Portland State University. Department of Electrical and Computer Engineering
Date of Award
Master of Science (M.S.) in Electrical Engineering
Electrical and Computer Engineering
1 online resource (vi, 114 pages)
Transmission, Voltage, STATCOM, Grid, Electric power system stability, Electric power systems -- Control, Electric power transmission -- Equipment and supplies
This paper investigates the various parameters that effect voltage stability in sub-transmission power networks. The paper first looks at contributions from equipment: generators, transmission lines, transformers, capacitors, SVCs and STATCOMs. The paper also looks at the effects of loads on voltage stability. Power flow solutions, PV and VQ curves are covered. The study models an existing voltage problem i.e., a long, radial, 115 kV sub-transmission network that serves a 65 MW load. The network model is simulated with the following voltage instability countermeasures: adding a capacitor, adding an SVC, adding a STATCOM, tying to a neighboring transmission system, adding generation and bringing in a new 230 kV source. Then, using the WECC heavy-winter 2012 power flow base case and Siemens PTI software, VQ and PV curves are created for each solution. Finally, the curves are analyzed to determine the best solution.
Jones, Peter Gibson, "Evaluation of Voltage Instability Countermeasures in Constrained Sub-transmission Power Networks" (2012). Dissertations and Theses. Paper 112.