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In this paper, a simple and effective strategy is proposed for the coordination of protective devices in typical radial distribution networks embedding distributed generation units. The proposed strategy benefits from microprocessor-based reclosers and directional elements for feeder relays, and addresses the issues of blinding of protection, false tripping, recloserfuse and fuse-fuse miscoordination,...
The distance relay plays an important role in the protection for transmission lines and application of FACTS devices such as Static Synchronous Compensator (STATCOM) would affect distance relay's performance because of the compensation effect. This paper presents the analytical and simulation results of the application of distance relay for the protection of transmission line containing STATCOM. A...
In this paper, investigations are carried out to explore the impact of a midpoint STATCOM on the coordination between the generator distance phase backup protection (function 21) and the generator capability curve. The results of these investigations have shown that the midpoint STATCOM has an adverse effect on such coordination. Such an impact varies according to the fault type, the fault location...
This paper presents a general approach to locate any type of fault on either a single-circuit or a double-circuit transmission line when only voltage sag data are available. The voltage measurements employed can be from one bus, two buses, or more buses, which are not restricted to those of the faulted section. It is assumed that the network data are available and the fault type is known. Quite encouraging...
A new impedance-based fault location method suitable for radial distribution systems is presented in this paper. The method uses the fundamental phasor components of voltage and current signals available at the distribution substation end only. Considering the unbalanced nature of the distribution network with single-phase and two-phase laterals, and unbalanced loads the fault location algorithm is...
This paper presents a numerical study of the system unbalance effect on system voltage and current calculation during asymmetrical faults. Two different system operational conditions are tested considering a voltage imbalance at the substation bus: balanced system loads and voltage imbalance equal to 3.65% due to system loads. Five fault impedances are simulated. Two fault analysis methods, the symmetrical...
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