Abstract
Electrical transmission line can be approached by the second order system with the model of capacitive, inductive, and resistive elements. In the system, the capacitive element is represented by the capacitance value between phases and phase to ground. In the other side, inductance of reactor and phase conductor represent the inductance element, whereas resistance of the phase conductor represents the resistance value of the system. As a second order system, the electrical transmission line is potentially experiencing the resonance phenomena if the natural frequency reaches the 50 Hz operation frequency. This paper explains the study of resonance phenomena in Extra High Voltage (EHV) 500 kV transmission line between two 500 kV Substation in West Java Region by the modeling and simulation. The results show that the transmission line is very vulnerable to the resonance phenomenon which is indicated by the existence of voltage up to 800 kV when this transmission line is not yet energized and causing one of the line arrester broken. The results also show that under the resonance phenomena, single pole auto reclose process is potentially failed. This study is expected to increase the concern for the resonance phenomena in the transmission lines.
Highlights
Substation B is a new 500 kV extra high voltage (EHV) substation which is located between substation A and the substation C
This study focused on electrical resonance phenomena for the EHV Transmission line from Substation A to Substation B which is include the modelling and simulation, and describe the electrical resonance effect on the auto reclose process
The assumptions are the EHV transmission lines from Substation A to Substation B assumed has the horizontal contour the line tower can be modelled as figure 1(b), the effect conductor sagging is neglected, modelling process limited to the EHV transmission line Substation A to Substation B with type pi model, and the last one the transpose effect is included in the model
Summary
Substation B is a new 500 kV extra high voltage (EHV) substation which is located between substation A and the substation C. [3] described the methods to find the capacitance and inductance value for transmission line by the interactions of each phase conductor to the others. They found that both results from finite element analysis and analytical methods are within reasonable agreement to each other. [8] described the process of electrical resonance in the transmission line and how to solve the problem. This study focused on electrical resonance phenomena for the EHV Transmission line from Substation A to Substation B which is include the modelling and simulation, and describe the electrical resonance effect on the auto reclose process
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