Journal of Electrical Engineering and Technology

The Korean Institute of Electrical Engineers (대한전기학회)
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Least Square Method: A Novel Approach to Determine Symmetrical Components of Power System

  • Rehman, Bilawal (School of Electrical and Electronic Engineering, North China Electric Power University) ;
  • Liu, Chongru (State Key Lab. for Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University) ;
  • Wang, Lili (School of Electrical and Electronic Engineering, North China Electric Power University)
  • Received : 2016.04.05
  • Accepted : 2016.07.26
  • Published : 2017.01.02
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Abstract

This paper proposes a novel approach to determine symmetrical components of power system by applying method of least squares in time domain. For the modern power system stability, clearance of faults on high voltage transmission lines in zero response time is crucial and important. Symmetrical components have a great attention since last century. They have been found an effective tool for the analysis of symmetrical and unsymmetrical faults in power system. Moreover, magnitude of symmetrical components are also used as a caution about faults in system. With rapid changes in technology, Microprocessor assumed to be fastest machine of the modern era. Hence microprocessor based techniques were developed and implemented for last few decades. The proposed technique apply least square method in the computation of symmetrical components which is suitable as an application in microprocessor based monitoring and controlling power system in order to avoid cascading failures. Simulation of proposed model is carried out in MATLAB/SIMULINK and all results exploit the validity of model.

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