Methodology for the adjustment of the function of the unbalanced load loss protection - negative ansi 46 sequence of a SIEMENS 7UM62 relay synchronous generator
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This paper presents the theory and methodology for the adjustment of the negative sequence current protection function (PDF) ANSI 46 of a synchronous generator with poles and poles, for a multifunctional relay SIEMENS 7UM62 that uses for its logic of decision the curve of time of heating allowed of the machine before the increase of the magnitude of negative sequence Also the consequences and the damages that can be caused by the excess of current of negative sequence circulating by the stator of the generator are explained.
In addition, its functional diagram is illustrated by identifying its input signals: data (settings), analog and binary signals; It also describes in detail its decision process and exit signals. This logical diagram was divided into 3 sub-diagrams to identify the causes that originate their outputs: alarms, startup, firing or blocking, this way of illustrating the process by stages allows greater clarity, since the explanation process is more didactic than the one presented by the manufacturer in the manual.
As an example of an illustration, the calculations of the adjustment criteria of the ANSI 46 PDF applied to a
salient pole generator from Unit 1 of the Salvajina Hydroelectric Plant are presented in detail. This protection function protects the machine by heating load imbalance and asymmetric faults.
IEEE. Std C50.13 ™ -2014, IEEE Standard for Cylindrical-Rotor 50 Hz and 60 Hz Synchronous Generators Rated 10 MVA and Above, NY (USA); 2014. Available at: 10.1109 / IEEESTD.2014.6811137
The power engineering education committee. Power system relaying committee. IEEE tutorial on the protection of synchronous generators. Pages 57-61, second edition. NY (USA); 2011. Available at: https://es.scribd.com/document/52342402/Z-Proteccion-de-Generadores-IEEE
IEEE. Std C37.102 ™ -2006, IEEE Guide for AC Generator Protection. NY (USA); 2006. Available at:https://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4109950
Multifunctional Protection of Machines 7UM62. SIPROTEC. Manual. V4.8 2013. Available in:
https://www.downloads.siemens.com/download- center/Download.aspx?pos=download&fct=getasset&id1=DLA06_3361
IEEE. Std C50.12 ™ -2005, IEEE Standard for Salient-Pole 50 Hz and 60 Hz Synchronous Generators and Generator / Motors for Hydraulic Turbine Applications Rated 5 MVA and Above. NY (USA); 2005. Available in: 10.1109 / IEEESTD.2006.99082
Lozano Herrera JC, Ortegón Henao JD. Adjustment criteria siemens multifunction relay 7UM622 Amaime generation plant. Valle del Cauca: Universidad del Valle; 2013. Available at: http://bibliotecadigital.univalle.edu.co/bitstream/10893/8057/1/CB-0495174.pdf
Spain Gaviria CE. Teaching material of five functions of protection of the Relay 7UM62 of SIEMENS. Undergraduate thesis in Electrical Engineering. Cali- Valle del Cauca: Universidad del Valle; 2017. Available at: http://bibliotecadigital.univalle.edu.co/bitstream/10893/8057/1/CB-0495174.pdf
Generation Management Energy Company of the Pacific SA. EPSA-CELSIA. "Update of coordination study of protections CH Salvajina U1, Cali (CO); 2017. Available at: http://www.celsia.com/Portals/0/Documentos/PDF/salvajina-avanza/boletin-salvajina-007.pdf5.
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