Thefaults in the underground cables cause to generatetransients which propagate along power cable as travelling waves. The velocity of generated wave and time taken by a reach source point from fault location enables us calculate distance value.In this paper double endedtravelling based approach is used communication channel designed distance. A circuit-based model developed EMTP-RV software fi...

In this work, it is proposed a comparative evaluation between two protection schemes for synchronous generators against loss of excitation, based on the R-X impedance plane and P-Q power plane. For this, system modeled in EMTP-RV software was used to simulate cases total partial field loss, with different pre-disturbance load conditions generator, considering operation parallel. The results sho...

-This paper describes an alternative STATic synchronous COMpensator (STATCOM), by connecting a number of Gate Turn Off (GTO) thyristor converters in series on the ac side of the system. Each GTO converter forms one ‘link’ of a 1-phase, full-bridge Voltage-Source-Converter (VSC) and is referred to as a ‘Chain Link Converter’ (CLC). Each GTO of a CLS, is switched ‘ON/OFF’ only once per cycle of t...

This work evaluates in detail the protection performance of synchronous generators against unbalanced currents. For this, a simplified power system composed generating unit with smooth poles, connected to remote through step-up transformer and dual circuit transmission line, is modeled EMTP-RV program. The results obtained show how amplitude negative sequence current influenced by type severity...

The article presents the transients analysis of the substation grounding systems and transmission line tower footing resistances which can affect to the back-flashover (BF) or overvoltage across insulator chain in an HV power systems by using EMTP-RV software. The related transient modeling of the grounding systems is based on a transmission line (TL) model with considering the soil ionization....

This study presents the manner in which transient modeling concepts, which are fully analyzed in the referred standards, are implemented, for the purpose of evaluating the Transient Ground Potential Rise (TGPR). This is a phenomenon of 10–100kV voltages with up to 10μs duration on the grounded enclosure of Gas Insulated Substations (GIS), which may cause concern for personnel safety and problem...

High-speed auto-reclosing is used in power system protection schemes to ensure the stability and reliability of the transmission system; leader-follower auto-reclosing is one scheme type that is widely used. However, when a leader-follower reclosing scheme responds to a permanent fault that affects a transmission line in the proximity of a generation plant, the reclosing directly impacts the tu...

Abstract Microgrids (MGs) are characterized by faster dynamics than conventional grid-connected distributions systems. This is in part due to the lack of inertia inverter-interfaced distributed energy resources such as photovoltaic and storage In this context, load considerably affects transient stability performance MGs, especially if disconnected from main grid. The aim paper analyze influenc...

This study presents the manner in which transient modeling concepts, which are fully analyzed in the referred standards, are implemented, for the purpose of evaluating the Transient Ground Potential Rise (TGPR). This is a phenomenon of 10–100kV voltages with up to 10µs duration on the grounded enclosure of Gas Insulated Substations (GIS), which may cause concern for personnel safety and pro...