F. Landfors, G. Ingestrom, G. Stromberg, S. Chakraborty
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Series Capacitor Made Less - or not at all Sensitive to Increasing Short Circuit Levels
A series capacitor should be protected from over-voltage caused by fault currents in the transmission line. This paper evaluates how the protection of a series capacitor can be made less sensitive to the power system short circuit level. After an introduction, conventional protection principles are briefly discussed. The paper discusses how the evolving power system complicates the dimensioning of the series capacitor protection system. A control system, making the series capacitor less sensitive to the dimensioning parameters, is presented. Results of a simulation study are presented and followed by conclusions .