Performance Evaluation of a Generator Differential Protection Function for a Numerical Relay


  • K. H. Le The University of Danang - University of Science and Technology, Vietnam
  • P. H. Vu Central Power Corporation - Center Electrical Testing Company Limited, Vietnam
Volume: 9 | Issue: 4 | Pages: 4342-4348 | August 2019 |


This paper describes the advantages and disadvantages of a generator differential protection relay system which uses double slope characteristics of Areva P343, ABB REG670, SEL300G and GE G60. A Buon Tua Srah Hydropower Plant in Vietnam was selected as an example for the relay setting calculations of these characteristics. The performance of the introduced relay model was tested at various fault conditions in Matlab/Simulink. The results apply to the problems of solving the performance of the relay accurately and with reliable differential protection against internal faults, and keeping the generator stable on all external faults and in normal conditions. The simulation simplifies the process of selecting the relay and protection system. This can improve the quality of the protection system design early, thereby reducing the number of errors found later in the operation.


generator, differential protection function, slope 1, slope 2, Matlab/Simulink


Download data is not yet available.


Yu-Ting Huang, “Investigating the performance of generator protection relays using a real-time simulator”, The degree of Master of Science in Engineering, in the School of Electrical, Electronic and Computer Engineering, University of KwaZulu-Natal, Durban, South Africa. November 2013.

Donald Reimert,"Protection Relaying for Power Generation Systems", Taylor & Francis Group, Published in 2006.

IEEE Power Engineering Society, IEEE Guide for AC Generator Protection, IEEE Std C37.102™-2006.

ABB, "Generator protection REG670 Application manual", 2012.

ABB Engineering (Shanghai) Ltd, "G-T UNIT Protection Setting Calculations for Buon Tua Srah Hydro Power Plant", 2009.

Schneider Electric, "MiCOM 343 Generator Protection Relay - Technical Manual", 2011.

Ecidi - Alstom Consortium,"Se San 4 Hydropower Project 3*120mw Turbine Generator, 125rpm, 56.0m - Cscs System Protection Parameter Calculation, Vnss4-C3-9-001 /A”, 2010.

XJ Electricity Co., Ltd, "Generator relay protection setting calculation instruction", 2010.

SEL,"SEL-300G Multifunction Generator Relay Instruction Manual" 2018.

GE, "G60 Generator Protection System -Instruction Manual", 2015.

GE Grid Automation, “Application Book - CT Requirements for GE Multilin Relays”, 2016.

Ivo Brncic, Zoran Gajic, Stefan Roxenborg, “Adaptive differential protection for generators and shunt reactors”, ABB Power Technologies AB, Sweden, 2007.

Central Electrical Testing Company Limited, "The test record of current transformer 2500/1A, 5P20 30VA", 04/17/2014.

Kim Hung Le, Phan Huan Vu, “Testing and Evaluation of Factors Affecting the Current Transformer Saturation”, Journal of Science and Technology, Natural Science - Engineering - Technology, Thainguyen University, No 189 (13) 2018.


How to Cite

K. H. Le and P. H. Vu, “Performance Evaluation of a Generator Differential Protection Function for a Numerical Relay”, Eng. Technol. Appl. Sci. Res., vol. 9, no. 4, pp. 4342–4348, Aug. 2019.


Abstract Views: 630
PDF Downloads: 1008 Paper 2754: Proving reference file [10] Downloads: 0 Paper 2754: Proving reference file [12] Downloads: 0 Paper 2754: Proving reference file [18] Downloads: 0 Paper 2754: Proving reference file [19] Downloads: 0

Metrics Information
Bookmark and Share

Most read articles by the same author(s)