3차원 전류좌표계 해석법에 의한 DSP 전력분석 제어장치에 관한 연구

A study on DSP based power analyzing and control system by analysis of 3-dimensional space current co-ordinates

  • 임영철 (전남대 공대 전기공학과) ;
  • 정영국 (전남대 대학원 전기공학과) ;
  • 나석환 (전남대 대학원 전기공학과) ;
  • 최찬학 (전남대 대학원 전기공학과) ;
  • 장영학 (목포대 공대 전기공학과) ;
  • 양승학 (호남대 공대 전기공학과)
  • 발행 : 1996.04.01

초록

The goal of this paper is to developed a DSP based power analyzing and control system by 3-Dimensional (3-D) space current co-ordinates. A developed system is made up of 486-PC and DSP (Digital Signal Processor) board, Active Power Filter, Non-linear thyristor load, and Power analyzing and control program for Windows. Power is analyzed using signal processing techniques based on the correlation between voltage and current waveforms. Since power analysis algorithm is performed by DSP, power analysis is achieved in real-time even under highly dynamic nonlinear loading conditions. Combining control algorithm with power analysis algorithm is performed by DSP, power analysis is achieved in real-time even under highly dynamic nonlinear loading conditions. Combining control algorithm with power analysis algorithm, flexibility of the proposed system which has both power analysis mode and control mode, is greatly enhanced. Non-active power generated while speed of induction motor is controlled by modulating firing angle of thyristor converter, is compensated by Active Power Filter for verifying a developed system. Power analysis results, before/after compensation, are numerically obtained and evaluated. From these results, various graphic screens for time/frequency/3-D current co-ordinate system are displayed on PC. By real-time analysis of power using a developed system, power quality is evaluated, and compared with that of conventional current co-ordinate system. (author). refs., figs. tabs.

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