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In this paper, the energy transient response during circuit breaker operation for shunt reactor is simulated. To recreate the energy transient phenomenon which occurs during reactive power switching, modeling for Electro Magnetic Transients Program (EMTP) are well established and analyzed. Following this, methods for improving transient recovery voltage (TRV) during switching of reactive power supply...
In this paper, switching overvoltages are studied on part of 380 kV interconnected network of Central Anatolia of Turkey, which contains six busbars that are interconnected with five different transmission lines of different lengths and geometries. The studies are carried out by an electromagnetic transient software program called PSCAD/EMTDC. Overvoltages that take place due to energizing a line...
Distribution transformers operating in modern system grids or in industrial networks are subjected to many switching transients. They may occur due to routine operations, network reconfigurations or reaction on protection signals. Depending on the network configuration and parameters such events my lead to external overvoltages and result in additional stresses on the insulation system. The paper...
Transformers operating in power networks are exposed to surges occurring during switching operations. Connecting and disconnecting transformers using Vacuum Circuit Breaker (VCB) generate high frequency transients which can result in overstressing the insulation system. ATP/EMTP simulations of transients generated during the operation of a VCB switching were presented in this paper. During simulations...
There are two major switch-on transient phenomena of the capacitor: one is the transient over-voltage and the other is the inrush current. The transients will shorten the lifetime of the capacitor and furthermore they will damage the contactors of the switching device. In this paper, a novel method for mitigating the capacitor switch-on transients is developed. The operation principle of the proposed...
This paper presents the simulation investigation of multi-step back-to-back capacitor bank switching in a 115 kV substation of the Electricity Generating Authority of Thailand in order to observe inrush current, peak oscillating voltage and frequency of transient oscillation. Different cases are simulated such as energization of 24 MVAR back-to-back capacitor banks up to 5-step with and without the...
Electrical power transmission is dominated by overhead line systems at present. This is mainly based on more than hundred years of experience of utilities in running overhead lines. Furthermore, overhead lines have proven their operational reliability and functional assurance. In the past, cables were used in distribution networks in urban areas for the most part with the exception of direct current...
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