCSC was 348.6856MW while that with TCSC was 322.53MW. Also, the reactive power loss without and with TCSC was 146.8526MW and 32.96336MW respectively. Therefore, the percentage of power system improvement is 7.5% when TCSC was incorporated. Keywords: Flexibility, Transmission, Electricity, FACTS, Thyristor-Controller, Series, Voltage.
I. INTRODUCTION Quality of service has remained a major topic in the Nigerian power system as everyday final consumers either complain of no power supply or poor quality when supplied. It is no longer news that most of the equipments either at the generation, transmission or distribution section of the power system network are aged, and have contributed mainly to the poor quality of power supplied. Simply replacing all the machines would have been the ideal thing to do, but the cost implication, especially at this economic recession period makes such suggestion practically not possible for now. The application of Flexile AC transmission Systems (FACTS) have been proposed over time to deploy and solve this problem (Leite et al; 2014). This FACTS device for optimizing and enhancing the quality of power supply was first initiated by (Abouzari and Peman, 2012) and are of various types such as the static var compensator, unified power flow controller, Thyristor Controlled Series Compensator
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