Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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A Study on the Voltage Stability Direct Analysis reflecting Load Increase Pattern

부하의 증가 패턴을 고려한 전압 안정도 직접 해석에 관한 연구

  • Moon, Y.H. (Dept. of Electrical Engineering, Yonsei University) ;
  • Choi, D.K. (Dept. of Electrical Engineering, Yonsei University) ;
  • Roh, T.H. (Dept. of Electrical Engineering, Yonsei University) ;
  • Lee, E.H. (Dept. of Electrical Engineering, Yonsei University)
  • Published : 1996.11.16
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Abstract

This paper develops a method for reliably estimating an UEP(Unstable Equilibrium Point) which is located in the direction of SEP(Stable Equilibrium Point)'s moving as system load is getting heavy. As power systems are getting loaded heavily, the SEP which is an operable solution, and the UEP which is occurring voltage collapse, are moving toward each other linearly. The estimated UEP is used as a good initial guess for the real UEP. The proposed method is tested by 3 bus system and Stagg 5 bus system. It is demonstrated that the proposed method is very useful for assessing system voltage stability in the case of heavy loaded power system. The result solutions are often used in conjunction with energy methods and the stability margin.

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