Overcurrent protection adjustment when connecting synchronous generation to power supply systems

Author

Samoylenko, Vladislav O. ; Korkunova, Olga L. ; Pazderin, Andrew V. ; Novikov, Nicolas N.

Author_Institution

Dept. of Automated Electr. Syst., Ural Fed. Univ., Yekaterinburg, Russia

fYear

2015

fDate

17-19 March 2015

Firstpage

2368

Lastpage

2373

Abstract

The paper is devoted to the features of short-circuit current interruption under the conditions of small-scale distributed synchronous generation connection to medium voltage (MV) and low voltage (LV) power supply systems. Distributed generation (DG) even in a case of the unidirectional power supply has a great impact on overcurrent relay protection sensitivity and selectivity. Connecting DG leads to the specific character of short-circuit currents (SSC) of power supply systems, including increased level of short-circuit currents, current attenuation and the rate of aperiodic and periodic components. The paper also considers selection of setting values of specified time depending upon switchgear performance and the possibility of relay protection coordination for a generator and adjacent grid components.

Keywords

distributed power generation; overcurrent protection; distributed generation; low voltage power supply system; medium voltage power supply system; overcurrent relay protection selectivity; overcurrent relay protection sensitivity; power supply system; short-circuit current interruption; small-scale distributed synchronous generation connection; unidirectional power supply; Attenuation; Generators; Power supplies; Protective relaying; Sensitivity; Short-circuit currents; Transient analysis; distributed generation; microgrids; power supply; relay protection; short-circuit; switchgear;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Technology (ICIT), 2015 IEEE International Conference on

Conference_Location

Seville

Type

conf

DOI

10.1109/ICIT.2015.7125447

Filename

7125447