Overvoltage

Overvoltage:

Characteristics of Lightning Strokes : The parameters and Characteristics of Lightning Strokes include the amplitude of the currents, the rate of rise, the probability distribution …


Classification of Transmission Lines : Classification of Transmission Lines are usually classified as Lines with no loss or ideal lines, Lines without distortion or distortion less lines Lines with small …


Control of Switching Overvoltage : The Control of Switching Overvoltage and power frequency may be controlled by energization of transmission lines in one or more steps by …


Distortion of Travelling Waves : As a Travelling Waves moves along a line, it suffers both attenuation and distortion. The decrease in the magnitude of …


Insulation Coordination in High Voltage : Insulation Coordination in High Voltage – Electric power supply should ensure reliability and continuity to the utility concerns. Hence, the power …


Insulation Coordination of Substation : For steep fronted lightning waves at Insulation Coordination of Substation and at different points on lines, the voltages at sub-stations may exceed …


Lightning Stroke Definition  | Mechanism of Lightning Strokes: Lightning Stroke Definition explains that when the electric field intensity at some point in the charge concentrated cloud …


Mathematical Model of Lightning Stroke : During the charge formation process, the cloud may be considered to be a non­conductor. Hence, various potentials may be assumed at …


Power Frequency Overvoltages in Power Systems : The Power Frequency Overvoltages occur in large power systems and they are of much concern in EHV systems, i.e. systems …


Rectangular Travelling Wave : Reflection and transmission of a Rectangular Travelling Wave at junction points of unequal impedances in a transmission line are of great importance in …


Selection of Surge Arresters : These are non-linear resistors in series with spark gaps which act as fast switches. A Selection of Surge Arresters or lightning arrester …


Simpson Theory of Lightning : The factors that contribute to the formation or accumulation of charge in the clouds are too many and uncertain. But during thunderstorms, …


Switching Surges in Transmission Line : Till the time when the transmission voltages were about 220 kV and below, over-voltages due to lightning were of very high …


Transmission Line Overvoltage Protection : Transmission Line Overvoltage Protection against natural or lightning overvoltages and minimizing the lightning overvoltages are done by suitable line designs, providing guard …


Transmission of Waves at Transition Points : Whenever there is an abrupt change in the parameters of a transmission line, such as an open circuit or a …


Travelling Waves on Transmission Lines : Any disturbance on a Travelling Waves on Transmission Lines or system such as sudden opening or closing of line, a short …


Updated: May 1, 2020 — 3:54 pm