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Anusree Mandali_Mythesis.pdf (60.08 MB)

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Voltage Regulation Control on a Power System with Static Var Compensator

Mandali, Anusree
http://orcid.org/0000-0002-4126-9378
http://rave.ohiolink.edu/etdc/view?acc_num=csu1504863882578828

Abstract Details

2017, Master of Science in Electrical Engineering, Cleveland State University, Washkewicz College of Engineering.
In this thesis, we develop advance voltage regulation controllers for static var compensator (SVC) in a power system. The control objectives are to address the voltage fluctuation problem and to maintain the steady-state output voltage at a nominal voltage of 120V in North America within ANSI C84.1 limits ( +/- 5% tolerance). Voltage fluctuation is due to load change which causes a voltage drop across the system's impedance. Random load changes and changes in the system network are both disturbances which cause voltage fluctuations and deviation. Voltage disturbances create power quality problems that could possibly lead to stability issues and blackouts. SVC is used to maintain the voltage at a constant level by supplying or absorbing the reactive power to and from the grid. However, in order to achieve high-performance voltage control in terms of shorter settling time and smaller overshoot percentage, an advanced controller has to be developed along with the SVC. In this thesis, a classic active disturbance rejection controller (ADRC) and an alternative ADRC are applied to enhance the performance of the SVC. Some of the general disturbances in power systems are loss or failure of large generators, transmission lines, and transformers, which can be represented by a step disturbance. The voltage flicker caused by a Steel Mill' s arc furnace can be taken as random disturbances. ADRC estimates and compensates both the internal and external disturbances in the system. The classic ADRC is independent of the mathematical model of the power system while the alternative ADRC is constructed based on the partial model information. As a result, alternative ADRC has smaller control effort than classic ADRC. Both classic and alternative ADRCs are simulated and implemented on the power system with SVC. Simulation results verify the effectiveness of the controller despite the presence of step and random disturbances. In addition, we conduct frequency-domain analyses for both ADRC controlled power systems. The frequency responses successfully demonstrate the stability of the power system.
Lili Dong, Ph.D. (Committee Chair)
Hongxing Ye, Ph.D. (Committee Member)
Petru Fodor, Ph.D. (Committee Member)
97 p.
Electrical Engineering
Power system, SVC, ADRC, Alternative ADRC, Voltage flicker

Recommended Citations

Citations

  • Mandali, A. (2017). Voltage Regulation Control on a Power System with Static Var Compensator [Master's thesis, Cleveland State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=csu1504863882578828

    APA Style (7th edition)

  • Mandali, Anusree. Voltage Regulation Control on a Power System with Static Var Compensator. 2017. Cleveland State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=csu1504863882578828.

    MLA Style (8th edition)

  • Mandali, Anusree. "Voltage Regulation Control on a Power System with Static Var Compensator." Master's thesis, Cleveland State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=csu1504863882578828

    Chicago Manual of Style (17th edition)

csu1504863882578828
70
© 2017, all rights reserved.
This open access ETD is published by Cleveland State University and OhioLINK.