Modeling UPFC into Multi-Machine Power Systems
- 156 Downloads
Modeling of unified power flow control (UPFC) into multi-machine power systems by Wang, published by IET, has been widely quoted by many researchers. However, the correctness of the derivation of its equations has not been strictly scrutinized. The model cannot properly represent power system networks in its current form and need to be corrected. In this paper, the model proposed by Wang is revisited and the equations re-derived obtaining different results. The corrected model was developed and tested on three-machine and New England power systems installed with a UPFC. The DC link capacitor voltage is controlled in UPFC by modulating the phase angle of the excitation transformer voltage. The effect of the controller in damping of the low-frequency oscillations is demonstrated by using the proposed correct model and the results are compared with model presented by Wang.
KeywordsPhillips–Heffron model UPFC Low-frequency oscillations
Unable to display preview. Download preview PDF.
- 1.Song, Y.H.; Johns, A.T.: Flexible AC Transmission Systems (FACTS). TJ International Ltd., Padstow (1999)Google Scholar
- 2.Paserba, J.J.: How FACTS controllers benefit AC transmission systems. In: Power Engineering Society General Meeting, 2004, June 6–10, pp. 1257–1262. IEEE, Denver (2004)Google Scholar
- 6.Jazaeri M., Ehsan M., Wang H.F., Johns A.T.: Dynamic interactions of multiple multi-functional UPFC in power systems. Scientia Iranica 9, 346–353 (2002)Google Scholar
- 14.Padiyar K.R.: Power System Dynamics: Stability and Control. Anshan Pub, UK (2004)Google Scholar