Static var compensator simulation for power systems

• Main Author: Gutierrez, Miguel O.
• Format: text
• Language: English
• Published: Animo Repository 2006
• Subjects: Electric power transmission; Electric power system stability; Electric power systems; Engineering
• Online Access: https://animorepository.dlsu.edu.ph/etd_masteral/3448; https://animorepository.dlsu.edu.ph/context/etd_masteral/article/10286/viewcontent/CDTG004198_P.pdf
• Institution: De La Salle University

The Electric Power Transmission Trainer(LabVolt), purchased in the early 1980s thru the EDPITAF, by some engineering schools in the Phils. that were offering the Electrical Engineering course, do not have yet experiments in power transmission lines that make use of power electronic devices, like the static var compensator, in regulating the voltage at the receiving-end of a power transmission line. That is why, even up to now, the electric power industry here in the Philippines does not use a static var compensator. As an advancement to experiments on a power transmission line, experiments using a developed laboratory model of a static var compensator can be designed and such can be considered as an upgrade to existing experiments of the LabVolt Electric Power Transmission Trainer. But before one can develop a good and reliable laboratory model, it is best to develop first a circuit model of a power system and simulate its operation using a physical modeling tool. That is why, in this study, a model of a power system circuit with an SVC was simulated using the Sim Power Systems modeling tool. To investigate if the results of the circuit model simulations are reliable, included in this study is a development of a mathematical model of the same power system with an SVC and its operation was simulated using Matlabs Simulink. With these models, i.e., circuit and mathematical models, their simulation results can thus be used in developing a reliable and economic laboratory model of a power system with an SVC. The compensator of the SVC actually consists of a static capacitor in parallel with a linear inductor along with two anti-parallel thyristors. The proper firing angles of the thyristors were determined, i.e., the values that could give the best stability of the receiver-end voltage and firing angle values that can give a minimum voltage drop in the power system. From the results of the circuit model and mathematical model simulations, the proper values of the thyristor firing angles so that the power system is stable were identified which can thus be the basis by students in their performance of power system laboratory experiments using a constructed laboratory model that can be coupled to an existing LabVolt Electric Power Transmission Trainer. i From the results of the simulations, data with and without the SVC were compared and it was found out that the data obtained with the use of the SVC yielded a better voltage regulation or stability of the transmission line. Other experiments like power factor correction in a power system can likewise be simulated using the designed circuit models.