| Title |
Voltage Stability Analysis Based on Energy Function Considering Tap of Transformer |
| Authors |
이기제(Lee Ki-Je) ; 최병곤(Choi Byoung-Kon) ; 권용준(Kwon Yong-Jun) ; 문영현(Moon Young-Hyun) ; 오용택(Oh Yong-Taek) ; 이병하(Lee Byunn-Ha) |
| Keywords |
에너지함수 ; 전압안정도 ; 변압기 탭 ; 전압붕괴 ; 안정여유도 ; 에너지곡선 ; |
| Abstract |
An energy function is derived on the basis of the EMM(Equivalent Mechanical Model) to take account of the effects of tap changer, and then the VC(Voltage Collapse) criteria is proposed to predict the voltage collapse in Power systems. The VC criterion can be evaluated by using the energy margin given by the energy gap between UEP(Unstable Equilibrium Point) and SEP(Stable Equilibrium Point) of the energy function adopted, in which it is noted that the energy contour should be considered due to energy discontinuity associated with tap changing. This paper shows that the proposed VC criterion improves the accuracy of voltage stability analysis with application to a two-bus sample system. |